CN108488969A - Control method and control device for handpiece Water Chilling Units - Google Patents

Abstract

The embodiment of the application discloses a control method and a control device for a chiller. A specific implementation of the method includes: according to the operation of the chiller, obtaining the actual operation data and the total load of the chiller; according to the actual operation data, determining the operating parameters of the chiller in the chiller; according to the operating parameters of the chiller, Determine the reference power consumption of the chiller; and control the operating state of the chiller in the chiller based on the total load and the reference power consumption of the chiller in the chiller. This embodiment can replace manual labor to realize automatic adjustment of the operating state of the chiller, thereby helping to improve operation and maintenance efficiency and reduce energy consumption of the chiller.

Description

Control method and control device for chiller

technical field

The embodiments of the present application relate to the field of computer technology, and in particular to a control method and a control device for chillers.

Background technique

A data center is usually an entire complex of facilities. It not only includes computer systems and other supporting equipment (such as communication and storage systems), but also includes redundant data communication connections, environmental control equipment, monitoring equipment, and various safety devices.

During the actual operation of the data center, cooling operation and maintenance costs often account for 60% to 70% of the entire operating cost of the data center. Among them, the energy consumption of chillers accounts for about 25% to 33% of the total energy consumption of the data center. Therefore, reducing the energy consumption of the chillers in the data center is a key factor in the energy saving of the data center.

Contents of the invention

The embodiment of the present application proposes a control method and a control device for a chiller.

In the first aspect, the embodiment of the present application provides a control method for chillers, including: obtaining the actual operation data and total load of the chillers according to the operation conditions of the chillers; The operating parameters of the chiller; according to the operating parameters of the chiller, the reference power consumption of the chiller is determined; based on the total load and the reference power consumption of the chiller in the chiller, the operating state of the chiller in the chiller is controlled.

In some embodiments, when each chiller in the chiller is in a stopped state, the actual operating data includes the current chilled water outlet temperature, the evaporator end difference during recent operation, the current load, the condenser end difference during recent operation, and the current environment temperature; and determine the operating parameters of the chiller in the chiller according to the actual operating data, including: determine the evaporation temperature of the chiller according to the current chilled water outlet temperature and the evaporator end difference during recent operation; The condenser end difference and the current ambient temperature determine the condensing temperature of the chiller.

In some embodiments, when some of the chillers in the chiller are turned on, the actual operating data includes the current operating data of the turned on chillers, the evaporator end difference when the chillers were stopped in the recent operation, and the recent running time when the chillers were stopped Condenser end difference, where the current operating data includes the current evaporating temperature, current condensing temperature, current evaporator end difference, and current condenser end difference of the chiller; and determine the operation of the chiller in the chiller according to the actual operating data Parameters, including: According to the current operating data of the cold machine, and the evaporator end difference and the condenser end difference of the recent operation of the cold machine when the cold machine is stopped, the evaporation temperature and the condensation temperature of the cold machine are determined.

In some embodiments, the operating parameters also include the current load of the chiller, wherein the current load of the chiller is obtained through the following steps: determining the current load of the chiller according to the rated load or historical load data of the chiller; or determining the current load of the chiller according to the total load and The preset number of chiller starts determines the current load of the chiller.

In some embodiments, based on the total load and the reference power consumption of the chillers in the chiller, controlling the operating state of the chillers in the chiller includes: determining the combination of chillers that meet the total load according to the reference power consumption of the chillers the total reference power consumption of the chiller combination; select the chiller combination according to the total reference power consumption of the chiller combination; and control the operating state of the chillers in the chiller set according to the operating parameters of the chillers in the selected chiller combination.

In some embodiments, based on the total load and the reference power consumption of the chiller in the chiller, controlling the operating state of the chiller in the chiller further includes: selecting a chiller not less than the preset power consumption according to the reference power consumption of the chiller Turn on a number of chillers, wherein the sum of the current loads of the selected chillers is not less than the total load; and control the operating status of the chillers in the chiller according to the operating parameters of the selected chillers.

In some embodiments, determining the reference power consumption of the chiller according to the operating parameters of the chiller includes: inputting the operating parameters of the chiller into a pre-trained power consumption model of the chiller to determine the reference power consumption of the chiller, wherein, The power consumption model of the chiller is used to predict the power consumption of the chiller according to the operating parameters of the chiller.

In a second aspect, an embodiment of the present application provides a control device for a chiller, including: an acquisition unit configured to acquire the actual operating data and total load of the chiller according to the operation of the chiller; a parameter determination unit, It is configured to determine the operating parameters of the chiller in the chiller according to the actual operating data; the power consumption determining unit is configured to determine the reference power consumption of the chiller according to the operating parameters of the chiller; the control unit is configured to determine the reference power consumption of the chiller based on the total The load and the reference power consumption of the chiller in the chiller control the operating status of the chiller in the chiller.

In some embodiments, when each chiller in the chiller is in a stopped state, the actual operating data includes the current chilled water outlet temperature, the evaporator end difference during recent operation, the current load, the condenser end difference during recent operation, and the current environment temperature; and the parameter determination unit is further configured to: determine the evaporation temperature of the chiller according to the current chilled water outlet temperature and the evaporator end difference during recent operation; determine the evaporation temperature of the chiller according to the current load, the condenser end difference during recent operation, and the current ambient temperature The condensing temperature of the chiller.

In some embodiments, when some of the chillers in the chiller are turned on, the actual operating data includes the current operating data of the turned on chillers, the evaporator end difference when the chillers were stopped in the recent operation, and the recent running time when the chillers were stopped The condenser end difference, wherein the current operating data includes the current evaporating temperature, the current condensation temperature, the current evaporator end difference and the current condenser end difference when the cold machine is turned on; and the parameter determination unit is further configured to: according to the start of the cold machine The current operating data, as well as the evaporator end difference and the condenser end difference during recent operation of the stopped chiller, determine the evaporation temperature and condensation temperature of the stopped chiller.

