CN110701823B - Electric card refrigerating system driven by thermoacoustic and pyroelectric coupling - Google Patents
Electric card refrigerating system driven by thermoacoustic and pyroelectric coupling Download PDFInfo
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- CN110701823B CN110701823B CN201910989542.9A CN201910989542A CN110701823B CN 110701823 B CN110701823 B CN 110701823B CN 201910989542 A CN201910989542 A CN 201910989542A CN 110701823 B CN110701823 B CN 110701823B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B21/00—Machines, plants or systems, using electric or magnetic effects
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
Abstract
The invention relates to the technical field of refrigeration, in particular to an electric card refrigeration system driven by thermoacoustic and pyroelectric coupling, which comprises a pyroelectric power generation-engine and an electric card refrigerator, wherein a thermal buffer pipeline is arranged between the pyroelectric power generation-engine and the electric card refrigerator, the pyroelectric power generation-engine and the electric card refrigerator are connected through a lead to form a loop, a pyroelectric body material which can be used as a heat regenerator material of an engine is filled in the pyroelectric power generation-engine, and the pyroelectric body material comprises a single crystal material, a high-molecular organic polymer and a composite material, polyvinylidene fluoride, metal oxide ceramics and a film material. The invention solves the problems of huge and complex moving parts and systems in the traditional gas compression refrigeration technology, the pyroelectricity generation-engine formed by combining the thermoacoustic engine and the pyroelectricity generation technology drives the working medium to reciprocate to replace the traditional mechanical pump, the system has no moving abrasion, is silent, safe and reliable, and simultaneously improves the stability of the system, and the system is more compact.
Description
Technical Field
The invention relates to the technical field of refrigeration, in particular to an electric card refrigeration system driven by thermoacoustic and pyroelectric coupling.
Background
The traditional steam compression type refrigerating system consists of four main parts, namely a compressor, a condenser, a throttling device, an evaporator and the like, wherein working media circulate in the system and are sequentially connected through pipelines to form a completely closed system, a refrigerant circulates in a fluid state in the closed refrigerating system, and continuously absorbs heat from the evaporator and emits heat in the condenser through phase change, so that the aim of refrigeration is fulfilled. Although the technology is mature, the problems of large and complex system, harm to the environment caused by refrigerant and easy abrasion and damage of moving parts in the refrigeration system exist.
The electric card refrigeration utilizes the electric card effect of the ferroelectric material, namely, the refrigeration is carried out by utilizing the effect of the change of adiabatic temperature or isothermal entropy generated by the change of the polarization state caused by the change of an external electric field in the polar material. Compared with the traditional evaporation-compression refrigeration, the refrigeration system has the advantages of higher efficiency and environmental protection. At present, research work on the electrocaloric effect mainly focuses on the research of novel ferroelectric materials, the research work covers inorganic ferroelectric antiferroelectric single crystals, ceramics, thin films, thick films, organic ferroelectric thin films, thick films, ferroelectric liquid crystals and the like, and a plurality of materials show attractive application prospects, but how to combine the ferroelectric materials with the prior art and exert the potential of the electrocaloric effect to carry out commercialization still needs further research and research.
The thermoacoustic heat engine is a thermal-power conversion device which converts thermal energy into mechanical energy in the form of acoustic waves by utilizing thermoacoustic effect, and has the advantages of good energy adaptability, high reliability and the like. The generalized thermoacoustic engine not only comprises the traditional standing wave, traveling wave and double-acting thermoacoustic engine, but also comprises structural forms of a Stirling engine and the like. Thermoacoustic engines are devices that use thermal energy to produce fluid reciprocating motion, with a wide operating frequency, typically several hertz to kilohertz. If the thermoacoustic engine is connected with a refrigerator, the function of power-heat conversion can be realized.
