【摘要】 根据空气源热泵冷热水机组的稳态仿真模型,对采用R22和R410A的空气源热泵机组进行变工况稳态工作性能预测。研究表明,采用R410A替代后,机组制冷量提高9.4%~14.7%,系统性能系数降低8.7%~10.6%;机组制热量提高13.2%~15.1%,系统性能系数降低1.2%~3.3%。采用减小压缩机理论排气量、改变换热器管路布置和换热面积、提高风量等措施来优化热泵机组工作性能,以达到降低机组能耗、提高机组运行效率的目的。性能优化后,在制冷和制热工况下,系统性能系数COP可分别提高4.17%~4.70%和1.09%~1.25%。更多还原

【Abstract】 According to a distributed parameter steady-state simulation model of air source heat pump chiller,a simulation code was implemented to calculate the performance of heat pump system using refrigerant R22 and R410A as working fluids under variable steady-state operating conditions. The research results show that system refrigeration capacity increases by(9.4%)～14.7%,the COP decreases by 8.7%～10.6%,the heating capacity increases by (13.2%)～15.1%,and the COP decreases by 1.2%～3.3%.The power consumed by compressor was reduced and COP of the system and steady-state operating performance of the system were improved by methods of employing smaller volume compressor,transforming the refrigerant circuitry arrangement of finned tube heat exchanger coils,changing the heat transfer area of single refrigerant circuitry,or increasing the airflow mass flow rate.After the performance is optimized,the COP of the system for refrigeration and heating are increased by(4.17%)～4.70% and 1.09%～1.25%,respectively.更多还原