Abstract
A new mechanical subcooling ejector refrigeration system (NERS) is proposed. An additional jet-pump (liquid-gas ejector) was used to subcool the refrigerant from condenser in this new system. Compared with a conventional ejector refrigeration system (CERS), the NERS has larger subcooling degree. A mathematical model was developed and simulation calculation was carried out for environment-friendly refrigerants R600a and R152a. The effect of generator temperature and mechanical subcooling degree on the performance of the NERS was mainly discussed, and the performance of the NERS was compared with that of the CERS. Results of simulation show that the NERS can efficiently improve the coefficient of performance (COP). COP can be improved about 12% for R600a and about 11% for R152a. Though slightly more pump work is consumed in NERS, from view of exergy, the NERS can save 7%-8% input exergy. The analysis indicates that an optimum mechanical subcooling degree should exist for a refrigerant and operating condition.
| Original language | English |
|---|---|
| Pages (from-to) | 164-168 |
| Number of pages | 5 |
| Journal | Harbin Gongye Daxue Xuebao/Journal of Harbin Institute of Technology |
| Volume | 40 |
| Issue number | 1 |
| State | Published - Jan 2008 |
Keywords
- Ejector refrigeration
- Jet-pump
- Mechanical subcooling