CN109724293A - The CO of the absorption supercooling of Driven by Solar Energy2Trans-critical cycle double-stage compressive refrigerating system - Google Patents
The CO of the absorption supercooling of Driven by Solar Energy2Trans-critical cycle double-stage compressive refrigerating system Download PDFInfo
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- CN109724293A CN109724293A CN201910142693.0A CN201910142693A CN109724293A CN 109724293 A CN109724293 A CN 109724293A CN 201910142693 A CN201910142693 A CN 201910142693A CN 109724293 A CN109724293 A CN 109724293A
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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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/62—Absorption based systems
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Abstract
The invention discloses a kind of CO of the absorption supercooling of Driven by Solar Energy2Trans-critical cycle double-stage compressive refrigerating system.Driven by Solar Energy absorption system of the invention includes recirculation heater and absorption system, and the recirculation heater includes heat collector, heat storage tank, water pump.The absorption system includes evaporator-condenser, absorber, solution pump, throttle valve, solution heat exchanger, generator, condenser.For the CO to be subcooled2Trans-critical cycle double-stage compressive refrigerating system increases refrigerating capacity, improves system performance.The CO2Trans-critical cycle double-stage compressive refrigerating system includes cryogenic vaporizer, medium temperature evaporator, cryogenic compressor, high temperature compressor, compressors in parallel, gas cooler, Condensation-Evaporator, high-pressure throttle, gas-liquid separator, middle pressure throttle valve, low pressure throttle valve, by-passing valve.Two is system coupled, and the two complements each other, and solves summer because environment temperature increases CO2The problem of Two-stage Compression system performance reduces.
Description
Technical field
The present invention relates to refrigeration technology fields, and in particular to a kind of CO of the absorption supercooling of Driven by Solar Energy2Trans-critical cycle is double
Grade compression refrigerating system.
Background technique
Under the joint efforts of international community, country is made that corresponding promise to undertake to control in developed country and partial development
Depletion of the ozone layer and greenhouse effects, wherein the production of high " ODP " and high " GWP " industrial chemical product receive stringent limitation.
In industrial products, refrigerant obtained between past 100 years as the industrial products largely used in refrigeration and air-conditioning system
It is widely applied.Under the background based on control depletion of the ozone layer and greenhouse effects, the production and application of refrigerant are also by phase
The control answered.Currently, the HCFC class refrigerant largely used will be cut down before the year two thousand thirty to maintenance amount, part HFC class system
Cryogen may become middle transition product.Researcher summarizes, and the technical solution for solving refrigerant applications has two technology roads
Line, first technology path are to continue with research and development zero " ODP " and the artificial cooling agent of low " GWP " (such as R1234yf, R1234ze),
Another route is using natural refrigerant (such as NH3、CO2, propane, water etc.).Everybody is known together, final refrigerant
Scheme should be selection artificial cooling agent, especially NH3、CO2, propane, the refrigerants such as water will obtain in the following refrigeration system
It is widely applied.
CO2Its merits and demerits is used as refrigerant, its advantage is that the application particularly suitable for Teat pump boiler
Operating condition, it can be achieved that hot water instant heating, leaving water temperature can reach 55~65 DEG C, it might even be possible to realize higher temperature.But it is lacked
Point is also very distinct, and refrigerant system efficiency is low, system running pressure is high, and the high problem of certain operating pressure can be by equipment
Pressure vessel bearing capacity is improved in process to solve, and the low problem of running efficiency of system then cannot be by from solution
Certainly, it needs to CO2Refrigeration heat pump system, which improves, can just improve efficiency.It is common to improve CO2Transcritical cooling system efficiency
Method, which has, replaces throttle valve, extraction cycle, gas cooler outlet supercooling, mixed working fluid etc. using expanding machine.Wherein, using gas
The mode of body cooler outlet supercooling can effectively reduce system running pressure, improve system effectiveness, have better reality
Application value.In the method for gas cooler exit gas supercooling, the mode of supercooling may be selected to use one-stage steam compressed formula
The schemes such as refrigeration system, absorption system.
