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MXPA04012100A - Method and device for converting thermal energy into kinetic energy. - Google Patents

Method and device for converting thermal energy into kinetic energy.

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Publication number
MXPA04012100A
MXPA04012100A MXPA04012100A MXPA04012100A MXPA04012100A MX PA04012100 A MXPA04012100 A MX PA04012100A MX PA04012100 A MXPA04012100 A MX PA04012100A MX PA04012100 A MXPA04012100 A MX PA04012100A MX PA04012100 A MXPA04012100 A MX PA04012100A
Authority
MX
Mexico
Prior art keywords
chamber
motor
regenerator
compression
machine
Prior art date
Application number
MXPA04012100A
Other languages
Spanish (es)
Inventor
Engelhart Klaus
Original Assignee
Donauwind Erneuerbare Energieg
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from AT8432002A external-priority patent/AT500640B1/en
Application filed by Donauwind Erneuerbare Energieg filed Critical Donauwind Erneuerbare Energieg
Publication of MXPA04012100A publication Critical patent/MXPA04012100A/en

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02GHOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
    • F02G1/00Hot gas positive-displacement engine plants
    • F02G1/04Hot gas positive-displacement engine plants of closed-cycle type
    • F02G1/043Hot gas positive-displacement engine plants of closed-cycle type the engine being operated by expansion and contraction of a mass of working gas which is heated and cooled in one of a plurality of constantly communicating expansible chambers, e.g. Stirling cycle type engines

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Engine Equipment That Uses Special Cycles (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)

Abstract

The invention relates to a method and a device for converting thermal energy into kinetic energy, in which a working medium undergoes changes in the state thereof in at least one working space that is separated by means of a displacing element. The working medium flows back and forth between at least two closed working spaces (1, 2). The working medium is directed between the working spaces (1, 2) via a working machine (12) so as to deliver effective work. The working medium then flows from one side of the displacing element (3, 4) to the other side thereof via the regenerator (6, 7) by means of the displacing element (3, 4). The flow of the working medium is controlled via control members, particularly valves (13, 23, 24, 25, 26) while each displacing element (3, 4) is moved via a drive unit (5).

Description

METHOD AND DEVICE FOR THE TRANSFORMATION OF THERMAL ENERGY IN KINETIC ENERGY DESCRIPTION The invention relates to a method for transforming thermal energy into kinetic energy, whereby a motor fluid passes through the process in the following state changes in at least one separate motor chamber by means of a displacer: Compression, preferably isothermal compression, with heat dissipation in a compression chamber - heat absorption, preferably isochoric heat absorption in a regenerator during the transfer of the motor fluid from the compression chamber to an expansion expansion chamber, preferably isothermal expansion, with heat input into the chamber of expansion with dissipation of effective work - heat dissipation, preferably isochoric heat dissipation, in the regenerator during the transfer back to the compression chamber. The invention also relates to a device for carrying out the method. Energy can not be "produced" in the sense of creating new. Energy is present in nature in the most varied forms, however, not all forms of present energy can be used with equal ease for human needs. One can, for example, make very good use of the energy in wood for heating, but it is relatively difficult to produce light or cold for the radiator, etc. Although there are, for very specific applications, almost ideal forms of energy access, such as oil for cars or natural gas for industrial heating, from the human point of view, universally usable energy is universal. the electric energy. But this practically does not exist in nature in form, as we know it. This means that a form of accessible energy must first be transformed into electrical energy, most of the time going through several stages and with different degrees of efficiency. If you take, for example, energy resources such as coal, natural gas and oil that have stored solar energy for millions of years in chemical form, for the generation of electrical energy, then three transformation processes are required for this and corresponding industrial facilities . First, the stored chemical energy is transformed by combustion into heat. With heat, high-voltage steam is generated, which transforms heat into motion energy, ie kinetic energy, in the steam turbine. The steam turbine drives the generator, by which the kinetic energy is finally transformed into electrical energy. Each of these energy transformations has a certain degree of efficiency, that is, each time energy is lost and the degree of total effectiveness is correspondingly low. In this way, only about 40% of the energy stored in coal, natural gas and oil can be transformed into electrical energy. The remaining 60% is lost in the form of so-called heat lost for use in the form of electric current. Also in other transformation processes, such as in the transformation of chemical energy in oil to obtain kinetic energy for the drive of cars, ships, railroad or also airplanes, the degree of efficiency is not better, even though the chain of transformation is shorter. If you now take into account the huge amounts of electric current that are consumed throughout the world, then recognize the gigantic amounts of energy that can not be exploited and that are lost. If the loss of primary energy is not usable for the transformation into electrical energy in case it is a serious problem, precisely due to the waste of limited resources, then the contamination of the environment, which is inseparably linked with the transformation of chemical energy by combustion in thermal energy, is even more serious for future generations, as shown by climate changes due to greenhouse gases, such as, for example, the problem of C02. It is not surprising, therefore, that humanity has made attempts, for decades, to improve and optimize the transformation processes, respectively, also to take advantage of lost heat, for example, for heat at a distance. The use of a part of the heat lost from thermoelectric plants for residential heating already represents an important contribution to increase the degree of efficiency during the transformation. Also the other efforts to transform other forms of energy, such as wind energy or solar energy, into electrical energy are showing first results. Also very promising are the attempts to reduce the chain of transformation through different transformation processes and thus improve the overall degree of efficiency. An interesting transformation process has been carried out in the Stirling engine. The Stirling engine can transform thermal energy directly into kinetic energy without "deviation" by the steam. The Stirling engine is, after the steam engine, the second-oldest thermal machine, that is, a machine that can transform thermal energy into kinetic energy. And despite the fact that the Stirling engine, by its principle, has an efficiency level that is significantly higher than the steam engine and the petrol engine, respectively, Diesel, it has not achieved a greater application to date. While the diesel engine and diesel engine respectively have been continuously refined to achieve, in addition to a satisfactory service life above all power densities with considerably improved efficiency levels, the Stirling engine almost fell into oblivion. Only in recent times is increasing interest in increasing degree thanks to its lower pollution and the independence of the heat source. It suffers, however, from a need for considerable recovery in terms of research and development, to achieve a "degree of maturity" similar to modern steam engines or the gasoline engine in the car. Great development work is necessary, for example, to bring the degree of efficiency of a Stirling engine closer to the ideal Stirling engine efficiency level that is identical to that of the Carnot cycle.
