CN213540641U - Thermo-acoustic power generation system utilizing cascade heat energy and cascade cold energy - Google Patents
Thermo-acoustic power generation system utilizing cascade heat energy and cascade cold energy Download PDFInfo
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- CN213540641U CN213540641U CN202022232758.1U CN202022232758U CN213540641U CN 213540641 U CN213540641 U CN 213540641U CN 202022232758 U CN202022232758 U CN 202022232758U CN 213540641 U CN213540641 U CN 213540641U
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Abstract
The utility model provides a thermoacoustic power generation system utilizing step heat energy and step cold energy, wherein the thermoacoustic power generation loop comprises at least two groups of thermoacoustic power generation units and a connecting pipe connected with the thermoacoustic power generation units; each group of thermoacoustic power generation units comprises a linear motor and a thermoacoustic engine, the linear motor is connected with the thermoacoustic engine through a connecting pipe, and the thermoacoustic engine is connected with the adjacent thermoacoustic power generation units in the thermoacoustic power generation loop through the connecting pipe; the thermoacoustic engine comprises a first room temperature heat exchanger, a second room temperature heat exchanger and at least two groups of thermoacoustic components which are arranged between the first room temperature heat exchanger and the second room temperature heat exchanger in parallel; the low-temperature cold energy supply system is sequentially connected in series with the thermoacoustic components arranged in parallel, and a low-temperature end with the temperature distributed in a step shape is formed at one end of the thermoacoustic component; the low-grade heat energy supply system is sequentially connected in series with the thermoacoustic components arranged in parallel, and a high-temperature end with the temperature distributed in a gradient manner is formed at the other end of each thermoacoustic component. The utility model discloses a heat sound technique realizes cold energy recovery and waste heat utilization.
Description
Technical Field
The embodiment of the utility model provides an relate to energy technical field, especially relate to an utilize thermoacoustic generating system of step heat energy and step cold energy.
Background
The potential crisis of energy and the deterioration of ecological environment make countries in the world actively develop and utilize low-grade heat energy. Natural gas is an important component of energy consumption in today's world. The LNG obtained after the natural gas is liquefied at low temperature has the volume of only 1/625 of the original volume, so that the natural gas is convenient to store and transport. During storage and transportation, the LNG is maintained in a low-temperature environment of 110K and 0.1 MPa. If natural gas is used, it is generally necessary to first vaporize the LNG. In the gasification process, a large amount of cold energy is released from the LNG, and if the released cold energy is directly discharged to the environment, the cold energy is wasted. Meanwhile, a large amount of low-grade waste heat is frequently generated in the industry, and the part of waste heat is difficult to utilize under a common method, can only be directly discharged into the environment and cannot be effectively utilized.
At present, the thermoacoustic generator is a good choice for cold recovery and low-grade waste heat utilization. The thermoacoustic generator is an energy source device based on thermoacoustic effect, mainly comprising thermoacoustic engine and linear motor, in which the thermoacoustic engine can be used for creating sound field by means of pipeline and heat exchanger, and utilizing the interaction of working medium gas and solid filler in the heat regenerator to convert external heat energy into sound energy. The sound energy generated by the thermoacoustic engine is transmitted to the linear motor, and the linear motor converts the sound energy into electric energy, thereby realizing cold energy recovery and waste heat utilization. The thermoacoustic generator has the advantages of high reliability, long service life and low maintenance cost, and has higher potential power generation efficiency, thereby having very high market potential and development prospect.
Embodiments of the present invention are provided in view of this.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a aim at solving one of the technical problem that exists among the prior art at least. Therefore, the embodiment of the utility model provides an utilize heat sound power generation system of step heat energy and step cold energy for how to carry out cold volume recovery and low-grade waste heat utilization's problem among the solution prior art, adopt the heat sound engine to pass through pipeline and heat exchanger and establish the sound field, and utilize working medium gas and solid filler interact in the regenerator, convert external heat energy into sound energy. The sound energy generated by the thermoacoustic engine is transmitted to the linear motor, and the linear motor converts the sound energy into electric energy, thereby realizing cold energy recovery and waste heat utilization.