Summary of the invention
The technical problems to be solved by the present invention are: providing a kind of CO of absorption supercooling of Driven by Solar Energy2Trans-critical cycle is double
Grade compression refrigerating system increases refrigerating capacity, and improve system performance while reducing energy consumption.
In order to solve the above technical problems, the invention adopts the following technical scheme:
A kind of CO of the absorption supercooling of Driven by Solar Energy2Trans-critical cycle double-stage compressive refrigerating system, which is characterized in that the system
Cooling system includes Driven by Solar Energy absorption system and CO2Trans-critical cycle double-stage compressive refrigerating system；
The Driven by Solar Energy absorption system includes recirculation heater and absorption system, and the circulation adds
Hot device includes heat collector, heat storage tank, the absorption system include evaporator-condenser, absorber, solution pump, throttle valve,
Solution heat exchanger, generator, condenser；It is connect with above heat storage tank by being insulated water pipe above the heat collector, the storage
Hot water in hot tank is connect by pipeline with generator, and cooled water is pumped into below the heat storage tank by water pump one, the storage
Cold water is pumped by heat collector lower section by water pump two below hot tank, absorber outlet, solution pump, solution heat exchanger, generator,
Condenser is successively connected by pipeline from beginning to end, and the refrigerant liquid outlet of generator passes through setting solution heat exchanger and throttle valve
Piping connection absorber entrance；
The CO2Trans-critical cycle double-stage compressive refrigerating system includes cryogenic vaporizer, medium temperature evaporator, cryogenic compressor, height
Warm compressor, compressors in parallel, gas cooler, Condensation-Evaporator, high-pressure throttle, gas-liquid separator, middle pressure throttle valve,
Low pressure throttle valve, by-passing valve, the cryogenic vaporizer are connected in parallel after being connected in series with cryogenic compressor with medium temperature evaporator, and
Connection compressor is connected in parallel with high temperature compressor, is then sequentially connected in series condenser, Condensation-Evaporator, high-pressure throttle, gas
Liquid/gas separator entrance, gas-liquid separator export the piping connection high temperature compressor by being provided with by-passing valve, and gas-liquid separator goes out
Mouth is serially connected in cryogenic vaporizer, medium temperature by piping connection compressors in parallel, the low pressure throttle valve and pressed throttle valve respectively
Before evaporator；The refrigerant outlet of condenser passes through the refrigerant inlet of the piping connection Condensation-Evaporator of setting valve, cold
The refrigerant outlet of solidifying-evaporator passes through piping connection absorber, the absorption supercooling refrigeration system of Driven by Solar Energy and CO2Across facing
Boundary's double-stage compressive refrigerating system is coupled by the evaporator-condenser.