For an eventual mobile application, work must be done, above all, on the increase of the power density and on the improvement of the dynamic behavior during rapid changes of load. The most important advantages of the Stirling engine compared to conventional thermal machines are, even though these could not always be performed satisfactorily due to the delay in their development: 1. Operates with arbitrary heat sources such as, for example, solar heat or process, burning of biomass, gas from deposits or other combustible waste to garbage, etc .; 2. Continuous supply with heat, that is, combustion under optimal conditions is feasible, so that the exhaust gas contains few harmful substances; 3. Closed circuit - it is not necessary to renew the motor fluid continuously; 4. Thanks to the conduction of the thermodynamically favorable process, high efficiency levels can be expected - even in the partial load region; 5. great smoothness of walking and low noise level. Three types of Stirling engines are currently distinguished by their type of construction: type a, type ß and type y. These types of Stirling engines differ in the first place by the functional principle and the constructive realization. The ideal Stirling process corresponds to a Carnot process and has a very high degree of efficiency. In practice, however, it is not possible to achieve an exact transformation, that is, an exact imitation of the ideal or best theoretical process. In the machines made, a series of deviations must be accepted due to the constructive possibilities, which has a negative effect on the degree of efficiency and power density. Thus, it has not been possible to carry out in Stirling engines, respectively made up of isochoric heat absorption or isochoric heat dissipation, nor isothermal compression respectively isothermal expansion. The main reasons for this are in the first place the inevitable dead spaces and the continuous volume change instead of discontinuous. The movement of the pistons and displacers is done by means of crank mechanisms with flying discs, so that an inversion of the movement is made in the dead points, but not a momentary stop as required by the theoretical process. The three types, machine a, ß and?, Correspond to the three constructive solutions developed so far in principle, to be able to imitate the ideal Stirling process, as far as possible, in the machines made. In machine a, two pistons are used in separate cylinders, one piston being disposed in the hot expansion chamber and the other piston in the cold compression chamber. Both pistons work, depending on the working stage respectively of the crankshaft angle, or drive piston and then again displacer. The major disadvantage of engines is the piston seal in the hot expansion chamber, which severely limits the service life of the engine, for which a satisfactory solution has not been developed to date. Another disadvantage is the crank mechanism with the deviation of the theoretical process, caused by it, respectively the low degree of efficiency. Up to now, a series of different arrangements of the cylinders have been developed between each other, as in parallel, aligned in opposition, parallel in opposition, cylinders in V or the rotating cylinder of Finkelstein, etc., which all work the same and have the same. same weak points, respectively the same low degree of efficiency. In the machine ß, a piston and a displacer are used, being that both the piston and the displacer are installed in the same cylinder. For the complicated movement course of piston and displacement piston, which sometimes come close together, then move in the same direction, for example towards the crankshaft, or the one stands still or should stay still, while the other moves, a complex drive is required, for example, a rhombic drive. The bst disadvantage of the ß machines is, similarly to the motors a, that the shutters slide dry. In addition, the course of movements of piston and displacer that, even with the complicated drive acts as a crank machine and that has, therefore, dead spots with reversal of movement, but not true arrest. Also in the case of type ß, the degree of efficiency actually achieved by Stirling machines is far from the efficiency level of the ideal Stirling process. Another important advantage of the ß machines is the complicated sealing system for the displacement rod in the compression piston. Due to the arrangement of piston and displacer in the same cylinder, the displacement rod passes through the compression piston. Also for ß machines, a series of different modalities have been developed up to now, such as Rankine-Napie or Philips, without being able to influence the disadvantages of the ß-machine. In the machine?, The piston and the displacer are arranged in separate cylinders. This avoids the complex sealing system of the displacement rod in the compression piston. But this increases the dead volume harmful to the degree of efficiency. The bst disadvantages of machines? the dry-running seals of the drive piston have already been described for machines a and ß. In addition, the course of movement of piston and displacer due to the drive by crankshaft respectively the crankshaft-like drive, which makes a good approximation to the ideal Stirling process in machines made impossible. Therefore, also the machine? It has a degree of efficiency essentially inferior to the ideal Stirling process. Another big disadvantage of the machines? it is the highest dead volume, which has an additional negative effect on the degree of efficiency, as well as the relatively low compression ratio obtainable, so that only small volume yields can be achieved. In addition to the single-action machines described, double-acting Stirling machines, particularly of type a, have also been developed and produced. It is known, for example, the engine of Franchot-Stirling. In this engine, in the space above both pistons, but also below the pistons, Stirling processes are developed, that is, both cylinders perform simultaneously with the upper respectively lower side of the piston, always two different stages with two different ones. Stirling processes. The two pistons and the associated cylinders define in this four variable volumes that can be considered in pairs as two separate machines. As with single-acting machines, the expansion piston and the compression piston must have a state shift of approximately 90 °. The degree of efficiency of double-acting machines, such as the Franchot-Stirling engine, is no better than that of single-action machines. Also the disadvantages and the serious problems are the same. Only the volume performance can improve thanks to the more compact construction. Known is also the Siemens-Stirling engine that represents with a discretionary amount of cylinders