Proceedings of the SAREK Conference (대한설비공학회:학술대회논문집)
- 2005.11a
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- Pages.451-456
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- 2005
Performance and Parameter Comparison between single stage and Two-Stage Compression/Absorption Heat Pump System
단단 및 2단 압축/흡수 히트펌스시스템의 성능 및 중요인자비교 분석
- Tian, Huaizhang (Xi'an jiaotong University) ;
- Park, Seong-Ryong (Korea Institute of Energy Research)
- ;
- 박성룡 (한국에너지기술연구원(KIER))
- Published : 2005.11.25
Abstract
The mathematical model for the heat exchangers of absorber and desorber is made in the elementary control volume method and the thermodynamic properties of working fluid. water/ammonia mixture. are calculated by some fundamental subroutines in RefProp 7.0 and flash subroutines made by authors The simulation results show that two-stage cycle has higher COP than single stage if temperature lift is high: the performance of single stage compression cycle can be improved by increase of absorber pressure. but the performance of two-stage compression cycle can not be improved in this way : the compressor discharging temperature of two-stage compression is much lower than that of single stage cycle. which is very important to the safety operation of CA heat pump. Major parameter comparison between the cycles at their optimal configurations is also given.