一、开发前景氨是最古老的一种制冷工质 ,于 1860年问世的氨吸收式制冷机是制冷机的鼻祖。但是 ,氨吸收式制冷机体积大、重量重 ,且热效率低。因此 ,当氨压缩式制冷机问世后 ,氨吸收式冷机的市场愈来愈小 ,仅在原有余热资源又需大量低温冷源 (0℃以下 )的化工及工艺流程中使用 First, the development prospects Ammonia is the oldest refrigerant, the advent of ammonia absorption chillers in 1860 is the originator of the refrigerator. However, ammonia absorption refrigerators are bulky, heavy, and have low thermal efficiency. Therefore, when the advent of ammonia compression refrigerators, ammonia absorption chiller market is getting smaller and smaller, only in the original waste heat resources but also a large number of low-temperature cold source (0 ℃ below) chemical and process flow used