CN105650943A - Phase-change heat storage type carbon dioxide air source solar-assisted heat pump - Google Patents

Phase-change heat storage type carbon dioxide air source solar-assisted heat pump Download PDF

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Publication number
CN105650943A
CN105650943A CN201610204411.1A CN201610204411A CN105650943A CN 105650943 A CN105650943 A CN 105650943A CN 201610204411 A CN201610204411 A CN 201610204411A CN 105650943 A CN105650943 A CN 105650943A
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CN
China
Prior art keywords
heat
phase
carbon dioxide
heat pump
change
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201610204411.1A
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Chinese (zh)
Inventor
王晓磊
康喆
徐博睿
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Tianjin Zhongshi Ruizhe Technology Co Ltd
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Tianjin Zhongshi Ruizhe Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
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Application filed by Tianjin Zhongshi Ruizhe Technology Co Ltd filed Critical Tianjin Zhongshi Ruizhe Technology Co Ltd
Priority to CN201610204411.1A priority Critical patent/CN105650943A/en
Publication of CN105650943A publication Critical patent/CN105650943A/en
Pending legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B30/00Heat pumps
    • F25B30/02Heat pumps of the compression type
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24SSOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S60/00Arrangements for storing heat collected by solar heat collectors
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B30/00Heat pumps
    • F25B30/06Heat pumps characterised by the source of low potential heat
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B41/00Fluid-circulation arrangements
    • F25B41/20Disposition of valves, e.g. of on-off valves or flow control valves
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B47/00Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
    • F25B47/006Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass for preventing frost
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B2309/00Gas cycle refrigeration machines
    • F25B2309/06Compression machines, plant or systems characterised by the refrigerant being carbon dioxide
    • F25B2309/061Compression machines, plant or systems characterised by the refrigerant being carbon dioxide with cycle highest pressure above the supercritical pressure
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B2500/00Problems to be solved
    • F25B2500/28Means for preventing liquid refrigerant entering into the compressor
    • 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
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/40Solar thermal energy, e.g. solar towers

Abstract

A phase-change heat storage type carbon dioxide air source solar-assisted heat pump comprises a carbon dioxide air source heat pump and following parts connected sequentially in a loop through a line in which a heating medium flows: a phase-change heat storage tank internally fitted with a phase-change material, a solar enthalpy-increasing coil, a water pump and a vacuum tube solar collector; the solar enthalpy-increasing coil is embedded in an air cooler in the carbon dioxide air source heat pump for exchanging heat with a coil in the air cooler, the line at a heating medium inlet end of the vacuum tube solar collector is provided with a first electromagnetic valve, the line at a heating medium outlet end of the vacuum tube solar collector is provided with a second electromagnetic valve, and a heating medium outlet end of the water pump and a heating medium inlet end of the phase-change heat storage tank are also communicated through a line which is provided with a third electromagnetic valve. The defrosting problem of a carbon dioxide air source heat pump running in winter is solved, and a compressor is protected from liquid impact danger, reducing equipment failure rate and ensuring running stability of a system.

