CN101354204A - Triple supply method capable of implementing refrigeration, heating and heat water supply functions - Google Patents

Triple supply method capable of implementing refrigeration, heating and heat water supply functions Download PDF

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Publication number
CN101354204A
CN101354204A CNA2008100426583A CN200810042658A CN101354204A CN 101354204 A CN101354204 A CN 101354204A CN A2008100426583 A CNA2008100426583 A CN A2008100426583A CN 200810042658 A CN200810042658 A CN 200810042658A CN 101354204 A CN101354204 A CN 101354204A
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heat
water
valve
refrigeration
hot water
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CNA2008100426583A
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吕静
王伟峰
赵惠忠
周传煜
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University of Shanghai for Science and Technology
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University of Shanghai for Science and Technology
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Priority to CNA2008100426583A priority Critical patent/CN101354204A/en
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    • 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

The invention relates to a combined function method for realizing multiple functions of refrigeration and heating and the like. A tri-supply method for realizing refrigeration, heating and hot water supply of the invention integrates a solar-cooling-tube refrigerating system, a trans-critical CO2 heat-pump circulatory system and a hot water circulatory system. The combined function method of the invention, by combining a solar-cooling-tube absorption refrigerating system and a trans-critical CO2 heat-pump system and integrating the strength of the two independent system to recover the defects of each system, can meet the demands of refrigeration in summer and heat supply in winter as well as the demands of hot water supply all year round, and has not only great strength on environmental protection, but also promising potential of energy conservation. The combined function method, which integrates a heat-pump air-conditioner and a hot-water-supply system in one body, not only ensures the compact structure in the implementation of the whole method, but effectively increases utilization rate of equipment.

Description

A kind ofly realize freezing, heat the triple feeding method with heat water supply functions
Technical field
The present invention relates to a kind of joint dysfunction method that realizes multinomial functions such as freezing, heat.
Background technology
Because environmental problems such as global air temperature warming, unusual weather conditions are serious day by day, conventional primary energy (as oil, coal etc.) is petered out, environmental protection, energy-conservation and seek new forms of energy and become the great of present whole international community and urgent subject.
A large amount of at present freon family formula heat pump type air conditioning systems that use, summer, the thermal discharge of outdoor condenser was big, form localized heat and pollute, and the high more refrigerating efficiency of outside air temperature is low more, and energy consumption is high more; Northerly transition season or southern winter, when outside air temperature was lower, heat pump heat supply efficient was very low, needed to increase auxiliary electric heater unit and satisfied the demands, and energy consumption also increases greatly; In addition along with the raising of people's living standard, the demand of family life hot water is also increasing, its required energy consumption accounts for about 30% of family's total energy consumption, general employing electrical heating or combustion gas heating make hot water, air-conditioning system and hot water supply system are set up separately, utilization rate of equipment and installations is low, the cost height.
Solar cold pipe just can be finished solar energy adsorption/desorption kind of refrigeration cycle in a glass tube, it utilizes the solid adsorption refrigeration principle, adopt zeolite molecular sieve-water as absorption working pair to other working medium such as (also can adopt to) active carbon-methyl alcohol, adsorbent bed is filled compound adsorbent.Single solar cold pipe is exactly an energy conversion unit that integrates refrigeration, heat supply water.Adsorbent bed is by the compound adsorbent global formation, have heat and mass and adsorption/desorption performance preferably, its outer wall is double layer vacuum tube (glass outer tube and a glass inner tube), and the outside also has the glass bushing of a band selective coating, can also reduce heat waste greatly by efficient absorption solar energy.Be embedded with heat delivery line (SMIS heat pipe) at the adsorbent bed middle part, its interior heat transferring medium (cold water) that flows of absorption phase is lowered the temperature adsorbent bed rapidly, realizes the adsorbent bed efficient heat-collecting and the back efficiently radiates heat of keeping out of the sun in the sun.Condenser is positioned at the adsorbent bed bottom, be an individual layer package of connecting with condensation water tank (boiler), make refrigerant vapour fully obtain condensation by carrying out heat exchange with the condensation water tank cooling water, and make full use of the heat of condensation of cold-producing medium, provide the domestic hot-water with this heat.Evaporimeter is positioned at condenser, and cold-producing medium is housed in it, and in adsorbent when absorption cooling, the heat that the evaporation of evaporimeter by cold-producing medium absorbs chilled water in the evaporimeter water tank reaches the purpose of refrigeration, and this moment, cold was from the evaporimeter output of solar cold pipe.The structural representation of solar cold pipe is seen accompanying drawing 1, accompanying drawing 2.
