CN107351645A - A kind of CO for combining auxiliary supercooling based on waste heat overbottom pressure2Automotive air-conditioning system - Google Patents

A kind of CO for combining auxiliary supercooling based on waste heat overbottom pressure2Automotive air-conditioning system Download PDF

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Publication number
CN107351645A
CN107351645A CN201710598751.1A CN201710598751A CN107351645A CN 107351645 A CN107351645 A CN 107351645A CN 201710598751 A CN201710598751 A CN 201710598751A CN 107351645 A CN107351645 A CN 107351645A
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CN
China
Prior art keywords
outlet connection
conditioning system
evaporator
thermoelectricity
gas cooler
Prior art date
Application number
CN201710598751.1A
Other languages
Chinese (zh)
Inventor
代宝民
刘圣春
刘坤
王海丹
李晓欢
张梦华
常虹
Original Assignee
天津商业大学
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Application filed by 天津商业大学 filed Critical 天津商业大学
Priority to CN201710598751.1A priority Critical patent/CN107351645A/en
Publication of CN107351645A publication Critical patent/CN107351645A/en

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60HARRANGEMENTS OR ADAPTATIONS OF HEATING, COOLING, VENTILATING, OR OTHER AIR-TREATING DEVICES SPECIALLY FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00Heating, cooling or ventilating [HVAC] devices
    • B60H1/00478Air-conditioning devices using the Peltier effect
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N5/00Exhaust or silencing apparatus combined or associated with devices profiting from exhaust energy
    • F01N5/02Exhaust or silencing apparatus combined or associated with devices profiting from exhaust energy the devices using heat
    • F01N5/025Exhaust or silencing apparatus combined or associated with devices profiting from exhaust energy the devices using heat the device being thermoelectric generators
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/10Internal combustion engine [ICE] based vehicles
    • Y02T10/16Energy recuperation from low temperature heat sources of the ICE to produce additional power

Abstract

The invention discloses a kind of CO based on the supercooling of waste heat overbottom pressure2Automotive air-conditioning system.CO of the present invention2Automotive air-conditioning system includes compressor, evaporator, gas cooler, expanding machine, thermoelectricity subcooler, thermal generator and engine;Evaporator outlet connects suction port of compressor, compressor outlet connection gas cooler entrance, gas cooler outlet connection thermoelectricity subcooler entrance, thermoelectricity subcooler outlet connection expander inlet, expander outlet connection evaporator inlet;Engine tracheae outlet connection thermal generator, expanding machine connection power supervisor, power supervisor control thermoelectricity subcooler and thermal generator respectively.The present invention, for driving thermoelectricity subcooler, improves the utilization rate of energy using the temperature difference of high-temperature tail gas and surrounding air output electric energy.

Description

A kind of CO for combining auxiliary supercooling based on waste heat overbottom pressure2Automotive air-conditioning system

Technical field

The present invention relates to semiconductor refrigerating technology and CO2Kind of refrigeration cycle field, more particularly to one kind are based on waste heat overbottom pressure mistake Cold CO2Automotive air-conditioning system.

Background technology

With the development of science and technology and society, using energy source and environmental protection problem have been to be concerned by more and more people.With The increase of automobile quantity, the discharge of vehicle exhaust are also more and more.Carbon monoxide, carbon dioxide in vehicle exhaust, nitrogen oxidation Compound etc. does a lot of damage to environment, produces greenhouse effects, damages the ozone layer.The temperature of the waste gas of Engine Exhaust Emission is high Up to 600-700 DEG C, 30%~45% energy causes the wave of energy as exhaust emissions is into air in engine fuel Take.Thus, to the recycling of residual heat of tail gas of automobile, the utilization of energy is largely improved.

Freezing with widely used CFCs, HCFCs refrigerant in heat pump assembly due to depletion of the ozone layer and greenhouse effect Should have a significant impact by eliminating, replace conventional refrigerants using HFCs classes refrigerant one after another.Used in orthodox car air-conditioning Refrigerant is R134a, although R134a ODP, which are 0, GWP, is but up to 1430, especially with family car quantity and day All to increase, automotive air-conditioning system is inevitably leaked and regularly replaced, and exacerbates the process of greenhouse effects.In April, 2014 European Union is proposed use of the tightened up F-gas regulation limits high GWP refrigerant in refrigeration air-conditioner, existing《The Kyoto Protocol》 HFCs is included in greenhouse gases list.World community is all accelerating the process of the environmentally friendly refrigerant replacement high GWP refrigerant of propulsion.

