66 / 2019-08-04 18:08:51

Performance analysis of a modified domestic refrigerator-freezer cycle with dual ejector

Dual ejector, Domestic refrigerator-freezer, Energy, Exergy, Performance enhancement.

全体主题 > 环保型制冷剂及其系统

This paper proposes a modified vapor-compression refrigeration cycle (MVRC) with dual ejector for a dual evaporator refrigerator-freezer. In the MVRC cycle, two ejectors and a flash tank are introduced based on a conventional vapor-compression refrigeration cycle (CVRC). The performance comparison between the two cycles is theoretically conducted using energy and exergy analysis methods. The simulation results demonstrate that the performances of the MVRC cycle are distinctly superior to those of the CVRC cycle under given operating conditions. The use of two ejectors reduces the compressor pressure ratio by up to 23.10%. The maximum improvements of the coefficient of performance and volumetric cooling capacity could reach up to 13.75% and 31.56%, respectively. Simultaneously, exergy analysis indicates that the exergy efficiency can be improved maximally by 12.07% and the total exergy destruction can be reduced maximally by 13.70%. Overall, the performance comparison shows that the application of MVRC cycle on domestic refrigerator-freezer is potential.