Development of ammonia refrigerating technology
Ammonia,with excellent thermal-physical properties,is a kind of natural and sustainable refrigerant.The paper introduces some new technology developed recently in application of ammonia such as the cascade refrigeration cycle using CO_2 as a secondary refrigerant in an ammonia refrigerating systems, and the technology of water chiller using ammonia.Otherwise,the paper discusses the development trends of ammonia refrigeration technology,including safety guarantee,high efficiency,miniaturization and automation.