CN104315748A - Heat energy driven looped traveling-wave thermo-acoustic heat pump with flow guiders - Google Patents
Heat energy driven looped traveling-wave thermo-acoustic heat pump with flow guiders Download PDFInfo
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- CN104315748A CN104315748A CN201410526732.4A CN201410526732A CN104315748A CN 104315748 A CN104315748 A CN 104315748A CN 201410526732 A CN201410526732 A CN 201410526732A CN 104315748 A CN104315748 A CN 104315748A
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- heat pump
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- heat exchanger
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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
- F25B27/00—Machines, plants or systems, using particular sources of energy
- F25B27/02—Machines, plants or systems, using particular sources of energy using waste heat, e.g. from internal-combustion engines
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03G—SPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
- F03G7/00—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for
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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
- F25B30/00—Heat pumps
- F25B30/06—Heat pumps characterised by the source of low potential heat
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03G—SPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
- F03G7/00—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for
- F03G2007/007—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for using heat pumps
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/27—Relating to heating, ventilation or air conditioning [HVAC] technologies
- Y02A30/274—Relating to heating, ventilation or air conditioning [HVAC] technologies using waste energy, e.g. from internal combustion engine
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
Abstract
The invention discloses a heat energy driven looped traveling-wave thermo-acoustic heat pump with flow guiders. The heat energy driven looped traveling-wave thermo-acoustic heat pump is of a loop which is formed by connecting one or more thermo-acoustic engine units and one or more thermo-acoustic heat pump units in series in an end-to-end manner; each thermo-acoustic engine unit comprises an engine first flow guider, an engine cold-side heat exchanger, an engine heat regenerator, an engine heater, an engine second flow guider, a heat buffer tube, a secondary cold-side heat exchanger and an engine resonance tube which are connected sequentially; each thermo-acoustic heat pump unit comprises a heat pump first flow guider, a heat pump high-temperature-side heat exchanger, a heat pump heat regenerator, a heat pump cold-side heat exchanger, a heat pump second flow guider and a heat pump resonance tube which are connected sequentially. According to the heat energy driven looped traveling-wave thermo-acoustic heat pump with the flow guiders, no moving component exists, the structure is simple, and a heat pumping effect is obtained through directly driving by a low-grade heat source; in addition, heat pumping for heat sources with relatively low temperature can be carried out, and heat pumping for heat sources with relatively high temperature can also be realized, so that the grade of the heat sources is increased, and then, the heat sources are utilized.
Description
Technical field
The present invention relates to thermo-acoustic engine, particularly relate to a kind of hot sound heat pump of the capable ripple of the loop with air deflector of heat-driven.
Background technology
In recent years, thermo-acoustic engine is as the Novel hot Force system of complete movement-less part, because of the operating characteristic of its Oscillating flow and potential stability, reliability, long-life, employing to the nuisanceless working medium of environment, the advantages such as heat-driven can be adopted and the concern of extremely academia and industrial quarters, and achieved many breakthrough progress.The thermoacoustic machine engine that the people such as Backhaus and Swift of especially U.S.'s Loews-my Mo Si National Laboratory propose, the performance of thermo-acoustic engine is had significant raising, the efficiency that its heat energy is changed to mechanical energy can compare favourably with the efficiency of conventional heat engines (as internal combustion engine etc.).
The utilization of low grade heat energy (waste heat, solar energy etc.) is one of the study hotspot in present stage energy science and technology field.But the thermal source that current thermo-acoustic engine system many employings temperature is higher drives, this make its with the competition of conventional heat engines in cannot play himself advantage, and then significantly limit the practical space of thermo-acoustic technology.Therefore, how to reduce the important technology difficult problem that the starting of oscillation of thermoacoustic system and running temperature are hot sound fields, the thermoacoustic system that low-temperature heat source drives is one of recent important development direction, thermo-acoustic engine field.Meanwhile, in existing row ripple thermoacoustic system, after the heating-up temperature of thermoacoustic engine temperature end reduces, Effective power that system exports (finally by merit that load effectively utilizes) can decrease with the ratio of total sound merit in loop, thus greatly affects the thermal efficiency of thermoacoustic system.One of method solving this problem arranges multiple regenerator unit successively in the loop, amplifies step by step sound wave.But when the quantity of these tandem regenerator unit is greater than 2, existing traditional thermoacoustic system is difficult to realize suitable acoustic impedance at regenerator unit place, and this can cause Sonic heat changing inefficiency.In the case, want to export enough large sound merit, still needing to make up by improving heat source temperature, thus also just cannot be reached the object reducing heat source temperature well by the method increasing regenerator unit number.