The process of refrigerastion of solar cold pipe is: in the time of by day, adsorbent temperature raise after the solar cold pipe adsorbent bed was accepted solar radiation, bed inner refrigerant gas pressure rises, after reaching the cold-producing medium desorption temperature, the adsorbent bed temperature begins desorption, when the refrigerant vapour that comes out when desorption runs into condenser, because condenser temperature is lower than the saturation temperature of this moment under the pressure of cold-producing medium, so refrigerant vapour begins to carry out condensation on condenser, become the cold-producing medium of liquid, for the enforcing condensation effect, feed the cooling effect that cooling water is strengthened cold-producing medium at condenser, the condensation of refrigerant heat is outwards exported by hot water.Refrigerant liquid flows to evaporimeter by the self gravitation effect and stores.Constantly at dusk, solar radiation weakens, the adsorbent bed temperature of solar cold pipe begins to reduce, for its temperature can be reduced effectively fast, in the SMIS heat pipe, inject cold water, when the adsorbent bed temperature is reduced to the adsorbents adsorb temperature, refrigerant vapour around adsorbent in the adsorbent bed begins to adsorb, continuation along with adsorption process, the pressure of solar cold tube refrigerant steam reduces, when refrigerant vapour pressure is reduced to the saturated vapour pressure of liquid refrigerant in the evaporimeter, cold-producing medium in the evaporimeter begins vaporization, in the process of vaporization, need to absorb the latent heat of vaporization and keep vaporization, so produced refrigeration, the cold that evaporimeter is produced can be exported with chilled water, being transported to needs with cold place (as fan coil etc.), and the absorption refrigeration process is until the m seq adsorbent bed no longer till the absorption refrigeration agent steam.
CO 2As a kind of natural material, be comparatively desirable cold-producing medium, that its advantage is is nontoxic, do not fire, the ODP value is zero, greenhouse effects are less, cheap, need not reclaim, environment is free from side effects etc.Since 1866, to the thirties in 20th century, CO 2Subcritical cycle once was widely used, but because its efficient is lower, system works pressure height, reasons such as plant machinery requirement of strength height are replaced by afterwards freon system.
What is called is striden critical CO 2Circulation is meant CO 2Under the subcritical pressure condition, in evaporimeter, absorb heat, and under the supercritical pressure condition in gas cooler heat release (CO 2In this process, be always gaseous state and do not have condensation) circulation.Stride critical CO 2The exothermic process temperature of circulation is higher, and has a sizable temperature glide (about 80~100 ℃), is used for heat pump cycle and has special advantages.Studies show that under the same operating mode, (1) is heated to 60 ℃, CO with water from 10 ℃ 2Teat pump boiler is than electric heater and gas heater energy-conservation 75%; (2) CO 2Teat pump boiler can be produced the hot water that temperature reaches 90 ℃, and the hot water temperature of conventional heat pump system generally is lower than 55 ℃; (3) adopt CO 2Heat pump is commercial and residential housing hot-water supply, can make it always reduce 20% with energy; (4) CO 2Heat pump can be kept higher heating load under low temperature environment, save the auxiliary spent energy of firing equipment greatly.
Summary of the invention
Purpose of the present invention is exactly energy consumption and the equipment waste that solves the technical existence of present energy supply, provides a kind of and realize freezing, heats the triple feeding method with heat water supply functions.
The present inventor is by the abundant research to several energy supply technology pluses and minuses, think that solar cold pipe can only provide cold at night, this and common Modern Family are to the demand basically identical of cold, and summer is with cold, solar radiation is also stronger, and this makes solar cold pipe have feasibility in the use of family expenses field of air conditioning, and along with the development of technology, the reduction of solar cold pipe cost will make this technology more competitive.Solar cold pipe can also provide the domestic hot-water when cold is provided; When solar energy deficiency or rainy weather, availablely stride critical CO 2System realizes freezing and heating as assisting; Solar cold pipe can only night cooling, also can be when need cooling daytime by striding critical CO 2System's refrigeration.Therefore, if with solar cold pipe with stride critical CO 2Solar refrigeration, air-conditioning heat pump and hot-water supply system are promptly gathered in the ingenious associating of system, both can improve usage ratio of equipment, can realize environmental protection, energy-conservation effect again.
