CN105371516A - Carbon dioxide two-stage cold and heat co-generation system - Google Patents
Carbon dioxide two-stage cold and heat co-generation system Download PDFInfo
- Publication number
- CN105371516A CN105371516A CN201510547794.8A CN201510547794A CN105371516A CN 105371516 A CN105371516 A CN 105371516A CN 201510547794 A CN201510547794 A CN 201510547794A CN 105371516 A CN105371516 A CN 105371516A
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- Prior art keywords
- carbon dioxide
- decompressor
- reservoir
- compressor
- condenser
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- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims abstract description 76
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims abstract description 38
- 239000001569 carbon dioxide Substances 0.000 title claims abstract description 38
- 239000007788 liquid Substances 0.000 claims abstract description 16
- 238000012423 maintenance Methods 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 4
- 239000003507 refrigerant Substances 0.000 abstract description 3
- LVGUZGTVOIAKKC-UHFFFAOYSA-N 1,1,1,2-tetrafluoroethane Chemical compound FCC(F)(F)F LVGUZGTVOIAKKC-UHFFFAOYSA-N 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000001105 regulatory effect Effects 0.000 abstract description 2
- 230000006835 compression Effects 0.000 description 5
- 238000007906 compression Methods 0.000 description 5
- 238000001704 evaporation Methods 0.000 description 5
- 238000005057 refrigeration Methods 0.000 description 4
- 238000009833 condensation Methods 0.000 description 3
- 230000005494 condensation Effects 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000002826 coolant Substances 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000003306 harvesting Methods 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
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- Carbon And Carbon Compounds (AREA)
Abstract
Disclosed is a carbon dioxide two-stage cold and heat co-generation system. The carbon dioxide two-stage cold and heat co-generation system comprises a carbon dioxide subcritical compressor, a carbon dioxide transcritical compressor, a first oil separator, a first condenser, a first expander, a second oil separator, a second condenser, a second expander, a maintaining system, a liquid storage, a first gas and liquid separator and a second gas and liquid separator. The system has the beneficial effects that the unit volume refrigerating capacity is large, and the excellent thermodynamic property is achieved; and a refrigerant R134a in an expander system is a generally-populous medium and low temperature environment-friendly refrigerant at present. The system can recycle all condensate heat, and high-temperature hot water can be produced. Energy lost during pressure reduction by regulating flow is utilized, the back pressure of carbon dioxide is improved, and the efficiency of the whole system is greatly improved. The condensate heat of the expander system of the system is overall utilized, and the superheat degree of returned carbon dioxide is improved.
Description
Technical field
The invention belongs to refrigeration system technical field, particularly relate to a kind of carbon dioxide twin-stage cold-hot combined supply system.
Background technology
Its object of twin-stage form is adopted to be all generally to obtain lower evaporating temperature in conventional refrigeration, in cyclic process, there is a large amount of condensation heat not to be used effectively, in throttling process, also have part energy loss simultaneously, reduce the efficiency of whole system.
Summary of the invention
The object of the invention is to overcome above-mentioned deficiency, a kind of carbon dioxide twin-stage cold-hot combined supply system is provided.
Technical scheme of the present invention is such: this system comprises carbon dioxide sub critical compressor, CO 2 cross-critical compressor, the first oil eliminator, the first condenser, the first decompressor, the second oil eliminator, the second condenser, the second decompressor, maintenance system, reservoir, the first gas-liquid separator and the second gas-liquid separator, the system that wherein maintains connects reservoir, carbon dioxide sub critical compressor outlet is in parallel with reservoir outlet enters CO 2 cross-critical suction port of compressor, CO 2 cross-critical compressor outlet connects the first oil eliminator successively, first condenser and the first decompressor, first decompressor connects subcooler entrance, subcooler outlet connects reservoir entrance, an outlet of reservoir connects the second decompressor by regenerator, second decompressor is connected regenerator by evaporimeter with the first gas-liquid separator, regenerator connects carbon dioxide sub critical compressor by the second condenser.