the standard configuration of most Stirling engines of greater power, such as the 4-95 engine of United Stirling with a power of approximately 52 kW. Also this modality has been developed some constructive types as, for example, the disposition of the cylinders in line, like "U", like "V", in rectangle or in circle. However, in the case of the Siemens-Stirling engine, a heater, regenerator and radiator arrangement has been selected in such a way that the sealing of the piston in the wall of the housing is in the cold part, the main disadvantages of the machines are they are still present. Tests are also known to perform the principle of the Stirling engine with free piston arrangements or as a rotary piston engine., ankel system. An improvement in the degree of efficiency has not resulted from any of the modalities, but on the contrary, in addition to lower degrees of efficiency compared to the machine, the disadvantages and problems increased. Common to all these Stirling motors are the additional advantages of dead spaces in heat exchangers, regenerators, circulation pipes, which reduce the proportion of pressure additionally and with this the degree of efficiency. The object of the invention is to create a method of the aforementioned type which avoids, on the one hand, the preceding disadvantages and which allows, for the first time, to realize a Stirling engine in such a way, on the other, that its way of working can be To approximate much more, than until now, to the ideal Stirling process. The object is achieved by the invention. The inventive method is characterized in that the motor fluid flows back and forth between at least two closed motor chambers, being that for the effective dissipation of work, the motor fluid is guided between the motor chambers through a motor machine, the Heat absorption is done before the drive machine and heat dissipation after the drive machine, and that the drive fluid is compressed after the heat dissipation in the drive chamber and then flows through a shifter on one side, passing through the regenerator, towards the other side of the displacer, being that the flow of the motor fluid is controlled by control organs, particularly valves, and that each displacer is moved by a drive. With the invention it is possible for the first time to achieve an efficiency level significantly higher than with all Stirling engines made so far. The greater degree of efficiency is due, in the first place, to the better adaptation of the work process carried out to the theoretical circular process, which is achieved by the inventive method. Thanks to the temperature difference of the motor fluid in both coupled motor chambers and the resulting pressure differences, this flows into the cold motor chamber and thus produces work through a motor machine. The equilibrium state resulting from this is due to the fact that most of the motor fluid is in the cold motor chamber. In the next stage of isochoric regenerator, under heat supply, the pressure difference is generated again in the motor chambers in the form of mirror symmetry and is again transformed into work by a motor machine. This behavior shows analogy with an oscillatory circuit and allows with the same degree of efficiency of Carnot a greater density of power referred to the amount of the motor fluid, than in the ideal theoretical Stirling process. According to a particular embodiment of the invention, the motor chamber is divided by the displacer into a double acting motor chamber. With this, the process can proceed more quickly by eliminating driving distances. In addition, any seals are eliminated in comparison with a buffer chamber otherwise required. According to a particular characteristic of the invention, each displacer is moved by its own drive. According to this characteristic of the invention, there are no crank machines or similar drives that are the main responsible for the poor approximation of the processes carried out by the ideal Stirling process. Instead of the crank machines, a linear drive is used which can be controlled independently of other movements, so that a discrete number and extension of stopping intervals, for example, of the displacers, are achieved. According to another embodiment of the invention, the displacers of the coupled motor chambers are moved by a rigid connection by means of a drive. This achieves a simpler construction, where, for example, two hot or cold motor chambers are coupled together. This allows a complete immersion of the hot-warm motor chambers in the heat source, as well as the immersion of the cold-cold moving chambers in the cold source without suffering in this the losses by the conduction of heat between the hot and cold source medium. The two displacers are joined together by a rigid rod that receives the forces acting between the displacers. To move the displacers, it is only necessary to overcome the friction resistance and the circulation losses. The regenerators can also be located inside or outside the connecting rod. There is no need to plug the same rod. The theoretical power density, referred to the amount of motor fluid, is greater than in the ideal Stirling process. This embodiment allows the use of low temperature for the production of current and also the production of cold. According to a particular embodiment of the invention, the motor chamber is divided by the displacer into an expansion chamber and a compression chamber, since the motor fluid used for the effective work flows, after leaving the expansion chamber, through the regenerator. associated with this motor chamber for the dissipation of effective work by the motor machine and, after the motor machine, eventually decoupling cold, to the compression chamber of the coupled motor chamber and then flows, thanks to the movement of the displacer, from the side of compression through the regenerator associated with this motor chamber to the expansion chamber of this same motor chamber. This conditioning is the so-called "cold" engine. The motor machine can be simple to execute, since it is not exposed to high temperature loads. In addition, cold can occur, thanks to the expansion of the motor fluid cooled by the regenerator, which is used, if necessary, with the help of a heat exchanger before entering the cold working region. The degree of efficiency and power density are higher than those of the Stirling type? Engine, which has the drive piston attached to the cold side by means of a flange. According to another embodiment of the invention, the motor chamber is separated by the displacer in an expansion chamber and a compression chamber, where the motor fluid used for the effective work flows, possibly through a heater, through the motor machine and flows then by the regenerator and possibly by a compressor, optionally