At present, most of the existing refrigerators driven by thermoacoustic engines utilize pulse tube refrigerators or generalized stirling refrigerators based on thermoacoustic theory, and the mechanical energy in the form of acoustic power generated by thermoacoustic engines is converted into heat and power in the heat regenerator of the refrigerator, so that heat is continuously transported from a low-temperature heat source to a normal-temperature heat exchanger, thereby realizing the refrigeration function. However, compared with the traditional gas compression refrigeration, the existing thermoacoustic refrigerator has the problem of low efficiency.
Disclosure of Invention
Technical problem to be solved
The invention aims to solve the technical problems that the existing refrigerating system has the harm of refrigerant to the environment, the system is complex and parts are abraded.
(II) technical scheme
In order to solve the technical problem, the invention provides an electric card refrigerating system driven by thermoacoustic and pyroelectric coupling, which comprises a pyroelectric power generation-engine and an electric card refrigerator, wherein a thermal buffer pipeline is arranged between the pyroelectric power generation-engine and the electric card refrigerator, the pyroelectric power generation-engine and the electric card refrigerator are connected through a lead to form a loop, a pyroelectric body material which can be used as an engine heat regenerator material is filled in the pyroelectric power generation-engine, and the pyroelectric body material comprises a single crystal material, a high-molecular organic polymer and composite material, polyvinylidene fluoride, metal oxide ceramics and a film material.
The working temperature range of the pyroelectric power generation-engine is 0-1000 ℃.
The pyroelectric power generation-engine comprises a first heat exchanger, a pyroelectric power generation-engine heat regenerator and a second heat exchanger, wherein the pyroelectric power generation-engine heat regenerator is arranged between the first heat exchanger and the second heat exchanger, the heat exchange temperature of the first heat exchanger is lower than that of the second heat exchanger, the thermal buffer pipeline is arranged between the second heat exchanger and the electric card refrigerator, and the pyroelectric material is filled in the pyroelectric power generation-engine heat regenerator according to the gradual change rule of a temperature zone.
The electric card refrigerator comprises a third heat exchanger, an electric card heat regenerator and a fourth heat exchanger, wherein the electric card heat regenerator is arranged between the third heat exchanger and the fourth heat exchanger, the heat exchange temperature of the third heat exchanger is lower than that of the second heat exchanger, the heat exchange temperature of the third heat exchanger is higher than that of the fourth heat exchanger, a thermal buffer pipeline is arranged between the third heat exchanger and the second heat exchanger, and ferroelectric materials are filled in the electric card heat regenerator according to the gradual change rule of a temperature zone.
The heat buffering type thermoelectric refrigerating machine is characterized by further comprising a pipe body, working media are filled in the pipe body, the thermoelectric generation-engine and the electric card refrigerating machine are both arranged in the pipe body, a pipe section between the thermoelectric generation-engine and the electric card refrigerating machine is the heat buffering pipeline, and the working media are gas and/or liquid.
The tube body comprises an annular tube and a resonance tube, the resonance tube is communicated with the annular tube, the pyroelectric power generation-engine is arranged in the annular tube, and the electric card refrigerator is arranged in the resonance tube.
Wherein, set up secondary heat exchanger in the hot buffer pipeline.
The electric card refrigerating system driven by thermoacoustic and pyroelectric coupling is of a traveling wave type, standing wave type or U-shaped structure.