Object of the present invention, just for the deficiency that existing thermo-acoustic technology exists, arranges multiple regenerator unit in the loop, and makes these regenerator unit be in suitable acoustic impedance condition, improves Sonic heat changing efficiency, thus reduces the requirement to driving heat source temperature.Specifically, propose a kind of hot sound heat pump of the capable ripple of the loop with air deflector comprising the heat-driven of multiple regenerator unit exactly, hot sound starting of oscillation can be realized and stable operation under the less driving temperature difference.
Summary of the invention
The invention provides a kind of hot sound heat pump of the capable ripple of the loop with air deflector of heat-driven, under the less driving temperature difference, realize hot sound starting of oscillation and stable operation, obtain pump thermal effect.
The capable ripple of the loop with the air deflector hot sound heat pump of described a kind of heat-driven is connected into loop by the hot sound heat pump unit head and the tail of the thermoacoustic engine unit of more than 1 or 1 and more than 1 or 1.
Described thermoacoustic engine unit comprises engine first air deflector, engine cool end heat exchanger, engine regenerator, engine heater, engine second air deflector, thermal buffer tube, secondary cool end heat exchanger, the engine resonance pipe that are connected in turn; Described hot sound heat pump unit comprises heat pump first air deflector, heat pump temperature end heat exchanger, heat pump regenerator, heat pump cool end heat exchanger, heat pump second air deflector, the heat pump resonatron that are connected in turn.
The cross-sectional area of described engine cool end heat exchanger, engine regenerator, engine heater is greater than the cross-sectional area of thermal buffer tube, secondary cool end heat exchanger, engine resonance pipe; The cross-sectional area of described heat pump temperature end heat exchanger, heat pump regenerator, heat pump cool end heat exchanger is greater than the cross-sectional area of heat pump resonatron.
Described engine first air deflector, engine second air deflector, heat pump first air deflector, heat pump second air deflector are the pyramidal structure with cellular flow passages, porosity is 0.4 ~ 0.9, the form in hole is circular hole or square hole, and the material of air deflector is copper, stainless steel or other hard high melting solids.
The both sides of described engine first air deflector, engine second air deflector, heat pump first air deflector, heat pump second air deflector are respectively equipped with woven wire.
The radial dimension of described thermoacoustic engine unit and hot sound heat pump unit and the size of local sound merit match, and the pipeline section that namely sound merit is larger, radial dimension is larger.
In the present invention, the sound merit produced in thermoacoustic engine unit, by the hot sound heat pump unit on same for Direct driver loop, obtains pump thermal effect.Compare existing hot sound heat pump, the present invention can utilize low-grade heat source Direct driver to obtain pump thermal effect, and movement-less part, structure is simple, and the long-term stability being more conducive to system is run.
The mechanical compression heat pump of tradition is by the limitation of hot working fluid physical property, and applicable temperature range is more limited; The range of application of absorption heat pump is also subject to the restriction of hot working fluid physical property and absorption system inherent shortcoming features such as () corrosivity of absorbent, easily crystallization.The pump hot temperature degree of the hot sound heat pump of the capable ripple of the loop with air deflector of described heat-driven is not by the restriction of these conditions, therefore pump hot temperature degree has the larger free degree, both pump heat can be carried out by the thermal source lower to temperature, to reach refrigeration or to heat purposes, also can realize pump heat by the thermal source higher to temperature, improve thermal source grade and then be used again.
