CN109724284A - A two-stage throttling supercritical carbon dioxide refrigeration system - Google Patents
A two-stage throttling supercritical carbon dioxide refrigeration system Download PDFInfo
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- CN109724284A CN109724284A CN201910139918.7A CN201910139918A CN109724284A CN 109724284 A CN109724284 A CN 109724284A CN 201910139918 A CN201910139918 A CN 201910139918A CN 109724284 A CN109724284 A CN 109724284A
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- intercooler
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- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims abstract description 35
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims abstract description 24
- 238000005057 refrigeration Methods 0.000 title claims abstract description 22
- 239000001569 carbon dioxide Substances 0.000 title claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 38
- 239000007788 liquid Substances 0.000 claims abstract description 4
- 239000003507 refrigerant Substances 0.000 description 22
- 238000004378 air conditioning Methods 0.000 description 18
- 238000001816 cooling Methods 0.000 description 15
- 238000010438 heat treatment Methods 0.000 description 14
- 239000006200 vaporizer Substances 0.000 description 5
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 231100000252 nontoxic Toxicity 0.000 description 2
- 230000003000 nontoxic effect Effects 0.000 description 2
- 239000011555 saturated liquid Substances 0.000 description 2
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000007701 flash-distillation Methods 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000116 mitigating effect Effects 0.000 description 1
- 231100000956 nontoxicity Toxicity 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000001932 seasonal effect Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
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- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
本发明公开了一种两级节流的超临界二氧化碳制冷系统。本发明所述低压压缩机排气口、中温蒸发器出口分别与中压压缩机进气口连接，中压压缩机出气口、并行压缩机出气口分别连接热水加热器，热水加热器、空气换热器、冷凝器、节流阀、空调、中间冷却器依次连接，所述中间冷却器中的出液口分别连接中压节流阀和低压节流阀，低压节流阀依次连接低温蒸发器、低压压缩机进气口，中压节流阀连接中温蒸发器换热；所述中间冷却器中的出气口分别连接并行压缩机进气口和闪蒸汽旁通阀，闪蒸汽旁通阀连接中温压缩机进气口。本发明的制冷系统采用CO2跨临界循环，CO2跨临界系统具有较低的年度能源使用费，节约了超市运营成本。
The invention discloses a two-stage throttling supercritical carbon dioxide refrigeration system. The low-pressure compressor exhaust port and the medium-temperature evaporator outlet of the present invention are respectively connected with the medium-pressure compressor air inlet, the medium-pressure compressor air outlet and the parallel compressor air outlet are respectively connected with the hot water heater, the hot water heater, The air heat exchanger, the condenser, the throttle valve, the air conditioner and the intercooler are connected in sequence, the liquid outlet in the intercooler is respectively connected with the medium pressure throttle valve and the low pressure throttle valve, and the low pressure throttle valve is connected with the low temperature throttle valve in turn. The air inlet of the evaporator and the low pressure compressor, and the medium pressure throttle valve are connected to the medium temperature evaporator for heat exchange; the air outlet in the intercooler is respectively connected to the air inlet of the parallel compressor and the flash steam bypass valve, and the flash steam is bypassed The valve is connected to the air inlet of the medium temperature compressor. The refrigeration system of the present invention adopts CO 2 transcritical cycle, and the CO 2 transcritical system has lower annual energy usage fee and saves the operation cost of the supermarket.
Description
Technical field
The present invention relates to refrigeration technology fields, more particularly to a kind of two-stage throttling supercritical carbon dioxide refrigeration system
The super energy comprehensive utilization system of quotient.
Background technique
Quotient is super, and refrigeration refers to the refrigeration applications such as cold chain, freezer, supermarket, display cabinet and air-cooler.CO2Trans-critical cycle pressurization system
System has become the standard supermarket refrigeration solution of some European countries' new equipments.Since environmental problem is serious, in Montreal
Regulation CFC and HCFC class refrigerant will gradually be eliminated in protocol, and for CO2The research of equal natural refrigerants is again by people
Concern, outside removing carbon dioxide, remaining working medium does not have the nontoxicity or incombustibility of carbon dioxide, carbon dioxide heat-pump
As in recent years emerging technology, use carbon dioxide as working medium, with environmental performance is excellent, chemical stability is good, economy
The advantages that good, safe and non-toxic non-combustible, thermal performance is good.Heat pump uses carbon dioxide as working medium, can be in recuperation of heat
By the temperature one-time heating of hot water to 90 DEG C or so, circulating-heating or addition assisted heating device are not needed, it is energy-efficient, when
When heat source temperature is lower, carbon dioxide heat-pump still heating capacity with higher and efficiency can be widely applied to industrial circle.
