CN207350986U - The CO2 freezing and refrigerating systems of devaporizer supercooling based on hydraulic recovery - Google Patents
The CO2 freezing and refrigerating systems of devaporizer supercooling based on hydraulic recovery Download PDFInfo
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- CN207350986U CN207350986U CN201721345626.1U CN201721345626U CN207350986U CN 207350986 U CN207350986 U CN 207350986U CN 201721345626 U CN201721345626 U CN 201721345626U CN 207350986 U CN207350986 U CN 207350986U
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Abstract
The utility model discloses a kind of CO of the devaporizer supercooling based on hydraulic recovery2Freezing and refrigerating system.The devaporizer that the utility model includes hydraulic recovery aided in cooling system and middle cryogenic freezing refrigerating system；The devaporizer of hydraulic recovery aided in cooling system to include medium temperature level expanding machine, low-temperature level expanding machine, water distribution system, dehydrator, coil pipe, fan, motor, water pump and power-supply management system；Middle cryogenic freezing refrigerating system includes medium temperature level compressor, low-temperature level compressor, gas cooler, medium temperature evaporator, cryogenic vaporizer, reservoir, throttle valve and electric expansion valve.The utility model realizes two temperature grades of medium temperature level and low-temperature level, and using Two-stage Compression, low-temperature level exhaust is mixed with medium temperature level evaporator outlet fluid, efficient by medium temperature level compressor compresses, energy saving of system afterwards.
Description
Technical field
It the utility model is related to hydraulic recovery and aided in refrigeration technique using devaporizer, more particularly to it is a kind of based on remaining
The devaporizer for pushing back receipts aided in cooling system.
Background technology
Imitated with fluorochlorohydrocarbon (CFCs) and hydrogen fluorochlorohydrocarbon (HCFCs) class material damage ozone layer and with higher greenhouse
Should be by or by gradually disabled.Relevant enterprise, scientific research institutions and colleges and universities both domestic and external increase to CO one after another2Refrigeration air-conditioner system
The input of system research and development, CO2Refrigerated air-conditioning system is the important research direction of refrigerating and air conditioning industry development from now on.CO2Have many excellent
Point：1) it is environmental-friendly, ODP=0, GWP=1；2) safe and non-toxic non-combustible, chemical property is stablized；3) it is cheap easily to obtain；4) with moistening
The compatibility of lubricating oil；5) viscosity is low, thermal conductivity factor is high, has good hot physical property and flowing and heat-transfer character；6) unit is held
Product cooling/heating amount is higher, compared with common working medium, CO2Equipment volume more compact.But CO2Kind of refrigeration cycle height pressure difference compared with
Height, restriction loss is big, causes its efficiency (COP) relatively low relative to conventional refrigerant system.
In Japan, with the CO of " ecology is smart " (Eco-Cute) using names2Teat pump boiler is as a kind of energy-saving and environment-friendly production
Its annual turnover is held in more than 450,000 to product in recent years.Norway in Europe, CO2Refrigeration system is in Supermarket clod system
The trend increased is presented in the use of system, and has become the first choice of supermarket's operator.Although CO2Refrigeration and air-conditioning technical has been applied to more
A field, and in Europe, Japanese and north America region extensive use, but CO2The relatively low key of Trans-critical cycle refrigeration cycle efficiency is asked
Topic is not solved at all yet.CO2Critical-temperature be 31.1 DEG C, critical pressure is up to 7.38MPa, and exothermic process usually occurs
On critical point, commonly referred to as CO2Kind of refrigeration cycle is trans critical cycle.Since its operating pressure is high, throttling irreversible loss is big,
Cause the circulation reverse Carnot cycle of substantial deviation, CO2Trans critical cycle efficiency is circulated less than conventional refrigerant.
Therefore, novel C O is developed2Trans-critical cycle kind of refrigeration cycle, reduces CO2Restriction loss, lifting circulation thermal performance, to improve
CO2Trans-critical cycle kind of refrigeration cycle efficiency provides a new road, to mitigating greenhouse effects, realizing that HCFCs is substituted with important
Economic value and social effect.
Utility model content
The utility model aim is that providing a kind of devaporizer based on hydraulic recovery aided in cooling system, passed through steaming
Cooler auxiliary system is sent out to CO2The CO of gas cooler outlet2Fluid is subcooled, and reduces CO2It is irreversible in throttling process
Loss, improves refrigeration system COP.