According to the utility model discloses utilize thermoacoustic generating system of step heat energy and step cold energy, include: the system comprises a thermoacoustic power generation loop, a low-temperature cold energy supply system and a low-grade heat energy supply system;
the thermoacoustic power generation loop comprises at least two groups of thermoacoustic power generation units and connecting pipes connected with the thermoacoustic power generation units;
each group of thermoacoustic power generation units comprises a linear motor and a thermoacoustic engine, the linear motor is connected with the thermoacoustic engine through the connecting pipe, and the thermoacoustic engine is connected with the adjacent thermoacoustic power generation units in the thermoacoustic power generation loop through the connecting pipe;
the thermoacoustic engine comprises a first room temperature heat exchanger, a second room temperature heat exchanger and at least two groups of thermoacoustic assemblies which are arranged between the first room temperature heat exchanger and the second room temperature heat exchanger in parallel;
the low-temperature cold energy supply system is sequentially connected in series with the thermoacoustic components arranged in parallel, and a low-temperature end with the temperature distributed in a gradient manner is formed at one end of each thermoacoustic component;
the low-grade heat energy supply system is sequentially connected in series with the thermoacoustic components arranged in parallel, and a high-temperature end with the temperature distributed in a gradient manner is formed at the other end of the thermoacoustic component.
According to an embodiment of the present invention, the thermo-acoustic assembly includes a first thermal buffer tube, a low temperature end heat exchanger, a heat regenerator, a high temperature end heat exchanger, and a second thermal buffer tube, which are sequentially disposed from the first room temperature heat exchanger to the second room temperature heat exchanger;
the low-temperature cold energy supply system is connected with the low-temperature end heat exchanger, and the low-grade heat energy supply system is connected with the high-temperature end heat exchanger.
Particularly, the low-temperature cold energy supply system is connected with the low-temperature end heat exchanger, energy conversion of the low-temperature cold energy and the low-temperature end heat exchanger is achieved, the low-temperature cold energy is connected with the low-temperature end heat exchanger in series, the low-temperature cold energy absorbs heat step by step to increase the temperature, and a gradient cold energy distribution interval is formed in the low-temperature end heat exchanger.
Furthermore, the low-grade heat energy supply system is connected with the high-temperature end heat exchanger, so that energy conversion of low-grade heat energy is realized, the low-grade heat energy is connected with the high-temperature end heat exchanger in series, the heat of the low-grade heat energy is gradually absorbed, the temperature is reduced, and a gradient heat energy distribution interval is formed in the high-temperature end heat exchanger.
It should be noted that, by arranging a plurality of low-temperature heat exchangers connected in parallel with the low-temperature cold energy supply system and a plurality of high-temperature heat exchangers connected in parallel with the low-grade heat energy supply system, recycling of all cold energy and heat energy from the low-temperature region to the high-temperature region is realized.
According to an embodiment of the present invention, the cold energy provided by the low-temperature cold energy supply system sequentially enters the thermoacoustic engine from the low-temperature end heat exchangers arranged in parallel;
the heat energy provided by the low-grade heat energy supply system sequentially enters the thermoacoustic engine from the high-temperature end heat exchangers arranged in parallel;
the direction of the cold energy provided by the low-temperature cold energy supply system entering the thermoacoustic engine is opposite to the direction of the heat energy provided by the low-grade heat energy supply system entering the thermoacoustic engine.
Specifically, the opposite orientation allows the temperature differential to be substantially the same for each thermoacoustic assembly, such that the output of each thermoacoustic assembly is stable.
According to the utility model discloses an implement mode of embodiment, the cold energy that low temperature cold energy supply system provided loops through every the low temperature end heat exchanger heats up to the room temperature after carrying out the heat exchange.
