CN207379092U - Multi-source multi-generation system - Google Patents

Abstract

The present disclosure relates to a multi-source multi-generation system, which includes: a plurality of energy supply source units, including at least a solar heat collection unit, a natural gas heat collection unit, and an external power supply; a power generation device based on receiving a first heat transfer working medium pipeline The heat inside is converted thermoelectrically, and the generated electric energy is sent to multiple electrical equipment; the heat storage unit stores the heat from the liquid metal flowing in the first heat transfer medium pipeline; the refrigeration equipment utilizes the heat storage The heat brought by the heat transfer working medium in the second heat transfer working medium pipeline of the unit for cooling; and the heating and hot water supply unit, which uses the third heat transfer working medium pipeline passing through the heat storage unit to heat the first Three heat transfer water in the working medium pipeline, so as to heat and supply hot water.

Description

Multi-source multi-generation system

technical field

The present disclosure relates to a multi-source multi-generation system, in particular to a multi-source multi-generation system that mainly utilizes solar energy.

Background technique

Solar energy is mainly used for power generation or heat storage for hot water supply or heating. The industrial application of solar energy is mainly used for power generation. There are two main forms of power generation: solar photovoltaic power generation and solar thermal power generation. But on sundown or cold days, solar power generation and heating and hot water supply will be limited.

Therefore, people need a multi-source multi-generation system that can simultaneously improve solar energy utilization efficiency and ensure full-time power supply, heating or hot water supply.

Contents of the invention

The purpose of the present disclosure is to solve one or more defects in the above-mentioned prior art, so as to provide a multi-source multi-generation system, which includes: a plurality of energy supply source units, at least including solar heat collection units, natural gas heat collection units And an external power supply, wherein, the solar heat collection unit is arranged at the light collection point to collect the thermal energy of the sunlight collected by the light collection unit, thereby heating the liquid metal in the solar heat collection unit, and passing through the solar heat collection unit The liquid metal pump at the inlet or outlet of the liquid metal makes the liquid metal flow in the first heat transfer medium pipeline. The natural gas heat collection unit is arranged in the gas furnace to collect the heat released by the combustion of natural gas to heat the natural gas flowing through it. The liquid metal in the liquid metal chamber of the heat collecting unit, and the liquid metal pump arranged at the liquid metal inlet or outlet of the natural gas heat collecting unit makes the liquid metal flow in the first heat transfer working medium pipeline, and the external connection The power supply unit is connected to the external mains and connected to various electrical equipment through the power switch; the power generation device performs thermoelectric conversion based on receiving the heat in the first heat transfer medium pipeline, and transmits the generated electric energy to multiple electrical appliances equipment; heat storage unit, storing heat from liquid metal flowing in the first heat transfer working medium pipeline; refrigeration equipment, which utilizes the heat transfer working medium belt in the second heat transfer working medium pipeline flowing through the heat storage unit and the heating and hot water supply unit, which uses the third heat transfer working medium pipeline passing through the heat storage unit to heat the water in the third heat transfer working medium pipeline, thereby heating and supplying heat water.

According to the multi-source multi-generation system of the present disclosure, the heat storage unit is a phase-change heat storage, which accommodates a phase-change energy storage material, and the liquid metal pipeline passes through the phase-change energy storage material, thereby Excess heat is stored in the phase change energy storage material.

According to the multi-source multi-generation system of the present disclosure, the power generation device is a Stirling generator or a turbo generator.

According to the multi-source multi-generation system of the present disclosure, the solar heat collection unit may be a trough type solar heat collector, a butterfly type solar heat collector, or a tower type solar heat collector.

According to the multi-source multi-generation system of the present disclosure, it also includes the intersection of the first heat transfer working medium pipeline of the solar collector and the first heat transfer working medium pipeline of the natural gas heat collection unit. The three-way valve and the controller, when the illuminance is lower than the predetermined threshold, the controller starts the natural gas gas furnace and opens the three-way valve on the first heat transfer medium pipeline leading to the natural gas heat collection unit, so as to burn the natural gas to the second A heat transfer working medium is supplemented with heating to keep the temperature and energy carrying capacity of the heat transfer working medium stable.

According to the multi-source multi-generation system of the present disclosure, when the air temperature is lower than a predetermined temperature threshold, the controller directly shuts down the power generation device and the refrigeration device and turns on the mains switch, so as to supply power to electrical equipment through the mains.

According to the multi-source multigeneration system of the present disclosure, the low melting point metal is a gallium-based alloy or a lead-bismuth alloy.

According to the multi-source multi-generation system of the present disclosure, the part of the third heat transfer working medium pipe outside the heat storage unit is a pipe-in-tube structure, the inner pipe is filled with the third heat transfer working medium, and the outer pipe The interlayer with the inner pipe is filled with flowing water, and the outer wall of the outer pipe has a thermal insulation layer.

