CN105371516B - Carbon dioxide twin-stage cold-hot combined supply system - Google Patents
Carbon dioxide twin-stage cold-hot combined supply system Download PDFInfo
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- CN105371516B CN105371516B CN201510547794.8A CN201510547794A CN105371516B CN 105371516 B CN105371516 B CN 105371516B CN 201510547794 A CN201510547794 A CN 201510547794A CN 105371516 B CN105371516 B CN 105371516B
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Abstract
A kind of carbon dioxide twin-stage cold-hot combined supply system, the system includes carbon dioxide sub critical compressor, CO 2 cross-critical compressor, the first oil eliminator, the first condenser, the first expanding machine, the second oil eliminator, the second condenser, the second expanding machine, maintenance system, reservoir, the first gas-liquid separator and the second gas-liquid separator；Beneficial effects of the present invention：Refrigerating effect per unit swept volume is larger, superior thermodynamic property；Refrigerant R134a in expander system is current pandemic middle low-temperature environment-friendly refrigerant.The system being capable of whole recovering condensing heats, output high-temperature-hot-water.By the energy utilization of the loss of reducing pressure by regulating flow, the back pressure of carbon dioxide is improved, the efficiency of whole system is substantially increased.The condensation heat of expander system part is also obtained all of for improving the degree of superheat of carbon dioxide return-air in the system.
Description
Technical field
The invention belongs to refrigeration system technical field, more particularly to a kind of carbon dioxide twin-stage cold-hot combined supply system.
Background technology
Using twin-stage form, its purpose is typically all in order to obtain relatively low evaporating temperature, in circulation in conventional refrigeration
During there is substantial amounts of condensation heat not to be used effectively, while also had in throttling process part energy loss, drop
The low efficiency of whole system.
The content of the invention
It is an object of the invention to overcome above-mentioned deficiency, there is provided a kind of carbon dioxide twin-stage cold-hot combined supply system.
The technical scheme is that such：The system includes carbon dioxide sub critical compressor, CO 2 cross and faced
Boundary's compressor, the first oil eliminator, the first condenser, the first expanding machine, the second oil eliminator, the second condenser, the second expansion
Machine, maintenance system, reservoir, the first gas-liquid separator and the second gas-liquid separator；Wherein maintain system connection reservoir, dioxy
Change carbon subcritical compression machine outlet enter CO 2 cross-critical suction port of compressor, CO 2 cross in parallel with reservoir outlet to face
Boundary's compressor outlet is sequentially connected the first oil eliminator, the first condenser and the first expanding machine, the first expanding machine connection subcooler
Entrance, subcooler outlet connection reservoir entrance, the one outlet of reservoir connects the second expanding machine by regenerator, second swollen
Swollen machine connects regenerator by evaporator and the first gas-liquid separator, and regenerator connects carbon dioxide Asia by the second condenser and faced
Boundary's compressor.
The first described expanding machine passes sequentially through the second oil eliminator, the second condenser, subcooler and the second gas-liquid separation
Device connects the second expanding machine.
Described maintenance system is provided with heat exchange coil, and heat exchange coil is arranged on inside reservoir.
Described maintenance internal system is provided with the compressor that reservoir can be made to cool.
Beneficial effects of the present invention：
● all environmental protection refrigerants of refrigerant that the system is used, carbon dioxide is used as pure natural refrigerant, ozone layer
It is 0 to destroy latent energy value, and global warming potential is 1, and refrigerating effect per unit swept volume is larger, superior thermodynamic property；Expanding machine system
Refrigerant R134a in system is current pandemic middle low-temperature environment-friendly refrigerant.
● the system being capable of whole recovering condensing heats, output high-temperature-hot-water.
● the expanding machine added in the system, by the energy utilization of the loss of reducing pressure by regulating flow, improve returning for carbon dioxide
Atmospheric pressure, substantially increases the efficiency of whole system.
● the condensation heat of expander system part is also obtained all of for improving carbon dioxide return-air in the system
The degree of superheat.