Specifically, after the low-temperature cold energy is heated to the room temperature, on one hand, the energy released by the cold energy is recycled, and on the other hand, a heat exchange scheme is provided for the utilization of the cold energy returning to the room temperature.
According to the utility model discloses an implementation of embodiment, the cold energy that low temperature cold energy supply system provided comes from liquefied natural gas or liquid nitrogen.
Specifically, the cold energy in the liquefied natural gas or the liquid nitrogen is released, so that the recovery of the cold energy is realized, and the use of the natural gas and the nitrogen is realized.
According to the utility model discloses an implement mode of embodiment, the heat energy that low-grade heat energy supply system provided loops through every high temperature end heat exchanger cools down to the room temperature after carrying out the heat exchange.
Specifically, after the low-grade heat energy is cooled to the room temperature, pollution-free emission is realized.
According to an embodiment of the present invention, the heat energy provided by the low-grade heat energy supply system is derived from solar energy or industrial waste heat.
Specifically, embodiments of utilizing solar energy or industrial waste heat are proposed.
According to an embodiment of the present invention, the linear motor includes a support structure, a mover, a stator, a piston, and a load;
the support structure is arranged as a shell of the linear motor;
the piston is arranged in the supporting structure and is connected with the rotor;
the stator is wound outside the rotor;
the load is connected with the piston;
wherein the load is a resistor and/or a power grid.
Specifically, the linear motor can convert acoustic power into electric power for output, and the piston in the linear motor can adjust impedance to realize acoustic impedance matching between the linear motor and the thermoacoustic engine unit, so that high thermoelectric conversion efficiency and high generated energy are obtained.
According to an embodiment of the present invention, the linear motor is connected in parallel to the thermoacoustic engine;
wherein the connecting pipe is a resonance pipe.
Particularly, the sound power is converted into the electric power by the linear motor and the resonance tube.
According to the utility model discloses an implement mode of embodiment, linear electric motor with the setting is established ties to the heat sound engine.
Particularly, the linear motor replaces a resonance tube to be connected in series in the system, the arrangement of the resonance tube is cancelled, the occupied space is reduced, the whole system is more compact, and the larger acoustic power loss of the resonance tube is avoided, so that higher efficiency is obtained.
The embodiment of the utility model provides an in above-mentioned one or more technical scheme, one of following technological effect has at least: the embodiment of the utility model provides an utilize thermoacoustic generating system of step heat energy and step cold energy, adopt thermoacoustic engine to pass through pipeline and heat exchanger and establish the sound field to utilize working medium gas and solid filler interact in the regenerator, convert external heat energy into acoustic energy. The sound energy generated by the thermoacoustic engine is transmitted to the linear motor, and the linear motor converts the sound energy into electric energy to realize cold energy recovery and waste heat utilization; meanwhile, the cascade utilization of cold energy and waste heat is realized, and the energy utilization rate is effectively improved; and compared with the traditional thermoacoustic power generation system, the loop structure system has more compact structure and higher efficiency.
Additional aspects and advantages of embodiments of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of embodiments of the invention.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a first schematic view of an arrangement relationship of a thermoacoustic power generation system using step heat energy and step cold energy according to an embodiment of the present invention;
fig. 2 is a schematic view of the assembly relationship of a thermoacoustic engine in a thermoacoustic power generation system using step heat energy and step cold energy according to an embodiment of the present invention;
fig. 3 is a schematic view illustrating an assembly relationship of a linear motor in the thermo-acoustic power generation system using step heat energy and step cold energy according to an embodiment of the present invention;
fig. 4 is a second schematic diagram illustrating an arrangement relationship of the thermo-acoustic power generation system using the step heat energy and the step cold energy according to the embodiment of the present invention;
fig. 5 is a third schematic view illustrating an arrangement relationship of a thermoacoustic power generation system using step heat energy and step cold energy according to an embodiment of the present invention;
fig. 6 is a fourth schematic diagram illustrating an arrangement relationship of the thermo-acoustic power generation system using the step heat energy and the step cold energy according to the embodiment of the present invention.