Of the present inventionly realize freezing, heat the triple feeding method with heat water supply functions, exactly with the solar cold pipe refrigeration system, stride critical CO 2Heat pump circulating system and hot water cyclesystem are connected together.
The solar cold pipe refrigeration system is used for refrigeration and produces hot water, strides critical CO 2Heat pump circulating system is used to heat, produce hot water, and hot water cyclesystem is used to provide hot water.
By realizing the solar cold guard system to the monitoring of outdoor temperature, humidity and striding critical CO 2The automatic switchover of system also can adopt manual mode to come control system.Method of the present invention can provide five kinds of operational modes: refrigeration+heat supply water, heat+heat supply water, separate refrigeration, heat separately, independent heat supply water, satisfy different weather conditions and user's different needs, realize collection energy-saving and environmental protection, compactness, be heat supply, air-conditioning and the hot water joint supply of one efficiently.
The solar cold pipe refrigeration system is the circulation line that room air heat exchanger 5, solar cold pipe 11, solar cold pipe cooling water heat exchanger 12, solar cold pipe chilled water heat exchanger 13, chilled water pump 14 and stop valve A15 connect to form by pipeline.Use required cold for satisfying the user, many cold pipes can be parallel to together, and chilled water heat exchanger and cooling water heat exchanger are set.The absorption working pair of solar cold pipe also can select for use other working medium such as active carbon-methyl alcohol right to selecting zeolite molecular sieve-water for use.
Stride critical CO 2Heat pump circulating system is: connect to form circulation line, CO with cross valve B7, choke valve 8, outdoor air heat exchanger 9, cross valve A2 successively after shutoff valve C 4 by pipeline series connection and hot water heat exchanger 6 and stop valve B3 that connects by pipeline and 5 parallel connections of room air heat exchanger 2Compressor 1, reservoir 10 and cross valve A2 connect into the circulation branch road by pipeline.The operating pressure of critical-cross carbon dioxide is 3.0-12.0MPa; Operating temperature can reach-20 ℃ at low temperature side, and high temperature side can reach 95 ℃; The circulation line of CO 2 trans-critical heat pump system and critical piece should satisfy the requirement of withstand voltage of 15MPa.
Hot water cyclesystem is the circulation line of forming by hot water heat exchanger 6, triple valve A16, stop valve D17, heat-exchanger pump 18, boiler 19, triple valve B20 and the solar cold pipe cooling water heat exchanger 12 of pipeline connection successively.
Beneficial effect of the present invention: the present invention is with the solar cold pipe adsorption refrigeration system and stride critical CO 2Heat pump associating has been given full play to solar cold pipe refrigeration in summer and the characteristics of hot water is provided and strides critical CO 2Heat pump cycle heats and provides the unique advantage of hot water aspect in the winter time, and the length that combines two autonomous systems remedies the deficiency of system separately.Can satisfy the refrigeration in summer and the heating in winter, can satisfy the heat supply water demand in annual each period again, not only aspect environmental protection, have very big advantage, and its energy-conservation potentiality be very big, also use the new forms of energy-solar energy of environmental protection.This method unites two into one heat pump air conditioner and hot-water supply system, not only makes whole method implement compact conformation, has also effectively improved usage ratio of equipment.
Description of drawings
Fig. 1 is the structural representation of solar cold pipe, wherein ↓ expression cold-producing medium on daytime trend, ↑ expression cold-producing medium at night trend
Fig. 2 is the cross section structure schematic diagram of solar cold pipe
Fig. 3 is for solar cold pipe and stride critical CO 2The structure principle chart of association system
Fig. 4 is the operational mode schematic diagram of solar cold guard system refrigeration+heat supply water in the association system, strides critical CO when simultaneously also being independent heat supply water, solar energy deficiency or rainy weather and when needing cooling daytime 2The operational mode schematic diagram of system's separate refrigeration.