According to the multi-source multi-generation system of the present disclosure, the refrigeration equipment is an absorption refrigeration equipment.

According to the multi-source multigeneration system of the present disclosure, the phase change energy storage material is molten salt.

The multi-source and multi-coupling system of the present invention, through the energy storage and the control system, rationally utilizes energy sources such as solar energy, natural gas, and electric energy to realize the functions of power supply, cooling, heating, and domestic hot water supply of the system, and realize energy conservation. Reasonable utilization increases the utilization of renewable energy, making the system more energy-saving and environmentally friendly.

Description of drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description serve to explain the principles of the disclosure.

Fig. 1 is a schematic structural diagram of an embodiment using a multi-source multi-generation system according to the present disclosure.

Figure 2 shows a schematic diagram of the internal structure of the heat storage unit.

Fig. 3 is a schematic structural diagram of a third heat transfer working fluid pipeline using the multi-source multi-generation system according to the present disclosure.

4 and 5 are schematic diagrams showing the principle structure of the power generation equipment using the embodiment of the multi-source multigeneration system according to the present disclosure.

Detailed ways

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the present disclosure.

The terminology used in the present disclosure is for the purpose of describing particular embodiments only and is not intended to limit the present disclosure. As used in this disclosure, the singular forms "a", "the", and "the" are intended to include the plural forms as well, unless the context clearly dictates otherwise. It should also be understood that the term "and/or" as used herein refers to and includes any and all possible combinations of one or more of the associated listed items.

It should be understood that although the terms first, second, third, etc. may be used in the present disclosure to describe various information, the information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. Moreover, even if "first" is mentioned, it does not mean that there must be "second" or that the next identical unit must be defined as "second", but can be directly defined as "third". Likewise, even if a "second" is mentioned, it should not be assumed that there must be a "first". For example, a first element could be termed a second element, and similarly, a second element could also be termed a first element, without departing from the scope of the present disclosure. Depending on the context, the word "if" as used herein may be interpreted as "at" or "when" or "in response to a determination."

In order to enable those skilled in the art to better understand the present disclosure, the present disclosure will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

Fig. 1 is a schematic structural diagram of an embodiment using a multi-source multi-generation system according to the present disclosure. The multi-source multi-generation system includes multiple energy supply sources, such as solar energy, natural gas furnaces, and commercial power. Access to geothermal sources if required.

When the weather is sunny and sunny, the concentrating device (not shown, usually a trough solar concentrating device, a butterfly solar concentrating device, a tower solar concentrating device) light device) gathers external light to the light collection point (this will be described in detail later); the heat collection unit 110 is arranged at the light collection point to collect the thermal energy of the sunlight collected by the light collection device, thereby heating the heat in the heat collection unit Liquid metal, and the liquid metal pump (not shown) arranged at the liquid metal inlet or outlet of the heat collection unit 110 makes the liquid metal flow in the first heat transfer working medium pipeline (that is, the liquid metal pipeline).

The first heat transfer working medium pipeline enters the heat exchanger of the power generation device. In the heat exchanger of the power generation device, the water in the heat exchanger can be heated to become water vapor to drive the steam turbine to rotate, thereby driving the generator to rotate and generate electricity. The hot end of the Stirling generator can be directly heated by the liquid metal in the first heat transfer working medium pipeline, and the piston of the Stirling generator can be driven to generate electricity. Although the first heat transfer working medium pipeline shown in FIG. 1 points to the power generation device, the first heat transfer working medium pipeline can also be directly branched to the heat storage unit 140, and part of the heat of the liquid metal is directly stored in the heat storage unit. In the phase change heat storage material in the heat storage cavity.

FIG. 2 shows a schematic diagram of the internal structure of the heat storage unit 140 in FIG. 1 . As shown in Figure 2, a heat storage working medium can be arranged in the heat storage unit 140, and three kinds of heat transfer tubes or built-in pipelines are embedded in the heat storage working medium, for example, the first heat transfer working medium pipeline 120 and 130 (that is, the liquid metal pipeline), the second heat transfer working medium pipeline 160 and 170, and the third heat transfer working medium pipeline 240 and 250. These pipelines are arranged alternately in the heat storage unit 140, so that the heat of the high-temperature liquid metal flowing through the first heat transfer working medium pipelines 120 and 130 is transferred to the surrounding heat storage working medium and the second heat transfer working medium tube as soon as possible. The second heat transfer working fluid in the circuit and the third heat transfer working fluid pipeline in the third heat transfer working fluid pipeline. The third heat transfer working medium tubes in the third heat transfer working medium pipelines 240 and 250 enter the third heat exchanger under the pumping of the working medium pump after absorbing the heat released by the heat storage working medium or liquid metal , and transfer the heat of the third heat transfer working medium to the water pumped into the heat exchanger through the third heat exchanger, so as to heat the water into high-temperature hot water or steam, so that at the radiator, The heat is released into the surrounding air to heat the room, which is convenient for people to keep warm in winter. Or, directly replace the radiator with a hot water pipe faucet to provide people with domestic hot water.