Technical solution adopted in the utility model is：A kind of CO of the devaporizer supercooling based on hydraulic recovery2It is cold
Freeze refrigerating system, including the devaporizer of hydraulic recovery aided in cooling system and middle cryogenic freezing refrigerating system；Hydraulic recovery
Devaporizer aided in cooling system include medium temperature level expanding machine, low-temperature level expanding machine, water distribution system, dehydrator, coil pipe,
Fan, motor, water pump and power-supply management system；Middle cryogenic freezing refrigerating system include medium temperature level compressor, low-temperature level compressor,
Gas cooler, medium temperature evaporator, cryogenic vaporizer, reservoir, throttle valve and electric expansion valve；Low-temperature level expanding machine and medium temperature
Level expanding machine connects motor and water pump respectively by connection power-supply management system, power-supply management system by power cord, electricity
Machine driving fan, fan lower section set gradually dehydrator, water distribution system and coil pipe, and water pump passes through water route and connects moisture disposition
System；Medium temperature stage compressor outlet connects gas cooler entrance, gas cooler outlet connection coil inlet, coil outlets connection
Medium temperature level expander inlet, medium temperature level expander outlet connection reservoir entrance, reservoir outlet connect electric expansion valve respectively
With low-temperature level expander inlet, electric expansion valve is saved by medium temperature evaporator medium temperature level suction port of compressor, reservoir by setting
The pipeline connection medium temperature level suction port of compressor of valve is flowed, low-temperature level expander outlet connects low-temperature level compressor by cryogenic vaporizer
Entrance, low temperature stage compressor outlet connection medium temperature level suction port of compressor.
The devaporizer of hydraulic recovery aided in cooling system by medium temperature level expanding machine, low-temperature level expanding machine, moisture disposition
System, dehydrator, coil pipe and power-supply management system composition.In, to be transferred to devaporizer auxiliary for the electric energy of low-temperature level expanding machine output
The power-supply management system of cooling system was helped, power-supply management system respectively powers fan and water pump, circulation is formed, so as to CO2
The CO of gas cooler outlet2Fluid carries out cooling and reaches supercooling effect.
Middle cryogenic freezing refrigerating system is expanded by low-temperature level compressor, medium temperature level compressor, low-temperature level expanding machine, medium temperature level
Machine, cryogenic vaporizer, medium temperature evaporator, gas cooler, throttle valve and reservoir composition.Filled in middle cryogenic freezing refrigerating system
The working medium of note is CO2, by the CO of low temperature stage compressor outlet2Superheated steam and the excessively hot CO of medium temperature evaporator outlet2Fluid mixes
It is cold into gas by medium temperature level compressor compresses to high temperature high-pressure supercritical fluid into medium temperature level compressor air suction mouth after conjunction
But device exchanges heat with surrounding air, is cooled to the supercritical fluid of a little higher than environment temperature of temperature, afterwards high pressure CO2Fluid passes through
Cross medium temperature level expanding machine to do work, the CO after expansion work2Gas-liquid two-phase fluid is separated into gaseous fluid and liquid phase into reservoir
Fluid, wherein gaseous fluid pass through throttle valve reducing pressure by regulating flow, flow into medium temperature level compressor, and a liquid phase fluid part flows through electronics
Expansion valve reaches medium temperature evaporator, and a part is done work by low-temperature level expander, becomes afterwards into cryogenic vaporizer, heat absorption
Enter medium temperature level compressor air suction mouth to cross after hot gas, complete circulation.
The utility model has the advantages and positive effects of：
(1) refrigerant of refrigeration system is natural refrigerant CO2。CO2GWP be 1, ODP 0, it is safe and non-toxic non-combustible, honest and clean
Valency easily obtains, and does not also decompose generation pernicious gas under the high temperature conditions, is environmental-friendly refrigerant, is made with HCFC and HFC etc.
Cryogen is compared, and alleviates greenhouse effects significantly, and environment-friendly advantage is obvious.
(2) due to CO2Pressure difference is big in throttling process, after replacing throttle valve using expanding machine, in recyclable throttling process
Expansion work, realizes hydraulic recovery.
(3) electricity that the acting of low-temperature level expanding machine is sent in is supplied to devaporizer auxiliary supercooling power supply managing system
System, cooling system was aided in CO by devaporizer2Fluid is subcooled, so as to improve system COP.
(4) by aiding in cooling system by CO2It is cooled to below environment temperature, can be significantly carried in warm, hot area
High CO2Refrigeration system COP.
(5) gentle low-temperature level carries out expansion decompression respectively in, realizes two temperature grades of medium temperature level and low-temperature level, uses
Two-stage Compression, low-temperature level exhaust are mixed with medium temperature level evaporator outlet fluid, pass through medium temperature level compressor compresses, system section afterwards
Can be efficiently.