(III) advantageous effects
The technical scheme of the invention has the following advantages:
when a proper pyroelectric material is selected as a heat regenerator filling material of a pyroelectric generator-engine, the pyroelectric generator-engine formed by combining the thermoacoustic engine and a pyroelectric power generation technology can be used as the thermoacoustic engine and the pyroelectric generator at the same time, heat is converted into mechanical energy in an acoustic function form, a thermal power conversion process is realized, and a working medium in the pyroelectric power generation-engine driving system reciprocates at a certain frequency to replace a traditional mechanical pump. Meanwhile, after the pyroelectric power generation-engine generates mechanical energy in the form of acoustic power, the acoustic power firstly passes through the pyroelectric power generation-engine, as the pyroelectric power generation-engine can generate pyroelectric effect under the adiabatic state, namely inverse electrocaloric effect, when the mechanical energy in the form of acoustic power pushes working media to perform high-speed reciprocating motion with specific frequency in the pyroelectric power generation-engine, the pyroelectric power generation-engine can generate an electric field with certain frequency, the electric field is transmitted to the electrocaloric refrigerator through a lead, as the electrocaloric refrigerator can be understood as numerous tiny isothermal-adiabatic processes during working, the working frequency of the system can be changed by changing the combination of the size structure of the system and the inflation pressure, thus under the dual action of an induction electric field generated by the pyroelectric power generation-engine and an alternating flow field of reciprocating motion, the electric card refrigerator utilizes the electric card effect to convey the heat of the external environment into the system, thereby realizing the refrigeration function. The heat buffer pipeline can enable the pyroelectric power generation-engine machine to be in a suitable material transition temperature zone and play a certain phase modulation role at the same time.
The invention solves the problems of large and complex moving parts and systems and the harm of refrigerant to the environment in the traditional gas compression refrigeration technology, provides a thermoacoustic and pyroelectric coupling driven electric card refrigeration system without moving parts, and a pyroelectric power generation-engine formed by combining a thermoacoustic engine and a pyroelectric power generation technology.
In addition to the technical problems addressed by the present invention, the technical features constituting the technical solutions and the advantages brought by the technical features of the technical solutions described above, other technical features of the present invention and the advantages brought by the technical features of the technical solutions will be further explained with reference to the accompanying drawings.
Drawings
FIG. 1 is a schematic structural diagram of an electric card refrigeration system driven by thermo-acoustic and pyroelectric coupling according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an electric card refrigeration system driven by thermo-acoustic and pyroelectric coupling according to an embodiment of the present invention.
In the figure: 2: pyroelectric power generation-engines; 3: an electric card refrigerator; 5: a thermal buffer conduit; 6: a wire; 7: a pipe body; 8: working medium; 9: a secondary heat exchanger; 21: a first heat exchanger; 22: a pyroelectric power generation-engine heat regenerator; 23: a second heat exchanger; 31: a third heat exchanger; 32: an electric card heat regenerator; 33: a fourth heat exchanger; 71: an annular tube; 72: a resonator tube.
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 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. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, in the description of the present invention, unless otherwise specified, "plurality", "plural groups" means two or more, and "several", "several groups" means one or more.
The electric card refrigeration utilizes the electric card effect of the ferroelectric material, namely, the refrigeration is carried out by utilizing the effect of the change of adiabatic temperature or isothermal entropy generated by the change of the polarization state caused by the change of an external electric field in the polar material. Since the electric clamping effect is directly related to the change of the polarization intensity P, the ferroelectric material with strong polarity can generate larger electric clamping effect. The electrocaloric effect is the inverse of the pyroelectric effect, and is also called inverse pyroelectric effect. Applying an electric field to the polar material, wherein electric dipoles in the material are changed from disorder to order, the entropy of the material is reduced, and the redundant entropy generates temperature rise under the adiabatic condition; if the ferroelectric material is contacted with the heat sink with the electric field unchanged, the heat of the ferroelectric material is transferred, and the temperature is reduced; then removing the electric field, changing the electric dipole in the material from order to disorder, increasing the entropy of the material, and under the condition of isothermal temperature, the material absorbs heat from the outside to make energy conservation, or under the condition of adiabatic temperature, the insufficient entropy causes the temperature of the material to drop; if the electric field strength is continuously kept to be zero, the temperature of the electric card material is lower than the refrigeration environment temperature, and energy is transferred to the electric card material from the low-temperature heat source. The material with larger electrocaloric effect is expected to realize dielectric refrigeration, and has the advantages of higher efficiency and environmental protection compared with the traditional evaporation-compression refrigeration.
