CN205090654U - Cold and hot antithetical couplet of carbon dioxide doublestage supplies system - Google Patents
Cold and hot antithetical couplet of carbon dioxide doublestage supplies system Download PDFInfo
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- CN205090654U CN205090654U CN201520669837.5U CN201520669837U CN205090654U CN 205090654 U CN205090654 U CN 205090654U CN 201520669837 U CN201520669837 U CN 201520669837U CN 205090654 U CN205090654 U CN 205090654U
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Abstract
The utility model provides a cold and hot antithetical couplet of carbon dioxide doublestage supplies system, this system include that the subcritical compressor of carbon dioxide, carbon dioxide stride critical compression machine, an oil separator, first condenser, first expander, the 2nd oil separator, second condenser, second expander, keep system, reservoir, a vapour and liquid separator and the 2nd vapour and liquid separator, the beneficial effect of the utility model: unit volume refrigerating output is great, superior thermodynamic property, refrigerant R134a in the expander system is at present pandemic well low temperature environmental protection refrigerant. This system can the full recovery heat of condensation, output high temperature hot water. To the throttle utilization of energy of the loss of stepping down has improved carbon dioxide's return -air pressure, has improved entire system's efficiency greatly. The heat of condensation of expander system part also obtains whole utilizations in this system, is used for improving the super -heated rate of carbon dioxide return -air.
Description
Technical field
The utility model belongs to refrigeration system technical field, particularly relates 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 purpose of this utility model is to overcome above-mentioned deficiency, provides a kind of carbon dioxide twin-stage cold-hot combined supply system.
The technical solution of the utility model 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.
The beneficial effects of the utility model:
● 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 the utility model Integral combined structure figure;
Detailed description of the invention
Below in conjunction with accompanying drawing and enforcement, the utility model is further described.
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 |
|---|---|---|---|
| CN201520669837.5U CN205090654U (en) | 2015-08-31 | 2015-08-31 | Cold and hot antithetical couplet of carbon dioxide doublestage supplies system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520669837.5U CN205090654U (en) | 2015-08-31 | 2015-08-31 | Cold and hot antithetical couplet of carbon dioxide doublestage supplies system |
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| CN205090654U true CN205090654U (en) | 2016-03-16 |
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| CN201520669837.5U Active CN205090654U (en) | 2015-08-31 | 2015-08-31 | Cold and hot antithetical couplet of carbon dioxide doublestage supplies system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105371516A (en) * | 2015-08-31 | 2016-03-02 | 黑龙江爱科德科技有限公司 | Carbon dioxide two-stage cold and heat co-generation system |
| 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 |
-
2015
- 2015-08-31 CN CN201520669837.5U patent/CN205090654U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105371516A (en) * | 2015-08-31 | 2016-03-02 | 黑龙江爱科德科技有限公司 | Carbon dioxide two-stage cold and heat co-generation system |
| 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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| C14 | Grant of patent or utility model | ||
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