最近,瑞士“西比尔”公司已研制成功了一种供大型冷藏装置用的,既无发动机又无压缩机的系统。这利系统的作用系以氨的以下特性为基础。在不大的压力下,气态氨大量地被冷水所吸收,而在温度升高的情况下,则从冷水中析出。在高温和高压下,氨的蒸气会液化,但在相同的压力和较低的温度下,当有惰性气体时,液氨则蒸发,并同时吸收大量热量。从 Recently, the Swiss “Sybil” company has developed a system for large refrigerators with neither engine nor compressor. The benefits of this system are based on the following properties of ammonia. Under a little pressure, gaseous ammonia is largely absorbed by the cold water and, at elevated temperatures, is precipitated from the cold water. Ammonia vapor liquefies at high temperatures and pressures, but at the same pressure and at lower temperatures, liquid ammonia evaporates and absorbs large amounts of heat when inert gas is present. From