CO2As a kind of environmentally friendly working medium, the concern of people is received again with its plurality of advantages.

1)CO2To environment without destruction (ODP=0, GWP=1).2) unit volume refrigerating capacity is big, with common working medium phase Than CO2Equipment volume is small.3) carbon dioxide viscosity is low, and its flow losses is small, heat-transfer effect is good, has with lubricating oil good Compatibility.4) safety coefficient is high, nontoxic non-combustible, and chemical property is stable.5) it is cheap easily to obtain.

But CO2Some problems are still suffered from as novel refrigerant.CO2Critical-temperature be 31.1 DEG C, critical pressure is high Up to 7.38MPa, the operating pressure of system is very high.Due to the limitation of outdoor temperature condition, gas cooler exit temperature is higher, Slightly above environment temperature, restriction loss is bigger, causes the inefficient of whole system.

Therefore need to propose a kind of scheme to traditional CO2Cooling cycle system is improved, so as to improve the efficiency of system.

The content of the invention

Present invention aims at propose a kind of CO based on the supercooling of waste heat overbottom pressure2Automotive air-conditioning system, CO2System operation pressure Power is high.

In order to solve problem above, scheme proposed by the invention is:It is proposed a kind of CO based on the supercooling of waste heat overbottom pressure2Vapour Car air-conditioning system, CO2Automotive air-conditioning system includes compressor, evaporator, gas cooler, expanding machine, thermoelectricity subcooler, the temperature difference Generator and engine;Evaporator outlet connects suction port of compressor, compressor outlet connection gas cooler entrance, gas cooling Device outlet connection thermoelectricity subcooler entrance, thermoelectricity subcooler outlet connection expander inlet, expander outlet connection evaporator enter Mouthful;Engine tracheae outlet connection thermal generator, expanding machine connection power supervisor, power supervisor control thermoelectricity mistake respectively Cooler and thermal generator.Wherein power supervisor can use STC12C5410AD series integrated circuits.

In CO2In refrigeration system, the CO of gas-liquid two-phase2Fluid absorbs heat from evaporator, is HTHP into compressor compresses Gas, into gas cooler to surrounding environment heat release, now CO2The exothermic temperature of fluid is slightly above environment temperature, Ran Houchao Critical CO2Fluid is further cooled to cryogenic high pressure fluid into thermoelectricity subcooler, is changed into low after expanding machine externally does work The gas-liquid two-phase fluid of warm low pressure, until entering evaporator absorbs heat, complete whole kind of refrigeration cycle.

CO2For supercritical fluid when by expanding machine, externally acting exports electric energy;On the other hand, arranged by manifold The high-temperature tail gas gone out enters thermal generator, and electric energy is exported using the temperature difference of high-temperature tail gas waste heat and surrounding environment.Both Electric energy is together stored in power supervisor.Reasonable distribution is carried out by power supervisor, for driving thermoelectricity subcooler to realize CO2Cross Cold, unnecessary other in-car electrical equipments of electric energy supply use.The cooperation of several parts is increased operation rate and system more than Performance.

The present invention has the advantages and positive effects of:

1), the system uses natural refrigerant CO2, ODP=0, GWP=1;Refrigerating effect per unit swept volume is big so that CO2Equipment body Product is small, is not take up interior space;Nontoxic non-combustible, safety coefficient is high, cheap easily to obtain.

2), thermoelectricity subcooler is the semiconductor cooling device based on peltier effect, is powered and freezes, is subcooled using thermoelectricity Device exports CO to air cooler2Fluid is subcooled, and improves refrigerating capacity, and then improve the COP of system.

3)、CO2In kind of refrigeration cycle, CO2The operating pressure of working medium is high, replaces choke valve effectively to reclaim section with expanding machine Process losses are flowed, while can externally export electric energy.

