Air purging in ammonia refrigeration plants.

In this article, the author shall reviews the types of non-condensable gases that can accumulate in refrigeration systems, their consequences, various methods of purging, purger operation, application considerations and factors that influence purger performance. Our emphasis shall be on vapour compression based industrial refrigeration systems that use anhydrous ammonia
as the refrigerant, because this scenario covers the majority of industrial refrigeration systems in use today.