【摘要】 对氨水吸收式制冷GAX循环进行了理论分析,阐述了GAX循环存在临界热源温度的原因,编制了计算机模拟程序,分别对氨水吸收式制冷GAX循环与一般循环系统进行了理论计算与比较.得出了GAX循环性能与热源温度之间的变化关系:在蒸发温度为3℃、冷却水为32℃的条件下,GAX循环系统最低临界热源温度为110℃;在蒸发温度为3℃时,GAX循环系统最低临界热源温度值随冷却水温度的提高而升高;只有热源温度高于临界温度值时,GAX循环性能系数才能得到提高.所得结论为在实际氨水吸收式制冷系统中是否采用GAX循环提供了决策依据.更多还原

【Abstract】 The ammonia-water absorption refrigeration generator absorber heat exchange(GAX) cycle was analyzed theoretically.The reason of the existence of critical heat reservoir temperature in GAX cycle was elaborated.Corresponding simulation program was programmed.Theoretical calculation on ammonia-water absorption refrigeration GAX cycle and common cycle were performed respectively,and their results were compared.The relation between the performance of GAX cycle and the heat reservoir temperature is obtained.When evaporating temperature is 3℃ and temperature of cooling water is 32℃,the lowest critical heat reservoir temperature of GAX cycle is 110℃.Meanwhile,the lowest critical heat reservoir temperature of GAX cycle would increase when the temperature of cooling water increases.Only when heat reservoir temperature is higher than critical heat reservoir temperature can the performance of GAX cycle be improved.The conclusions drawn in this paper provide deterministic standard in considering whether to adopt the GAX cycle in ammonia-water absorption refrigeration.更多还原