(6) and traditional CO2Transcritical cooling system compares, and can reduce gas cooler optimum pressure.
Brief description of the drawings
Fig. 1 is the system schematic of the utility model.
Embodiment
For that can further appreciate that the invention, features and effects of the utility model, the following examples are hereby given, and coordinates
Attached drawing describes in detail as follows：
A kind of referring to Fig. 1, CO of the devaporizer auxiliary supercooling based on hydraulic recovery2Freezing and refrigerating system, overbottom pressure
The devaporizer of recycling aided in cooling system to include medium temperature level expanding machine 2, low-temperature level expanding machine 4, water distribution system 12, dehydration
Device 13, coil pipe 14, fan 15, motor 17, water pump 16 and power-supply management system 11；Middle cryogenic freezing refrigerating system includes medium temperature level
Compressor 10, low-temperature level compressor 6, gas cooler 1, medium temperature evaporator 9, cryogenic vaporizer 5, reservoir 3,7 and of throttle valve
Electric expansion valve 8；Low-temperature level expanding machine 4 and medium temperature level expanding machine 2 pass through connection power-supply management system 11, power management system
System 11 connects motor 17 and water pump 16, motor-driven fan by power cord respectively, and fan lower section sets gradually dehydrator 13, water
Distribution system 12 and coil pipe 14, water pump connect water distribution system 12 by water route；Medium temperature stage compressor outlet connects gas cooling
Device entrance, gas cooler outlet connection coil inlet, coil outlets connection medium temperature level expander inlet, medium temperature level expanding machine go out
Mouth connection reservoir entrance, reservoir outlet connect electric expansion valve and low-temperature level expander inlet respectively, and electric expansion valve leads to
Cross medium temperature evaporator medium temperature level suction port of compressor, reservoir by setting the pipeline of throttle valve to connect medium temperature level suction port of compressor,
Low-temperature level expander outlet connects low-temperature level suction port of compressor, low temperature stage compressor outlet connection medium temperature level by cryogenic vaporizer
Suction port of compressor.
The CO of devaporizer auxiliary supercooling of the present embodiment based on hydraulic recovery2The work of middle cryogenic freezing refrigerating system
Principle is：
The first step：The electricity sent that low-temperature level expanding machine 4 and medium temperature level expanding machine 2 export supplies devaporizer and aided in
The power-supply management system 11 of cooling system, power-supply management system 11 respectively power the motor 17 and water pump 16 for driving fan 15, water
Cooling water is delivered to water distribution system 12 by pump 16, and water uniformly drops to 14 surface of coil pipe, forms moisture film, is driven by wind turbine empty
Gas skips over moisture film, promotes CO in moisture evaporation absorption coil2The heat of fluid, so as to CO2The CO that gas cooler 1 exports2Stream
Body carries out cooling and reaches supercooling effect.Moisture film can partly become droplet with flowing up under the swabbing action of fan 15
Air leaves devaporizer into atmospheric environment, and which adds the consumption of water, dehydrator can stop most small
Drop is carried into air, and the droplet being blocked finally is flow back into inside devaporizer, is played saving cooling water and is disappeared
The effect of consumption.
Second step：The working medium of filling is CO in refrigeration system2, the CO of low-temp low-pressure2Steam is inhaled into medium temperature level compressor 10
Gas port, high temperature and pressure supercritical fluid is compressed to by medium temperature level compressor 10, is changed into gas cooler 1 with surrounding air
Heat, a little higher than environment temperature of refrigerant temperature at this time.
3rd step：Do work by medium temperature level expanding machine 2, be changed into gas-liquid two-phase fluid and enter reservoir 3, gas-liquid two-phase fluid
Gas phase two-phase is not categorized as by gravity, and gaseous fluid is on reservoir top, and liquid phase fluid is in reservoir lower part.Wherein gas phase
CO2Fluid is changed into the gas-liquid two-phase fluid of middle pressure after 7 expansion throttling of throttle valve；A liquid phase fluid part flows through electronic expansion
Valve 8 reaches medium temperature evaporator 9 after expanding, part driving low-temperature level expanding machine 4 is expanded to gas-liquid two-phase fluid entrance after doing work
Cryogenic vaporizer, was changed into hot gas after heat absorption, afterwards into low-temperature level compressor 6.
4th step：3 gas phase stream of 6 outlet superheat gas of low-temperature level compressor, 9 outlet superheat gas of medium temperature evaporator and fluid reservoir
Three tunnel of gas-liquid two-phase fluid after body segment stream, which is converged, flows back to medium temperature level compressor 10, completes kind of refrigeration cycle.
