Based on the theoretical analysis, the mathematic model of each component is established, the calculating program is made and the influence of the concentration of the ammonia and the condensing temperature on the COP of the refrigerator are calculated.

• 在理论分析的基础上建立了各组成部件的数学模型,编制运算程序,对制冷过程进行了数值模拟,得到了氨水浓度、系统压力等与制冷机COP性能系数间的关系。