Returning to FIG. 1 , as shown in FIG. 1 , the heat carried by the heat transfer working medium in the second or third heat transfer working medium pipeline can be used for refrigeration by the absorption refrigeration equipment.

Fig. 3 is a schematic structural diagram of a third heat transfer working fluid pipeline using the multi-source multi-generation system according to the present disclosure. As shown in FIG. 3 , the cross-section of the second or third heat transfer and working medium pipeline shows that it is a casing structure. The inner pipe is filled with the third heat transfer working fluid, the interlayer between the outer pipe and the inner pipe is filled with flowing water, and the outer wall of the outer pipe has a thermal insulation layer. Optionally, the cross-sectional structure only exists in the outer part of the heat storage unit, and the third heat transfer working medium pipeline only has an inner pipe part in the heat storage unit 140 . In this way, there is no need to specially set up a heat exchanger for heat exchange between the third heat transfer working medium and water in the heating and hot water supply structure, which saves the system cost. Moreover, this structure can ensure that the heat transfer medium will not solidify when the solar system is not working at night when the winter is cold because the outer wall of the outer tube has a thermal insulation layer.

Fig. 4 is a schematic diagram showing the principle structure of the power generation equipment using the embodiment of the multi-source multigeneration system according to the present disclosure. As shown in Figure 4, the liquid metal in the first heat transfer tube passes through the hot chamber of the Stirling generator, and releases heat to heat the working fluid in the hot chamber to drive the piston to move, while the liquid metal in the cold chamber During the movement of the piston, the working fluid is compressed and the heat is released to the surrounding environment. For example, in Fig. 4, the heat released by the cold cavity can be dissipated by a fan.

In order to make full use of energy, the heat released by the cold chamber of the generator can be used. FIG. 5 is another schematic structural diagram of the power generation equipment using the embodiment of the multi-source multigeneration system according to the present disclosure. As shown in Figure 5, the cold chamber is placed in a heat exchanger, and water cooling is used in the heat exchanger to dissipate heat from the cold chamber. The heat generated by the piston compressing the working medium in the cold chamber is released into the cold water of the heat exchanger, thereby heating the flowing cold water, thereby providing domestic hot water for users. This allows the thermal energy to be fully utilized.

A multi-source multigeneration system according to the present disclosure may include a controller that determines whether to use multiple energy sources to power the system based on the weather of each day.

According to the multi-source multi-generation system of the present disclosure, it also includes a controller (not shown) and a first heat transfer pipe set between the first heat transfer working medium pipeline of the solar collector and the natural gas heat collection unit. A three-way valve (not shown) at the junction of the working fluid pipelines. When the illuminance is lower than a predetermined threshold, the controller starts the natural gas furnace and opens the three-way valve on the first heat transfer medium pipeline leading to the natural gas heat collection unit, so as to burn the first heat transfer medium through natural gas. Supplementary heating keeps the temperature and energy carrying capacity of the heat transfer fluid stable. Specifically, when the weather is cloudy, due to insufficient sunlight, the solar energy received by the solar collectors is not enough to generate electricity, heat and supply hot water at the same time. Therefore, it is necessary to start the natural gas gas furnace to supplement the energy supply of the multi-generation system. At this time, the controller controls to open the passage of the three-way valve to the first heat transfer medium pipeline of the natural gas heat collection unit, and starts the gas furnace to provide energy for the natural gas heat collection unit through the heat generated by gas combustion. At this time, the natural gas heat collection unit and the solar heat collection unit jointly supply energy to generators and heating equipment. Although it is shown as one heat collection unit in Fig. 1 for convenience, it can actually mean two or three separate heat collection units, one of which is a natural gas heat collection unit and the other is a solar heat collection unit. If required, a geothermal heat collection unit can be provided.

To sum up, the multi-source multi-generation system of the present disclosure uses solar energy as the main source during the day when the sun is sufficient, and natural gas as an auxiliary to supply power, cooling, heating and hot water to the system. Although the heat transfer medium of the heat collection unit can directly enter the heat storage unit, alternatively, as shown in Figure 1, solar energy heats the heat transfer medium, and the heated heat transfer medium can be used to generate electricity through power generation equipment , the heat transfer working medium through the power generation equipment enters the heat storage unit to exchange heat with the phase change energy storage material in it, and then returns to the heat collector to regain the energy released by solar energy or natural gas combustion. When the sunlight is weak, start the natural gas heater to auxiliary heat the heat transfer medium to maintain the stability of the system output.