Although the preferred embodiment of the utility model is described above in conjunction with attached drawing, the utility model is not
Above-mentioned embodiment is confined to, above-mentioned embodiment is only schematical, is not restricted, ability
The those of ordinary skill in domain is not departing from the utility model aims and claimed under the enlightenment of the utility model
Under ambit, many forms can also be made, these are belonged within the scope of protection of the utility model.
Claims (1)
- A kind of 1. CO of the devaporizer supercooling based on hydraulic recovery2Freezing and refrigerating system, it is characterized in that, including hydraulic recovery Devaporizer aided in cooling system and middle cryogenic freezing refrigerating system；The devaporizer of hydraulic recovery aided in cooling system Including medium temperature level expanding machine, low-temperature level expanding machine, water distribution system, dehydrator, coil pipe, fan, motor, water pump and power management System；Middle cryogenic freezing refrigerating system includes medium temperature level compressor, low-temperature level compressor, gas cooler, medium temperature evaporator, low Warm evaporator, reservoir, throttle valve and electric expansion valve；Low-temperature level expanding machine and medium temperature level expanding machine pass through connection power supply Management system, power-supply management system connect motor and water pump, motor-driven fan respectively by power cord, and fan lower section is set successively Dehydrator, water distribution system and coil pipe are put, water pump connects water distribution system by water route；Medium temperature stage compressor outlet connects gas Cooler entrance, gas cooler outlet connection coil inlet, coil outlets connection medium temperature level expander inlet, the expansion of medium temperature level Machine outlet connection reservoir entrance, reservoir outlet connect electric expansion valve and low-temperature level expander inlet, electronic expansion respectively Valve is entered by medium temperature evaporator medium temperature level suction port of compressor, reservoir by setting the pipeline of throttle valve to connect medium temperature level compressor Mouthful, low-temperature level expander outlet connects low-temperature level suction port of compressor by cryogenic vaporizer, in the connection of low temperature stage compressor outlet Warm level suction port of compressor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721345626.1U CN207350986U (en) | 2017-10-19 | 2017-10-19 | The CO2 freezing and refrigerating systems of devaporizer supercooling based on hydraulic recovery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721345626.1U CN207350986U (en) | 2017-10-19 | 2017-10-19 | The CO2 freezing and refrigerating systems of devaporizer supercooling based on hydraulic recovery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207350986U true CN207350986U (en) | 2018-05-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721345626.1U Expired - Fee Related CN207350986U (en) | 2017-10-19 | 2017-10-19 | The CO2 freezing and refrigerating systems of devaporizer supercooling based on hydraulic recovery |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107621093A (en) * | 2017-10-19 | 2018-01-23 | 天津商业大学 | The CO of devaporizer supercooling based on hydraulic recovery2Freezing and refrigerating system |
| CN114608215A (en) * | 2022-05-14 | 2022-06-10 | 中国能源建设集团山西省电力勘测设计院有限公司 | High-energy-efficiency transcritical carbon dioxide two-stage compression cold-heat combined supply system |
| CN114608216A (en) * | 2022-05-14 | 2022-06-10 | 中国能源建设集团山西省电力勘测设计院有限公司 | Defrosting method of high-energy-efficiency transcritical carbon dioxide double-stage compression cold-hot combined supply system |
| EP4123242A1 (en) * | 2021-07-22 | 2023-01-25 | SPX Cooling Technologies, Inc. | Evaporatively cooled refigeration system and method |
-
2017
- 2017-10-19 CN CN201721345626.1U patent/CN207350986U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107621093A (en) * | 2017-10-19 | 2018-01-23 | 天津商业大学 | The CO of devaporizer supercooling based on hydraulic recovery2Freezing and refrigerating system |
| EP4123242A1 (en) * | 2021-07-22 | 2023-01-25 | SPX Cooling Technologies, Inc. | Evaporatively cooled refigeration system and method |
| CN114608215A (en) * | 2022-05-14 | 2022-06-10 | 中国能源建设集团山西省电力勘测设计院有限公司 | High-energy-efficiency transcritical carbon dioxide two-stage compression cold-heat combined supply system |
| CN114608216A (en) * | 2022-05-14 | 2022-06-10 | 中国能源建设集团山西省电力勘测设计院有限公司 | Defrosting method of high-energy-efficiency transcritical carbon dioxide double-stage compression cold-hot combined supply system |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180511 Termination date: 20181019 |