In some embodiments, the operating parameters also include the current load of the chiller; and the device further includes a load determination unit configured to: determine the current load of the chiller according to the rated load or historical load data of the chiller; or determine the current load of the chiller according to the total load and the preset number of chiller starts to determine the current load of the chiller.

In some embodiments, the control unit includes: a determining subunit, configured to determine the total reference power consumption of the cold machine combination that meets the total load according to the reference power consumption of the cold machine; The total reference power consumption of the chiller combination is used to select the chiller combination; and the first control subunit is configured to control the operating state of the chillers in the chiller set according to the operating parameters of the chillers in the selected chiller combination.

In some embodiments, the control unit further includes: a second selection subunit, configured to select a number of cold machines that are not less than the preset number of cold machines to be turned on according to the reference power consumption of the cold machines, wherein the selected cold machines The sum of the current loads is not less than the total load; the second control subunit is configured to control the operating state of the chillers in the chiller according to the selected operating parameters of the chillers.

In some embodiments, the power consumption determining unit is further configured to: input the operating parameters of the chiller into a pre-trained power consumption model of the chiller to determine the reference power consumption of the chiller, wherein the power consumption model of the chiller is used to The operating parameters of the chiller predict the power consumption of the chiller.

In a third aspect, the embodiment of the present application provides an electronic device, including: one or more processors; a storage device for storing one or more programs; when one or more programs are executed by one or more processors , so that one or more processors implement the method described in any embodiment of the first aspect above.

In a fourth aspect, an embodiment of the present application provides a computer-readable medium on which a computer program is stored, wherein, when the computer program is executed by a processor, the method described in any one of the embodiments of the first aspect above is implemented.

The control method and control device for chillers provided in the embodiments of the present application can determine the operating parameters of the chillers in the chiller by obtaining actual operating data of the chiller according to the operation of the chiller. Afterwards, according to the determined operating parameters of the cold machine, the reference power consumption of the cold machine can be further determined. Finally, based on the total load and the reference power consumption of the chillers in the chiller, the operating state of the chillers in the chiller can be controlled. That is to say, the control method or control device can realize the automatic control of the chiller according to the real-time data, thereby replacing the manual control. This helps to improve the operation and maintenance efficiency of the chiller and reduce the energy consumption of the chiller.

Description of drawings

Other characteristics, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

FIG. 1 is an exemplary system architecture diagram to which the present application can be applied;

FIG. 2 is a flowchart of an embodiment of a control method for a chiller according to the present application;

Fig. 3 is a schematic diagram of an application scenario of a control method for a chiller according to the present application;

Fig. 4 is a flow chart of another embodiment of a control method for a chiller according to the present application;

Fig. 5 is a structural schematic diagram of an embodiment of a control device for a chiller according to the present application;

FIG. 6 is a schematic structural diagram of a computer system suitable for implementing the electronic device of the embodiment of the present application.

Detailed ways

The application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain related inventions, rather than to limit the invention. It should also be noted that, for the convenience of description, only the parts related to the related invention are shown in the drawings.

It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and embodiments.

Fig. 1 shows an exemplary system architecture 100 to which a control method for a chiller or a control device for a chiller according to an embodiment of the present application can be applied.

As shown in FIG. 1 , the system architecture 100 may include terminals 101 , 102 , networks 103 , 105 , server 104 and chiller 106 . The network 103 may be used as a medium for providing communication links between the terminals 101 , 102 and the server 104 . Network 105 may be the medium used to provide a communication link between server 104 and chiller 106 . The networks 103, 105 may include various connection types, such as wires, wireless communication links, or fiber optic cables, among others.

Users can use the terminals 101, 102 to interact with the server 104 through the network 103 to receive or send messages and the like. Various client applications can be installed on the terminals 101 and 102, such as data center control systems, chiller control applications, model training applications, web browsers, and instant messaging tools.

The terminals 101 and 102 here may be hardware or software. When the terminals 101, 102 are hardware, they can be various electronic devices with display screens, including but not limited to smart phones, tablet computers, e-book readers, MP3 players (Moving Picture Experts Group Audio Layer III, moving picture expert compression Standard audio level 3), laptops and desktops, etc. When the terminals 101 and 102 are software, they can be installed in the electronic devices listed above. It can be implemented as a plurality of software or software modules (for example, to provide distributed services), or as a single software or software module. No specific limitation is made here.

The server 104 may be a server providing various services, for example, a background server providing support for various applications displayed on the terminals 101 and 102 . The background server can receive the control instructions sent by the terminals 101 and 102, so as to analyze and process the acquired actual operating data of the chiller, and can process the results (such as the determined operating parameters of the chiller in the chiller and/or adjusted The running status information of the cold machine) is sent to the terminals 101,102. In this way, the terminals 101 and 102 can display the processing results to the user.

The server 104 here can also be hardware or software. When the server 104 is hardware, it can be implemented as a distributed server cluster composed of multiple servers, or as a single server. When the server 104 is software, it can be implemented as multiple software or software modules (for example, for providing distributed services), or as a single software or software module. No specific limitation is made here.

The chiller unit 106 may include at least one chiller, such as chillers 1061 and 1062 . The chiller unit 106 can provide required cooling capacity (such as cooling water) to the cold end of the data center. At the same time, the chiller unit 106 can also recover the cooling capacity after heat exchange with the cold terminal. And the cold energy after re-refrigeration can be sent to the cold end again. This cycle is repeated to ensure the normal operation of the data center.

It should be noted that the control method for chillers provided in the embodiment of the present application is generally executed by the server 104 . Correspondingly, the control device for the chiller is generally disposed in the server 104 .

