ルームエアコン用二段圧縮ガスインジェクションサイクルの性能特性(熱工学,内燃機関,動力など)

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This paper evaluates performance characteristics of both a two-stage compression cycle with gas injection and a conventional cycle for air conditioners using R410A, with a cooling capacity of 2.8kW. To simulate performance of the injection cycle, characteristics of each component were formulated using the conventional cycle. Evaporator pressure drop was defined as a function of refrigerant flow ratio, and compressor efficiency as a function of rotational speed. This simulator shows the optimized volumetric ratio of a two-stage compressor depends on cycle conditions. The new cycle using the two-stage compressor of volumetric ratio 0.7 was also examined. The results show that, compared with the conventional cycle, the new cycle decreased the compressor input by approximately 6%, 5%, and 9% under cooling, heating, and low temperature heating conditions, respectively.
2009-05-25