Description

Phase-change heat-storage carbon dioxide air solar energy heat pump
Technical field
The present invention relates to a kind of carbon dioxide air solar energy heat pump. Particularly relate to a kind of phase-change heat-storage carbon dioxide air solar energy heat pump.
Background technology
CO 2 cross-critical heat pump techniques, main by Trans-critical cycle compressor, expansion valve, air cooler, vaporizer forms, in Trans-critical cycle system, low-pressure section, the pressure of inspiration(Pi) of compressor is lower than critical pressure, and evaporating temperature is also below critical temperature, the endothermic process of circulation still carries out under undercritical conditions, and heat transfer process mainly relies on latent heat to complete. But the pressure at expulsion of compressor is higher than critical pressure, and at supercritical range, it does not have phase transformation, pressure and temperature is each independent parameter, overcomes the restriction that subcritical cycle is affected by environment. So, CO2 Trans-critical cycle kind of refrigeration cycle has an advantage of continuously adjustable cold within the specific limits, affected by environment not quite. This technology is mainly used in indoor heating refrigerating field.
CO 2 cross-critical air source heat pump, mainly by Trans-critical cycle compressor, expansion valve, water cooler, air cooler forms, and is a kind of air source heat pump utilizing CO 2 trans-critical heat pump technology.
Solar energy phase transition heat accumulation technology, mainly by solar thermal collector, containing the phase change heat storage tank of phase-change material, water pump, regulates valve, and water charging system is constituted, and utilizes the latent heat of phase change of phase-change material, uses when being stored by the solar energy that daytime is abundant for night or cloudy day.
Summary of the invention
The technical problem to be solved is to provide a kind of simple in construction, reliable phase-change heat-storage carbon dioxide air solar energy heat pump.
The technical solution adopted in the present invention is: a kind of phase-change heat-storage carbon dioxide air solar energy heat pump, include carbon dioxide air source heat pump, it is additionally provided with and has the pipeline of heat-carrying working medium to circulate connection successively by internal flow: the internal phase change heat storage tank equipped with phase-change material, solar energy increases enthalpy coil pipe, water pump and vacuum tube solar heating element, wherein, described solar energy increases enthalpy coil pipe and is embedded in the air cooler in the heat pump of carbon dioxide air source Nei for carrying out heat exchange with the coil pipe in described air cooler, the pipeline of the heat-carrying working medium arrival end of described vacuum tube solar heating element is provided with the first electromagnetic valve, the pipeline of the heat-carrying sender property outlet end of described vacuum tube solar heating element is provided with the second electromagnetic valve, it is connected also by pipeline between heat-carrying sender property outlet end and the heat-carrying working medium arrival end of described phase change heat storage tank of described water pump, this pipeline is provided with the 3rd electromagnetic valve.
The heat-carrying sender property outlet end of vacuum tube solar heating element is additionally provided with temperature sensor.
The phase-change heat-storage carbon dioxide air solar energy heat pump of the present invention, clean energy resource solar energy is utilized to increase enthalpy for the heat pump air cooler defrosting of carbon dioxide air source, when the heat obtained by solar heat-preservation is for heating in the winter time be the heat pump air cooler defrosting of carbon dioxide air source and increase air cooler outlet carbon dioxide-vapor mass dryness fraction, ensure that the carbon dioxide entering compressor is superheated steam, prevent compressor liquid hammer, improve compressor air suction enthalpy, reduce compressor work consuming. The present invention not only solves defrosting problem during carbon dioxide air in winter source operation of heat pump, add carbon dioxide-vapor simultaneously and enter compressor mass dryness fraction, ensure that compressor is not dangerous by liquid hammer, reduce equipment failure rate, widen carbon dioxide air source heat pump use in winter scope, improve efficiency during worst cold case carbon dioxide air source heat pump heat supply in winter, it is ensured that the stability that system is run.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of phase-change heat-storage carbon dioxide air solar energy heat pump of the present invention.
In figure
1: carbon dioxide air source heat pump 2: vacuum tube solar heating element
3: solar energy increases enthalpy coil pipe 4: water pump
5: air cooler 6: phase change heat storage tank
7: the first electromagnetic valve 8: the second electromagnetic valves
9: the three electromagnetic valves 10: temperature sensor
Detailed description of the invention
Below in conjunction with embodiment and accompanying drawing, the phase-change heat-storage carbon dioxide air solar energy heat pump of the present invention is described in detail.
As shown in Figure 1, the phase-change heat-storage carbon dioxide air solar energy heat pump of the present invention, include carbon dioxide air source heat pump 1, it is additionally provided with and has the pipeline of heat-carrying working medium to circulate connection successively by internal flow: the internal phase change heat storage tank 6 equipped with phase-change material, solar energy increases enthalpy coil pipe 3, water pump 4 and vacuum tube solar heating element 2, wherein, described solar energy increases enthalpy coil pipe 3 and is embedded in the air cooler 5 in carbon dioxide air source heat pump 1 for carrying out heat exchange with the coil pipe in described air cooler 5, defrosting increases enthalpy, the pipeline of the heat-carrying working medium arrival end of described vacuum tube solar heating element 2 is provided with the first electromagnetic valve 7, the pipeline of the heat-carrying sender property outlet end of described vacuum tube solar heating element 2 is provided with the second electromagnetic valve 8, the heat-carrying sender property outlet end of vacuum tube solar heating element 2 is additionally provided with temperature sensor 10. it is connected also by pipeline between heat-carrying sender property outlet end and the heat-carrying working medium arrival end of described phase change heat storage tank 6 of described water pump 4, this pipeline is provided with the 3rd electromagnetic valve 9.
First described electromagnetic valve the 7, second electromagnetic valve the 8, the 3rd electromagnetic valve 9 and temperature sensor 10 connection control system respectively, control system controls the aperture of first electromagnetic valve the 7, second electromagnetic valve the 8, the 3rd electromagnetic valve 9 by the temperature that temperature sensor 10 is fed back.
In embodiments of the invention, phase-change material in phase change heat storage tank 6 is according to carbon dioxide operation characteristic, in conjunction with solar energy service condition, select Na2SO4 10H2O as phase-change material, phase transition temperature 32 DEG C, latent heat of phase change 267kJ/kg, heat-carrying working medium selects ethylene glycol solution, winter operation, during daytime, ethylene glycol solution is heated to 40 DEG C by vacuum tube solar heating element 2, enter phase change heat storage tank 6 and pass through coil heat exchange with phase-change material Na2SO4 10H2O therein, phase-change material Na2SO4 10H2O is heated thawing, after heat exchange, ethylene glycol solution enters solar energy increasing enthalpy coil pipe 3, heat exchange is carried out with the coil pipe in the air cooler 5 in carbon dioxide air source heat pump 1, defrosting increases enthalpy, vacuum tube solar heating element 2 is entered by water pump 4 after heat exchange, absorb solar energy.Night in winter, close first electromagnetic valve 7 and second electromagnetic valve 8 at vacuum tube solar heating element 2 two ends, carry out internal defrosting at night, only by water pump 4, by heat-carrying working medium ethylene glycol solution and phase-change material Na2SO4 10H2O heat exchange, absorb and store heat, increase enthalpy for air cooler 5 defrosting in carbon dioxide air source heat pump 1.