It should be understood that the terminal, network, server, chiller, and the number of chillers in the chiller in FIG. 1 are only illustrative. According to implementation requirements, there can be any number of terminals, networks, servers, chillers, and chillers in chillers.

Continue to refer to FIG. 2 , which shows a flow 200 of an embodiment of a control method for a chiller according to the present application. The control method for the chiller may include the following steps:

Step 201, according to the operation condition of the chiller, the actual operation data and the total load of the chiller are obtained.

In this embodiment, the execution subject of the control method for the chiller (for example, the server 104 shown in FIG. 1 ) may first determine the current operating conditions of the chiller. Afterwards, the actual operating data and total load of the chiller can be obtained according to the current operating condition of the chiller.

In this embodiment, the chiller is mainly used to provide cold energy to the cold end of the data center, so as to realize heat dissipation of the cold end and ensure the normal operation of the data center. Usually, the water chiller may include at least two chillers (such as chillers 1061 and 1062 shown in FIG. 1 ). Here, the operating status of the chiller mainly refers to the current operating status of each chiller in the chiller, for example, whether the chiller is currently on, or whether it is currently under maintenance.

Among them, the actual operation data of the chiller mainly refers to the parameter data of each chiller in the chiller during actual operation, such as the outlet water temperature and return water temperature of the chilled water, the flow rate of chilled water, and the like. It can be understood that the actual operation data of the chiller can be current operation data or historical operation data. These data are the data generated by the chiller during the actual working process. Its storage location is not limited in this application. The above-mentioned total load can be the cooling capacity required by the cold terminal, that is, the cooling load required by the chiller.

It should be noted that in the operating lines or pipelines of data centers and chillers, corresponding detection equipment, such as temperature sensors and flow meters, are often installed. Therefore, the actual operating data of the chiller can be obtained through these testing equipment. In this way, the executive body can use these detection devices to obtain actual operating data and total load through wired connection or wireless connection. As an example, the execution subject may also obtain required actual operation data from a database for storing historical operation data.

In some optional implementations of this embodiment, when all the chillers in the chiller are in a stopped state, the above actual operating data may include the current chilled water outlet temperature, the evaporator end difference during recent operation, the current load, Condenser tip difference and current ambient temperature during recent operation.

Here, since the chiller is in a stopped state, the current chilled water outlet temperature can be set arbitrarily by the user, for example, set according to the rated parameters in the factory data of the chiller. Or it can also be set according to the historical chilled water outlet temperature of the chiller, such as the chilled water outlet temperature during the latest operation, or the average or minimum value of the chilled water outlet temperature during the last several operations. The evaporator end difference during recent operation and the condenser end difference during recent operation may be respectively (but not limited to) the evaporator end difference and condenser end difference during the latest operation. The current load can also (but is not limited to) be user-set. The current ambient temperature can be determined by dry bulb temperature or wet bulb temperature. The ambient temperature here mainly refers to the outdoor ambient temperature. Moreover, the wet bulb temperature is more meaningful for the reference of the system whose cooling side is evaporative cooling mode in the water cooling system.

Optionally, when some of the chillers in the chiller are turned on, the actual operating data may include the current operating data of the chillers on, the evaporator end difference when the chillers were stopped in the recent operation, and the condensation when the chillers were stopped in the recent operation The end of the device is poor. Wherein, the current operation data may include the current evaporating temperature, the current condensing temperature, the current evaporator end difference and the current condenser end difference when the chiller is turned on.

It should be noted that the execution subject may obtain the actual operation data of each or part of the cooling machines, or obtain the actual operating data of each cooling machine that is not currently in failure.

Step 202, determine the operating parameters of the chillers in the chiller set according to the actual operating data.

In this embodiment, according to the actual operation data acquired in step 201, the execution subject can determine the operation parameters of the chillers in the chiller unit. Wherein, the operating parameters are mainly parameters related to the power consumption of the cooling machine. The operating parameters may be the current operating parameters of the currently turned on cold machine, or the set operating parameters of the currently stopped cold machine.

In some optional implementation manners of this embodiment, the operating parameters may include the evaporating temperature and the condensing temperature of the chiller. As an example, if all the chillers in the chiller are in a stopped state, the executive body can determine the evaporation temperature of the chiller according to the current chilled water outlet temperature of the chiller and the evaporator end difference during recent operation. At the same time, the condensing temperature of the chiller can be determined according to the current load of the chiller, the condenser end difference during recent operation, and the current ambient temperature.

Optionally, if some of the chillers in the chiller are in the open state, for the chillers in the stopped state, the executive body can use the current operating data of the chillers on, and the evaporator end difference and The end difference of the condenser during the recent operation determines the evaporation temperature and condensation temperature of the stop chiller. That is, the evaporation temperature of the off-cooler can be determined according to the current evaporating temperature and the current evaporator end difference when the off-cooler is on, and the evaporator end difference when the off-cooler is running recently. And the condensing temperature of the stopped cold machine can be determined according to the current condensing temperature of the turned-on cold machine and the current condenser end difference and the condenser end difference of the stopped cold machine in the recent operation. As for the cold machine in the turned-on state, the execution subject may use the current evaporation temperature and the current condensation temperature of the cold machine as the evaporation temperature and the condensation temperature of the cold machine respectively.

Further, since the power consumption of the chiller is usually closely related to the load of the chiller, the operating parameters may also include the current load of the chiller. For a cold machine that is in a stopped state, the executive body can determine the current load of the cold machine based on the rated load or historical load data of the cold machine; or it can also determine the cold machine based on the total load and the preset number of cold machine starts of the current load. As for the cold machine in the turned-on state, the current operating data of the turned-on cold machine may also include the current load of the turned-on cold machine. At this point, the execution subject can use the current load in the current operating data as the current load of the chiller. Alternatively, the method for determining the current load of the stopped cold machine may also be used to re-determine the current load of the turned-on cold machine. That is to redistribute the load of turning on the cold machine.