The CO2The design method of Trans-critical cycle double-stage compressive refrigerating system are as follows: the cryogenic compressor sucks the low temperature
The refrigerant vapour of evaporator outlet, isentropic Compression to intermediate pressure enter back into the medium temperature compressor isentropic Compression to high temperature
High pressure superheater state；The condensation of gas cooler equipressure is subsequently entered, it is absorption using the Driven by Solar Energy to increase refrigerating capacity
Refrigeration system is subcooled the refrigerant of the condensator outlet is subcooled；Enter back into the high-pressure throttle adiabatic throttling, cooling drop
Pressure；It subsequently enters the intercooler and carries out gas-liquid separation, isolated refrigerant vapour a part enters described parallelly compressed
Machine carries out isentropic Compression at elevated pressures, and another part refrigerant vapour enters the by-passing valve adiabatic throttling to intermediate pressure
The medium temperature compressor is mixed into the refrigerant superheat steam come out from the cryogenic compressor；From gas-liquid separator separates
Refrigerant saturated liquid a part out is by medium pressure throttle valve adiabatic throttling to intermediate pressure；Enter back into the medium temperature
The isobaric evaporation of evaporator heat absorption, the refrigerant vapour after evaporation are also mixed with the refrigerant superheat steam of cryogenic compressor outlet
It closes and enters the medium temperature compressor；Another part refrigerant saturated liquid isolated passes through the low pressure throttle valve adiabatic throttling
To low temperature, is evaporated into the cryogenic vaporizer equipressure, be again introduced into the cryogenic compressor and recycled.It is described
The design method of recirculation heater are as follows: temperature increases after the heat collector absorbs solar radiation, the storage water in the storage
Temperature also increase.The storage water specific gravity reduces, and enters the water storage upper box part through water pipe above.The water storage box
The cold water of bottom memory has larger specific gravity, is flowed under the heat collector by the water pipe of the water storage lower box part through the water pump
Side.After the cold water flowed into absorbs heat in the heat collector, the specific gravity mitigation of water is risen in the heat storage tank, is circuited sequentially
Go down.Hot water in the heat storage tank is used to heat the liquor ammoniae fortis in generator described in the absorption system.
The design method of the absorption system are as follows: the absorption system includes the circulation of refrigerant and molten
Liquid recycles two processes.The refrigerant circulating process is (by taking ammonia as an example): ammonia spirit is in the generator by described
In storage heater after hot water heating, the ammonia in solution is constantly vaporized, and the ammonia spirit concentration in the generator constantly reduces, and is entered
The absorber；Ammonia steam enters the condenser, is condensed into high pressure low temperature after the cooling water temperature in the condenser
Liquid ammonia；Liquid ammonia in the condenser is throttled by the throttle valve；It enters back into described in the evaporator-condenser absorption
CO2The refrigerant heat of condensator outlet described in Trans-critical cycle Two-stage Compression system, to be reached for the CO2Trans-critical cycle twin-stage
The purpose of compression refrigerating system supercooling；In the process, low temperature ammonia steam enters the absorber and is absorbed by ammonium hydroxide weak solution, molten
Liquid concentration is stepped up, then the generator as described in the solution pumped back, completes the circulation of entire absorption system.Together
When, since temperature is lower in the absorber for ammonium hydroxide concentrated solution, so increasing a solution heat exchanger makes the hair
The low temperature concentrated solution of high temperature weak solution and absorber outflow that raw device flows out carries out heat exchange, improves described in concentrated solution entrance
The temperature of generator.
Compared with prior art, the beneficial effects of the present invention are:
1) Driven by Solar Energy of the present invention absorbs supercooling CO2Trans-critical cycle double-stage compressive refrigerating system is by base apparatus performance
It influences big.Sunny when summer, outdoor environment temperature is higher, CO2Trans-critical cycle Two-stage Compression subsystem performance is deteriorated, and the sun
The absorption performance for crossing refrigeration subsystem can be driven to improve, more can effectively realize CO2The supercooling of Trans-critical cycle Two-stage Compression system, mentions
High CO2Trans-critical cycle Two-stage Compression cooling system amount and performance, the two complement each other.
2) Driven by Solar Energy of the present invention absorbs supercooling CO2Trans-critical cycle double-stage compressive refrigerating system is applied to the super refrigeration of quotient
In system, efficiently uses solar energy and realize the CO2The supercooling of Trans-critical cycle Two-stage Compression system, energy-saving and environmental protection and economy
Remarkable benefit meets the Sustainable Development Strategy of economy and society.
3) present invention uses CO2Trans-critical cycle Two-stage Compression system solves single stage compress system and causes to press because pressure ratio is excessive
The temperature of contracting end of a period superheated vapor is high, equal so as to cause gas transmission coefficient, specific refrigerating effect, refrigerating effect per unit swept volume, coefficient of refrigerating performance
A series of problems, such as decline and compressor power consumption increase, lubricating oil carbonizes.