The thermoacoustic engine is a thermal-power conversion device which converts thermal energy into mechanical energy in the form of acoustic waves by utilizing thermoacoustic effect, and has the advantages of good energy adaptability, high reliability and the like. The generalized thermoacoustic engine not only comprises the traditional standing wave, traveling wave and double-acting thermoacoustic engine, but also comprises structural forms of a Stirling engine and the like. Its core components mainly comprise heater, heat regenerator and water cooler, and its auxiliary components can also include thermal buffer tube, secondary water cooler, resonance tube and discharger. In the thermoacoustic engine, as long as a high-temperature heat source exists, the axial temperature gradient of the regenerator reaches a certain value, the system can self-oscillate, namely the system spontaneously converts part of the heat of the high-temperature heat source into mechanical energy in the form of sound waves, and part of the heat is transferred to the environment through a low-temperature component, namely a water cooler. Thermoacoustic engines are devices that use thermal energy to produce reciprocating alternating motion of a fluid, with a wide operating frequency, typically a few hertz to kilohertz. If the thermoacoustic engine is connected with a refrigerator, the function of power-heat conversion can be realized.
Example one
As shown in fig. 1, the electric card refrigeration system driven by thermo-acoustic and pyroelectric coupling provided by the embodiment of the present invention includes a pyroelectric power generation-engine 2 and an electric card refrigerator 3, the pyroelectric power generation-engine 2 and the electric card refrigerator 3 are provided with a thermal buffer pipeline 5, the pyroelectric power generation-engine 2 and the electric card refrigerator 3 are connected by a wire 6 to form a loop, the pyroelectric power generation-engine 2 is filled with a pyroelectric material capable of being used as a thermal regenerator material of the thermo-acoustic engine, and the pyroelectric material includes a single crystal material, a high molecular organic polymer and composite material, polyvinylidene fluoride, a metal oxide ceramic, and a thin film material.
When a proper pyroelectric material is selected as a heat regenerator filling material of a pyroelectric generator-engine, the pyroelectric generator-engine formed by combining the thermoacoustic engine and a pyroelectric power generation technology can be used as the thermoacoustic engine and the pyroelectric generator at the same time to form the pyroelectric power generation-engine, heat can be converted into mechanical energy in a sound power form, a thermal power conversion process is realized, and a working medium in the pyroelectric power generation-engine driving system reciprocates at a certain frequency to replace a traditional mechanical pump. Meanwhile, after the pyroelectric power generation-engine generates mechanical energy in the form of acoustic power, the acoustic power firstly passes through the pyroelectric power generation-engine, as the pyroelectric power generation-engine can generate pyroelectric effect under the adiabatic state, namely inverse electrocaloric effect, when the mechanical energy in the form of acoustic power pushes working media to perform high-speed reciprocating motion with specific frequency in the pyroelectric power generation-engine, the pyroelectric power generation-engine can generate an electric field with certain frequency, the electric field is transmitted to the electrocaloric refrigerator through a lead, as the electrocaloric refrigerator can be understood as numerous tiny isothermal-adiabatic processes during working, the working frequency of the system can be changed by changing the combination of the size structure of the system and the inflation pressure, thus under the dual action of an induction electric field generated by the pyroelectric power generation-engine and an alternating flow field of reciprocating motion, the electric card refrigerator utilizes the electric card effect to convey the heat of the external environment into the system, thereby realizing the refrigeration function. The heat buffer pipeline can enable the pyroelectric power generation-engine machine to be in a suitable material transition temperature zone and play a certain phase modulation role at the same time.
The invention solves the problems of large and complex moving parts and systems and the harm of refrigerant to the environment in the traditional gas compression refrigeration technology, provides a thermoacoustic and pyroelectric coupling driven electric card refrigeration system without moving parts, and combines a thermoacoustic engine and a pyroelectric power generation technology to form a pyroelectric power generation-engine.
It is emphasized that the positions of the pyroelectric power generation-engine and the electric card refrigerator can be interchanged, the relative positions of the pyroelectric power generation-engine and the electric card refrigerator are not fixed, and the working medium in the system can be gas, such as helium, hydrogen, nitrogen and the like, and can also be liquid, such as water, saline solution, heat conduction oil, liquid metal and the like, and has the characteristics of green and no toxicity. The system can be connected in series or in parallel in multiple stages, so that multi-stage refrigeration is realized; the working medium in the system can be a gas medium or a gas-liquid coexisting form.