The specific steps of determining the current load of the chiller can be referred to in FIG. 4 , which will not be repeated here. Fig. 4 shows a flow chart of another embodiment of the control method for chillers provided by the present application.

Step 203: Determine the reference power consumption of the chiller according to the operating parameters of the chiller.

In this embodiment, based on the operating parameter determined in step 202, the execution subject may determine the reference power consumption of the chiller corresponding to the operating parameter. Wherein, the reference power consumption is the power consumption that may be generated when the cooling machine operates according to the determined operating parameters. That is, the power consumption of the chiller is predicted through the operating parameters of the chiller.

It can be understood that if the operating parameters of the cold machine in the turned-on state are the current operating data, that is to say, the current operating data of the turned-on cold machine has not been adjusted, then the reference power consumption of the turned-on cold machine is the current actual power consumption .

In some optional implementations of this embodiment, the executive body may input the operating parameters of the chiller into a pre-trained power consumption model of the chiller, so as to determine the reference power consumption of the chiller. Wherein, the power consumption model of the chiller can be used to predict the power consumption of the chiller according to the operating parameters of the chiller.

As an example, a cold machine power consumption model can be obtained through the following training steps:

First, the historical operating data of the chiller can be collected. Wherein, the historical operating data may include historical operating parameters and corresponding historical power consumption of the chillers in the chiller. For example, collect the historical operation data of the chiller in the past two years. The historical operating data may include historical power consumption generated by different chillers operating under different historical operating parameters (such as historical evaporating temperature, historical condensing temperature, and historical load).

It can be understood that, if the chiller has no historical operation data, or has little historical operation data, historical operation data of the same type or similar chiller can also be collected as training data.

Afterwards, the execution subject can use the historical operating parameters as input and the corresponding historical power consumption as output to train the initial model. Finally, the power consumption model of the cooling machine is obtained through training. Wherein, the initial model may be a neural network model constructed by using various existing machine learning techniques. The initial model can use various existing neural network structures, such as DenseBox, VGGNet, ResNet, SegNet, etc.

It should be noted that in the process of training the initial model, in order to avoid the phenomenon of overfitting of the model, the dropout method can be used to iteratively optimize the model. This method is generally based on the structure of the standard bp network (BackPropagation network, multi-layer feed-forward network), so that the activation value of the hidden layer of the bp network becomes 0 at a certain ratio. That is, according to a certain ratio, randomly let some hidden layer nodes fail. In the subsequent experimental test, on the basis of invalidating some hidden layer nodes, the input data is also invalidated in a certain proportion. In this way, for the case where there are too many parameters of the model and too few training samples, this method can effectively prevent the trained model from overfitting.

Optionally, historical operating parameters and historical power consumption can also be used to create a fitting curve. Wherein, the fitting curve can characterize the relationship between the operating parameters and the power consumption. In this way, when the operating parameters of the cooling machine are known, the executive body can also obtain the reference power consumption of the cooling machine by fitting the curve.

It can be understood that the operating parameters of the chiller are determined according to the actual operating data of each chiller, especially the actual operating data during its recent operation, such as the evaporator end difference and condenser end difference during the latest operation , and then predict the reference power consumption of the chiller. Since these data have more reference value, it can help to improve the accuracy of the determination result and reduce the deviation between the reference power consumption and the actual power consumption.

Step 204, based on the total load and the reference power consumption of the chillers in the chiller, control the running state of the chillers in the chiller.

In this embodiment, based on the total load obtained in step 201 and the reference power consumption of the chillers in the chiller set determined in step 203, the execution subject can determine the start or stop status of each chiller in the chiller set. And for the chiller that is determined to be turned on, the executive body can adjust the chiller according to the operating parameters of the chiller, so that the control of the operating state of the chiller in the chiller can be realized.

In some optional implementations of this embodiment, the executive body can first determine the total reference power consumption of the cold machine combination that meets the total load according to the reference power consumption of the cold machine; then, according to the total reference power consumption of the cold machine combination Select the chiller combination according to the power consumption; finally, the operating state of the chiller in the chiller unit can be controlled according to the operating parameters of the chiller in the selected chiller combination. For the specific control method, reference may be made to the relevant description in the embodiment in FIG. 4 , which will not be repeated here.

Optionally, the executive body can also select a number of cold machines that is not less than the preset number of cold machines to be turned on according to the reference power consumption of the cold machines. Wherein, the sum of the current loads of the selected chillers may not be less than the total load. Afterwards, the operating state of the chiller in the chiller can be controlled according to the selected operating parameters of the chiller. For the specific control method, reference may also be made to the relevant description in the embodiment in FIG. 4 , which will not be repeated here.

It can be understood that by obtaining the actual operating data of the chiller, the operating parameters of different chillers can be determined, and then the reference power consumption of different chillers can be determined. In this way, under the condition of ensuring that the total load is satisfied, real-time automatic control of the operating status of the chillers in the chiller can be realized according to the reference power consumption of different chillers. Instead of relying on the factory data of the chiller and the personal experience of the operation and maintenance personnel. In this way, more accurate and optimized energy-saving operation and maintenance suggestions can be provided for the operation of the chiller, including the start and stop status of the chiller and load distribution. In this way, not only the operation and maintenance efficiency of the chiller can be improved, but also the operation cost can be reduced.

Further referring to FIG. 3 , FIG. 3 is a schematic diagram of an application scenario of a control method for a chiller according to this embodiment. In the application scenario of FIG. 3 , the user can use the management application installed on the terminal 101 to realize the management and control of the chiller 106 . For example, after the user opens the management application and selects the automatic control mode. The server 104 that provides background support for the management application can first obtain the actual operation data A of the chiller according to the operation status of the chiller. Furthermore, the operating parameter B of each chiller 1061, 1062 in the chiller unit can be determined. Afterwards, according to the operating parameters B of each chiller, the reference power consumption C of each chiller can be further determined. Finally, based on the total load and the reference power consumption C of each chiller, a corresponding control signal can be generated to automatically control the running state of each chiller 1061, 1062 in the chiller.