Reference numerals:
100. a thermoacoustic power generation circuit;
110. a thermoacoustic power generation unit;
120. a connecting pipe;
130. a linear motor; 131. a support structure; 132. a mover; 133. a stator; 134. a piston;
140. a thermoacoustic engine;
150. a first room temperature heat exchanger;
160. a second room temperature heat exchanger;
170. a thermoacoustic component; 171. a first thermal buffer tube; 172. a low temperature side heat exchanger; 173. a heat regenerator; 174. a high temperature side heat exchanger; 175. a second thermal buffer tube;
200. a low temperature cold energy supply system;
300. a low-grade heat energy supply system.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
As shown in fig. 1 to 6, the utility model provides an utilize thermoacoustic power generation system of step heat energy and step cold energy, this thermoacoustic power generation system comprises N group thermoacoustic engine 140, N linear electric motor 130 and connecting pipe 120, and N is the positive integer, and N group thermoacoustic engine 140 passes through connecting pipe 120 end to end and constitutes loop system. The linear motor 130 has two connection modes: one is connected to the resonance tube; the second is serially connected to the loop, and the connecting pipe 120 is used to replace the resonance pipe to connect the thermoacoustic engines 140 at different stages. The thermoacoustic power generation system uses a mixed working medium composed of working media including but not limited to helium, hydrogen, nitrogen and a plurality of components.
Each thermoacoustic engine 140 includes a first room temperature heat exchanger 150, M thermoacoustic components 170, and a second room temperature heat exchanger 160, where M is any positive integer. Each thermoacoustic assembly 170 includes a first thermal buffer tube 171, a low temperature end heat exchanger 172, a regenerator 173, a high temperature end heat exchanger 174, and a second thermal buffer tube 175 connected in series. The first thermal buffer tube 171 of the thermo-acoustic assembly 170 is connected to the first room temperature heat exchanger 150, and the other end of the thermo-acoustic assembly 170 is connected to the second room temperature heat exchanger 160 through the second thermal buffer tube 175 of the thermo-acoustic assembly 170, so that the thermo-acoustic assembly 170 is connected in parallel to form the thermo-acoustic engine 140.
In addition, the linear motor 130 is composed of a piston 134, a generator mover 132 coupled to the piston 134 by a support structure 131 supporting the piston 134, and a generator stator 133 wound around the periphery of the generator mover 132. The load of the linear motor 130 is a resistor, a grid, or others. The linear motor 130 can convert acoustic power into electric power for output, and the piston 134 in the linear motor 130 can adjust impedance to match acoustic impedances of the linear motor 130 and the thermoacoustic engine 140, so that high thermoelectric conversion efficiency and high power generation capacity are obtained.
In each thermoacoustic engine 140, the waste heat source sequentially passes through the high-temperature-end heat exchangers 174 of the M thermoacoustic assemblies 170 in each thermoacoustic engine 140, and the heat of the heat source is gradually absorbed and the temperature is reduced, so that the temperature of the high-temperature-end heat exchangers 174 passing through is gradually reduced; the temperature of the heat source is reduced to room temperature after the heat source passes through the last stage of high-heat-end heat exchanger. The cold source, particularly the LNG cold source, sequentially passes through the low-temperature-end heat exchangers 172 of the M thermo-acoustic assemblies 170 in each group of thermo-acoustic engines 140 in the opposite direction of the waste heat source, and the cold source absorbs heat step by step to raise the temperature, so that the temperature of the passing low-temperature-end heat exchangers 172 is raised step by step; the temperature rises to room temperature after the cold source passes through the last stage of the low temperature side heat exchanger 172. Therefore, temperature gradients are formed at both ends of the regenerators 173 of the M thermoacoustic assemblies 170 in each group of thermoacoustic engines 140, and the system self-excited starts to vibrate under the temperature gradients, so that the conversion from heat energy to acoustic power is realized.