The working temperature range of the pyroelectric power generation-engine 2 is 0-1000 ℃, and the pyroelectric material comprises a single crystal material, a high-molecular organic polymer and composite material, PVDF (polyvinylidene fluoride), metal oxide ceramic and a film material. In this embodiment, the single crystal material may be TGS (triglycine sulfate), the high molecular organic polymer and the composite material may be PVF (polyvinyl fluoride) or PVDF, and the metal oxide ceramic and the thin film material may be ZnO or BaTiO3。
The pyroelectric power generation-engine 2 comprises a first heat exchanger 21, a pyroelectric power generation-engine heat regenerator 22 and a second heat exchanger 23, the pyroelectric power generation-engine heat regenerator 22 is arranged between the first heat exchanger 21 and the second heat exchanger 23, the heat exchange temperature of the first heat exchanger 21 is lower than that of the second heat exchanger 23, a thermal buffer pipeline 5 is arranged between the second heat exchanger 23 and the electric card refrigerator 3, and pyroelectric material is filled in the pyroelectric power generation-engine heat regenerator 22 according to the gradual change rule of a temperature zone. In this embodiment, the first heat exchanger is a first pyroelectric heat exchanger, the second heat exchanger is a second pyroelectric heat exchanger, when the refrigeration system works, heat is input to the system by the second heat exchanger, and the first heat exchanger transfers redundant heat to the outside. The pyroelectric power generation-engine heat regenerator adopts a pyroelectric body as a porous material of the heat regenerator, wherein the material of the pyroelectric body is selected according to temperature zone gradient formed by temperature difference of two ends of the pyroelectric power generation-engine heat regenerator and is filled into the pyroelectric power generation-engine heat regenerator, and the pyroelectric body can generate pyroelectric effect under an adiabatic state, namely inverse electricity clamping effect, so that the pyroelectric power generation-engine heat regenerator can be used as the heat regenerator of a thermoacoustic engine and the heat regenerator of a pyroelectric generator. When the pyroelectric power generation-engine generates mechanical energy in the form of acoustic power, the acoustic power firstly passes through the pyroelectric power generation-engine, and the pyroelectric power generation-engine generates an electric field with certain frequency and an alternating flow field with reciprocating motion. The invention uses heat energy to drive, uses the thermal acoustic effect to replace a reciprocating mechanical pump to realize the heating and cooling of the solid material, and simultaneously uses the pyroelectric effect of the pyroelectric material to provide an electric field for the electric card refrigerator to realize thermal refrigeration.
The heat regenerator of the pyroelectric power generation-engine directly replaces the conventional heat regenerator in the traditional thermoacoustic engine. When the axial temperature gradient formed by the temperature difference at the two sides of the pyroelectric power generation-engine heat regenerator reaches a certain value, the system can self-oscillate, and at the moment, a thermoacoustic engine consisting of the pyroelectric power generation-engine heat regenerator can drive a system working medium to do reciprocating motion with certain frequency; meanwhile, due to the pyroelectric effect of the pyroelectric body, the engine heat regenerator can generate an electric field with certain frequency capable of driving the electric card effect, and further drive the thermoacoustic-electric card refrigerator to work. Compared with the existing thermoacoustic engine refrigerating system, the refrigerating system of the invention has more compact structure.