At the same time, the server 104 can send the real-time running status of each chiller in the chiller unit to the terminal 101 . In this way, the real-time operation status of the chiller can be displayed to the user through the management application on the terminal 101 . It should be noted that the management application may include not only the above-mentioned automatic control mode, but also a manual control mode.

In the control method for chillers provided in this embodiment, the actual operation data of the chillers are obtained according to the operation conditions of the chillers, and then the operating parameters of the chillers in the chillers can be determined. Afterwards, according to the determined operating parameters of the cold machine, the reference power consumption of the cold machine can be further determined. Finally, based on the total load and the reference power consumption of the chillers in the chiller, the operating state of the chillers in the chiller can be controlled. That is to say, the control method can realize the automatic control of the chiller according to the real-time data, thereby replacing the manual control. This helps to improve the operation and maintenance efficiency of the chiller and reduce the energy consumption of the chiller.

Please refer to FIG. 4 , which shows a flow 400 of another embodiment of the control method for chillers provided by the present application. The control method for the chiller may include the following steps:

For the situation that all the chillers in the chiller are in a stopped state, the executive body (for example, the server 104 shown in FIG. 1 ) can confirm the current load of each chiller by two methods, so as to determine the reference power consumption of each chiller. Then determine the operation scheme with the minimum total reference power consumption of the chiller. specifically:

In step 401, the execution subject may determine the current load of each chiller according to the rated load or historical load of each chiller. For example, a chiller includes chillers A, B, C, and D. At this point, the current loads of chillers A, B, C, and D can be 5, 10, 10, and 8, respectively. Units are ignored.

In step 402, after determining the reference power consumption of each chiller, the executive body can determine the total reference power consumption of the combination of chillers meeting the total load. For example, the total load is 20 (the unit is the same as the current load of the chiller). At this time, the combination of chillers that meet the total load requirements can be: 1) chiller B+C, 2) chiller A+B+C, 3) chiller A+B+D, 4) chiller A+C+ D and 5) Cooling machine B+C+D.

In step 403, the execution subject may select a combination of cold machines according to the total reference power consumption of each combination of cold machines. Furthermore, the operating state of the chillers in the chiller unit can be controlled according to the operating parameters of the chillers in the selected chiller combination. Wherein, the selection method is not limited in this application. For example, the total reference power consumption of the above cold machine combinations 1)-5) is 18, 22, 21, 20 and 25 respectively. At this time, the executive body can select the cold machine combination with the smallest total reference power consumption (ie cold machine combination 1)B+C) from the five cold machine combinations. In this way, under the condition of ensuring that the total load is met, the power consumption of the chiller can be reduced to achieve the purpose of energy saving.

In some application scenarios, when the total load is satisfied, the execution subject can also generate display information to describe the cold machine combination with the smallest total reference power consumption under different numbers of cold machines. In this way, the user can select a combination of cooling machines including different numbers of cooling machines according to actual needs. Therefore, when different numbers of chillers are turned on, the power consumption of the chiller can be guaranteed to be low.

In step 404, the execution subject may also determine the current load of the cold machine according to the total load and the preset number of cold machines turned on. For example, if the total load is 20, the preset number of cold machines to be turned on is 3. At this time, in order to simplify the calculation process and improve control efficiency, the current load of each chiller can be 7 (that is, the quotient of the total load and the preset number of chillers turned on). As an example, the execution subject may also determine the distribution ratio according to the historical loads of every three cold machines, so as to determine the current loads of different cold machines.

It should be noted that the preset number of cold machines to be turned on is usually the minimum number of turned on cold machines that satisfy the total load. Since the chillers in the chiller are generally of the same model, the preset number of chillers to be turned on can be determined according to the rated power consumption, rated load, and personal experience of the chillers.

In step 405, after determining the reference power consumption of each cold machine, the executive body can select a number of cold machines not less than the preset number of cold machines to be turned on. Furthermore, according to the selected operating parameters of the chiller, the operating state of the chiller in the chiller unit can be controlled. Wherein, the sum of the current loads of the selected cold machines should not be less than the total load. The selection method here is also not limited.

For example, the reference power consumption of chillers A-D are 1, 4, 2, 3 and 5 respectively. At this time, in the order of the reference power consumption from small to large, select 3 cold machines (ie, cold machines A, C, and D) from the end with the smallest reference power consumption. This selection method also helps to reduce the power consumption of the chiller. It should be noted that since the current load of each chiller is 7, any selection of at least 3 chillers can meet the requirement of a total load of 20.

In some application scenarios, the execution subject can also generate list information. Wherein, the list information may include cold machine identifiers arranged in ascending order of reference power consumption. The chiller ID can be used to uniquely indicate the corresponding chiller. In this way, the user can start from the end with the lower power consumption referenced in the list information, and select any required number of cold machines to be turned on. And it can ensure that the power consumption of the chiller is low.

For the situation that some of the chillers in the chiller are turned on, the executive body can determine the current load of the chillers through the following steps, so as to determine the reference power consumption of each chiller. Then determine the operation scheme with the minimum total reference power consumption of the chiller. specifically:

In step 406, for the cold machine in the turned-on state, the execution subject may obtain its current actual running load as its current load. For a chiller that is in a stopped state, the execution subject can determine the current load of the stopped chiller based on the rated load of the stopped chiller, historical load data, or the current load of the currently turned on chiller.

In step 407, after determining the reference power consumption of each chiller, the executive body can also determine the total reference power consumption of the combination of chillers meeting the total load. Reference may be made to related descriptions in step 402, which will not be repeated here. Wherein, the total load may be greater than the sum of loads of currently turned on cold machines. That is to say, the number of chillers currently turned on cannot meet the demand.