by another radiator, to the compression chamber of the coupled motor chamber and then flows, thanks to the movement of the displacer, of the compression side through the regenerator associated with this motor chamber to the expansion chamber of this. This mode is the so-called "hot" engine. The degree of theoretical efficiency of this type is close to the efficiency degree Carnot, the power density, referred to the amount of motor fluid, is higher than that of the Stirling process. According to yet another embodiment of the invention, the motor chamber is divided by the displacer into two respectively two compression expansion chambers, wherein the motor fluid used for the effective work flows after leaving an expansion chamber for the regenerator associated with it. this drive chamber for supplying effective work through the drive machine and flowing after the drive machine to the compression chamber of the coupled drive chamber and then, thanks to the displacement movement of the compression side through the regenerator associated with this chamber motor to the other chamber of expansion of the motor chamber. As already mentioned, this "low temperature" motor allows the use of low temperature for the generation of electrical energy and also to generate cold. According to another particular embodiment of the invention, the absorption of heat is carried out in isobaric form, particularly immediately before the driving machine. The essential advantage must be seen in that the temperature in the displacers is limited to the maximum temperature of regenerator, being that the regenerator temperature is below the heater temperature. According to an advantageous development of the invention, the compression is performed by pressure compensation and / or by a compressor. If the compression is performed exclusively by pressure compensation, then a rotary machine, ie the compressor, is suppressed. The process, surely, becomes simpler. By including a compressor you get an even higher degree of efficiency. It is, however, also the object of the invention to create a device for carrying out the inventive method. The inventive device for carrying out the method is characterized in that at least two closed motor chambers are provided, each motor chamber being divided into two sections by a movable displacer through a drive, one section comprising a heater and the other section one radiator and each motor chamber comprises a regenerator associated with it, both sections being connected to a regenerator and at least one section of each motor chamber is connected to a motor machine, with the section used for the subsequent dissipation of work effective is connected to the corresponding section of the other driving chamber and for control of the driving fluid, control elements, in particular valves, are being provided. As already mentioned in the foregoing, a higher power density is obtained by the inventive device. Another advantage of the inventive device must be seen in that the machine can be operated at a slow cycle. The motor chambers do not have real piston seals and evade the sealing problem, which occurs particularly with a larger piston volume. By overriding this problem, high-volume motor chambers can be used that can operate slowly and discontinuously. This achieves an approximation to an ideal Stirling process. Thanks to the slower cycle and with this greater periods of heat transition than in conventional Stirling engines, isothermal processes can be performed better. The large areas of heat transition in the motor chambers favor the use of biomass fuels. Another advantage can be found in the minimization of dead space. The dead space is the volume that does not participate in the thermodynamic process and that has, therefore, a harmful effect on the degree of efficiency. It arises, virtually, due to the sinusoidal movement of the motor piston and, really, by the volumes of the regenerator, of the heater pipe, etc., through which the motive fluid passes. Due to the proportion of the motor chambers and the proportionally small volume building elements in comparison, as a motive machine, regenerator, heater and radiator a favorable ratio of dead space to motive space is produced and is in a manifold below that of the machines currently built. The minimization of the driving forces is also advantageous. They are composed by the resistance to the circulation of isochoric displacement of the driving fluid inside the motor chambers, the actuation of the valves and possibly the compression of the driving fluid by a compressor. One of the main components is eliminated, the friction of piston rings that slide dry, along with the friction of the crank machine. To summarize, it can be stated that, thanks to the elimination of moved seals, exposed to temperature and that slide dry, which have represented, up to now, the main problem, it is possible to produce this motor by means of the standard construction technique. machinery. The division of motive chamber and motive machine allow the use of standard machinery elements. The generator is of smaller construction size, thanks to the high-speed drive machine. The removal of the mechanical drive unit further simplifies the construction. It is not necessary to synchronize the displacer with the driving machine, the optimum working point can be adjusted in each case separately. According to a particular feature of the invention, at least one control element, in particular a valve, is provided respectively in the connections between the drive machine and the individual sections. These serve to decouple the motor cycle and regenerative cycle. Instead of a distribution by valves, a slot distribution could also be used. According to another particular characteristic of the invention, four, six or more motor chambers are provided in even number, where two motor chambers are always coupled to each other. Thanks to the greater number of motor chambers, the ripple in the motor machine, caused by the process, decreases and the regenerative cycle can be extended in comparison with the motor cycle. According to a particular characteristic of the invention, the driving machine is a turbine, particularly an axial, radial or Tesla turbine. Due to the use of turbines it is possible to dispense with moved seals, exposed to dry sliding temperatures, which represent the main problem of Stirling engines operated with pistons. In the case of the disc turbine or Tesla, in particular a better expansion or isothermal compression is possible. According to an embodiment of the invention, the driving machine is a piston engine. This method has the advantage that it is cheap and can be carried out with standard construction elements. According to another embodiment of the invention, the driving machine is a screw