When to consider thermic load and refrigeration duty, CO simultaneously2Trans-critical cycle system has lower annual energy usage charges, in phase
To under cold weather conditions, CO 2 cross-critical air conditioning and water heating system is to meet that supermarket freezes simultaneously and heat demand has
The solution of effect.
Summary of the invention
The purpose of the present invention is low for energy utilization rate in the prior art, and provide a kind of overcritical based on two-stage throttling
The super energy comprehensive utilization system of the quotient of carbon dioxide refrigerating system.
The technical solution adopted to achieve the purpose of the present invention is:
A kind of super energy comprehensive utilization system of quotient based on two-stage throttling supercritical carbon dioxide refrigeration system, including low pressure
Compressor, intermediate pressure compressor and compressors in parallel；
The low pressure compressor exhaust outlet, medium temperature evaporator outlet are connect with intermediate pressure compressor air inlet respectively, middle pressure pressure
Contracting machine gas outlet, compressors in parallel gas outlet are separately connected hot-water heater, hot-water heater, air heat exchanger, condenser, section
Stream valve, air-conditioning, intercooler are sequentially connected, and the liquid outlet in the intercooler is separately connected middle pressure throttle valve and low pressure
Throttle valve, low pressure throttle valve are sequentially connected cryogenic vaporizer, low pressure compressor air inlet, and middle pressure throttle valve connects medium temperature evaporator
Heat exchange；Gas outlet in the intercooler is separately connected compressors in parallel air inlet and flash steam by-passing valve, by flash steam
Port valve connects medium temperature compressor inlet.
Without under specific demand, the system is conventional carbon dioxide two-stage compression refrigeration circulation, and refrigerant is from the low pressure
Exhaust outlet of compressor discharge, mix with the gaseous working medium of the medium temperature evaporator outlet, into high pressure compressor progress the
Second-compressed, subsequent refrigerant passes sequentially through the condenser, the throttle valve enters the intercooler, and the centre is cold
But the saturated liquid in device is divided into two-way, enters the cryogenic vaporizer after low pressure throttle valve throttling all the way and exchanges heat, quilt
The low pressure compressor compression；Another way throttles through medium pressure throttle valve, into the medium temperature evaporator heat exchange with it is described low
The gas mixing for pressing exhaust outlet of compressor discharge, gas in the intercooler after compressors in parallel compression with institute
The refrigerant mixing for stating the discharge of medium temperature exhaust outlet of compressor, completes a circulation.
When having cooling supply, supplying hot water demand simultaneously, the hot-water heater before the condenser is opened, and refrigerant is described
A part of heat is released in hot-water heater, realizes supplying hot water demand.
When having cooling supply, space heating demands simultaneously, the air heat exchanger before opening the condenser, refrigerant is in institute
It states and releases heat realization space heating demands in air heat exchanger.
When having cooling supply, air-conditioning cooling needs simultaneously, the air-conditioning before opening the intercooler, refrigerant is described
Heat is absorbed in air-conditioning realizes air-conditioning cooling needs.
When having cooling supply, supplying hot water, space heating demands simultaneously, the hot-water heater and institute before opening the condenser
Air heat exchanger is stated, high pressure compressor described in refrigerant passes sequentially through the hot-water heater out and the air heat exchanger is put
Heat realizes supplying hot water, space heating demands simultaneously.
When having cooling supply, supplying hot water, air conditioner refrigerating demand simultaneously, the hot-water heater and institute before opening the condenser
The air-conditioning before stating intercooler, high pressure compressor described in refrigerant, which comes out, passes sequentially through the hot-water heater, described
Condenser, the throttle valve and the air-conditioning, release a part of heat in the hot-water heater, absorb in the air-conditioning
A part of heat, while realizing supplying hot water, air conditioner refrigerating demand.
