压缩机转速对空气源热泵冷热水机组性能影响

Influence of compressor speed on performance of air source heat pump cold and hot water unit

中文关键词: 空气源热泵  冷热水机组  压缩机转速  系统性能

英文关键词: air source heat pump  cold and hot water unit  speed of compressor  system performance

中文摘要:

      针对空气源热泵冷热水机组在高温及低温环境下系统压缩机转速不匹配、系统性能衰减严重等问题，搭建了低压补气型空气源热泵冷热水机组实验台，结果表明：在43 ℃高温环境下，压缩机转速由3000升高到4500 r/min过程中，排气温度升高幅度为5.0%~11.5%，系统制冷量升高幅度为3.1%~26.9%，压缩机功率升高幅度为9.6%~11.4%；压缩机转速为3500 r/min时，制冷系数COPc达到最大值3.20。在-10 ℃低温环境下，压缩机转速由3000 r/min升高到4500 r/min过程中，排气温度升高幅度为4.6%~6.9%，系统制热量升高幅度为2.9%~24.7%，压缩机功率升高幅度为10.4%~11.5%；压缩机转速为4000 r/min时，制热系数COPh达到最大值2.98。

英文摘要:

      Aiming at the problems of unmatched system compressor speed and serious system performance degradation in air source heat pump cold and hot water units in high temperature and low temperature environments, a low-pressure air-supply air source heat pump cold and hot water unit test bench was built. The results showed:In a high temperature environment of 43 ℃, when the compressor speed is increased from 3000 r/min to 4500 r/min, the exhaust temperature increases by 5.0%~11.5%, and the system cooling capacity increases by 3.1%~26.9% , The compressor power increase range is 9.6%~11.4%; when the compressor speed is 3500 r/min, the refrigeration coefficient COPc reaches the maximum value of 3.20.In a low temperature environment of -10 ℃, when the compressor speed is increased from 3000 r/min to 4500 r/min, the exhaust gas temperature increases by 4.6%~6.9%, and the system heating capacity increases by 2.9%~24.7 %, the compressor power increase range is 10.4%~11.5%; when the compressor speed is 4000 r/min, the heating coefficient COPh reaches the maximum value of 2.98.