Brief description of the drawings：
Fig. 1 is Integral combined structure figure of the present invention；
Embodiment
The present invention will be further described with implementation below in conjunction with the accompanying drawings.
As shown in figure 1, the system includes carbon dioxide sub critical compressor, CO 2 cross-critical compressor, the first oil
Separator, the first condenser, the first expanding machine, the second oil eliminator, the second condenser, the second expanding machine, maintenance system, liquid storage
Device, the first gas-liquid separator and the second gas-liquid separator；Wherein maintain system connection reservoir, carbon dioxide sub critical compressor
Outlet is in parallel with reservoir outlet to enter CO 2 cross-critical suction port of compressor, CO 2 cross-critical compressor outlet successively
Connect the first oil eliminator, the first condenser and the first expanding machine, the first expanding machine connection subcooler entrance, subcooler outlet company
Connect reservoir entrance, the one outlet of reservoir by regenerator connect the second expanding machine, the second expanding machine by evaporator and
First gas-liquid separator connects regenerator, and regenerator connects carbon dioxide sub critical compressor by the second condenser.
The first described expanding machine passes sequentially through the second oil eliminator, the second condenser, subcooler and the second gas-liquid separation
Device connects the second expanding machine.
Described maintenance system is provided with heat exchange coil, and heat exchange coil is arranged on inside reservoir.
Described maintenance internal system is provided with the compressor that reservoir can be made to cool.
The system main flow
The carbon dioxide two-bed system is using natural carbon dioxide coolant as cycle fluid, and carbon dioxide is by sub-
Pressed again into CO 2 cross-critical compressor after being mixed after the compression of critical compressive machine with the cryogenic gas from reservoir
Contracting, it will produce the carbon dioxide of higher exhaust gas temperature, these heats can be with the hot water of 85 DEG C of output highest, after being condensed
Carbon dioxide enter the first expanding machine, to the first expanding machine do work so that carbon dioxide decompression after enter liquid storage by supercooling
Device.Liquid in reservoir carries out secondary supercooling by regenerator, into the second expanding machine, and decompression enters evaporator and steamed after acting
Compressor air suction mouthful is returned to after hair heat absorption.
The inside of reservoir in system is provided with coil pipe, and outside maintenance system is reservoir internal cooling by coil pipe,
Reservoir internal temperature is set to be able to maintain that within the specific limits, while a part of gas of reservoir can also return to two-stage compressor
Center section, be the exhaust cooling of subcritical compression machine.
The R134a in expanding machine is promoted using high-pressure carbon dioxide in expander system, two expanding machines are connected, to refrigeration
Agent forms two stages of compression, and the working medium after being compressed is changed into cold plate after oil and transfers heat to low pressure return-air, make
Carbon dioxide return-air reaches superheat state.R134a refrigerants after cooling, into plate type heat exchanger evaporation endothermic, absorption condensation
The heat of carbon dioxide, reaches supercooled state afterwards.Eventually pass qi leel and return to expanding machine 2.
The principle of the system
The kind of refrigeration cycle of conventional refrigerants is all below critical point, because the critical point of carbon dioxide is higher by only 31
DEG C, critical pressure up to arrives 7.38MPa, so carbon dioxide coolant can carry out kind of refrigeration cycle in the case of Trans-critical cycle,
But during due to trans critical cycle, evaporating temperature can not be too low.So in order to make up this shortcoming, author is faced using carbon dioxide Asia
Boundary's compressor docks to form two stages of compression with Trans-critical cycle compressor so that the minimum evaporating temperature of the system can reach -50 DEG C,
Also can output maximum temperature be 85 DEG C of hot water.The use of expanding machine in system so that its is maximized to make use of throttling process
Energy, considerably increase the efficiency of whole system.