Accompanying drawing explanation
Fig. 1 is the capable ripple of the loop with the air deflector hot sound heat pump structure schematic diagram of heat-driven;
Fig. 2 is the STRUCTURE DECOMPOSITION figure of air deflector in the hot sound heat pump of the capable ripple of the loop with air deflector that can drive;
In figure: thermoacoustic engine unit 1, engine first air deflector 101, engine cool end heat exchanger 102, engine regenerator 103, engine heater 104, engine second air deflector 105, thermal buffer tube 106, secondary cool end heat exchanger 107 and engine resonance pipe 108; Hot sound heat pump unit 2, heat pump first air deflector 201, heat pump temperature end heat exchanger 202, heat pump regenerator 203, heat pump cool end heat exchanger 204 and heat pump second air deflector 205, heat pump resonatron 206.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention will be further described.
As shown in Figure 1, 2, a kind of capable ripple of the loop with air deflector hot sound heat pump of heat-driven is connected into loop by hot sound heat pump unit 2 head and the tail of the thermoacoustic engine unit 1 of more than 1 or 1 and more than 1 or 1.
Described thermoacoustic engine unit 1 comprises engine first air deflector 101, engine cool end heat exchanger 102, engine regenerator 103, engine heater 104, engine second air deflector 105, thermal buffer tube 106, secondary cool end heat exchanger 107, the engine resonance pipe 108 that are connected in turn; Described hot sound heat pump unit 2 comprises heat pump first air deflector 201, heat pump temperature end heat exchanger 202, heat pump regenerator 203, heat pump cool end heat exchanger 204, heat pump second air deflector 205, the heat pump resonatron 206 that are connected in turn.
The cross-sectional area of described engine cool end heat exchanger 102, engine regenerator 103, engine heater 104 is greater than the cross-sectional area of thermal buffer tube 106, secondary cool end heat exchanger 107, engine resonance pipe 108; The cross-sectional area of described heat pump temperature end heat exchanger 202, heat pump regenerator 203, heat pump cool end heat exchanger 204 is greater than the cross-sectional area of heat pump resonatron 206.
Described engine first air deflector 101, engine second air deflector 105, engine first air deflector 201, engine second air deflector 205 are for having the pyramidal structure of cellular flow passages, porosity is 0.4 ~ 0.9, the form in hole is circular hole or square hole, and the material of air deflector is copper, stainless steel or other hard high melting solids.
The both sides of described engine first air deflector 101, engine second air deflector 105, heat pump first air deflector 201, heat pump second air deflector 205 are respectively equipped with woven wire.
The radial dimension of described thermoacoustic engine unit 1 and hot sound heat pump unit 2 and the size of local sound merit match, and the pipeline section that namely sound merit is larger, radial dimension is larger.
Embodiment:
Gas or their gas mixtures such as the working medium that the present invention uses is helium, argon gas, carbon dioxide.
Thermoacoustic engine unit in loop and hot sound heat pump unit can be arranged one or more in theory.The present embodiment comprises three thermoacoustic engine unit 1 and a hot sound heat pump unit 2, and these four unit head and the tail are connected into loop.
There are 6 isodiametric circular holes one end of engine first air deflector 101, engine second air deflector 105, heat pump first air deflector 201, heat pump second air deflector 205.These circular holes are conical through-holes, and therefore the other end also has 6 isodiametric circular holes.The two ends of engine first air deflector 101, engine second air deflector 105, heat pump first air deflector 201, heat pump second air deflector 205 are respectively coated with one deck stainless steel cloth.
When the hot sound heat pump of the capable ripple of the loop with air deflector of this heat-driven works, in three thermoacoustic engine unit 1, the Working medium gas in hot junction in engine heater 104 heating system, the Working medium gas of cold junction in engine cool end heat exchanger 102 cooling systems, so will set up thermograde gradually along engine regenerator 103.When this thermograde exceedes certain threshold value, due to thermic sound transition effects, the Working medium gas in system will produce self-oscillation, thus realize the conversion of heat energy to sound merit.Sound merit can gain step by step along clockwise direction in three thermoacoustic engine unit, and is reaching maximum after the 3rd thermoacoustic engine unit, then enters hot sound heat pump unit 2.In hot sound heat pump unit 2, due to thermoacoustic effect, heat from heat pump cool end heat exchanger 204 pump to heat pump temperature end heat exchanger 202, thus will reach pump thermal effect.