motor. The screw motor offers, just like the turbine, the advantage of dispensable seals. According to a particular development of the invention, the drive for the displacer is a linear drive. The linear drive ensures acceleration and braking of the displacer with precise control. Thanks to this a discontinuous movement is possible, as it corresponds to the ideal thermodynamic process, with little loss. All the passages and, therefore, the seals for linkage or crank machine become dispensable. A possible rapid control of power is feasible at the moment by modifying the frequency of the displacer cycle without the need to induce it by modifying the upper temperature. With this it becomes possible an excellent command in the region of partial loads. According to another characteristic of the invention, the regenerator is possibly preceded or followed by a heater. The heater supplies, in addition to the heater head in the motor chamber, energy to the drive fluid in the motor chamber, thereby increasing the total reception area in the hot region. A particular embodiment variant of the invention is characterized in that the motor chamber is divided by the displacer into an expansion chamber and a compression chamber, that the expansion chamber is connected to the regenerator associated with this motor chamber and the regenerator with the machine motor, that the exhaust side of the driving machine is connected to the compression chamber of the other coupled motor chamber and that the compression chamber is connected, by means of the regenerator associated with this motor chamber, with the chamber of expansion thereof driving chamber, being that between regenerator and intake side of the driving machine and the exhaust side of the driving machine and compression chamber, two control elements, particularly valves, are being provided. Here, the advantages mentioned above in relation to the "cold" engine apply analogously. A particular embodiment of the invention is characterized in that the driving chamber is divided by the displacer into an expansion chamber and a compression chamber, that the expansion chamber is connected to the intake side of the driving machine and the driving machine with its side of exhaust through the regenerator and eventually by a compressor with the compression chamber of the other motor chamber coupled and this compression chamber is connected by a regenerator associated with this motor chamber with the expansion chamber of the same motor chamber, being that between control chamber and intake side of the driving machine and the exhaust side of the regenerator and compression chamber, two control elements, particularly valves, are being provided. Here, the advantages already mentioned in the foregoing about the "hot" engine apply analogously. Another alternative embodiment of the invention is characterized in that the driving chamber is divided by the displacer into respectively two expansion chambers respectively of compression, that each expansion chamber is connected by a regenerator to the intake side of the driving machine and the side of The exhaust of the driving machine is connected to the compression chamber of the other coupled motor chamber and this compression chamber is connected by a regenerator to the expansion chamber of the other motor chamber, with the regenerator connected to the chamber next to the chamber. of expansion and the intake side of the driving machine and the exhaust side of the driving machine and compression chamber are each providing control organs, particularly valves. Here, the advantages that have already been indicated in the preceding about the "low temperature" motor apply analogously. Of course, also the hot gases can be expanded, analogously to the working principle of the hot engine. Another embodiment of the invention is characterized in that a heater is arranged, in the flow direction, after the section that is connected to the driving machine. In this way higher temperatures are achieved by the driving machine, which produces a better power output. According to an advantageous development of the invention, the heater is arranged spatially separate from the section, for example in the combustion chamber of a heating boiler. Thus, only the elements of the installation used as heater absorb the maximum temperatures, so that only these elements must be dimensioned accordingly. The invention is explained more closely by exemplary embodiments which are depicted in the drawing. They show: Fig. 1 the device for the transformation of thermal energy into kinetic energy as a hot engine, Fig. 2 the device as a cold engine, Fig. 3 the device as a low temperature motor, Fig. 4 a mode of the device with heaters spatially separated and Fig. 5 a schematic of the operative method of the device.
By way of introduction it should be noted that in the described mode, respectively identical components are provided with the same reference symbol, respectively, designations of constructive elements, the manifestations contained in the entire description being analogously transferable to respectively identical elements with reference symbols same respectively designations of identical building elements. According to Fig.l, the device has, using a driving fluid for the transformation of thermal energy into kinetic energy, two closed motor chambers 1, 2, each motor chamber 1, 2 being divided by a mobile shifter 3, 4 at a time. sections, namely an expansion chamber and a compression chamber. Each displacer 3, 4 is movable by means of a drive, particularly by means of a linear drive 5. Each motor chamber 1, 2 comprises a regenerator 6, 7 associated therewith. Both sections of the motor chamber 1 respectively 2 are connected to this regenerator 6 respectively 7 by means of conduits 8, 9 respectively 10, 11. A section - in the case represented by the expansion chamber - of each camera 1, respectively 2 motor is connected to a motor machine 12. The expansion chamber used to supply the effective work of the motor chamber 1 is connected, after the motor machine 12, with the corresponding section - i.e. with the compression chamber - of the motor chamber 2. In order to control the driving fluid, control elements, particularly valves 13, are provided, which are arranged between the driving machine 12 and the individual sections of the motor-driven camera 1 respectively. Instead of valves 13, distribution slots can also be used. A turbine, particularly an axial or radial turbine, can be used as the driving machine 12. Of course, also a piston or worm motor is possible as a driving machine. The driving machine 12 is connected to the generator 18 by means of an arrow 17. The driving fluid passes through the ideal process in the following state changes: - isothermal compression with dissipation of