Compared with prior art, the beneficial effects of the present invention are:
1, refrigeration system of the invention uses CO2Trans critical cycle, CO2There is Trans-critical cycle system lower annual energy to make
Expense has saved supermarket's operation cost.
2, refrigeration system of the invention uses CO2As natural refrigerant, have be easy to produce, environmental performance is excellent, changes
Learn performance stabilization, good economy performance, it is safe and non-toxic, non-combustible, thermal performance is good the advantages that, CO2Use to push refrigerant
Substitution, mitigating greenhouse effects and depletion of the ozone layer has prominent meaning.
3, refrigeration system of the invention provides two different evaporating temperatures, respectively low temperature and medium temperature, meets supermarket not
Same storage requirements, and hot water supply, space are integrated with for warm air-conditioning cold supply system, keep supermarket system structure more compact.
Integrated solution needs less component and less refrigerant, this helps to save space resources, facilitates the maintenance of system
Maintenance.
4, refrigeration system of the invention can recycle condensation heat, reach energy-efficient purpose while refrigeration.
5, in refrigeration system of the invention, compressors in parallel is severe in outdoor environment, opens when system loading is larger, enhancing
The safety of system, improves overall system performance.
Detailed description of the invention
Fig. 1 show the principle of the present invention figure.
Specific embodiment
Below in conjunction with drawings and concrete examples, invention is further described in detail.
The present invention is based on the super energy comprehensive utilization system schematic diagrams of quotient of two-stage throttling supercritical carbon dioxide refrigeration system
As shown in Figure 1, using environment-friendly type natural refrigerant CO2, cold by low pressure compressor 1, intermediate pressure compressor 2, compressors in parallel 3, centre
But device 9, flash distillation by-passing valve 14, middle pressure throttle valve 10, low pressure throttle valve 12, medium temperature evaporator 11, cryogenic vaporizer 13, condenser
6, the two-stage throttling supercritical carbon dioxide refrigeration system that air heat exchanger 5, hot-water heater 4, throttle valve 7, air-conditioning 8 form,
The low pressure compressor exhaust outlet, medium temperature evaporator outlet are connect with intermediate pressure compressor air inlet respectively, intermediate pressure compressor outlet
Mouth, compressors in parallel gas outlet are separately connected hot-water heater, hot-water heater, air heat exchanger, condenser, throttle valve, sky
Tune, intercooler are sequentially connected, and the liquid outlet in the intercooler is separately connected middle pressure throttle valve and low pressure throttle valve,
Low pressure throttle valve is sequentially connected cryogenic vaporizer, low pressure compressor air inlet, and middle pressure throttle valve connects medium temperature evaporator heat exchange；Institute
It states the gas outlet in intercooler and is separately connected compressors in parallel air inlet and flash steam by-passing valve, the connection of flash steam by-passing valve
Medium temperature compressor inlet.Can according to the cooling and warming demand under Various Seasonal adjust cold and heat supply mode, comprehensive energy utilization,
With lower annual energy usage charges.
Without under specific demand, the system is conventional carbon dioxide two-stage compression refrigeration circulation, and refrigerant is compressed from low pressure
The discharge of 1 exhaust outlet of machine mix with the gaseous working medium of the medium temperature evaporator 11 outlet, into the high pressure compressor 2 progress the
Second-compressed, subsequent refrigerant pass sequentially through the condenser 6, the throttle valve 7 enter the intercooler 9, it is described in
Between saturated liquid in cooler 9 be divided into two-way, enter the cryogenic vaporizer after the low pressure throttle valve 12 throttling all the way
13 heat exchange, are compressed by the low pressure compressor 1；Another way throttles through medium pressure throttle valve 10, into the medium temperature evaporator
With the gas mixing of low pressure compressor A exhaust outlet discharge after 11 heat exchange, gas in the intercooler 9 through it is described simultaneously
Row compressor 3 mixes after compressing with the refrigerant of 2 exhaust outlet of medium temperature compressor discharge, completes a circulation.