For the characteristic making the regenerator of thermoacoustic engine unit 1 and hot sound heat pump unit 2 have acoustic impedance, the ratio of the radial dimension of described hot sound core cell (comprising engine cool end heat exchanger 102, engine regenerator 103, engine heater 104 and heat pump temperature end heat exchanger 202, heat pump regenerator 203, heat pump cool end heat exchanger 204) and adjacent resonatron or thermal buffer tube (comprising thermal buffer tube 106, secondary cool end heat exchanger 107, engine resonance pipe 108 and heat pump resonatron 206) is 3 ~ 8.
Engine first air deflector 101, engine second air deflector 105, heat pump first air deflector 201, heat pump second air deflector 205 connect for the transition between the different parts of cross-sectional area, are intended to improve and amass flowing non-uniform phenomenon caused by sudden change and the backflow of inhibitory mutagenesis section by cross section of fluid channel.Described air deflector is placed on conical pipe inside, and be the pyramidal structure with cellular flow passages, porosity is 0.4 ~ 0.9.The form in hole can be taper hole, circular hole, square hole or other geometries.There is chamfering the gateway of runner, to reduce flow losses during fluid turnover air deflector.The material of air deflector can be copper, stainless steel or other hard high melting solids.The larger side of air deflector sectional area is covered with layer of metal silk screen, and this woven wire avoids air deflector and directly contacts with heat exchanger the heat exchanger section runner caused and block, fluid can also be made to spread before entering heat exchanger evenly.The less side of air deflector sectional area is also covered with layer of metal silk screen, injection stream when this woven wire inhibits fluid to flow out from this side.Air deflector can play a positive role.First, air deflector fluid can be made in the flowing at hot sound core cell place evenly.Owing to there is abrupt-change cross section, the flow resistance of hot sound core cell inside edge is greater than the flow resistance of center, and this can cause when fluid flows into hot sound core cell from resonatron, and center flow velocity is greater than edge flow velocity.The uneven meeting of this flow velocity makes the edge of hot sound core cell not be used effectively.Air deflector can address this problem.Secondly, air deflector can also suppress backflow.When fluid flows to hot sound core cell from resonatron, backflow can be produced at abrupt-change cross section place, cause flow losses.Air deflector refinement runner, increases the resistance of backflow, thus suppresses backflow.
The radial dimension of described one or more thermoacoustic engine unit is also inconsistent.Sound merit is gain step by step in thermoacoustic engine unit, and the ratio of the radial dimension between adjacent thermoacoustic engine unit is 1.2 ~ 1.5.The radial dimension of described one or more hot sound heat pump unit is also inconsistent.Sound merit decays step by step in thermoacoustic engine unit, and the radial dimension of each heat pump unit also reduces step by step with the decay of sound merit in each hot sound heat pump unit.The ratio of the radial dimension of adjacent hot sound heat pump unit is 0.6 ~ 0.8.In the present embodiment, the radial dimension of three each parts of thermoacoustic engine unit 1 increases step by step successively along the ratio clockwise in 1.3.This is because for the thermo-acoustic engine with loop structure, the acoustic impedance characteristic at regenerator place is that system has high performance key, and in the present invention, sound merit is gain step by step in three thermoacoustic engine unit 1, the gain step by step of above-mentioned radial dimension makes the distribution of the acoustic impedance in system more reasonable, be conducive to mating of sound field and acoustic impedance, improve Sonic heat changing efficiency and also reduce the loss of sound merit.
Finally should be noted that the above-mentioned description to embodiment can understand and apply the invention for ease of those skilled in the art.Person skilled in the art obviously easily can make various amendment to above-described embodiment, and General Principle described herein is applied in other embodiments and need not through performing creative labour.Therefore, the invention is not restricted to above-described embodiment, those skilled in the art are according to announcement of the present invention, and the improvement made for the present invention and amendment all should within protection scope of the present invention.