4), the high-temperature tail gas waste heat of engine emission is effectively utilized by thermal generator.Utilize high-temperature tail gas Electric energy is exported with the temperature difference of surrounding air, for driving thermoelectricity subcooler, improves the utilization rate of energy.

By cooperating for several processes above, the utilization of energy and the efficiency of system can be effectively improved.

Brief description of the drawings

Fig. 1 is the theory diagram of present system.

In figure:1st, compressor;2nd, gas cooler;3rd, evaporator;4th, expanding machine;5th, thermoelectricity subcooler;6th, thermo-electric generation Module;7th, engine;8th, power supervisor.

Embodiment

For present disclosure, feature and effect can be further appreciated that, following examples are hereby enumerated, and coordinate accompanying drawing detailed It is described as follows:

Fig. 1 is a kind of CO based on waste heat supercooling2Automotive air-conditioning system.Its core is thermoelectricity subcooler, whole CO2Refrigeration System includes compressor, evaporator, gas cooler, expanding machine, thermal generator, power supervisor and thermoelectricity subcooler.

A kind of as shown in figure 1, CO based on waste heat supercooling2Automotive air-conditioning system, CO2Automotive air-conditioning system includes compressor 1st, evaporator 3, gas cooler 2, expanding machine 4, thermoelectricity subcooler 5, thermal generator 6 and engine 7;The outlet of evaporator 3 connects The entrance of compressor 1, the outlet of the compressor 1 connection entrance of gas cooler 2 are connect, the outlet of gas cooler 2 connection thermoelectricity subcooler 5 enters Mouthful, the outlet of the thermoelectricity subcooler 5 connection entrance of expanding machine 4, the outlet of the expanding machine 4 connection entrance of evaporator 3;The tracheae of engine 7 exports Thermal generator 6 is connected, expanding machine 4 connects power supervisor 8, and power supervisor 8 controls thermoelectricity subcooler 5 and the temperature difference to send out respectively Motor 6.Wherein power supervisor 8 can use STC12C5410AD series integrated circuits.

The present embodiment is on the CO that is subcooled based on waste heat overbottom pressure2The operation principle of automotive air-conditioning system is:

First stage:Gas-liquid two-phase CO2Fluid enters 1 (compressor) boil down to HTHP after 3 (evaporators) heat absorption Gas, subsequently into 2 (gas coolers) to surrounding environment heat release, now CO2The temperature of fluid is slightly above environment temperature.

Second stage:The CO that 5 (thermoelectricity subcoolers) export from air cooler2Heat is absorbed in fluid, is realized to CO2Supercooling, Now CO2For the gas of cryogenic high pressure.

Phase III:The gas of cryogenic high pressure enters 4 (expanding machines), and externally acting output electrical power storage is in power management In device.

Fourth stage:The high-temperature tail gas that manifold comes out enters 6 (thermal generators), utilizes tail gas and surrounding environment Thermo-electric generation externally exports electric energy, coordinates the distribution of electric energy by power supervisor, for driving thermoelectricity subcooler or supplying it He uses equipment.

5th stage:Low-temp low-pressure two-phase fluid after expansion work is again introduced into evaporator so as to complete whole system Circulation.

Although the preferred embodiments of the present invention are described above in conjunction with accompanying drawing, the invention is not limited in upper The embodiment stated, above-mentioned embodiment is only schematical, be not it is restricted, this area it is common Technical staff in the case of present inventive concept and scope of the claimed protection is not departed from, may be used also under the enlightenment of the present invention By make it is many in the form of, these are belonged within protection scope of the present invention.

Claims

A kind of 1. CO based on the supercooling of waste heat overbottom pressure2Automotive air-conditioning system, it is characterized in that, CO2Automotive air-conditioning system includes pressure Contracting machine, evaporator, gas cooler, expanding machine, thermoelectricity subcooler, thermal generator and engine;The outlet of evaporator 3 connection pressure Contracting machine entrance, compressor outlet connection gas cooler entrance, gas cooler outlet connection thermoelectricity subcooler entrance, thermoelectricity mistake Cooler outlet connection expander inlet, the outlet of expanding machine 4 connection evaporator inlet;Engine tracheae outlet connection thermo-electric generation Machine, expanding machine connection power supervisor, power supervisor control thermoelectricity subcooler and thermal generator respectively.