Claims (1)
1. a kind of carbon dioxide twin-stage cold-hot combined supply system, it is characterised in that:The system is compressed including carbon dioxide sub critical
Machine, CO 2 cross-critical compressor, the first oil eliminator, the first condenser, the first expanding machine, the second oil eliminator, second
Condenser, the second expanding machine, maintenance system, reservoir, the first gas-liquid separator and the second gas-liquid separator；Wherein maintain system
Reservoir is connected, carbon dioxide sub critical compressor outlet is in parallel with reservoir outlet to be entered into CO 2 cross-critical compressor
Mouthful, CO 2 cross-critical compressor outlet is sequentially connected the first oil eliminator, the first condenser and the first expanding machine, and first is swollen
Swollen machine connects subcooler entrance, subcooler outlet connection reservoir entrance, and the one outlet of reservoir passes through regenerator connection the
Two expanding machines, the second expanding machine connects regenerator by evaporator and the first gas-liquid separator, and regenerator passes through the second condenser
Connect carbon dioxide sub critical compressor；
The first described expanding machine passes sequentially through the second oil eliminator, the second condenser, subcooler and the second gas-liquid separator and connected
Connect the second expanding machine；
The R134a in expanding machine is promoted using high-pressure carbon dioxide, two expanding machines are connected, and two-stage pressure is formd to refrigerant
Contracting, the working medium after being compressed transfers heat to low pressure return-air into the second condenser, makes dioxy after the second oil eliminator
Change carbon return-air and reach superheat state；
Described maintenance system is provided with heat exchange coil, and heat exchange coil is arranged on inside reservoir；
Described maintenance internal system is provided with the compressor that reservoir can be made to cool.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510547794.8A CN105371516B (en) | 2015-08-31 | 2015-08-31 | Carbon dioxide twin-stage cold-hot combined supply system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510547794.8A CN105371516B (en) | 2015-08-31 | 2015-08-31 | Carbon dioxide twin-stage cold-hot combined supply system |
Publications (2)
| Publication Number | Publication Date |
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| CN105371516A CN105371516A (en) | 2016-03-02 |
| CN105371516B true CN105371516B (en) | 2017-10-10 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110849014A (en) * | 2019-10-17 | 2020-02-28 | 安徽正刚新能源科技有限公司 | Energy recovery system of MW-level transcritical carbon dioxide cold-hot combined supply device |
| CN110806035A (en) * | 2019-11-06 | 2020-02-18 | 上海复璐帝流体技术有限公司 | Transcritical carbon dioxide refrigeration method and device thereof |
| CN110920647A (en) * | 2019-12-23 | 2020-03-27 | 甘肃一德新能源设备有限公司 | Sterilization carbon dioxide heat pump locomotive air conditioner cooling unit and use method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE10313850B4 (en) * | 2003-03-21 | 2009-06-04 | Visteon Global Technologies, Inc., Dearborn | Refrigerant circuit with two-stage compression for a combined refrigeration system and heat pump operation, especially for motor vehicles |
| JP2008224206A (en) * | 2008-04-02 | 2008-09-25 | Mayekawa Mfg Co Ltd | Dual refrigerating cycle device |
| CN202254464U (en) * | 2011-10-14 | 2012-05-30 | 天津城市建设学院 | Trans-critical carbon dioxide (CO2) circulating refrigeration system |
| CN103512256A (en) * | 2013-09-22 | 2014-01-15 | 孙西峰 | Refrigerating system and air conditioner |
| CN104075522A (en) * | 2014-07-10 | 2014-10-01 | 安徽红叶节能电器科技有限公司 | Energy supply method for circulating fan of household carbon dioxide refrigerator |
| CN205090654U (en) * | 2015-08-31 | 2016-03-16 | 黑龙江爱科德科技有限公司 | Cold and hot antithetical couplet of carbon dioxide doublestage supplies system |
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Address after: 225127 No. 217 West Development Road, Jiangsu, Yangzhou Patentee after: HEILONGJIANG ARCO TECHNOLOGY CO., LTD. Address before: 150000 Lin Cun, Xiangyang Township head, Xiangfang District, Heilongjiang, Harbin Patentee before: HEILONGJIANG ARCO TECHNOLOGY CO., LTD. |