Further, the acoustic work produced by the thermoacoustic assembly 170 is transferred in the positive direction of the temperature gradient to the second thermal buffer tube 175, the second room temperature heat exchanger 160, and the resonator tube of the set of thermoacoustic assemblies 170, and finally to the linear motor 130. The linear motor 130 converts a part of the acoustic power into electric power, the rest of the acoustic power is transmitted to the next group of thermoacoustic engines 140 through the resonance tubes, and after passing through the first room temperature heat exchanger 150 and the first thermal buffer tube 171, the rest of the acoustic power is continuously amplified in the heat regenerator 173, so that the acoustic power is recycled, and the energy efficiency of the whole machine is improved. Meanwhile, the thermoacoustic engine 140 generates acoustic power under the temperature difference gradient of the unit, and the acoustic power is sequentially transmitted to the next stage to be converted into electric power.
Further, a temperature gradient is formed at two ends of the regenerator 173 of each thermo-acoustic assembly 170, and each thermo-acoustic assembly 170 self-oscillates under the respective temperature gradient, so as to convert heat energy into acoustic work. The acoustic work produced by the thermoacoustic assembly 170 is transferred in the positive direction of the temperature gradient to the second thermal buffer tube 175, the second room temperature heat exchanger 160, and the resonator tube of the group of thermoacoustic assemblies 170, and finally to the linear motor 130. The linear motor 130 converts a part of the acoustic power into electric power, and the rest of the acoustic power is transmitted to each thermoacoustic assembly 170 in the next thermoacoustic engine 140 through the resonance tube, and the rest of the acoustic power is amplified after passing through the first room temperature heat exchanger 150 and the first thermal buffer tube 171 and passing through the heat regenerator 173, and the acoustic power is generated under the temperature difference gradient of the unit and is sequentially transmitted to the next stage, so that the acoustic power is converted into electric power.
Further, in each thermoacoustic engine 140, the waste heat source higher than TH sequentially passes through the high-temperature-end heat exchanger 174 of the thermoacoustic assembly 170 in each thermoacoustic engine 140, and the heat of the heat source is gradually absorbed and the temperature is reduced, so that the temperature of the passing high-temperature-end heat exchanger 174 is gradually reduced; the heat source is reduced to room temperature TA after passing through the last high heat end heat exchanger. The cold source with the temperature of TC sequentially passes through the low-temperature end heat exchangers 172 of the thermoacoustic assemblies 170 in each group of thermoacoustic engines 140 in the opposite direction of the waste heat source, and the cold source absorbs heat step by step to increase the temperature, so that the temperature of the passing low-temperature end heat exchangers 172 is increased step by step; the temperature reaches the room temperature TA after the cold source passes through the last stage of low temperature side heat exchanger 172. Therefore, a temperature gradient is formed at both ends of the regenerator 173 of the thermoacoustic assembly 170 in each group of thermoacoustic engine 140, and the system self-excited starts to vibrate under the temperature gradient, thereby realizing the conversion from heat energy to acoustic power.
Further, the acoustic work produced by the thermoacoustic assembly 170 is transferred in the positive direction of the temperature gradient to the second thermal buffer tube 175, the second room temperature heat exchanger 160, and the resonator tube of the set of thermoacoustic assemblies 170, and finally to the by-pass linear motor 130. The linear motor 130 converts a part of the acoustic power into electric power, and the rest of the acoustic power is transmitted to the next group of thermoacoustic engines 140 through the resonance tubes to repeat the above processes. Therefore, the system can recycle the sound power, thereby improving the efficiency of the whole machine.
In the description of the embodiments of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "connected" and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the embodiments of the present invention can be understood in specific cases by those skilled in the art.