Claims (2)

1. a phase-change heat-storage carbon dioxide air solar energy heat pump, include carbon dioxide air source heat pump (1), it is characterized in that, it is additionally provided with and has the pipeline of heat-carrying working medium to circulate connection successively by internal flow: the internal phase change heat storage tank (6) equipped with phase-change material, solar energy increases enthalpy coil pipe (3), water pump (4) and vacuum tube solar heating element (2), wherein, described solar energy increases enthalpy coil pipe (3) and is embedded in the air cooler (5) in carbon dioxide air source heat pump (1) Nei for carrying out heat exchange with the coil pipe in described air cooler (5), the pipeline of the heat-carrying working medium arrival end of described vacuum tube solar heating element (2) is provided with the first electromagnetic valve (7), the pipeline of the heat-carrying sender property outlet end of described vacuum tube solar heating element (2) is provided with the second electromagnetic valve (8), it is connected also by pipeline between heat-carrying sender property outlet end and the heat-carrying working medium arrival end of described phase change heat storage tank (6) of described water pump (4), this pipeline is provided with the 3rd electromagnetic valve (9).
2. phase-change heat-storage carbon dioxide air solar energy heat pump according to claim 1, it is characterised in that the heat-carrying sender property outlet end of vacuum tube solar heating element (2) is additionally provided with temperature sensor (10).
CN201610204411.1A 2016-03-31 2016-03-31 Phase-change heat storage type carbon dioxide air source solar-assisted heat pump Pending CN105650943A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106369846A (en) * 2016-08-29 2017-02-01 天津祥顺科技发展有限公司 Solar heat collector with phase change material heat storage module
CN106979544A (en) * 2017-04-07 2017-07-25 西安交通大学 A kind of air source inter-critical CO2Heat pump couples heating system with many fusing point phase-transition heat-storages
CN108302838A (en) * 2017-08-15 2018-07-20 东北电力大学 A kind of heat-storage solar energy coupling air source heat pump system and its control method
CN111059683A (en) * 2019-12-03 2020-04-24 珠海格力电器股份有限公司 Control method for preventing liquid impact of suction belt liquid of compressor and air conditioner

