冷库氨双级压缩制冷系统最佳工况研究

A Study of Optimum Conditions for Two-Stage Compression Ammonia Refrigeration System

本文研究了氨活塞式双级压缩制冷系统的最佳中间温度、最佳高、低压级输气容积比和最大COP值随冷凝温度和蒸发温度的变化规律 ,并采用微机程序确定任意工况条件下的最佳中间状态和任意中间状态下高、低压级输气容积比与中间温度的关系 ,进一步比较了 1 2和 1

The internal relations of the system C.O.P. with the cylinder volume ratio and the corresponding intermediate parameters for a two-stage compression ammonia refrigeration system under each possible external conditions(i.e., each pair of condensing temperature and evaporation temperature) were studied. The values of optimum C.O.P. and the corresponding parameters called as optimum cylinder volume ratio and optimum intermediate temperature are calculated by computer program. The results are listed in Table 1. Further, the cylinder volume ratio is fixed as constant 1/2 and 1/3 respectively, the system efficiency as well as the C.O.P. and its corresponding intermediate temperatures under both cases are compared.