Detailed description of the invention
Fig. 1 show the principle of the present invention figure.
Specific embodiment
The present invention is described in further detail below in conjunction with the drawings and specific embodiments.
The CO of the absorption supercooling of Driven by Solar Energy of the present invention2Trans-critical cycle double-stage compressive refrigerating system schematic diagram as shown in Figure 1,
The refrigeration system includes Driven by Solar Energy absorption system and CO2Trans-critical cycle double-stage compressive refrigerating system.The sun
It includes recirculation heater and absorption system that absorption system, which can be driven,.The recirculation heater includes heat collector
20, water pump 1, heat storage tank 18, water pump 2 19.Pass through insulation water pipe above 20 top of heat collector and the heat storage tank 18
It connects, the hot water in the heat storage tank 18 is connect by pipeline with the generator 21, the water that the water pump 1 will be cooled
It is pumped into 18 lower section of heat storage tank, cold water is pumped under the heat collector 20 by the water pump 2 19 below the heat storage tank 18
Side, circuits sequentially down.
The absorption system includes evaporator-condenser 6, absorber 13, solution pump 14, throttle valve 15, solution heat
Exchanger 16, generator 21, condenser 22.The outlet of absorber 13, solution pump 14, solution heat exchanger 16, generator 21,
Successively head and the tail are connected condenser 22 by pipeline, and the refrigerant liquid outlet of generator 21 passes through setting 16 He of solution heat exchanger
13 entrance of piping connection absorber of throttle valve 15.
The CO2Trans-critical cycle double-stage compressive refrigerating system includes cryogenic vaporizer 1, medium temperature evaporator 11, cryogenic compressor
2, high temperature compressor 3, compressors in parallel 4, gas cooler 5, Condensation-Evaporator 6, high-pressure throttle 7, gas-liquid separator 8, in
Press throttle valve 9, low pressure throttle valve 10, by-passing valve 12.The cryogenic vaporizer 1 be connected in series with cryogenic compressor 2 after with medium temperature
Evaporator 11 is connected in parallel, and compressors in parallel 4 is connected in parallel with high temperature compressor 3, is then sequentially connected in series condenser 5, cold
Solidifying-evaporator 6, high-pressure throttle 7,8 entrance of gas-liquid separator, gas-liquid separator 8 export the pipe by being provided with by-passing valve 12
Road connects high temperature compressor 3, and the outlet of gas-liquid separator 8 passes through piping connection compressors in parallel 4, the low pressure throttle valve 10 and institute
Pressure throttle valve 9 is stated to be serially connected in respectively before the cryogenic vaporizer 1, the medium temperature evaporator 11；The refrigerant of condenser 22
Outlet passes through the refrigerant inlet of the piping connection Condensation-Evaporator 6 of setting valve 23, and the refrigerant outlet of Condensation-Evaporator 6 is logical
Cross piping connection absorber 13, the absorption supercooling refrigeration system of Driven by Solar Energy and CO2Trans-critical cycle double-stage compressive refrigerating system is logical
The evaporator-condenser 6 is crossed to be coupled.