The electric card refrigerator 3 comprises a third heat exchanger 31, an electric card heat regenerator 32 and a fourth heat exchanger 33, the electric card heat regenerator 32 is arranged between the third heat exchanger 31 and the fourth heat exchanger 33, the heat exchange temperature of the third heat exchanger 31 is lower than that of the second heat exchanger 23, the heat exchange temperature of the third heat exchanger 31 is higher than that of the fourth heat exchanger 33, a thermal buffer pipeline 5 is arranged between the third heat exchanger 31 and the second heat exchanger 23, and ferroelectric materials are filled in the electric card heat regenerator 32 according to the gradual change rule of a temperature zone. In this embodiment, the third heat exchanger is a room temperature heat exchanger, the fourth heat exchanger is a low temperature heat exchanger, the porous material inside the electric card heat regenerator is a ferroelectric material with an electric card effect, and the ferroelectric material is gradually selected according to a temperature zone formed by a temperature difference between two ends of the electric card heat regenerator and is filled into the electric card heat regenerator. When the thermoacoustic engine generates mechanical energy in the form of acoustic power to push the working medium to perform high-speed reciprocating motion with specific frequency in the pyroelectric power generation-engine heat regenerator, the working frequency of the system can be changed by changing the size structure of the system and combining the air charging pressure because the electric card heat regenerator can be understood as an infinite tiny isothermal-adiabatic process during working, so that under the dual actions of an induction electric field generated by the pyroelectric power generation-engine and a reciprocating alternating flow field, the heat at the low-temperature heat exchanger end is transmitted to the room-temperature heat exchanger end by using the electric card effect of the ferroelectric material in the electric card heat regenerator, and the refrigeration function is realized. The embodiment of the invention effectively combines the thermo-acoustic engine, the pyroelectric effect of the pyroelectric material and the electric card effect of the solid ferroelectric material to finish the refrigeration work.
The refrigeration system of the embodiment of the invention further comprises a tube body 7, a working medium 8 is filled in the tube body 7, the pyroelectric power generation-engine 2 and the electric card refrigerator 3 are both arranged in the tube body 1, a tube section between the pyroelectric power generation-engine 2 and the electric card refrigerator 3 is a thermal buffer pipeline 5, and the working medium 8 is gas and/or liquid. In this embodiment, the tube body is a straight tube, working media are filled in the tube body, and the pyroelectric power generation-engine and the electric card refrigerator are sequentially arranged in the tube body along the extension direction of the tube body to form a standing wave type thermal driving engine pyroelectric-electric card refrigeration system, wherein the working media are gases, and the buffer channel is a thermal buffer tube filled with gas working media.
Example two
As shown in fig. 2, the second embodiment of the present invention is substantially the same as the refrigeration system of the first embodiment, except that the pipe body 7 includes a ring pipe 71 and a resonance pipe 72, the resonance pipe 72 communicates with the ring pipe 71, the pyroelectric power generation-motor 2 is disposed in the ring pipe 71, and the electric card refrigerator 3 is disposed in the resonance pipe 72. In the embodiment, the tube body is divided into two parts, namely an annular tube and a resonance tube, the pyroelectric power generation-engine is independently arranged in the annular tube, and the electric card refrigerator is independently arranged in the resonance tube. Because the ring pipe is communicated with the resonance pipe, one part of the acoustic work mechanical energy generated by the pyroelectric power generation-engine machine and self-excited enables the electric card refrigerator in the resonance pipe to generate a refrigeration effect, the other part enables the pyroelectric power generation-engine to generate an electric field in the ring pipe, and the electric field returns to the first heat exchanger along the flow passage of the ring pipe to be amplified again, and the cycle is repeated in sequence.
Wherein a secondary heat exchanger 9 is arranged in the heat buffer pipe 5. The pipe section between the pyroelectric power generation-engine and the electric card refrigerator is a heat buffer pipeline and comprises a part of annular pipes and a part of resonance pipes, in the embodiment, secondary heat exchangers are arranged in the part of annular pipes, and the secondary heat exchangers further adjust the heat entering the first heat buffer pipeline so that the heat reaches the pyroelectric power generation-engine or the electric card refrigerator and is in a proper working temperature area, and the acoustic work on the pyroelectric power generation-engine meets the frequency requirement of the pyroelectric power generation-engine.
The structure of the electric card refrigerating system driven by thermoacoustic and pyroelectric coupling can be a traveling wave type, standing wave type or U-shaped structure. And selecting a proper system structure according to different application conditions, occasions and performance requirements.