In embodiments of the invention, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In some embodiments of the present invention, as shown in fig. 1 to 6, the present solution provides a thermo-acoustic power generation system using step heat energy and step cold energy, including: a thermoacoustic power generation loop 100, a low-temperature cold energy supply system 200 and a low-grade heat energy supply system 300; the thermoacoustic power generation circuit 100 comprises at least two groups of thermoacoustic power generation units 110 and a connecting pipe 120 connected with the thermoacoustic power generation units 110; each group of thermoacoustic power generation units 110 comprises a linear motor 130 and a thermoacoustic engine 140, the linear motor 130 and the thermoacoustic engine 140 are connected through a connecting pipe 120, and the thermoacoustic engine 140 is connected with the adjacent thermoacoustic power generation units 110 in the thermoacoustic power generation circuit 100 through the connecting pipe 120; the thermoacoustic engine 140 includes a first room temperature heat exchanger 150 and a second room temperature heat exchanger 160, and at least two sets of thermoacoustic assemblies 170 disposed in parallel between the first room temperature heat exchanger 150 and the second room temperature heat exchanger 160; the low-temperature cold energy supply system 200 is sequentially connected in series with the thermoacoustic components 170 arranged in parallel, and a low-temperature end with the temperature distributed in a gradient manner is formed at one end of the thermoacoustic components 170; the low-grade heat energy supply system 300 is connected in series with the thermoacoustic elements 170 arranged in parallel, and a high-temperature end with the temperature distributed in a gradient manner is formed at the other end of the thermoacoustic element 170.
The embodiment of the utility model provides an utilize thermoacoustic generating system of step heat energy and step cold energy, adopt thermoacoustic engine 140 to establish the sound field through pipeline and heat exchanger to utilize working medium gas and solid filler interact in regenerator 173, convert external heat energy into acoustic energy. The sound energy generated by the thermoacoustic engine 140 is transmitted to the linear motor 130, and the linear motor 130 converts the sound energy into electric energy to realize cold energy recovery and waste heat utilization; meanwhile, the cascade utilization of cold energy and waste heat is realized, and the energy utilization rate is effectively improved; and compared with the traditional thermoacoustic power generation system, the loop structure system has more compact structure and higher efficiency.
In some embodiments, the thermoacoustic assembly 170 comprises a first thermal buffer tube 171, a low temperature end heat exchanger 172, a regenerator 173, a high temperature end heat exchanger 174, and a second thermal buffer tube 175 disposed in sequence from the first room temperature heat exchanger 150 to the second room temperature heat exchanger 160; the low-temperature cold energy supply system 200 is connected to the low-temperature side heat exchanger 172, and the low-grade heat energy supply system 300 is connected to the high-temperature side heat exchanger 174.
Specifically, the low-temperature cold energy supply system 200 is connected to the low-temperature side heat exchanger 172, so that energy conversion between the low-temperature cold energy and the low-temperature side heat exchanger 172 is realized, the low-temperature cold energy is connected in series with the low-temperature side heat exchanger 172, so that the low-temperature cold energy absorbs heat step by step to increase the temperature, and a gradient cold energy distribution region is formed in the low-temperature side heat exchanger 172.
Further, the low-grade heat energy supply system 300 is connected to the high-temperature end heat exchanger 174, so as to realize energy conversion of the low-grade heat energy, and the low-grade heat energy is connected in series with the high-temperature end heat exchanger 174, so that the heat of the low-grade heat energy is gradually absorbed and the temperature is reduced, and a gradient heat energy distribution interval is formed in the high-temperature end heat exchanger 174.
It should be noted that, by providing a plurality of low-temperature heat exchangers connected in parallel to the low-temperature cold energy supply system 200 and a plurality of high-temperature heat exchangers connected in parallel to the low-grade heat energy supply system 300, recycling of all cold energy and heat energy from the low-temperature region to the high-temperature region is achieved.