The first described decompressor is connected the second decompressor by the second oil eliminator, the second condenser, subcooler with the second gas-liquid separator successively.
Described maintenance Operation system setting has heat exchange coil, and heat exchange coil is arranged on reservoir inside.
Described maintenance internal system is provided with the compressor that reservoir can be made to lower the temperature.
Beneficial effect of the present invention:
● the cold-producing medium that this system adopts is all environmental protection refrigerant, and carbon dioxide is as pure natural cold-producing medium, and depletion of the ozone layer latent energy value is 0, and global warming potential is 1, and refrigerating effect per unit swept volume is comparatively large, superior thermodynamic property; Refrigerant R134a in expander system is current pandemic middle low-temperature environment-friendly cold-producing medium.
● this system can whole recovering condensing heats, output high-temperature-hot-water.
● the decompressor added in this system, by the Energy harvesting of the loss of reducing pressure by regulating flow, improves the back pressure of carbon dioxide, substantially increases the efficiency of whole system.
● in this system, the condensation heat of expander system part is also all utilized, and is used for improving the degree of superheat of carbon dioxide return-air.
Accompanying drawing illustrates:
Fig. 1 is Integral combined structure figure of the present invention;
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention will be further described with enforcement.
As shown in Figure 1, this system comprises carbon dioxide sub critical compressor, CO 2 cross-critical compressor, the first oil eliminator, the first condenser, the first decompressor, the second oil eliminator, the second condenser, the second decompressor, maintenance system, reservoir, the first gas-liquid separator and the second gas-liquid separator, the system that wherein maintains connects reservoir, carbon dioxide sub critical compressor outlet is in parallel with reservoir outlet enters CO 2 cross-critical suction port of compressor, CO 2 cross-critical compressor outlet connects the first oil eliminator successively, first condenser and the first decompressor, first decompressor connects subcooler entrance, subcooler outlet connects reservoir entrance, an outlet of reservoir connects the second decompressor by regenerator, second decompressor is connected regenerator by evaporimeter with the first gas-liquid separator, regenerator connects carbon dioxide sub critical compressor by the second condenser.
The first described decompressor is connected the second decompressor by the second oil eliminator, the second condenser, subcooler with the second gas-liquid separator successively.
Described maintenance Operation system setting has heat exchange coil, and heat exchange coil is arranged on reservoir inside.
Described maintenance internal system is provided with the compressor that reservoir can be made to lower the temperature.
Native system main flow
This carbon dioxide two-bed system adopts natural carbon dioxide coolant as cycle fluid, carbon dioxide enters CO 2 cross-critical compressor after mixing with the cryogenic gas from reservoir after the compression of subcritical compression machine and is again compressed, the carbon dioxide of higher exhaust gas temperature will be produced, these heats can the hot water of the highest 85 DEG C of output, carbon dioxide after being condensed enters the first decompressor, to the first decompressor acting, after making carbon dioxide step-down, enter reservoir through excessively cold.It is excessively cold that liquid in reservoir carries out secondary through regenerator, enters the second decompressor, and after acting, step-down gets back to compressor air suction mouth after entering evaporator evaporation heat absorption.
The inside of intrasystem reservoir is provided with coil pipe, outside maintenance system is reservoir internal cooling by coil pipe, reservoir internal temperature is maintained within a certain range, a part of gas of reservoir also can get back to the mid portion of two-stage compressor simultaneously, is the exhaust cooling of subcritical compression machine.
The R134a in high-pressure carbon dioxide promotion decompressor is utilized in expander system, two decompressors are connected, and define two stages of compression to cold-producing medium, by the working medium after compressing after oil content, enter cold plate to change and transfer heat to low pressure return-air, make carbon dioxide return-air reach superheat state.R134a cold-producing medium after cooling, enters plate type heat exchanger evaporation endothermic, and the heat of carbon dioxide after absorption condensation, makes it reach supercooled state.Eventually pass gas to divide and get back to decompressor 2.