Fig. 5 strides critical CO in the association system 2The operational mode schematic diagram of the heating of system+heat supply water, also be simultaneously heat separately, the operational mode schematic diagram of independent heat supply water when solar energy is not enough
The title of each Reference numeral is as follows among the figure:
111-SMIS heat pipe 112-glass inner tube 113-glass outer tube 114-glass bushing
115-adsorbent bed 116-condenser 117-evaporimeter 118-adsorbent passage
1-CO 2Compressor 2,7-cross valve A, B 3,4,15,17-stop valve A, B, C
5-room air heat exchanger 6-hot water heat exchanger 8-choke valve 9-outdoor air heat exchanger
10-reservoir 11-solar cold pipe 12-solar cold pipe cooling water heat exchanger
13-solar cold pipe chilled water heat exchange 14-chilled water pump 16,20-triple valve A, B
18-heat-exchanger pump 19-boiler
The specific embodiment
Embodiment 1
Of the present inventionly realize freezing, heat the triple feeding method with heat water supply functions, exactly with the solar cold pipe refrigeration system, stride critical CO 2Heat pump circulating system and hot water cyclesystem are connected together.One of concrete embodiment is as shown in Figure 3:
The solar cold pipe refrigeration system is the circulation line that room air heat exchanger 5, solar cold pipe 11, solar cold pipe cooling water heat exchanger 12, solar cold pipe chilled water heat exchanger 13, chilled water pump 14 and stop valve A15 connect to form by pipeline.The absorption working pair of solar cold pipe is to selecting zeolite molecular sieve-water for use.
Stride critical CO 2Heat pump circulating system is: connect to form circulation line, CO with cross valve B7, choke valve 8, outdoor air heat exchanger 9, cross valve A2 successively after shutoff valve C 4 by pipeline series connection and hot water heat exchanger 6 and stop valve B3 that connects by pipeline and 5 parallel connections of room air heat exchanger 2Compressor 1, reservoir 10 and cross valve A2 connect into the circulation branch road by pipeline.Circulation line and critical piece should satisfy the requirement of withstand voltage of 15MPa.
Hot water cyclesystem is the circulation line of forming by hot water heat exchanger 6, triple valve A16, stop valve D17, heat-exchanger pump 18, boiler 19, triple valve B20 and the solar cold pipe cooling water heat exchanger 12 of pipeline connection successively.
Solar cold pipe refrigeration system and stride critical CO 2The shared room air heat exchanger of heat pump circulating system, and link to each other with hot water cyclesystem by hot water heat exchanger respectively.
Method of the present invention is utilized three independently circulation lines: the solar cold pipe refrigeration system pipeline, stride critical CO 2Circulation line and hot water circulating pipeline can be realized freezing, heat, three kinds of functions of heat supply water according to different weather conditions and user's different needs by the cooperation between two subsystems and the different pipeline.Generally speaking, 5 kinds of mode of operations are arranged, be respectively: 1) refrigeration+heat supply water condition; 2) heat+the heat supply water condition; 3) separate refrigeration operating mode; 4) independent heating condition; 5) independent heat supply water condition.Introduced respectively below in conjunction with Fig. 3, Fig. 4, Fig. 5:
1) refrigeration+heat supply water condition
When fine, open solar cold guard system and hot-water heating system, CO 2System is in closed condition.
The passage a of triple valve A16, triple valve B20 is communicated with respectively with c among the hot water line, and stop valve A15, stop valve D17 are open-minded.
Daytime, adsorbent temperature raise after solar cold pipe adsorbent bed 11 was accepted solar radiation, after reaching the cold-producing medium desorption temperature, begin desorption, the refrigerant vapour that desorption comes out becomes liquid refrigerant in condenser condenses, by solar cold pipe cooling water heat exchanger 12 with the heat transferred cooling water, cooling water after the heating is sent to boiler 19 under the effect of heat-exchanger pump 18, outwards export as the domestic hot-water; Refrigerant liquid flows to evaporimeter by the self gravitation effect and stores.Night, there has not been solar radiation, and in the SMIS heat pipe, inject cold water, the temperature of solar cold pipe adsorbent bed 11 begins to reduce, when reducing to the adsorbents adsorb temperature, refrigerant vapour around adsorbent in the adsorbent bed begins to adsorb, carrying out along with adsorption process, solar cold tube refrigerant steam pressure reduces, when refrigerant vapour pressure is reduced to the saturated vapour pressure of liquid refrigerant in the evaporimeter, cold-producing medium in the evaporimeter begins vaporization, draw the heat of chilled water by solar cold pipe chilled water heat exchanger 13, so produced refrigeration, chilled water pump 14 is transported to room air heat exchanger 5 with chilled water, and cold is passed to indoor like this.The absorption refrigeration process is until the m seq adsorbent bed no longer till the absorption refrigeration agent steam.