In step 408, the execution subject can select the combination of cooling machines with the smallest total reference power consumption according to the total reference power consumption of each combination of cooling machines, so as to reduce the power consumption of the chiller unit. For example, reference may be made to related descriptions in step 403, which will not be repeated here.

In addition, in order to reduce the number of repeated startup and shutdown of the chiller, so as not to affect the data center, the execution subject can also select the chiller combination with the smallest total reference power consumption from the chiller combinations including the currently turned on chillers. The inclusion here may include all the currently turned on cold machines, or include some of the currently turned on cold machines. For example, chillers A and D are currently turned on. At this time, the cold machine combination 4) with the smallest total reference power consumption can be selected from the cold machine combinations 3) (A+B+D) and 4) (A+C+D). Alternatively, the cold machine combination 4) with the smallest total reference power consumption can be selected from the cold machine combinations 2) to 5).

In step 409, the executive body may also determine the current load of the cold machine according to the total load and the preset number of cold machines turned on. Wherein, the preset number of turned on cold machines may be greater than the number of currently turned on cold machines.

For example, if the load of the currently turned on chiller remains unchanged, then for stopping the chiller, the execution subject may calculate the difference L1 between the total load and the load of the currently turned on chiller. And the difference L2 between the preset number of cold machines turned on and the number of currently turned on cold machines can be calculated. In this way, the current load of the stopped chiller can be the quotient of L1 and L2. For another example, the executive body may use the quotient of the total load and the preset number of cold machines turned on as the current load of each cold machine. That is to redistribute the load to the currently turned on cold machine.

In step 410, the executive body may also select a number of cold machines that are not less than the preset number of cold machines to be turned on from the smaller end according to the order of the reference power consumption from small to large.

For example, the execution subject may select a cold machine according to the method described in step 405 . Or in order to reduce the number of repeated start and stop of the cold machines, the executive body can select a corresponding number (such as L2) of cold machines from the small end in the order of the reference power consumption of the stopped cold machines from small to large.

It can be understood that, for the case where the total load is less than the sum of the loads of the currently turned on cold machines, or the preset number of turned on cold machines is greater than the number of currently turned on cold machines. In other words, the cooling capacity of the current chiller is greater than the actual demand. The executive body can also determine the current load of each cold machine according to the above-mentioned various methods. And choose a cold machine with a lower reference power consumption to produce cooling capacity. So as to realize the energy-saving operation of the chiller.

In the control method for the chiller in this embodiment, various methods may be used to determine the load of the chiller in the chiller. At the same time, the corresponding energy-saving operation control scheme can be selected according to the different operating conditions of the chiller. In this way, different usage requirements can be met, and the scope of application of the control method can be improved.

Continuing to refer to FIG. 5 , as an implementation of the methods shown in the above figures, the present application provides an embodiment of a control device for a chiller. The embodiment of the control device corresponds to the embodiment of the control method shown in FIG. 2 to FIG. 4 , and the control device can be specifically applied to various electronic devices.

As shown in FIG. 5 , the control device 500 for a chiller in this embodiment may include: an acquisition unit 501 configured to acquire the actual operating data and total load of the chiller according to the operating conditions of the chiller; a parameter determination unit 502 , configured to determine the operating parameters of the chiller in the chiller according to the actual operating data; the power consumption determining unit 503 is configured to determine the reference power consumption of the chiller according to the operating parameters of the chiller; the control unit 504 is used for configuration The operating state of the chillers in the chiller is controlled based on the total load and the reference power consumption of the chillers in the chiller.

In some optional implementations of this embodiment, when each chiller in the chiller is in a stopped state, the actual operation data may include the current chilled water outlet temperature, the evaporator end difference during recent operation, the current load, the recent operation and the parameter determination unit 502 can be further configured to: determine the evaporation temperature of the chiller according to the current chilled water outlet temperature and the evaporator end difference during recent operation; The condenser end difference and the current ambient temperature determine the condensing temperature of the chiller.

Optionally, when some of the chillers in the chiller are turned on, the actual operating data may include the current operating data of the chillers on, the evaporator end difference when the chillers were stopped in the recent operation, and the condensation when the chillers were stopped in the recent operation The current operating data may include the current evaporating temperature, the current condensing temperature, the current evaporator end difference, and the current condenser end difference when the cold machine is turned on; and the parameter determination unit 502 may be further configured to: The current operating data of the chiller, as well as the evaporator end difference and the condenser end difference during recent operation of the stopped chiller, determine the evaporation temperature and condensation temperature of the stopped chiller.

Further, the operating parameters may also include the current load of the chiller; and the control device 500 may also include a load determination unit (not shown in FIG. 5 ), configured to: determine the load of the chiller according to the rated load or historical load data of the chiller. The current load of the chiller; or determine the current load of the chiller according to the total load and the preset number of chillers turned on.

In some embodiments, the control unit 504 may include: a determination subunit (not shown in FIG. 5 ), configured to determine the total reference power consumption of the combination of cold machines satisfying the total load according to the reference power consumption of the cold machines; the second A selection subunit (not shown in Figure 5), configured to select the cold machine combination according to the total reference power consumption of the cold machine combination; and a first control subunit (not shown in Figure 5), configured to select the cold machine combination according to the selected The operating parameters of the chiller in the chiller combination control the operating state of the chiller in the chiller.

Optionally, the control unit may further include: a second selection subunit (not shown in FIG. 5 ), configured to select a number of cold machines that are not less than a preset number of cold machines to be turned on according to the reference power consumption of the cold machines, wherein , the sum of the current loads of the selected chillers is not less than the total load; the second control subunit (not shown in Figure 5) is configured to control the load of the chillers in the chiller according to the selected operating parameters of the chillers Operating status.