The principle of native system
The kind of refrigeration cycle of conventional refrigerants is all below critical point, critical point due to carbon dioxide is higher only has 31 DEG C, critical pressure is up to arriving 7.38MPa, so carbon dioxide coolant can carry out kind of refrigeration cycle when 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 adopts carbon dioxide sub critical compressor to dock with Trans-critical cycle compressor and forms two stages of compression, makes the minimum evaporating temperature of this system to reach-50 DEG C, can output maximum temperature be also the hot water of 85 DEG C.The use of decompressor in system, makes its maximized energy that make use of throttling process, considerably increases the efficiency of whole system.
Claims (4)
1. a carbon dioxide twin-stage cold-hot combined supply system, is characterized in that: this system comprises carbon dioxide sub critical compressor, CO 2 cross-critical compressor, the first oil eliminator, the first condenser, the first decompressor, the second oil eliminator, the second condenser, the second decompressor, maintenance system, reservoir, the first gas-liquid separator and the second gas-liquid separator, the system that wherein maintains connects reservoir, carbon dioxide sub critical compressor outlet is in parallel with reservoir outlet enters CO 2 cross-critical suction port of compressor, CO 2 cross-critical compressor outlet connects the first oil eliminator successively, first condenser and the first decompressor, first decompressor connects subcooler entrance, subcooler outlet connects reservoir entrance, an outlet of reservoir connects the second decompressor by regenerator, second decompressor is connected regenerator by evaporimeter with the first gas-liquid separator, regenerator connects carbon dioxide sub critical compressor by the second condenser.
2. carbon dioxide twin-stage cold-hot combined supply system according to claim 1, is characterized in that: the first described decompressor is connected the second decompressor by the second oil eliminator, the second condenser, subcooler with the second gas-liquid separator successively.
3. carbon dioxide twin-stage cold-hot combined supply system according to claim 1, is characterized in that: described maintenance Operation system setting has heat exchange coil, and heat exchange coil is arranged on reservoir inside.
4. carbon dioxide twin-stage cold-hot combined supply system according to claim 1, is characterized in that: described maintenance internal system is provided with the compressor that reservoir can be made to lower the temperature.
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 |
|---|---|
| CN105371516A true CN105371516A (en) | 2016-03-02 |
| CN105371516B CN105371516B (en) | 2017-10-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510547794.8A Active CN105371516B (en) | 2015-08-31 | 2015-08-31 | Carbon dioxide twin-stage cold-hot combined supply system |
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Cited By (4)
| 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 |
| 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 |
| WO2021089000A1 (en) * | 2019-11-06 | 2021-05-14 | 上海复璐帝流体技术有限公司 | Transcritical carbon dioxide refrigeration method and device |
| CN113028671A (en) * | 2021-04-19 | 2021-06-25 | 南京久鼎制冷空调设备有限公司 | With CO2Refrigerating system as refrigerant and secondary refrigerant system thereof |
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| DE10313850A1 (en) * | 2003-03-21 | 2004-10-07 | Visteon Global Technologies, Inc., Dearborn | Coolant circulation operating method e.g. for combined coolant- and heat-pump-drive in motor vehicle, requires expanding coolant at evaporation pressure in the coolant unit operation |
| 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 |
-
2015
- 2015-08-31 CN CN201510547794.8A patent/CN105371516B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10313850A1 (en) * | 2003-03-21 | 2004-10-07 | Visteon Global Technologies, Inc., Dearborn | Coolant circulation operating method e.g. for combined coolant- and heat-pump-drive in motor vehicle, requires expanding coolant at evaporation pressure in the coolant unit operation |
| 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 |
Cited By (4)
| 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 |
| WO2021089000A1 (en) * | 2019-11-06 | 2021-05-14 | 上海复璐帝流体技术有限公司 | Transcritical carbon dioxide refrigeration method and device |
| 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 |
| CN113028671A (en) * | 2021-04-19 | 2021-06-25 | 南京久鼎制冷空调设备有限公司 | With CO2Refrigerating system as refrigerant and secondary refrigerant system thereof |
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| Publication number | Publication date |
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| CN105371516B (en) | 2017-10-10 |
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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. |
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