When solar energy deficiency or rainy weather and when need freeze daytime, open and stride critical CO 2System, stop valve B3 opens, and shutoff valve C 4 is closed, and passage a, the d of cross valve A2 and b, c be UNICOM respectively, and passage a, the b of cross valve B7 and c, d be UNICOM respectively, and hot water (being the separate refrigeration operating mode) is not provided this moment.
This operating mode is generally at summer operation, and operation logic as shown in Figure 4.
2) heat+the heat supply water condition
Open CO 2System and hot-water heating system, the solar cold guard system is in not running status.
The passage a of triple valve A16, triple valve B20 is communicated with respectively with b among the hot water line, and passage a, the c of cross valve 2,7 and b, d be UNICOM respectively, and valve 3, valve 4, valve 17 are open-minded.
CO 2System is a transcritical operation, therefore has very big temperature glide, in gas cooler, can produce very big heat extraction, the part of this heat extraction is used in hot water heat exchanger 6 heat hot water, another part then carries out heat exchange with air in room air heat exchanger 5, heat transferred is indoor, reach the purpose of heating.
This operating mode is time operation in the winter time generally, and operation logic as shown in Figure 5.
3) separate refrigeration operating mode
Open the solar cold guard system and stride critical CO 2System, hot-water heating system is also opened simultaneously during daytime.
Valve 3 is opened, valve 4 cuts out, passage a, the d of cross valve 2 and b, c be UNICOM respectively, passage a, the b of cross valve 7 and c, d be UNICOM respectively, at this moment outdoor air heat exchanger 9 is equivalent to the gas cooler of system, room air heat exchanger 5 is equivalent to evaporimeter, and the passage a of triple valve 16,20 is communicated with respectively with c.
Cooling at night under this operating mode is realized that by the solar cold guard system in the time of the cold deficiency, critical CO is striden in operation 2System; Daytime, cooling was then by striding critical CO 2System realizes.Operation logic as shown in Figure 4.
4) independent heating condition
Only open separately and stride critical CO 2System, solar cold guard system and hot-water heating system are in not running status.
Valve 3 is opened, and valve 4 cuts out, and passage a, the c of cross valve 2,7 and b, d be UNICOM respectively, and at this moment outdoor air heat exchanger 9 is equivalent to the evaporimeter of system, and room air heat exchanger 5 is equivalent to gas cooler, and operation logic as shown in Figure 5.
5) independent heat supply water condition
At first open solar cold guard system and hot-water heating system, stride critical CO 2System is in not running status.
The passage a of triple valve 16,20 is communicated with respectively with c among the hot water line, and valve 17 is open-minded; Owing to do not need refrigeration, so chilled water pump 14 need not opened.This moment, hot water was provided by the solar cold guard system, and operation logic as shown in Figure 4.
When sunshine is not enough, then opens and stride critical CO 2The supply that system replenishes hot water.Need this moment to open to stride critical CO 2System, passage a, the c of cross valve 2,7 and b, d be UNICOM respectively, and the passage a of triple valve 16,20 is communicated with respectively with b among the hot water line, and valve 4, valve 17 are open-minded, and valve 3 cuts out.At this moment this system is equivalent to CO 2Teat pump boiler, CO 2The heat extraction of system all is used for heat hot water, and this process realizes that in hot water heat exchanger 6 outdoor air heat exchanger 9 is equivalent to the evaporimeter of system, and operation logic as shown in Figure 5.

Claims (9)

1. can realize freezing, heat the triple feeding method with heat water supply functions, this method is with the solar cold pipe refrigeration system, strides critical CO 2Heat pump circulating system and hot water cyclesystem are connected together.
2. as claimed in claim 1ly realize freezing, heat the triple feeding method with heat water supply functions, it is characterized in that the solar cold pipe refrigeration system is used for refrigeration and produces hot water, strides critical CO 2Heat pump circulating system is used to heat, produce hot water, and hot water cyclesystem is used to provide hot water.
