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New refrigeration system using CO vapor-solid as refrigerant
- HUANG Dongping1, DING Guoliang1, QUACK Hans2
Author information
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1.Institute of Refrigeration and Cryogenics Engineering, Shanghai Jiao Tong University; 2.Institute of Refrigeration and Cryogenics Technology, Technical University of Dresden
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History
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| Published |
| 05 Dec 2008 |
| Issue Date |
| 05 Dec 2008 |
A refrigerant must be in the vapor-liquid phase in a vapor-compression refrigeration system, therefore, CO2 cannot be used as a refrigerant for temperatures lower than -56°C because solid CO2 will form under the triple point temperature of -56°C. A refrigeration system with CO2 vapor-solid particles as refrigerant is put forward, by which a temperature lower than the triple point is achieved. An adjustable nozzle, a sublimator, a high-pressure regulating valve and a low-pressure regulating valve are used to replace the conventional evaporator. Theoretical cycle analysis of the refrigeration system shows that its COP can be 50% higher than that of the conventional one.
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References
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