CN108180667A - CO is subcooled in a kind of mechanical-assisted2Trans-critical cycle cooling and warming integral system - Google Patents
CO is subcooled in a kind of mechanical-assisted2Trans-critical cycle cooling and warming integral system Download PDFInfo
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- CN108180667A CN108180667A CN201810093169.4A CN201810093169A CN108180667A CN 108180667 A CN108180667 A CN 108180667A CN 201810093169 A CN201810093169 A CN 201810093169A CN 108180667 A CN108180667 A CN 108180667A
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- Prior art keywords
- evaporator
- cooling
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- refrigerant
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B1/00—Compression machines, plants or systems with non-reversible cycle
- F25B1/10—Compression machines, plants or systems with non-reversible cycle with multi-stage compression
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B29/00—Combined heating and refrigeration systems, e.g. operating alternately or simultaneously
- F25B29/003—Combined heating and refrigeration systems, e.g. operating alternately or simultaneously of the compression type system
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/07—Details of compressors or related parts
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
The invention discloses a kind of mechanical-assisteds to be subcooled CO2The refrigerant of the cooling evaporator outflow of Trans-critical cycle cooling and warming integral system mechanical-assisteds of the present invention supercooling heat pump system is through auxiliary circulation compressor by refrigerant compression into high temperature and high pressure gas, it exchanges heat into condenser and return water, refrigerant after heat exchange enters cooling evaporator after auxiliary circulation throttle valve expansion throttling, to CO2The CO of gas cooler outlet2Fluid is cooled down；CO2The CO of Trans-critical cycle cooling and warming integral system2Exchange heat through evaporator outflow into gas cooler with return water after compressor, after the heat of evaporator absorption coolant is flowed into after throttle valve expansion throttling, coolant flows into evaporator again from evaporator outflow through coil pipe.The present invention makes full use of system to inhale the cold and heat of exothermic process under the premise of system high efficiency operation is ensured.
Description
Technical field
The present invention relates to the CO of mechanical-assisted supercooling2Cooling and warming integral system.
Background technology
Zhangjiakou is taken by the hand with Beijing and successfully bids to host Winter Olympic Games in 2022, and China's winter sports welcomes unprecedented development
Opportunity.In order to realize " 300,000,000 people participate in winter sports " target, winter sports can be gradually universal to masses.It is transported with ice and snow is participated in
Dynamic people is more and more, and winter sports venues and facilities also can rapidly increase.Large-scale gymnasium can be equipped with simultaneously artificial ice rink,
Swimming pool and and the summer in winter have the demand for warm cooling.Ensure the normal operation of large-scale stadium, need to pass through system
Cool equipment provides cold, and provide heat for swimming pool and heating equipment for ice rink.In order to meet refrigeration and system simultaneously
The heat that ice rink ice making equipment condenser side discharges can be recycled, be carried for swimming pool and heating equipment by the demand of heat
Heating load to improve refrigeration system comprehensive energy efficiency, achieves energy-saving and emission reduction purposes.
To ensure that water temperature temperature is 26~28 DEG C, water is warming to 50 DEG C or so and reinjects in swimming pool, adds for cycle
Heat.And the heating system of the stadiums for northern area, end generally use radiator, it is desirable that general radiator water inlet
60~85 DEG C of temperature, 50~75 DEG C of return water temperature, supply backwater temperature difference is smaller, is also circulating-heating.And heating system be all according to
By fire coal, the pollutant generated that burns is more, a big inducement big to the harm of environment and leading to north of china in winter haze.
For administer north of china in winter haze problem, government it is also proposed that using coal change the measures such as electricity solve north of china in winter heating, i.e., by electricity consumption,
The clean energy resourcies such as combustion gas replace traditional coal heating, need to be transformed the heating system of stadiums.Such as use heat pump
After systematic substitution coal-burning boiler, if heat supply end (radiator) is not transformed, supply and return water temperature should remain unchanged.