In addition, if the air temperature is lower than the predetermined temperature threshold, the controller can also directly shut down the power generation device and the refrigeration device and turn on the mains switch, so as to supply power to the electrical equipment through the mains. For example, when the sun is not enough at night or the weather is cloudy or rainy, the input of solar energy is very small, the utilization value is not high, the power generation equipment and refrigeration equipment stop working, and the local power grid or backup power supply supplies power and cooling to the system . At the same time, the input of natural gas is increased to maintain the functions of the system for heating and domestic hot water.

The above descriptions of the specific embodiments of the present disclosure are only for helping to understand the utility model concept of the present disclosure, which does not mean that all applications of the present disclosure can only be limited to these specific specific embodiments. Those skilled in the art should understand that the specific implementation manners described above are just some examples of various preferred implementation manners. Any specific implementation manner embodying the claims of the present disclosure shall be within the protection scope of the claims of the present disclosure. Those skilled in the art can modify the technical solutions described in the above specific implementation manners or equivalently replace some of the technical features. Any modification, equivalent replacement or improvement made within the spirit and principle of the present disclosure shall be included in the protection scope of the claims of the present disclosure.

Claims (10)

1. A multi-source multi-generation system, comprising: A plurality of energy supply source units, including at least a solar heat collection unit, a natural gas heat collection unit and an external power supply, wherein the solar heat collection unit is arranged at the light collection point to collect the thermal energy of the sunlight collected by the light collection unit, thereby Heating the liquid metal in the solar heat collection unit, and making the liquid metal flow in the first heat transfer medium pipeline through the liquid metal pump arranged at the liquid metal inlet or outlet of the solar heat collection unit, the natural gas heat collection unit Arranged in the gas furnace, the heat released by the combustion of natural gas is collected to heat the liquid metal flowing through the liquid metal chamber of the natural gas heat collection unit, and the liquid metal pump arranged at the liquid metal inlet or outlet of the natural gas heat collection unit makes the The liquid metal flows in the first heat transfer medium pipeline, and the external power supply unit is connected to the external mains and connected to various electrical equipment through a power switch; The power generation device performs thermoelectric conversion based on receiving the heat in the first heat transfer working medium pipeline, and transmits the generated electric energy to a plurality of electrical equipment; The heat storage unit stores the heat from the liquid metal flowing in the first heat transfer medium pipeline; Refrigerating equipment, which utilizes the heat brought by the heat transfer working medium flowing through the second heat transfer working medium pipeline of the heat storage unit to perform refrigeration; and The heating and hot water supply unit uses the third heat transfer working medium pipeline passing through the heat storage unit to heat the water in the third heat transfer working medium pipeline, thereby performing heating and hot water supply. 2. The multi-source multi-generation system according to claim 1, wherein the heat storage unit is a phase change heat storage, wherein a phase change energy storage material is contained, and the liquid metal pipeline passes through the phase change An energy storage material, so that excess heat is stored in the phase change energy storage material. 3. The multi-source multigeneration system according to claim 2, wherein the power generation device is a Stirling generator or a turbo generator. 4. The multi-source multi-generation system according to claim 1, wherein the solar heat collection unit can be a trough solar collector, a butterfly solar collector, or a tower solar collector. 5. The multi-source multi-generation system according to claim 1, further comprising the first heat transfer working medium pipeline arranged on the solar thermal collector and the first heat transfer working medium pipe of the natural gas heat collection unit The three-way valve and controller at the intersection of roads, when the illuminance is lower than the predetermined threshold, the controller starts the natural gas gas furnace and opens the three-way valve on the first heat transfer medium pipeline leading to the natural gas heat collection unit, so that Supplementary heating of the first heat-transfer working medium is carried out by burning natural gas to keep the temperature and carrying energy of the heat-transfer working medium stable. 6. The multi-source multi-generation system according to claim 5, wherein the controller also directly shuts down the power generation device and the refrigeration device and turns on the mains switch when the air temperature is lower than a predetermined temperature threshold, and the mains power is used for electrical appliances. The device is powered. 7. The multi-source multi-generation system according to claim 1, wherein the liquid metal is a gallium-based alloy or a lead-bismuth alloy. 8. The multi-source multi-generation system according to claim 1, wherein the part of the third heat transfer working fluid pipeline outside the heat storage unit is a casing structure, and the inner pipe is filled with the third heat transfer medium. The interlayer between the outer tube and the inner tube is filled with flowing water, and the outer wall of the outer tube has a thermal insulation layer. 9. The multi-source multigeneration system according to claim 1, wherein the refrigeration equipment is an absorption refrigeration equipment. 10. The multi-source multigeneration system according to claim 2, wherein the phase change energy storage material is molten salt.