In some embodiments, the power consumption determination unit 503 may be further configured to: input the operating parameters of the chiller into a pre-trained power consumption model of the chiller to determine the reference power consumption of the chiller, wherein the power consumption model of the chiller is used It is used to predict the power consumption of the chiller according to the operating parameters of the chiller.

It can be understood that the units recorded in the control device 500 correspond to the steps in the method described with reference to FIG. 2 to FIG. 4 . Therefore, the operations, features and beneficial effects described above for the method are also applicable to the control device 500 and the units contained therein, and will not be repeated here.

Referring to FIG. 6 below, it shows a schematic structural diagram of a computer system 600 suitable for implementing the electronic device of the embodiment of the present application. The electronic device shown in FIG. 6 is only an example, and should not limit the functions and scope of use of this embodiment of the present application.

As shown in FIG. 6 , a computer system 600 includes a central processing unit (CPU) 601 that can be programmed according to a program stored in a read-only memory (ROM) 602 or a program loaded from a storage section 608 into a random-access memory (RAM) 603 Instead, various appropriate actions and processes are performed. In the RAM 603, various programs and data necessary for the operation of the system 600 are also stored. The CPU 601 , ROM 602 , and RAM 603 are connected to each other through a bus 604 . An input/output (I/O) interface 605 is also connected to the bus 604 .

The following components are connected to the I/O interface 605: an input section 606 including a touch screen, a keyboard, a mouse, a camera, etc.; an output section 607 including a cathode ray tube (CRT), a liquid crystal display (LCD), etc., and a speaker; including a hard disk and a communication section 609 including a network interface card such as a LAN card, a modem, and the like. The communication section 609 performs communication processing via a network such as the Internet. A drive 610 is also connected to the I/O interface 605 as needed. A removable medium 611 such as a magnetic disk, optical disk, magneto-optical disk, semiconductor memory, etc. is mounted on the drive 610 as necessary so that a computer program read therefrom is installed into the storage section 608 as necessary.

In particular, according to an embodiment of the present disclosure, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, embodiments of the present disclosure include a computer program product, which includes a computer program carried on a computer-readable medium, where the computer program includes program codes for executing the methods shown in the flowcharts. In such an embodiment, the computer program may be downloaded and installed from a network via communication portion 609 and/or installed from removable media 611 . When the computer program is executed by the central processing unit (CPU) 601, the above-mentioned functions defined in the method of the present application are performed. It should be noted that the computer-readable medium in the present application may be a computer-readable signal medium or a computer-readable storage medium or any combination of the above two. A computer readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples of computer-readable storage media may include, but are not limited to, electrical connections with one or more wires, portable computer diskettes, hard disks, random access memory (RAM), read-only memory (ROM), erasable Programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination of the above. In this application, a computer-readable medium may be any tangible medium that contains or stores a program that can be used by or in conjunction with an instruction execution system, apparatus, or device. In this application, however, a computer-readable signal medium may include a data signal propagated in baseband or as part of a carrier wave, in which computer-readable program codes are carried. Such propagated data signals may take many forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the foregoing. A computer-readable signal medium may also be any computer-readable medium other than a computer-readable storage medium, which can send, propagate, or transmit a program for use by or in conjunction with an instruction execution system, apparatus, or device. . Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.

The flowchart and block diagrams in the Figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present application. In this regard, each block in a flowchart or block diagram may represent a module, program segment, or portion of code that contains one or more logical functions for implementing specified executable instructions. It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or they may sometimes be executed in the reverse order, depending upon the functionality involved. It should also be noted that each block of the block diagrams and/or flowchart illustrations, and combinations of blocks in the block diagrams and/or flowchart illustrations, can be implemented by a dedicated hardware-based system that performs the specified functions or operations , or may be implemented by a combination of dedicated hardware and computer instructions.

The units involved in the embodiments described in the present application may be implemented by means of software or by means of hardware. The described units may also be set in a processor. For example, it may be described as: a processor includes an acquisition unit, a parameter determination unit, a power consumption determination unit, and a control unit. Among them, the names of these units do not constitute a limitation of the unit itself under certain circumstances. For example, the acquisition unit can also be described as a unit that acquires the actual operating data and total load of the chiller according to the operation of the chiller. ".

As another aspect, the present application also provides a computer-readable medium. The computer-readable medium may be included in the electronic device described in the above-mentioned embodiments; or it may exist independently without being assembled into the electronic device. middle. The above-mentioned computer-readable medium carries one or more programs, and when the above-mentioned one or more programs are executed by the electronic device, the electronic device: obtains the actual operation data and total load of the chiller according to the operation of the chiller; According to the actual operation data, determine the operating parameters of the chiller in the chiller; determine the reference power consumption of the chiller according to the operating parameters of the chiller; based on the total load and the reference power consumption of the chiller in the chiller, control the chiller The operating state of the cooling machine.

The above description is only a preferred embodiment of the present application and an illustration of the applied technical principles. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to the technical solution formed by the specific combination of the above-mentioned technical features, and should also cover the technical solutions formed by the above-mentioned technical features or without departing from the above-mentioned inventive concept. Other technical solutions formed by any combination of equivalent features. For example, a technical solution formed by replacing the above-mentioned features with technical features with similar functions disclosed in (but not limited to) this application.