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CN102645055A (en) * 2012-05-16 2012-08-22 东南大学 Adaptively-matched solar auxiliary air source heat pump device
GB2488331A (en) * 2011-02-23 2012-08-29 Star Refrigeration Heat pump system with a thermal store comprising a phase change material
CN102705925A (en) * 2012-01-05 2012-10-03 王全龄 Dual-source heat pump air conditioner
CN202501683U (en) * 2012-03-02 2012-10-24 山东宏力空调设备有限公司 Solar heat pipe condensation defrosting device
CN202835924U (en) * 2012-10-17 2013-03-27 湖南创化低碳环保科技有限公司 Waste heat recovery and recycle device adopting low temperature phase change heat storage
CN204987535U (en) * 2015-07-28 2016-01-20 北京辰威日晟节能科技有限公司 Energy storage formula air source heat pump unit
CN205655526U (en) * 2016-03-31 2016-10-19 天津众石睿哲科技有限责任公司 Phase -change thermal formula carbon dioxide air source solar thermal energy pump

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2488331A (en) * 2011-02-23 2012-08-29 Star Refrigeration Heat pump system with a thermal store comprising a phase change material
CN102705925A (en) * 2012-01-05 2012-10-03 王全龄 Dual-source heat pump air conditioner
CN202501683U (en) * 2012-03-02 2012-10-24 山东宏力空调设备有限公司 Solar heat pipe condensation defrosting device
CN102645055A (en) * 2012-05-16 2012-08-22 东南大学 Adaptively-matched solar auxiliary air source heat pump device
CN202835924U (en) * 2012-10-17 2013-03-27 湖南创化低碳环保科技有限公司 Waste heat recovery and recycle device adopting low temperature phase change heat storage
CN204987535U (en) * 2015-07-28 2016-01-20 北京辰威日晟节能科技有限公司 Energy storage formula air source heat pump unit
CN205655526U (en) * 2016-03-31 2016-10-19 天津众石睿哲科技有限责任公司 Phase -change thermal formula carbon dioxide air source solar thermal energy pump

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106369846A (en) * 2016-08-29 2017-02-01 天津祥顺科技发展有限公司 Solar heat collector with phase change material heat storage module
CN106979544A (en) * 2017-04-07 2017-07-25 西安交通大学 A kind of air source inter-critical CO2Heat pump couples heating system with many fusing point phase-transition heat-storages
CN106979544B (en) * 2017-04-07 2019-06-11 西安交通大学 A kind of air source inter-critical CO2Heat pump couples heating system with more fusing point phase-transition heat-storages
CN108302838A (en) * 2017-08-15 2018-07-20 东北电力大学 A kind of heat-storage solar energy coupling air source heat pump system and its control method
CN111059683A (en) * 2019-12-03 2020-04-24 珠海格力电器股份有限公司 Control method for preventing liquid impact of suction belt liquid of compressor and air conditioner
CN111059683B (en) * 2019-12-03 2021-04-02 珠海格力电器股份有限公司 Control method for preventing liquid impact of suction belt liquid of compressor and air conditioner

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Application publication date: 20160608

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