Area ratio effects to the performance of air-cooled ejector refrigeration cycle with R134a refrigerant
In this paper, the key ejector geometry parameters for an air-cooled ejector cycle using R134a with cooling capacity of 2 kW are designed by 1D analysis. Through enlarging the designed area ratios by connecting the replaceable nozzles with a main body, optimum area ratios under air-conditioning wo...
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| Main Authors: | , |
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| Other Authors: | |
| Format: | Article |
| Language: | English |
| Published: |
2013
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/98066 http://hdl.handle.net/10220/13289 |
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| Institution: | Nanyang Technological University |
| Language: | English |
| Summary: | In this paper, the key ejector geometry parameters for an air-cooled ejector cycle using R134a with cooling
capacity of 2 kW are designed by 1D analysis. Through enlarging the designed area ratios by connecting
the replaceable nozzles with a main body, optimum area ratios under air-conditioning working
conditions are studied experimentally. Three parameters, namely, the entrainment ratio, COP and cooling
capacity are evaluated, and the results show that the optimum area ratios are from 3.69 to 4.76 that are
lower than those mentioned in other studies. With a fixed area ratio, experiments also show that the
influence of the ejector area ratio on the ejector performance largely depends on the operating conditions.
Consequently, the effects of operating conditions such as primary flow pressures on the ejector system
performance are evaluated. |
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