Claims (5)
1. the hot sound heat pump of the capable ripple of the loop with air deflector of heat-driven, is characterized in that: be connected into loop by hot sound heat pump unit (2) head and the tail of the thermoacoustic engine unit (1) of more than 1 or 1 and more than 1 or 1;
Described thermoacoustic engine unit (1) comprises engine first air deflector (101), engine cool end heat exchanger (102), engine regenerator (103), engine heater (104), engine second air deflector (105), thermal buffer tube (106), secondary cool end heat exchanger (107), the engine resonance pipe (108) that are connected in turn; Described hot sound heat pump unit (2) comprises heat pump first air deflector (201), heat pump temperature end heat exchanger (202), heat pump regenerator (203), heat pump cool end heat exchanger (204), heat pump second air deflector (205), the heat pump resonatron (206) that are connected in turn.
2. the hot sound heat pump of the capable ripple of the loop with air deflector of heat-driven as claimed in claim 1, is characterized in that: the cross-sectional area of described engine cool end heat exchanger (102), engine regenerator (103), engine heater (104) is greater than the cross-sectional area of thermal buffer tube (106), secondary cool end heat exchanger (107), engine resonance pipe (108); The cross-sectional area of described heat pump temperature end heat exchanger (202), heat pump regenerator (203), heat pump cool end heat exchanger (204) is greater than the cross-sectional area of heat pump resonatron (206).
3. the hot sound heat pump of the capable ripple of the loop with air deflector of heat-driven as claimed in claim 1, it is characterized in that: described engine first air deflector (101), engine second air deflector (105), heat pump first air deflector (201), heat pump second air deflector (205) are for having the pyramidal structure of cellular flow passages, the form in hole is circular hole or square hole, and the material of air deflector is copper, stainless steel or other hard high melting solids.
4. the hot sound heat pump of the capable ripple of the loop with air deflector of heat-driven as claimed in claim 1, is characterized in that: the both sides of described engine first air deflector (101), engine second air deflector (105), heat pump first air deflector (201), heat pump second air deflector (205) are respectively equipped with woven wire.
5. the hot sound heat pump of the capable ripple of the loop with air deflector of heat-driven as claimed in claim 1, it is characterized in that: the radial dimension of described thermoacoustic engine unit (1) and hot sound heat pump unit (2) and the size of local sound merit match, namely the pipeline section that sound merit is larger, radial dimension is larger.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410526732.4A CN104315748B (en) | 2014-10-09 | 2014-10-09 | Heat energy driven looped traveling-wave thermo-acoustic heat pump with flow guiders |
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| CN201410526732.4A CN104315748B (en) | 2014-10-09 | 2014-10-09 | Heat energy driven looped traveling-wave thermo-acoustic heat pump with flow guiders |
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| CN104847608A (en) * | 2015-04-09 | 2015-08-19 | 中国科学院理化技术研究所 | Flue gas waste heat multistage traveling wave thermoacoustic engine system |
| CN104863808A (en) * | 2015-04-03 | 2015-08-26 | 中国科学院理化技术研究所 | Multistage traveling wave thermoacoustic engine system for cascade utilization of high-temperature flue gas waste heat |
| CN105299951A (en) * | 2015-11-17 | 2016-02-03 | 中国科学院理化技术研究所 | Loop multistage acoustic power recovery type heat-driven traveling wave thermoacoustic refrigeration system |
| CN105865080A (en) * | 2016-05-24 | 2016-08-17 | 浙江大学 | Low-grade heat energy converter for thermo-acoustic drive |
| CN106549604A (en) * | 2016-11-01 | 2017-03-29 | 陈曦 | Based on thermoacoustic effect and the exhaust system and method for electret acoustic-electrical transducer |
| JP2018527551A (en) * | 2015-09-17 | 2018-09-20 | サウンドエナジー・ベー・フェーＳｏｕｎｄｅｎｅｒｇｙ Ｂ．Ｖ． | Thermoacoustic energy conversion system |
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| CN105299951A (en) * | 2015-11-17 | 2016-02-03 | 中国科学院理化技术研究所 | Loop multistage acoustic power recovery type heat-driven traveling wave thermoacoustic refrigeration system |
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| CN106549604A (en) * | 2016-11-01 | 2017-03-29 | 陈曦 | Based on thermoacoustic effect and the exhaust system and method for electret acoustic-electrical transducer |
| CN106549604B (en) * | 2016-11-01 | 2018-10-30 | 陈曦 | Exhaust system based on thermoacoustic effect and electret acoustic-electrical transducer and method |
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