In summary, in the electric card refrigeration system driven by thermo-acoustic and pyroelectric coupling according to the embodiments of the present invention, when a suitable pyroelectric material is selected as a heat regenerator filling material of the pyroelectric generator-engine, the pyroelectric generator-engine formed by combining the thermo-acoustic engine and the pyroelectric power generation technology can be used as both the thermo-acoustic engine and the pyroelectric generator to form the pyroelectric power generation-engine, which can convert heat into mechanical energy in the form of acoustic power to realize a thermal power conversion process, and a working medium in the pyroelectric power generation-engine driving system reciprocates at a certain frequency to replace a conventional mechanical pump. Meanwhile, after the pyroelectric power generation-engine generates mechanical energy in the form of acoustic power, the acoustic power firstly passes through the pyroelectric power generation-engine, as the pyroelectric power generation-engine can generate pyroelectric effect under the adiabatic state, namely inverse electrocaloric effect, when the mechanical energy in the form of acoustic power pushes working media to perform high-speed reciprocating motion with specific frequency in the pyroelectric power generation-engine, the pyroelectric power generation-engine can generate an electric field with certain frequency, the electric field is transmitted to the electrocaloric refrigerator through a lead, as the electrocaloric refrigerator can be understood as numerous tiny isothermal-adiabatic processes during working, the working frequency of the system can be changed by changing the combination of the size structure of the system and the inflation pressure, thus under the dual action of an induction electric field generated by the pyroelectric power generation-engine and an alternating flow field of reciprocating motion, the electric card refrigerator utilizes the electric card effect to convey the heat of the external environment into the system, thereby realizing the refrigeration function. The heat buffer pipeline can enable the pyroelectric power generation-engine machine to be in a suitable material transition temperature zone and play a certain phase modulation role at the same time.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (8)
1. The utility model provides a thermoacoustic and pyroelectric electricity coupling driven electricity card refrigerating system which characterized in that: the heat-release electric power generation-engine heat regenerator comprises a heat-release electric power generation-engine and an electric card refrigerator, wherein a heat buffer pipeline is arranged between the heat-release electric power generation-engine and the electric card refrigerator, the heat-release electric power generation-engine and the electric card refrigerator are connected through a lead to form a loop, a heat-release electric body material which can be used as a heat regenerator material of the heat-release electric power generation-engine is filled in the heat-release electric power generation-engine, and the heat-release electric body material comprises a single crystal material, a high-molecular organic polymer and a composite material, polyvinylidene fluoride, a metal oxide ceramic and a film material.
2. The thermoacoustic and pyroelectric electrically coupled driven electrical card refrigeration system of claim 1 wherein: the working temperature range of the pyroelectric power generation-engine is 0-1000 ℃.
3. The thermoacoustic and pyroelectric electrically coupled driven electrical card refrigeration system of claim 2 wherein: the pyroelectric power generation-engine comprises a first heat exchanger, a pyroelectric power generation-engine heat regenerator and a second heat exchanger, the pyroelectric power generation-engine heat regenerator is arranged between the first heat exchanger and the second heat exchanger, the heat exchange temperature of the first heat exchanger is lower than that of the second heat exchanger, the thermal buffer pipeline is arranged between the second heat exchanger and the electric card refrigerator, and the pyroelectric material is filled in the pyroelectric power generation-engine heat regenerator according to the gradual change rule of a temperature zone.
4. The thermoacoustic and pyroelectric electrically coupled driven electrical card refrigeration system of claim 3, wherein: the electric card refrigerator comprises a third heat exchanger, an electric card heat regenerator and a fourth heat exchanger, wherein the electric card heat regenerator is arranged between the third heat exchanger and the fourth heat exchanger, the heat exchange temperature of the third heat exchanger is lower than that of the second heat exchanger, the heat exchange temperature of the third heat exchanger is higher than that of the fourth heat exchanger, a thermal buffer pipeline is arranged between the third heat exchanger and the second heat exchanger, and ferroelectric materials are filled in the electric card heat regenerator according to the gradual change rule of a temperature zone.