3. as claimed in claim 1ly realize freezing, heat the triple feeding method with heat water supply functions, it is characterized in that, five kinds of operational modes can be provided: refrigeration+heat supply water, heat+heat supply water, separate refrigeration, heat separately, heat supply water separately.
4. as claimed in claim 1ly realize freezing, heat the triple feeding method with heat water supply functions, it is characterized in that the absorption working pair of solar cold pipe is to selecting for use zeolite molecular sieve-water or active carbon-methyl alcohol working medium right.
5. as claimed in claim 1ly realize freezing, heat the triple feeding method with heat water supply functions, it is characterized in that the operating pressure of critical-cross carbon dioxide is 3.0-12.0MPa.
6. as claimed in claim 1ly realize freezing, heat the triple feeding method with heat water supply functions, it is characterized in that the circulation line of CO 2 trans-critical heat pump system and parts need satisfy the requirement of withstand voltage of 15MPa.
7. as claimed in claim 1ly realize freezing, heat the triple feeding method with heat water supply functions, it is characterized in that the solar cold pipe refrigeration system is the circulation line that room air heat exchanger (5), solar cold pipe (11), solar cold pipe cooling water heat exchanger (12), solar cold pipe chilled water heat exchanger (13), chilled water pump (14) and stop valve A (15) connect to form by pipeline.
8. as claimed in claim 1ly realize freezing, heat the triple feeding method with heat water supply functions, it is characterized in that, stride critical CO 2Heat pump circulating system is: connect to form circulation line, CO with cross valve B (7), choke valve (8), outdoor air heat exchanger (9), cross valve A (2) successively after shutoff valve C (4) by pipeline series connection and hot water heat exchanger (6) and stop valve B (3) that connects by pipeline and room air heat exchanger (5) parallel connection 2Compressor (1), reservoir (10) and cross valve A (2) connect into the circulation branch road by pipeline.
9. as claimed in claim 1ly realize freezing, heat the triple feeding method with heat water supply functions, it is characterized in that hot water cyclesystem is the circulation line of forming by hot water heat exchanger (6), triple valve A (16), stop valve D (17), heat-exchanger pump (18), boiler (19), triple valve B (20) and the solar cold pipe cooling water heat exchanger (12) of pipeline connection successively.
CNA2008100426583A 2008-09-09 2008-09-09 Triple supply method capable of implementing refrigeration, heating and heat water supply functions Pending CN101354204A (en)

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CN102003830A (en) * 2010-11-05 2011-04-06 中国科学院广州能源研究所 Adsorption type refrigerator and compression type air-conditioner combined system
CN102141322A (en) * 2010-12-09 2011-08-03 山东大学 Absorption-mechanical compression coupling refrigeration and cold accumulation system
CN102494379A (en) * 2011-12-09 2012-06-13 上海理工大学 Transcritical CO2 heat-pump air-conditioning system with self-temperature-limiting electric heating belt
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CN102003830A (en) * 2010-11-05 2011-04-06 中国科学院广州能源研究所 Adsorption type refrigerator and compression type air-conditioner combined system
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CN102563960A (en) * 2010-12-20 2012-07-11 新奥科技发展有限公司 Solar combined cooling, heating and power system
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CN102494379A (en) * 2011-12-09 2012-06-13 上海理工大学 Transcritical CO2 heat-pump air-conditioning system with self-temperature-limiting electric heating belt
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CN102798250B (en) * 2012-08-30 2015-02-25 华北电力大学(保定) Double-heat-source trans-critical carbon-dioxide multifunctional heat-pump system
CN102798250A (en) * 2012-08-30 2012-11-28 华北电力大学(保定) Double-heat-source trans-critical carbon-dioxide multifunctional heat-pump system
CN105793638A (en) * 2013-07-25 2016-07-20 丹伯里资源公司 Method and apparatus for dampening flow variations and pressurizing carbon dioxide
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CN104057804A (en) * 2014-06-19 2014-09-24 上海理工大学 Automobile air conditioner system
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CN104990169B (en) * 2015-06-24 2018-09-11 广东美的暖通设备有限公司 A kind of Trans-critical cycle CO2Heat pump air conditioning system
CN109564009A (en) * 2016-07-19 2019-04-02 瑞典意昂公司 Heat transfer system
CN107894045A (en) * 2017-11-03 2018-04-10 广东美的暖通设备有限公司 Throttling control method, device and the air conditioner of air-conditioning system

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