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Using acid number as a leading indicator of refrigeration and air conditioning system performance. Final report + Press release.

Author(s) : CARTLIDGE D., SCHELLHASE H.

Type of monograph: Report

Summary

Air conditioning and refrigeration equipment needs to provide long-term reliable use. However, over long periods of time, stress induced deterioration of the refrigerant and/or lubricant will occur which can cause changes in the system chemistry resulting in decreased operating efficiency and potentially can lead to a failure of the system. A number of degradation processes contribute to the deterioration and are reflected by changes in parameters such as acidity, moisture content, viscosity, dissolved metal content, etc., which are all related to the formation of increasing amounts of acids over time. Total acid number, which includes both mineral acids and organic acids, is therefore a useful indicator which can be used to monitor the condition of the system in order to perform remedial maintenance, when required, to prevent system failure. A literature review was performed to assess the acidity characteristics of the older mineral oil and newer polyolester refrigeration systems as well as to evaluate acid measuring techniques used in other non-aqueous systems which may be applicable for refrigeration systems. The report can be downloaded from the Web site: www.arti-21cr.org/research/completed/index.html.

Details

  • Original title: Using acid number as a leading indicator of refrigeration and air conditioning system performance. Final report + Press release.
  • Record ID : 2004-3070
  • Languages: English
  • Subject: HFCs alternatives
  • Publication: Us department of commerce, ntis (national technical information service) - United states/United states
  • Publication date: 2003/07