heat in a compression chamber - isochoric heat absorption in a regenerator 6 respectively 7 during displacement of the driving fluid from the compression chamber to an expansion chamber - isothermal expansion under heat input in the expansion chamber with effective working dissipation - isochoric heat dissipation in the regenerator 6 respectively 7 during the displacement back to the compression chamber. In a general way, it can be pointed out that the driving fluid flows back and forth between two double-acting closed drive chambers 1, 2. For the dissipation of effective work, the driving fluid is guided between the motor chambers 1, 2 by a motor machine 12. Then, the driving fluid flows in the double acting chamber 1, 2 through the displacer 3 respectively 4 on one side through the regenerator 6 respectively 7 to the other side of the displacer 3 respectively 4, the flow of the driving fluid being controlled by valves 13 and each displacer 3, 4 is moved by a drive 5. As already mentioned, the device according to Fig. 1, also referred to as a 4-quadrant turbine, is designated as a "hot" engine, because the driving fluid is carried by the driving machine 12 in its maximum temperature state. The expansion chamber is connected to the intake side of the engine 12 and the engine 12 with its exhaust side by the regenerator 6 respectively 7 and by a compressor 19 with the compression chamber of the other motor chamber 2 coupled. This compression chamber is connected by the regenerator 7 associated with this driving chamber 2 to the expansion chamber of the same driving chamber 2, between the expansion chamber and the intake side of the engine 12 and the exhaust side of the regenerator 7. and respective compression valves are being provided. The regenerator 6 respectively 7 consists of a heater 14., a coupling regenerator 15 and a radiator 16, wherein the expansion chamber is connected to the heater 14 and the compression chamber with the radiator 16. Additionally, the regenerator 6 respectively 7 is divided in vertical direction into individual sectors. These sectors are correspondingly sealed together. In the inner sectors, the driving fluid flows from the driving machine 12 to the compressor 19 and the outer sectors serve for the regenerating cycle of the driving fluid. The expansion chamber is connected to the heater 14 associated with this motor chamber 1 and the regenerator 6 with the motor machine 12. The exhaust side of the driving machine 12 is connected by the radiator 16 to the compression chamber of the other driven camera 2 and this compression chamber is connected by the regenerator 7 associated with this driving camera 2 with the expansion chamber of the engine. the same 2 motor camera. Between the regenerator 6 respectively 7 and the intake side of the driving machine 12 and the exhaust side of the driving machine 12 respectively compressor 19 and compression chamber each valve 13 is provided. According to Fig. 2, the 4-quadrant turbine is marked as an engine nfr £ o. "The driving chamber 1, 2, again, is divided by the displacer 3, 4 in an expansion chamber and a compression chamber.In this case, the driving fluid used for the effective work flows after leaving the expansion chamber by the regenerator 6 associated with this motor chamber 1 for the dissipation of effective work by the driving machine 12 and after the driving machine 12 to the compression chamber of the coupled driving chamber 2. The driving fluid flows to continued by the movement of the displacer 4 on the compression side by the regenerator 7 associated with this motor chamber 2 to the expansion chamber of the same motor chamber 2. According to Fig. 3, The device is marked as a low temperature motor. In this, the displacers 3, 4 are moved by a rigid connection 20 by means of an actuator 5. The motor chamber 1, 2 is divided by the displacer 3, 4 into respectively two expansion chambers respectively compression. Each expansion chamber of the driving chamber 1 is connected by a regenerator 6, 7 to the intake side of the driving machine 12 and the exhaust side of the driving machine 12 to the compression chamber of the other driving chamber 2. This compression chamber is connected by means of the regenerators 6 respectively 7 to the expansion chamber of the other motor chamber 1, between the regenerator 6 respectively 7 connected after the expansion chamber and the intake side of the motor machine 12 and the exhaust side of the driving machine 12 and the compression chamber are provided with respective valves 13. The driving fluid used for the effective work flows, after leaving an expansion chamber by the regenerator 6 respectively 7 associated with this motor chamber 1, for the dissipation of effective work by the motor machine 12 and after the motor machine 12 to the compression chamber of the motorized chamber 2. The driving fluid then flows through the movement of the displacer 3 respectively 4 on the compression side through the regenerator 6 respectively 7 associated with this driving chamber 2 to the other expansion chamber of the driving chamber 1. To cool the motor chamber 2, this can be arranged, for example, on land. Additionally, the devices 3 respectively 4 can be realized as coupled membranes. According to Fig. 4, each motor chamber 1, 2 is divided by the displacer 3, 4 into an expansion chamber and a compression chamber. Each displacer 3, 4 is movable by means of a drive, particularly a linear drive 5. Additionally, each displacer 3, 4 is housed in a guide 22. Each drive chamber 1, 2 comprises a regenerator 6, 7 associated therewith. Both sections of the chamber 1 respectively 2 are connected to this regenerator 6 respectively 7 by means of piping. The expansion chamber is equipped, in addition, with an intermediate heater 21. This intermediate heater 21 can be realized as intermediate heater 21 in layers or be constructed in the form of a pack of lamellae. The compression chamber is provided with a radiator 16. The expansion chamber is optionally connected by the intermediate heater 21 with a heater 14 spatially separated. The heater 14 could be arranged in a heating boiler. Isobaric heating is carried out in the heater 14. The drive fluid flows from the heater 14 through the drive machine 12. The driving machine 12, preferably a Tesla turbine, is coupled by a direct arrow 17 with a generator 18. In summary, the operation is explained once again. The compressed driving fluid flows from the compression chamber of the motor chamber 1 through the associated regenerator 6 and the intermediate heater 21 to the expansion chamber of the same motor chamber 1 and is thus heat-sealed in an isochoric manner. The circulation of the flow occurs thanks to the movement of the displacer 3. After leaving the expansion chamber of the motor chamber 