In some embodiments, cold energy provided by the low temperature cold energy supply system 200 sequentially enters the thermoacoustic engine 140 from the low temperature-side heat exchangers 172 arranged in parallel; the heat energy provided by the low-grade heat energy supply system 300 sequentially enters the thermoacoustic engine 140 from the high-temperature end heat exchangers 174 arranged in parallel; wherein, the direction of the cold energy provided by the low-temperature cold energy supply system 200 entering the thermoacoustic engine 140 is opposite to the direction of the heat energy provided by the low-grade heat energy supply system 300 entering the thermoacoustic engine 140.
Specifically, the opposing arrangement causes the temperature differential across each thermoacoustic assembly 170 to be substantially the same, such that the output of each thermoacoustic assembly 170 is stable.
In some embodiments, the cold energy provided by the low-temperature cold energy supply system 200 is sequentially heat-exchanged by each of the low-temperature side heat exchangers 172 and then warmed to room temperature.
Specifically, after the low-temperature cold energy is heated to the room temperature, on one hand, the energy released by the cold energy is recycled, and on the other hand, a heat exchange scheme is provided for the utilization of the cold energy returning to the room temperature.
In some embodiments, the cold energy provided by the cryogenic cold energy supply system 200 is derived from liquefied natural gas or liquid nitrogen.
Specifically, the cold energy in the liquefied natural gas or the liquid nitrogen is released, so that the recovery of the cold energy is realized, and the use of the natural gas and the nitrogen is realized.
In some embodiments, the heat energy provided by the low-grade heat energy supply system 300 is sequentially cooled to room temperature after being heat exchanged by each high-temperature-side heat exchanger 174.
Specifically, after the low-grade heat energy is cooled to the room temperature, pollution-free emission is realized.
In some embodiments, the thermal energy provided by the low-grade thermal energy supply system 300 is derived from solar energy or industrial waste heat.
Specifically, embodiments of utilizing solar energy or industrial waste heat are proposed.
In some embodiments, the linear motor 130 includes a support structure 131, a mover 132, a stator 133, a piston 134, and a load; the support structure 131 is provided as a housing of the linear motor 130; the piston 134 is disposed inside the support structure 131 and connected with the mover 132; the stator 133 is wound around the outside of the mover 132; the load is connected to the piston 134; wherein, the load is a resistor and/or a power grid.
Specifically, the linear motor 130 can convert acoustic power into electric power for output, and the piston 134 in the linear motor 130 can adjust impedance to match acoustic impedances of the linear motor 130 and the thermoacoustic engine 140, thereby obtaining high thermoelectric conversion efficiency and large generated power.
In some embodiments, as shown in fig. 1, 3, and 5, linear motor 130 is disposed in parallel with thermoacoustic engine 140; the connecting tube 120 is a resonator tube.
Specifically, the sound power is converted into electric power by the linear motor 130 being connected to the resonance tube.
In some embodiments, as shown in FIG. 6, linear motor 130 is disposed in series with thermoacoustic engine 140.
Specifically, the linear motor 130 replaces the resonant tube to be connected in series in the system, the arrangement of the resonant tube is cancelled, the occupied space is reduced, the whole system is more compact, and the larger acoustic power loss of the resonant tube is avoided, so that higher efficiency is obtained.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of an embodiment of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Finally, it should be noted that: the above embodiments are merely illustrative, and not restrictive, of the present invention. Although the present invention has been described in detail with reference to the embodiments, it should be understood by those skilled in the art that various combinations, modifications or equivalent substitutions may be made to the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention, and all of the technical solutions should be covered by the scope of the claims of the present invention.