However the refrigerant that uses of current market sales of heat pump product for meeting this working condition be mainly HFC or
The artificial synthesized refrigerant of HCFC classes, these refrigerant GWP values are higher, have stronger greenhouse effects.In October, 2016, the whole world reached
Into《Montreal Protocol Kigali's amendment》It is proposed wants emphasis to cut down HFC class compounds.Therefore, natural refrigerant CO2By
Gradually cause the extensive concern of people.Using CO2System both can be used for freezing can also be used to heat.However, CO2Heat pump system
System is suitable for the big system of backwater temperature difference (such as heat pump water heater system), such as uses CO2Heat pump is for heating, energy
It imitates relatively low.And CO2Restriction loss is larger, and leading to it, efficiency is relatively low under cooling condition.
Such as use CO2System carries out cooling for ice rink, and the thermal discharge of gas cooler is recycled to swim
Swimming pool and heating, it is necessary to overcome problems with：1) reduce CO2Throttle irreversible loss, increases refrigerating capacity；2) confession is being reduced
Under the premise of backwater temperature difference, ensure CO2The higher efficiency of system；3) ensure system safety and environmental protection.
Invention content
Present invention aims at provide a kind of mechanical-assisted supercooling CO2Trans-critical cycle cooling and warming integral system, is ensureing
Under the premise of system safety and environmental protection, system energy efficiency is improved by mechanical super cooling, realizes efficient cooling and heat supply.
The technical solution used in the present invention is：CO is subcooled in a kind of mechanical-assisted2Trans-critical cycle cooling and warming integral system,
Heat pump system and CO is subcooled including mechanical-assisted2Cooling and warming integral system；
Mechanical-assisted supercooling heat pump system includes auxiliary circulation compressor, condenser, auxiliary circulation throttle valve and cooling and steams
Send out device；The refrigerant of cooling evaporator outflow through auxiliary circulation compressor by refrigerant compression into high temperature and high pressure gas, entrance is cold
Condenser exchanges heat with return water, and the refrigerant after heat exchange enters cooling evaporator after auxiliary circulation throttle valve expansion throttling,
To CO2The CO of gas cooler outlet2Fluid is cooled down；
CO2Trans-critical cycle cooling and warming integral system includes compressor, gas cooler, throttle valve and evaporator composition；
CO2Exchange heat through evaporator outflow into gas cooler with return water after compressor, after by throttle valve expansion throttling
The heat that evaporator absorbs coolant is flowed into afterwards, and coolant is flowed out from evaporator flows into evaporator again through coil pipe；
The return water of natatorium or radiator flows through triple valve, is divided into two-way, flows through mechanical-assisted all the way and crosses the cold of cooling system
Condenser, another way return water flow to CO2The gas cooler of cycle, final two-way hot water flow to blending tank, and mixed hot water is defeated
It send to natatorium or radiator.
The invention has the advantages and positive effects that：
(1)CO2The refrigerant of cooling and warming integral system is natural refrigerant CO2。CO2GWP for 1, ODP 0, safety
Nontoxic non-combustible, cheap easily acquisition, does not decompose generation pernicious gas yet, is environmental-friendly refrigerant under the high temperature conditions.It is auxiliary
The refrigerant for helping recycling is R152a or R1234yf, belongs to low GWP refrigerants, environment-friendly advantage is apparent.
(2) conventional steam is compressed into cycle and CO2Trans critical cycle is combined, and reduces CO2Cooling and warming integral system
Supply backwater temperature difference, and promote CO2The efficiency of system.
(3) for return water, it is divided into two-way, the condenser for flowing through auxiliary circulation all the way is heated, and another way flows through CO2It follows
The gas cooler of ring is heated, and the two-way hot water after heating enters blending tank and mixed, and supplying user heating later makes
With the inlet and outlet temperature difference of two-way return water is smaller, under the premise of radiator supplying thermal condition is ensured, ensures system energy efficiency.
