【摘要】 为研究双级空气源热泵热水器运行参数对其性能的影响,采用稳态仿真的方法对双级压缩热泵系统进行仿真模拟,建立了各部件模型,并对中间冷却器建立模型,采用R134a作为制冷剂。结果表明:系统性能系数(COP)和制热量随环境温度的降低而减小,在同一蒸发温度下随冷凝温度增高而减小;单、双级系统在环境温度5℃以上时应进行切换,低于-20℃时不宜于运行。更多还原

【Abstract】 To study the impact of operating parameters of two stage air source heat pump water heater on its performance and shorten the development cycle unit,a system model of the two stage compression heat pump water heater was built by the steady state simulation method,and the model of middle chiller was also built using R134 a refrigerant. The result indicated that system COP and heat output decreased with the decrease of environmental temperature,and decreased with the condensing temperature increase at the same evaporation temperature. A turning point came when the environmental temperature reached 5 ℃,and the two stage compression will not be suitable to be used at or below- 20 ℃.更多还原