Claims (10)
1. A thermo-acoustic power generation system using cascade heat energy and cascade cold energy, comprising: the system comprises a thermoacoustic power generation loop, a low-temperature cold energy supply system and a low-grade heat energy supply system;
the thermoacoustic power generation loop comprises at least two groups of thermoacoustic power generation units and connecting pipes connected with the thermoacoustic power generation units;
each group of thermoacoustic power generation units comprises a linear motor and a thermoacoustic engine, the linear motor is connected with the thermoacoustic engine through the connecting pipe, and the thermoacoustic engine is connected with the adjacent thermoacoustic power generation units in the thermoacoustic power generation loop through the connecting pipe;
the thermoacoustic engine comprises a first room temperature heat exchanger, a second room temperature heat exchanger and at least two groups of thermoacoustic assemblies which are arranged between the first room temperature heat exchanger and the second room temperature heat exchanger in parallel;
the low-temperature cold energy supply system is sequentially connected in series with the thermoacoustic components arranged in parallel, and a low-temperature end with the temperature distributed in a gradient manner is formed at one end of each thermoacoustic component;
the low-grade heat energy supply system is sequentially connected in series with the thermoacoustic components arranged in parallel, and a high-temperature end with the temperature distributed in a gradient manner is formed at the other end of the thermoacoustic component.
2. The thermoacoustic system according to claim 1, wherein the thermoacoustic module comprises a first thermal buffer tube, a low temperature side heat exchanger, a regenerator, a high temperature side heat exchanger, and a second thermal buffer tube, which are sequentially disposed from the first room temperature heat exchanger to the second room temperature heat exchanger;
the low-temperature cold energy supply system is connected with the low-temperature end heat exchanger, and the low-grade heat energy supply system is connected with the high-temperature end heat exchanger.
3. The thermoacoustic power generation system utilizing stepped heat energy and stepped cold energy according to claim 2, wherein the cold energy provided by the low-temperature cold energy supply system sequentially enters the thermoacoustic engine from the low-temperature-end heat exchangers arranged in parallel;
the heat energy provided by the low-grade heat energy supply system sequentially enters the thermoacoustic engine from the high-temperature end heat exchangers arranged in parallel;
the direction of the cold energy provided by the low-temperature cold energy supply system entering the thermoacoustic engine is opposite to the direction of the heat energy provided by the low-grade heat energy supply system entering the thermoacoustic engine.
4. The thermo-acoustic power generation system utilizing the cascade heat energy and the cascade cold energy according to claim 3, wherein the cold energy provided by the low-temperature cold energy supply system is heated to room temperature after being subjected to heat exchange by each low-temperature-end heat exchanger in sequence.
5. The thermo-acoustic power generation system utilizing the step heat energy and the step cold energy according to claim 4, wherein the cold energy provided by the low-temperature cold energy supply system is from liquefied natural gas or liquid nitrogen.
6. The thermo-acoustic power generation system utilizing the cascade heat energy and the cascade cold energy according to claim 3, wherein the heat energy provided by the low-grade heat energy supply system is sequentially cooled to room temperature after being subjected to heat exchange by each high-temperature-end heat exchanger.
7. The thermo-acoustic power generation system using cascade thermal energy and cascade cold energy according to claim 6, wherein the thermal energy provided by the low-grade thermal energy supply system is derived from solar energy or industrial waste heat.
8. The thermo-acoustic power generation system using the step heating energy and the step cooling energy according to any one of claims 1 to 7, wherein the linear motor comprises a support structure, a mover, a stator, a piston, and a load;
the support structure is arranged as a shell of the linear motor;
the piston is arranged in the supporting structure and is connected with the rotor;
the stator is wound outside the rotor;
the load is connected with the piston;
wherein the load is a resistor and/or a power grid.
9. The thermo-acoustic power generation system using cascade heat energy and cascade cold energy according to claim 8, wherein the linear motor is disposed in parallel with the thermo-acoustic engine;
wherein the connecting pipe is a resonance pipe.
10. The thermo-acoustic power generation system using cascade thermal energy and cascade cold energy according to claim 8, wherein the linear motor is disposed in series with the thermo-acoustic engine.
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