(4) by mechanical super cooling system to CO2The CO of system gas cooler outlet2It is subcooled, is lowered into throttle valve
Preceding CO2Temperature reduces restriction loss, and further reduces CO2High pressure is run, ensures CO2Heat pump system Effec-tive Function.
(5) CO is made full use of2The cold and hot amount that cooling and warming integral system is produced, evaporator to coolant absorbing and cooling temperature,
Coolant is freezed.
Description of the drawings
Fig. 1 is the system schematic of the present invention.
Specific embodiment
In order to further understand the content, features and effects of the present invention, detailed description are as follows for attached drawing：Referring to Fig. 1,
CO is subcooled for a kind of mechanical-assisted2Trans-critical cycle cooling and warming integral system.For return water, it is divided into two-way, flows through auxiliary all the way
The condenser of cycle (R152a or R1234yf can be used in refrigerant) is heated, and another way flows through CO2The gas cooling of cycle
Device is heated, and the two-way hot water after heating enters blending tank and mixed, and supplies swimming pool later or heating uses, at this time
CO2The CO of system gas cooler outlet2Temperature higher (since return water temperature is higher) is by auxiliary system to CO2It is subcooled,
CO before throttle valve can be lowered into2Temperature can thus play reduction restriction loss, reduce CO2The effect of high pressure is run,
Under the smaller working condition of supply backwater temperature difference, CO2Heat pump system remains able to Effec-tive Function.In CO2In heat pump system, steaming is utilized
It sends out refrigerant in device to absorb heat, to coolant cooling refrigeration, specific embodiment is：
The first step：Auxiliary circulation compressor 5 sucks the refrigerant gas of the low-temp low-pressure in 4 exit of cooling evaporator, will
It is compressed into the gas of high temperature and pressure, and temperature reduces after being exchanged heat with hot water, flows through the throttling drop of auxiliary circulation throttle valve 3 later
Pressure, becomes gas-liquid two-phase state.Enter auxiliary circulation compressor 5 after 4 evaporation endothermic of cooling evaporator as overheated gas again,
Complete auxiliary circulation.
Second step：Compressor 8 absorbs the low-temp low-pressure CO in 7 exit of evaporator2Gas compresses it into high temperature and pressure
Supercritical fluid exchanges heat through gas cooler 9 and water in pipeline, then is subcooled through cooling evaporator 4, by throttle valve
Become the gas-liquid two-phase state of low-temp low-pressure after 6 throttlings, enter back into compressor 8 after the evaporation of evaporator 7, and so on follow
Ring.
Third walks：CO in evaporator 72Evaporation absorbs the heat of coolant, and coolant flows through coil pipe 11, realizes refrigeration.
4th step：Return water is exchanged heat by flowing through condenser 2 after triple valve 1 all the way, and gas coming through evaporator 9 exchanges heat all the way
Afterwards, it focuses in blending tank 10 and is mixed, mixed hot water flows into swimming pool or radiator 12.
Although the preferred embodiment of the present invention is described above in conjunction with attached drawing, the invention is not limited in upper
The specific embodiment stated, above-mentioned specific embodiment is only schematical, be not it is restricted, this field it is common
Technical staff is not departing from present inventive concept and scope of the claimed protection, may be used also under the enlightenment of the present invention
By make it is many in the form of, within these are all belonged to the scope of protection of the present invention.