When having cooling supply, supplying hot water demand simultaneously, the hot-water heater 4 before the condenser 6 is opened, and refrigerant is in institute
It states and releases a part of heat in hot-water heater 4, realize supplying hot water demand.
When having cooling supply, space heating demands simultaneously, the air heat exchanger 5 before opening the condenser F, refrigerant exists
Heat is released in the air heat exchanger 5 realizes space heating demands.
When having cooling supply, air-conditioning cooling needs simultaneously, the air-conditioning 8 before opening the intercooler 9, refrigerant is in institute
It states and absorbs heat realization air-conditioning cooling needs in air-conditioning 8.
When having cooling supply, supplying hot water, space heating demands simultaneously, 4 He of the hot-water heater before opening the condenser 6
The air heat exchanger 5, refrigerant are come out by high pressure compressor 2 and pass sequentially through the hot-water heater 4 and the air heat-exchange
5 heat release of device realizes supplying hot water, space heating demands simultaneously.
When having cooling supply, supplying hot water, air conditioner refrigerating demand simultaneously, 4 He of the hot-water heater before opening the condenser 6
The air-conditioning 8 before the intercooler 9, refrigerant come out from the high pressure compressor B and pass sequentially through the hot water heating
Device 4, the condenser 6, the throttle valve 7 and the air-conditioning 8 release a part of heat in the hot-water heater 4, in institute
It states and absorbs a part of heat in air-conditioning 8, while realizing supplying hot water, air conditioner refrigerating demand.
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)
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910139918.7A CN109724284A (en) | 2019-02-26 | 2019-02-26 | A two-stage throttling supercritical carbon dioxide refrigeration system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910139918.7A CN109724284A (en) | 2019-02-26 | 2019-02-26 | A two-stage throttling supercritical carbon dioxide refrigeration system |
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| Publication Number | Publication Date |
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| CN109724284A true CN109724284A (en) | 2019-05-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910139918.7A Pending CN109724284A (en) | 2019-02-26 | 2019-02-26 | A two-stage throttling supercritical carbon dioxide refrigeration system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110057124A (en) * | 2019-05-21 | 2019-07-26 | 天津商业大学 | A kind of part superposition type quotient is super to use CO2Trans-critical cycle double-stage compressive refrigerating system |
| CN111141046A (en) * | 2020-01-22 | 2020-05-12 | 天津商业大学 | A coupled refrigeration system |
| CN119554792A (en) * | 2023-09-01 | 2025-03-04 | 中国科学院理化技术研究所 | Transcritical CO2 Heat Pump System |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106969557A (en) * | 2017-03-20 | 2017-07-21 | 山东大学 | A kind of dual temperature CO with economizer2Trans-critical cycle is pressurized refrigeration system |
| CN206426804U (en) * | 2017-01-24 | 2017-08-22 | 天津商业大学 | A kind of CO 2 cross-critical kind of refrigeration cycle automotive air-conditioning system |
| CN209672629U (en) * | 2019-02-26 | 2019-11-22 | 天津商业大学 | A kind of supercritical carbon dioxide refrigeration system of two-stage throttling |
-
2019
- 2019-02-26 CN CN201910139918.7A patent/CN109724284A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206426804U (en) * | 2017-01-24 | 2017-08-22 | 天津商业大学 | A kind of CO 2 cross-critical kind of refrigeration cycle automotive air-conditioning system |
| CN106969557A (en) * | 2017-03-20 | 2017-07-21 | 山东大学 | A kind of dual temperature CO with economizer2Trans-critical cycle is pressurized refrigeration system |
| CN209672629U (en) * | 2019-02-26 | 2019-11-22 | 天津商业大学 | A kind of supercritical carbon dioxide refrigeration system of two-stage throttling |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110057124A (en) * | 2019-05-21 | 2019-07-26 | 天津商业大学 | A kind of part superposition type quotient is super to use CO2Trans-critical cycle double-stage compressive refrigerating system |
| CN111141046A (en) * | 2020-01-22 | 2020-05-12 | 天津商业大学 | A coupled refrigeration system |
| CN119554792A (en) * | 2023-09-01 | 2025-03-04 | 中国科学院理化技术研究所 | Transcritical CO2 Heat Pump System |
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Application publication date: 20190507 |