The CO2The design method of Trans-critical cycle double-stage compressive refrigerating system are as follows: the cryogenic compressor 2 sucks the low temperature
The refrigerant vapour that evaporator 1 exports, isentropic Compression to intermediate pressure；3 isentropic Compression of medium temperature compressor is entered back into height
Warm high pressure superheater state；The isobaric condensation of gas cooler 5 is subsequently entered, to increase refrigerating capacity, using the evaporator-condenser 6
Refrigerant supercooling to the condenser 5 outlet；Enter back into 7 adiabatic throttling of high-pressure throttle, decrease temperature and pressure；It subsequently enters
The intercooler 8 carries out gas-liquid separation, and isolated refrigerant vapour a part enters the compressors in parallel 4 in higher pressure
Carry out isentropic Compression under power, another part refrigerant vapour enters 12 adiabatic throttling of by-passing valve to intermediate pressure, and from institute
It states the refrigerant superheat steam that cryogenic compressor 2 comes out and is mixed into the medium temperature compressor 3；Divide from the gas-liquid separator 8
The refrigerant saturated liquid a part separated out, to intermediate pressure, enters back into described by 9 adiabatic throttling of medium pressure throttle valve
Medium temperature evaporator 11 absorbs heat isobaric evaporation, the also refrigerant mistake with the cryogenic compressor 2 outlet of the refrigerant vapour after evaporation
Hot steam is mixed into the medium temperature compressor 3；Another part refrigerant saturated liquid isolated throttles by the low pressure
10 adiabatic throttling of valve is again introduced into the cryogenic compressor to low temperature into the isobaric evaporation of the cryogenic vaporizer 1
2 are recycled.
The design method of the recirculation heater are as follows: temperature increases after the heat collector 20 absorbs solar radiation, described
The temperature of 20 storage water also increases in storage.The storage water specific gravity reduces, and enters the water storage through water pipe above
18 top of case.The cold water of 18 bottom memory of water storage box has larger specific gravity, as described in the water pipe warp of 18 lower part of water storage box
Water pump 2 19 flows to the lower section of the heat collector 20.After the cold water flowed into absorbs heat in the heat collector 20, the specific gravity of water
Mitigation rises in the heat storage tank 18, circuits sequentially down.Hot water in the heat storage tank 18 is described absorption for heating
Liquor ammoniae fortis in generator 21 described in refrigeration system.
The design method of the absorption system are as follows: the absorption system includes the circulation of refrigerant and molten
Liquid recycles two processes.The refrigerant circulating process is (by taking ammonia absorption refrigeration systems as an example): ammonia spirit is in the hair
In raw device 21 by the hot water heating in the storage heater 18 after, the ammonia in solution constantly vaporizes, the ammonia in the generator 21
Concentration of aqueous solution constantly reduces, into the absorber 13；Ammonia steam enters the condenser 22, by the condenser 22
It is condensed after cooling water temperature, becomes the liquid ammonia of high pressure low temperature；Liquid ammonia in the condenser 22 passes through the throttle valve 23
Throttling enters back into the evaporator-condenser 6 and absorbs from the CO2The outlet of condenser 5 described in Trans-critical cycle Two-stage Compression system
Refrigerant heat, to be reached for the CO2The purpose of Trans-critical cycle double-stage compressive refrigerating system supercooling；In the process, low temperature
Ammonia steam enters the absorber 13 and is absorbed by ammonium hydroxide weak solution, and solution concentration is stepped up, then is sent back to by the solution pump 14
The generator 21, completes the circulation of entire absorption system.Simultaneously as ammonium hydroxide concentrated solution is in the absorber 13
Temperature is lower, so increase a solution heat exchanger 15, the high temperature weak solution for flowing out the generator 21 with it is described
The low temperature concentrated solution that absorber 13 flows out carries out heat exchange, improves the temperature that concentrated solution enters the generator 21.
The above is only a preferred embodiment of the present invention, it is noted that for the common skill of the art
For art personnel, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications
Also it should be regarded as protection scope of the present invention.