Claims (2)
1. CO is subcooled in a kind of mechanical-assisted2Trans-critical cycle cooling and warming integral system, which is characterized in that mechanical-assisted crosses cold-heat pump
System includes auxiliary circulation compressor, condenser, auxiliary circulation throttle valve and cooling evaporator；The refrigeration of cooling evaporator outflow
Agent through auxiliary circulation compressor by refrigerant compression into high temperature and high pressure gas, exchange heat into condenser and return water, after heat exchange
Refrigerant after auxiliary circulation throttle valve expansion throttling enter cooling evaporator, to CO2The CO of gas cooler outlet2Stream
Body is cooled down；
CO2Trans-critical cycle cooling and warming integral system includes compressor, gas cooler, throttle valve and evaporator composition；CO2Through
Evaporator outflow exchanges heat after compressor into gas cooler with return water, after flowed into after throttle valve expansion throttling
Evaporator absorbs the heat of coolant, and coolant is flowed out from evaporator flows into evaporator again through coil pipe；
The return water of natatorium or radiator flows through triple valve, is divided into two-way, flows through the condenser that mechanical-assisted crosses cooling system all the way,
Another way return water flow to CO2The gas cooler of cycle.Final two-way hot water flow to blending tank, mixed delivery to trip
Swimming shop or radiator.
2. CO is subcooled in mechanical-assisted according to claim 12Trans-critical cycle cooling and warming integral system, which is characterized in that auxiliary
The refrigerant for helping circulating heat pump is that R152a or R1234yf, GWP are below 150.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810093169.4A CN108180667A (en) | 2018-01-31 | 2018-01-31 | CO is subcooled in a kind of mechanical-assisted2Trans-critical cycle cooling and warming integral system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810093169.4A CN108180667A (en) | 2018-01-31 | 2018-01-31 | CO is subcooled in a kind of mechanical-assisted2Trans-critical cycle cooling and warming integral system |
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| Publication Number | Publication Date |
|---|---|
| CN108180667A true CN108180667A (en) | 2018-06-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810093169.4A Pending CN108180667A (en) | 2018-01-31 | 2018-01-31 | CO is subcooled in a kind of mechanical-assisted2Trans-critical cycle cooling and warming integral system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110579033A (en) * | 2019-08-20 | 2019-12-17 | 天津商业大学 | Transcritical CO based on double four-way reversing valve2Triple co-generation comfort system |
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| CN103105021A (en) * | 2013-01-22 | 2013-05-15 | 秦海涛 | Refrigeration heat pump unit of carbon dioxide (CO2) transcritical cycle and control method thereof |
| CN104949390A (en) * | 2015-06-25 | 2015-09-30 | 西安交通大学 | Transcritical CO2 heat pump system for heating radiator heating |
| CN105042672A (en) * | 2015-09-01 | 2015-11-11 | 中国铁道科学研究院 | Air source CO2 heat pump system suitable for connecting heating radiators |
| CN204923159U (en) * | 2015-09-01 | 2015-12-30 | 北京嘉孚科技有限公司 | Be applicable to heating carbon dioxide air source heat pump system of high return water temperature |
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| CN208012136U (en) * | 2018-01-31 | 2018-10-26 | 天津商业大学 | A kind of mechanical-assisted supercooling CO2 Trans-critical cycle cooling and warming integral systems |
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2018
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Patent Citations (6)
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| CN103105021A (en) * | 2013-01-22 | 2013-05-15 | 秦海涛 | Refrigeration heat pump unit of carbon dioxide (CO2) transcritical cycle and control method thereof |
| CN104949390A (en) * | 2015-06-25 | 2015-09-30 | 西安交通大学 | Transcritical CO2 heat pump system for heating radiator heating |
| CN105042672A (en) * | 2015-09-01 | 2015-11-11 | 中国铁道科学研究院 | Air source CO2 heat pump system suitable for connecting heating radiators |
| CN204923159U (en) * | 2015-09-01 | 2015-12-30 | 北京嘉孚科技有限公司 | Be applicable to heating carbon dioxide air source heat pump system of high return water temperature |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110579033A (en) * | 2019-08-20 | 2019-12-17 | 天津商业大学 | Transcritical CO based on double four-way reversing valve2Triple co-generation comfort system |
| CN110579033B (en) * | 2019-08-20 | 2024-05-31 | 天津商业大学 | Transcritical CO based on double four-way reversing valve2Triple co-generation comfort system |
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Application publication date: 20180619 |
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