1, the driving fluid flows through the external heater 14, where an isobaric heat absorption is carried out, to the motor machine 12 . From the driving machine 12, the driving fluid flows through the regenerator 7 and the radiator 16 into the compression chamber of the driving chamber 2 and is compressed by the continuation of the flow or by a compressor in an isothermal form. The compression heat is dissipated in the radiator 16 of the driving chamber 2. By moving the displacer 4 in the driving chamber 2, the compressed driving fluid is carried through the regenerator 7 and the intermediate heater 21 into the expansion chamber of the driving chamber 2. After leaving the expansion chamber of the motor chamber 2, the motor fluid flows through the external heater 14, in which an isobaric heat absorption is carried out, to the motor machine 12. From the driving machine 12, the driving fluid returns to flow analogously to the compression chamber of the motor chamber 1. In principle, the motor fluid passes through a loop in the form of eight, with the motor machine 12 being provided in the center. The individual steps of the operation are controlled by the corresponding valves, not shown. According to Fig. 5, the operation mode of the device with valve control is described by means of a real example. In the motor chamber 1 with the displacer 3, the driving fluid has a temperature T0 of 530 ° C and a pressure P0 of 30 bar. In the motor chamber 2 with the displacer 4, a temperature Tu of 30 ° C and a Pu pressure of 10 bars apply. By means of the pressure difference generated in the displacer cycle between the driving chamber 1 and 2, valve 23 and 24 are opened in the direction of passage. The hot driving fluid at 530 ° C now flows from the driving chamber 1 through the valve 23 to the heater 14, where it is superheated to 630 ° C and then put into the driving machine 12 by polychromatic expansion again at 530 ° C . The driving fluid then comes through the valve 24 of the regenerator 7 where it is cooled to 60 ° C, the radiator 16, where it is cooled to 30 ° C, to the driving chamber 2. Valves 25 and 26 are in the closing direction with respect to the pressure difference and open only after the next regenerator cycle, that is, in the next work cycle. The regenerator cycle starts after the work cycle has generated a pressure compensation between the two motor chambers 1, 2; that is to say, the same pressure (average pressure) governs the entire system. The displacers 3, 4 now move to the opposite dead center positions and displace the drive fluid therein by the regenerator-radiator unit to the respective other side of the displacer 3, 4. The heating, respectively cooling, isochoric, which occurs in this, it causes a change in pressure in the respective motor chamber 1, 2; that is to say, when being transferred from the cold to the hot there is an increase in pressure, when going from heating to cold, there is a decrease in pressure. This completes the regenerator cycle and the pressure difference is used for the next work cycle. Finally, it is indicated by the good order that individual constructive elements or groups of construction are represented out of proportion and on a distorted scale, for a better understanding of the invention.

Claims (22)

  1. 37 CLAIMS 1. Method for the transformation of thermal energy into kinetic energy, being that a motor fluid passes during the process by the following changes of state in at least one motor chamber separated by a displacer: - Compression, preferably isothermal compression, with dissipation of heat in a compression chamber - heat absorption, preferably isochoric heat absorption in a regenerator during the transfer of the motive fluid from the compression chamber to an expansion-expansion chamber, preferably isothermal expansion, with heat input in the expansion chamber with dissipation effective working - heat dissipation, preferably isochoric heat dissipation, in the regenerator during the transfer back to the compression chamber, characterized in that the driving fluid flows back and forth between at least two closed motor chambers, being, for the dissipation of effective work, the motive fluid is carries between the motor chambers by a motor machine, where the heat absorption is done before the motor machine and the heat dissipation after the motor machine and the motor fluid is compressed after the heat dissipation in the motor chamber and that flows next through the 38 displacer on one side of the regenerator on the other side of the displacer, wherein the flow of the driving fluid is controlled by control organs, particularly valves and each displacer is moved by a drive. Method according to claim 1, characterized in that the motor chamber is separated by the displacer in a double acting motor chamber. Method according to claim 1 or 2, characterized in that each dissipator is moved by its own drive. Method according to claim 1 or 2, characterized in that the displacers of the coupled motor chambers are moved by a rigid connection or by means of a drive. Method according to one or more of claims 1 to 4, characterized in that the motor chamber is separated by the displacer in an expansion chamber and a compression chamber, where the motor fluid used for the effective work flows after leaving the chamber. expansion chamber, through the regenerator associated with this motor chamber for the dissipation of effective work through the motor machine and after the motor machine, eventually decoupling cold, to the compression chamber of the coupled motor chamber and then, due to the 39 movement of the displacer, flows from the compression side by the regenerator associated with this motor chamber to the expansion chamber of the same motor chamber. Method according to one or more of claims 1 to 4, characterized in that the motor chamber is divided by the displacer into an expansion chamber and a compression chamber, where the motor fluid used for the effective work flows, possibly by means of a heater , by a driving machine and then flows through the regenerator and eventually through a compressor, possibly through another radiator into the compression chamber of the coupled motor chamber and flows next due to movement of the displacer on the compression side by the regenerator associated with this motor camera to the expansion chamber of the same motor camera. The method according to one or more of claims 1 to 4, characterized in that the driving chamber is divided by the displacer into respectively two compression expansion chambers, respectively, wherein the driving fluid used for the effective work flows after leaving a chamber. of expansion by the regenerator associated with this motor chamber for the dissipation of effective work by the motor machine and flows after the motor machine to the compression chamber of the coupled motor chamber and flows to 40 continuation by movement of the displacer on the compression side by the regenerator associated with this motor chamber to the other chamber of expansion of the motor chamber. 