2단 압축 하이브리드 히트펌프의 특성 시뮬레이션

Abstract

초록: 기존의증기압축식과흡수식을결합한하이브리드히트펌프는50 정도의저열원에서80~90 의온수를효과적으로생산할수있다. 본연구에서는EES를사용하여2단압축하이브리드히트펌프와1단압축하이브리드히트펌프의성능을비교하였다. 동일한작동조건에서2단압축하이브리드히트펌프는1단압축하이브리드히트펌프보다약간높은COP를가지며더안정적인상태에서운전이가능한것으로나타났다. 2단압축하이브리드히트펌프에서작동유체의최대온도는1단압축하이브리드히트펌프보다40K정도낮게나타났으며이는윤활유의작동에무리없는운전상태를가능하게한다. 1단과2단하이브리드히트펌프모두UA값이증가할때COP는감소하였으며열출력은증가하였다.Abstract: Hybrid heat pumps, which combine the vapor compression and absorption heat pump cycle, can efficientlyproduce hot water of 80°–90°C from the low temperature of ~50°C. In this study, the performance of a two-stagehybrid heat pump (HHP) was compared with a single-stage hybrid heat pump using EES (Engineering EquationSolver). For the same operating conditions, the two-stage HHP showed a slightly higher COP (Coefficient OfPerformance) and more stable operating conditions than the single-stage HHP. Moreover, the maximum working fluidtemperature of the two-stage HHP was found to be lower than that of the single-stage HHP by about 40 K, whichmakes the working conditions of the lubricating oil safer. The COPs of both systems decreased with increasingUA-values. However, the heat output of the HHP was increased at the same time.