单级溴化锂吸收式制冷机有吸收器内热质交换合并和热质交换分开的两种。本文从理论上分析了两种吸收式制冷机的理论工作循环的热力系数,并进行了比较。比较结果认为,在外界热源温度相同时,热质交换分开的循环的热力系数比热质交换合并的低。但是采用热质交换分开时单 Single-stage lithium bromide absorption chillers have two types of heat and mass exchange and heat and mass exchange in the absorber. This paper theoretically analyzed the thermodynamic coefficients of the theoretical working cycles of two absorption chillers and compared them. The result of comparison shows that when the temperature of external heat source is the same, the thermal coefficient of the cycle separated by heat and mass exchange is lower than the heat and mass exchange combined. However, the use of heat and mass exchange when separate from the single