8. Method according to one or more of claims 1 to 4 or x, and characterized in that the absorption of heat is carried out in isobaric form, particularly immediate, by the driving machine. Method according to one or more of claims 1 to 4 or x, and characterized in that the compression is carried out by pressure compensation and / or by a compressor. Device for carrying out the method according to one of claims 9, characterized in that at least two closed motor chambers are provided, each motor chamber being divided into two sections by a movable shifter, wherein one section comprises a heater and the another section a radiator and each drive chamber comprises a regenerator associated therewith and that at least one section of each drive chamber is connected to a drive machine, the section used for the subsequent dissipation of effective work being connected to the corresponding section of the other motor chamber and for the control of the motor fluid control elements are provided, in particular valves. Device according to claim 10, characterized in that in the connections between the driving machine 41 and the individual sections respectively at least one control member is provided, particularly a valve. 12. Device according to claim 10 or 11, characterized in that four, six or more motor chambers, in even quantity, are provided, wherein two motor chambers are always coupled to each other. Device according to one or more of claims 10 to 12, characterized in that the driving machine is a turbine, in particular an axial, radial or Tesla turbine. Device according to one or more of claims 10 to 12, characterized in that the driving machine is a piston engine. Device according to one of claims 10 to 12, characterized in that the drive machine is a screw motor. Device according to one or more of claims 10 to 15, characterized in that the drive for the displacer is a linear drive. Device according to one or more of Claims 10 to 16, characterized in that the regenerator is preceded by a heater and / or followed by a radiator. 18. Device according to one or more of the 42 claims 10 to 17, characterized in that the motor chamber is divided by the displacer into an expansion chamber and a compression chamber, because the expansion chamber is connected with the regenerator associated with this motor chamber and the regenerator with the motor machine, because the The exhaust side of the driving machine is connected to the compression chamber of the other coupled motor chamber and this compression chamber is connected by the regenerator associated with this motor chamber with the expansion chamber of the same motor chamber, being that between regenerator and the intake side of the driving machine and the exhaust side of the driving machine and compression chamber respectively a control member is provided, particularly a valve. Device according to one or several of claims 10 to 17, characterized in that the motor chamber is divided by the displacer into an expansion chamber and a compression chamber, because the expansion chamber is connected to the intake side of the motor machine and the drive machine with its exhaust side is connected by the regenerator and eventually by a compressor with the compression chamber of the other driven motor chamber and that this compression chamber is connected by the regenerator associated with this motor chamber with the chamber of expansion of the same camera 43 motor, being that between the expansion chamber and the intake side of the driving machine and the exhaust side of the regenerator and compression chamber respectively a control member is provided, particularly a valve. Device according to one of claims 10 to 17, characterized in that the driving chamber is divided by the displacer into respectively two expansion chambers respectively compression, because each expansion chamber is connected by a regenerator with the intake side of the driving machine and the exhaust side of the driving machine with the Compression chamber of the other motor chamber coupled and this compression chamber is connected by a regenerator to the expansion chamber of the other motor chamber, being that between the regenerator placed after the expansion chamber and the intake side of the machine motor and the exhaust side of the driving machine and the compression chamber respectively a control member is provided, particularly a valve. Device according to one or more of Claims 10 to 17, characterized in that a heater is provided in the flow direction after the section which is connected to the drive machine. 22. Device according to claim 21, characterized in that the heater is arranged 44 spatially separated from the section, for example combustion chamber of a heating boiler.
MXPA04012100A 2002-06-03 2003-06-02 Method and device for converting thermal energy into kinetic energy. MXPA04012100A (en)

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AT8432002A AT500640B1 (en) 2002-06-03 2002-06-03 Method of converting thermal into kinetic energy involves feeding working fluid between two working spaces
AT7672003A AT500641B8 (en) 2002-06-03 2003-05-19 METHOD AND DEVICE FOR CONVERTING HEAT ENERGY IN KINETIC ENERGY
PCT/AT2003/000160 WO2003102403A1 (en) 2002-06-03 2003-06-02 Method and device for converting thermal energy into kinetic energy

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DE102007039517B4 (en) 2007-08-21 2010-04-29 Waechter-Spittler, Freiherr von, Hartmut Rotating reciprocating engine
JP5317942B2 (en) * 2009-12-07 2013-10-16 横浜製機株式会社 External combustion type closed cycle heat engine
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US334153A (en) * 1886-01-12 George h
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US3248870A (en) * 1960-07-29 1966-05-03 Morgenroth Henri Stirling cycle engine divided into a pressure generating unit and energy converting unit
US3678686A (en) * 1970-02-20 1972-07-25 Atomic Energy Commission Modified stirling cycle engine-compressor having a freely reciprocable displacer piston
DE2402289C2 (en) * 1974-01-18 1984-08-02 M.A.N. Maschinenfabrik Augsburg-Nürnberg AG, 8900 Augsburg Multi-cylinder hot gas piston machine
US4012910A (en) * 1975-07-03 1977-03-22 Mark Schuman Thermally driven piston apparatus having an angled cylinder bypass directing fluid into a thermal lag heating chamber beyond the bypass

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AU2003237553A1 (en) 2003-12-19
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EP1509690B1 (en) 2005-10-05

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