瑞士西华尔公司研制出既没有马达又没有压缩机的大型冷藏系统。它的作用基于氨的下列性质:气态氨在低压时被冷水大量吸收,而在温度上升时又从水中分离出来;在高温高压时会液化;但在高压和较低温度并伴有惰性气体时液态氨会气化,且同时吸收大量的热量。该系统中包含有冷水贮存器,其中氨的含量达35%。液体部分在热交换器盘旋管内流动,加 Swetal Switzerland has developed a large refrigeration system that has neither a motor nor a compressor. Its role is based on the following properties of ammonia: gaseous ammonia is largely absorbed by cold water at low pressures and separates from the water at elevated temperatures; liquefies at high temperatures and pressures; however, at high pressures and at lower temperatures with inert gases Liquid ammonia gasifies and absorbs a large amount of heat at the same time. The system contains a cold water reservoir with ammonia content of 35%. Liquid part of the coil in the heat exchanger coil flow, plus