Claims (16)

1. A control method for a chiller, comprising: Obtain the actual operation data and total load of the chiller according to the operation condition of the chiller; According to the actual operation data, determine the operation parameters of the chiller in the chiller; According to the operating parameters of the chiller, determine the reference power consumption of the chiller; Based on the total load and the reference power consumption of the chillers in the chiller set, the operating state of the chiller in the chiller set is controlled. 2. The method according to claim 1, wherein, when each chiller in the chiller is in a stopped state, the actual operating data includes the current chilled water outlet temperature, the evaporator end difference during recent operation, the current load , condenser end difference and current ambient temperature during recent operation; and The determining the operating parameters of the chiller in the chiller according to the actual operating data includes: Determine the evaporation temperature of the chiller according to the current chilled water outlet temperature and the evaporator end difference during recent operation; determine the condensing temperature of the chiller according to the current load, the condenser end difference during recent operation, and the current ambient temperature. 3. The method according to claim 1, wherein, when some of the chillers in the chiller are turned on, the actual operating data includes the current operating data of turning on the chillers, evaporation of the recent operation of the chillers stopped The difference between the condenser end and the condenser end difference during the recent operation of the stopped chiller, wherein the current operating data includes the current evaporating temperature, the current condensing temperature, the current evaporator end difference and the current condenser end difference when the cold machine is turned on; and The determining the operating parameters of the chiller in the chiller according to the actual operating data includes: According to the current operating data of the cold machine being turned on, and the evaporator end difference and the condenser end difference of the recent operation of the cold machine when the cold machine is stopped, the evaporation temperature and the condensation temperature of the cold machine are determined. 4. The method according to any one of claims 1-3, wherein the operating parameters further include the current load of the cold machine, wherein the current load of the cold machine is obtained by the following steps: The current load of the chiller is determined according to the rated load or historical load data of the chiller; or the current load of the chiller is determined according to the total load and the preset number of start-ups of the chiller. 5. The method according to claim 4, wherein the controlling the operating state of the chiller in the chiller based on the total load and the reference power consumption of the chiller in the chiller comprises: According to the reference power consumption of the cold machine, determine the total reference power consumption of the combination of cold machines that meet the total load; Select the cold machine combination according to the total reference power consumption of the cold machine combination; and According to the operating parameters of the chillers in the selected chiller combination, the running state of the chillers in the chiller unit is controlled. 6. The method according to claim 4, wherein the controlling the operating state of the chillers in the chiller based on the total load and the reference power consumption of the chillers in the chiller further comprises: According to the reference power consumption of the cold machines, select the cold machines that are not less than the preset number of cold machines to be turned on, wherein the sum of the current loads of the selected cold machines is not less than the total load; According to the selected operating parameters of the chiller, the operating state of the chiller in the chiller is controlled. 7. The method according to claim 1, wherein said determining the reference power consumption of the cold machine according to the operating parameters of the cold machine comprises: Inputting the operating parameters of the chiller into the pre-trained power consumption model of the chiller to determine the reference power consumption of the chiller, wherein the power consumption model of the chiller is used to predict the power consumption of the chiller according to the operating parameters of the chiller. 8. A control device for a chiller, comprising: The acquisition unit is configured to acquire the actual operation data and total load of the chiller according to the operation condition of the chiller; A parameter determining unit configured to determine the operating parameters of the chillers in the chiller according to the actual operating data; The power consumption determination unit is configured to determine the reference power consumption of the cold machine according to the operating parameters of the cold machine; The control unit is configured to control the operating state of the chillers in the chiller set based on the total load and the reference power consumption of the chillers in the chiller set. 9. The device according to claim 8, wherein, when each chiller in the chiller is in a stopped state, the actual operating data includes the current chilled water outlet temperature, the evaporator end difference during recent operation, the current load , condenser end difference and current ambient temperature during recent operation; and The parameter determination unit is further configured to: Determine the evaporation temperature of the chiller according to the current chilled water outlet temperature and the evaporator end difference during recent operation; determine the condensing temperature of the chiller according to the current load, the condenser end difference during recent operation, and the current ambient temperature. 10. The device according to claim 8, wherein, when some of the chillers in the chiller are turned on, the actual operating data includes the current operating data of turning on the chillers, the evaporation of the recent operation of the stopped chillers The difference between the condenser end and the condenser end difference during the recent operation of the stopped chiller, wherein the current operating data includes the current evaporating temperature, the current condensing temperature, the current evaporator end difference and the current condenser end difference when the cold machine is turned on; and The parameter determination unit is further configured to: According to the current operating data of the cold machine being turned on, and the evaporator end difference and the condenser end difference of the recent operation of the cold machine when the cold machine is stopped, the evaporation temperature and the condensation temperature of the cold machine are determined. 11. The apparatus according to any one of claims 8-10, wherein the operating parameters further comprise the current load of the chiller; and The apparatus also includes a load determination unit configured to: The current load of the chiller is determined according to the rated load or historical load data of the chiller; or the current load of the chiller is determined according to the total load and the preset number of start-ups of the chiller. 12. The apparatus of claim 11, wherein the control unit comprises: The determination subunit is configured to determine the total reference power consumption of the combination of cold machines satisfying the total load according to the reference power consumption of the cold machines; The first selection subunit is configured to select a cold machine combination according to the total reference power consumption of the cold machine combination; and The first control subunit is configured to control the operating state of the chillers in the chiller set according to the selected operating parameters of the chillers in the chiller combination. 13. The apparatus of claim 11, wherein the control unit further comprises: The second selection subunit is configured to select a number of cold machines that is not less than the preset number of cold machines to be turned on according to the reference power consumption of the cold machines, wherein the sum of the current loads of the selected cold machines is not less than the total load; The second control subunit is configured to control the operating state of the chiller in the chiller according to the selected operating parameters of the chiller. 14. The apparatus according to claim 8, wherein the power consumption determining unit is further configured to: Inputting the operating parameters of the chiller into the pre-trained power consumption model of the chiller to determine the reference power consumption of the chiller, wherein the power consumption model of the chiller is used to predict the power consumption of the chiller according to the operating parameters of the chiller. 15. An electronic device comprising: one or more processors; storage means for storing one or more programs; When the one or more programs are executed by the one or more processors, the one or more processors are made to implement the method according to any one of claims 1-7. 16. A computer-readable medium, on which a computer program is stored, wherein the computer program implements the method according to any one of claims 1-7 when executed by a processor.