Share

IIR document

Contaminants in ammonia refrigeration systems.

Author(s) : COTTER D., MISSENDEN J., MAIDMENT G.

Summary

Contaminants (mainly air, water, dirt and lubricants) affect the performance of refrigeration systems. When air enters a refrigeration system it contains moisture (water). In refrigeration systems the air is usually found in the high-pressure side of the system, while the water will find its way to the low-pressure side of the system through the expansion valve. The air will cause the condensing pressure to increase in the high side of the system. The water in the low-pressure side of the system will result in a lower pressure in the evaporators to achieve the desired evaporating temperature. This explains some of the shortcomings of ammonia in DX low temperature applications. The breakdown of lubricants (i.e. sludge) differs for mineral, alkyl benzene, hydro-cracked, PAO and PAG lubricants. This has the effect of reducing the evaporator performance as it coats the internal heat transfer surfaces. The paper numerically assesses the effects of each contaminant and their accumulative effect on refrigeration system performance, outline the steps to be taken to reduce contaminants entering ammonia refrigeration system and describe how the contaminant can be removed.

Available documents

Format PDF

Pages: 2007-2

Available

  • Public price

    20 €

  • Member price*

    Free

* Best rate depending on membership category (see the detailed benefits of individual and corporate memberships).

Details

  • Original title: Contaminants in ammonia refrigeration systems.
  • Record ID : 2007-2077
  • Languages: English
  • Source: Ammonia Refrigeration Technology for Today and Tomorrow.
  • Publication date: 2007/04/19

Links


See other articles from the proceedings (31)
See the conference proceedings

Indexing