5. The thermoacoustic and pyroelectric electrically coupled driven electric card refrigeration system according to any one of claims 1-4, characterized in that: the heat buffering pipe is characterized by further comprising a pipe body, working media are filled in the pipe body, the pyroelectric power generation-engine and the electric card refrigerator are both arranged in the pipe body, a pipe section between the pyroelectric power generation-engine and the electric card refrigerator is the heat buffering pipe, and the working media are gas and/or liquid.
6. The thermoacoustic and pyroelectric electrically coupled driven electrical card refrigeration system of claim 5, wherein: the tube body comprises an annular tube and a resonance tube, the resonance tube is communicated with the annular tube, the pyroelectric power generation-engine is arranged in the annular tube, and the electric card refrigerator is arranged in the resonance tube.
7. The thermoacoustic and pyroelectric electrically coupled driven electrical card refrigeration system of claim 6, wherein: and a secondary heat exchanger is arranged in the heat buffer pipeline.
8. The thermoacoustic and pyroelectric electrically coupled driven electrical card refrigeration system of claim 1 wherein: the electric card refrigerating system driven by thermoacoustic and pyroelectric coupling is of a traveling wave type, standing wave type or U-shaped structure.
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| CN111256387B (en) * | 2020-01-21 | 2021-10-15 | 中国科学院理化技术研究所 | Combined cooling, heating and power system based on thermoacoustic effect and pyroelectric effect |
| CN111271189B (en) * | 2020-02-18 | 2022-07-05 | 中国科学院理化技术研究所 | Combined cooling heating and power system based on thermoacoustic effect and positive and negative electrocaloric effect |
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| NL6602744A (en) * | 1966-03-03 | 1967-09-04 | ||
| CN101706169B (en) * | 2009-11-16 | 2012-07-11 | 浙江大学 | Thermoacoustically-driven thermally-coupled two-stage pulse tube cooling system |
| JP5835353B2 (en) * | 2012-01-17 | 2015-12-24 | トヨタ自動車株式会社 | Thermoelectric generator |
| CN202470265U (en) * | 2012-03-09 | 2012-10-03 | 陈志明 | Compressor-free type air conditioner for automobile |
| CN103352817B (en) * | 2013-07-12 | 2015-04-15 | 中国科学院理化技术研究所 | Linear double-acting thermo-acoustic power generation system |
| CN103670974B (en) * | 2013-12-11 | 2016-03-30 | 中国科学院理化技术研究所 | Recycle the double-action heat and acoustic power generating system of cold energy and heat energy simultaneously |
| CN103808063B (en) * | 2014-02-14 | 2016-02-03 | 中国科学院理化技术研究所 | A kind of acoustic resonance type heat activated traveling wave thermoacoustic refrigeration system |
| CN107401852B (en) * | 2016-05-25 | 2019-07-19 | 中国科学院理化技术研究所 | Using the solid coolant machine of Thermoacoustic engine |
| CN106194358B (en) * | 2016-08-10 | 2019-06-28 | 中国科学院理化技术研究所 | Multistage thermoacoustic generating set and multistage regenerative refrigerating system with the unit |
| CN106677920B (en) * | 2016-12-09 | 2018-02-06 | 中国科学院理化技术研究所 | A kind of double acting thermoacoustic generator conductive using liquid metal |
| CN106640565A (en) * | 2016-12-14 | 2017-05-10 | 中国科学院理化技术研究所 | System for driving thermo-acoustic heat pump by utilizing thermo-acoustic engine |
| CN108167147A (en) * | 2017-12-13 | 2018-06-15 | 中国科学院理化技术研究所 | A kind of tandem cold, heat electric shaft producting device |
| CN108180673B (en) * | 2017-12-21 | 2020-11-06 | 中国科学院理化技术研究所 | Loop heat-driven thermoacoustic refrigerating system |
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