Claims (1)
1. a kind of CO of the absorption supercooling of Driven by Solar Energy2Trans-critical cycle double-stage compressive refrigerating system, which is characterized in that the refrigeration
System includes Driven by Solar Energy absorption system and CO2Trans-critical cycle double-stage compressive refrigerating system；
The Driven by Solar Energy absorption system includes recirculation heater and absorption system, the recirculation heater
Including heat collector, heat storage tank, the absorption system includes evaporator-condenser, absorber, solution pump, throttle valve, solution
Heat exchanger, generator, condenser；It is connect with above heat storage tank by being insulated water pipe above the heat collector, the heat storage tank
Interior hot water is connect by pipeline with generator, and cooled water is pumped into below the heat storage tank by water pump one, the heat storage tank
Cold water is pumped into below heat collector by lower section by water pump two, absorber outlet, solution pump, solution heat exchanger, generator, condensation
Device is successively connected by pipeline from beginning to end, the pipe that the refrigerant liquid outlet of generator passes through setting solution heat exchanger and throttle valve
Road connects absorber entrance；
The CO2Trans-critical cycle double-stage compressive refrigerating system includes cryogenic vaporizer, medium temperature evaporator, cryogenic compressor, high temperature compressed
Machine, compressors in parallel, gas cooler, Condensation-Evaporator, high-pressure throttle, gas-liquid separator, middle pressure throttle valve, low pressure section
Valve, by-passing valve are flowed, the cryogenic vaporizer is connected in parallel after being connected in series with cryogenic compressor with medium temperature evaporator, parallel connection compression
Machine is connected in parallel with high temperature compressor, is then sequentially connected in series condenser, Condensation-Evaporator, high-pressure throttle, gas-liquid separation
Device entrance, gas-liquid separator export the piping connection high temperature compressor by being provided with by-passing valve, and gas-liquid separator outlet passes through
Piping connection compressors in parallel, the low pressure throttle valve and pressed throttle valve are serially connected in cryogenic vaporizer, medium temperature evaporator respectively
Before；Refrigerant inlet of the refrigerant outlet of condenser by the piping connection Condensation-Evaporator of setting valve, condensation-evaporation
The refrigerant outlet of device passes through piping connection absorber, the absorption supercooling refrigeration system of Driven by Solar Energy and CO2Trans-critical cycle twin-stage
Compression refrigerating system is coupled by the evaporator-condenser.
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| CN201910142693.0A CN109724293A (en) | 2019-02-26 | 2019-02-26 | The CO of the absorption supercooling of Driven by Solar Energy2Trans-critical cycle double-stage compressive refrigerating system |
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| CN201910142693.0A CN109724293A (en) | 2019-02-26 | 2019-02-26 | The CO of the absorption supercooling of Driven by Solar Energy2Trans-critical cycle double-stage compressive refrigerating system |
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| CN110425769A (en) * | 2019-07-25 | 2019-11-08 | 上海澳钶节能设备有限公司 | CO can be reduced2Transcritical cooling system air cooler outlet temperature system and method |
| CN110513902A (en) * | 2019-09-05 | 2019-11-29 | 天津商业大学 | A kind of multistage evaporation condensation mechanical super cooling Trans-critical cycle CO2Moderate and high temperature heat system |
| CN111141047A (en) * | 2020-01-22 | 2020-05-12 | 天津商业大学 | Solar energy absorption type cascade carbon dioxide two-stage compression refrigeration system |
| CN111141057A (en) * | 2020-01-21 | 2020-05-12 | 天津商业大学 | Absorption type supercooling transcritical CO2System for controlling a power supply |
| CN111141064A (en) * | 2020-01-22 | 2020-05-12 | 天津商业大学 | Multi-energy-driven absorption type cascade carbon dioxide two-stage compression refrigeration system |
| CN116222020A (en) * | 2023-03-07 | 2023-06-06 | 山东大学 | Phase change cold accumulation system based on transcritical carbon dioxide absorption refrigeration cycle |
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| CN111141064B (en) * | 2020-01-22 | 2024-04-09 | 天津商业大学 | Multi-energy driven absorption type cascade carbon dioxide two-stage compression refrigeration system |
| CN116222020A (en) * | 2023-03-07 | 2023-06-06 | 山东大学 | Phase change cold accumulation system based on transcritical carbon dioxide absorption refrigeration cycle |
| CN116222020B (en) * | 2023-03-07 | 2024-01-26 | 山东大学 | Phase change cold accumulation system based on transcritical carbon dioxide absorption refrigeration cycle |
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Application publication date: 20190507 |