2. the CO according to claim 1 based on the supercooling of waste heat overbottom pressure2Automotive air-conditioning system, it is characterized in that, it is described Power supervisor uses STC12C5410AD series integrated circuits.

Claims (2)

  1. A kind of 1. CO based on the supercooling of waste heat overbottom pressure2Automotive air-conditioning system, it is characterized in that, CO2Automotive air-conditioning system includes compression Machine, evaporator, gas cooler, expanding machine, thermoelectricity subcooler, thermal generator and engine;Evaporator outlet connection compression Machine entrance, compressor outlet connection gas cooler entrance, gas cooler outlet connection thermoelectricity subcooler entrance, thermoelectricity supercooling Device outlet connection expander inlet, expander outlet connection evaporator inlet;Engine tracheae outlet connection thermal generator, it is swollen Swollen machine connects power supervisor, and power supervisor controls thermoelectricity subcooler and thermal generator respectively.
  2. 2. the CO according to claim 1 based on the supercooling of waste heat overbottom pressure2Automotive air-conditioning system, it is characterized in that, the power supply pipe Reason device uses STC12C5410AD series integrated circuits.
CN201710598751.1A 2017-07-21 2017-07-21 A kind of CO for combining auxiliary supercooling based on waste heat overbottom pressure2Automotive air-conditioning system CN107351645A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710598751.1A CN107351645A (en) 2017-07-21 2017-07-21 A kind of CO for combining auxiliary supercooling based on waste heat overbottom pressure2Automotive air-conditioning system

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CN201710598751.1A CN107351645A (en) 2017-07-21 2017-07-21 A kind of CO for combining auxiliary supercooling based on waste heat overbottom pressure2Automotive air-conditioning system

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101449116A (en) * 2006-06-08 2009-06-03 大金工业株式会社 Refrigeration device
CN105737439A (en) * 2016-03-28 2016-07-06 广东志高空调有限公司 Air conditioner system utilizing solar energy and thermoelectricity supercooling device
CN106671741A (en) * 2017-01-24 2017-05-17 天津商业大学 Automobile air conditioning system with carbon dioxide transcritical refrigeration cycle
CN106766361A (en) * 2017-01-24 2017-05-31 天津商业大学 A kind of refrigerator car energy-saving and environmental-friendly refrigeration system reclaimed based on engine exhaust heat
CN106802022A (en) * 2017-03-28 2017-06-06 天津商业大学 A kind of carbon dioxide thermoelectricity subcooler
CN106839488A (en) * 2017-03-28 2017-06-13 天津商业大学 Thermoelectricity subcooler expanding machine joint auxiliary supercooling CO2Transcritical cooling system
CN207257289U (en) * 2017-07-21 2018-04-20 天津商业大学 A kind of CO for combining auxiliary supercooling based on waste heat overbottom pressure2Automotive air-conditioning system

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101449116A (en) * 2006-06-08 2009-06-03 大金工业株式会社 Refrigeration device
CN105737439A (en) * 2016-03-28 2016-07-06 广东志高空调有限公司 Air conditioner system utilizing solar energy and thermoelectricity supercooling device
CN106671741A (en) * 2017-01-24 2017-05-17 天津商业大学 Automobile air conditioning system with carbon dioxide transcritical refrigeration cycle
CN106766361A (en) * 2017-01-24 2017-05-31 天津商业大学 A kind of refrigerator car energy-saving and environmental-friendly refrigeration system reclaimed based on engine exhaust heat
CN106802022A (en) * 2017-03-28 2017-06-06 天津商业大学 A kind of carbon dioxide thermoelectricity subcooler
CN106839488A (en) * 2017-03-28 2017-06-13 天津商业大学 Thermoelectricity subcooler expanding machine joint auxiliary supercooling CO2Transcritical cooling system
CN207257289U (en) * 2017-07-21 2018-04-20 天津商业大学 A kind of CO for combining auxiliary supercooling based on waste heat overbottom pressure2Automotive air-conditioning system

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