Abstract: Based on improved PSRK equation of state model，the simulation of industrial two-stage ammonia-water absorption refrigeration system was perfomed with the help of Aspen Plus software. Analysis of the process was made，and the best split fraction was presented. The change of ξ(coefficient of performance) with the concentrations of ammonia-water from high pressure absorption and low pressure absorption systems was deduced，and several methods to enhance the absorption were proposed.

摘要： 应用Aspen Plus模拟软件，采用改进的PSRK物性方法，完成了某厂双级氨水吸收制冷系统的模拟。分析了影响系统制冷系数ξ的因素，确定了装置的最佳分流比，得出了高低压吸收系统出口氨水浓度与ξ的定量关系，提出了几种强化吸收的方法。