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Refrigerant leakage control for R-290 in split type refrigeration and air conditioning systems.

Number: pap. n. 36

Author(s) : COLBOURNE D., HÜHREN R., RAJADHYAKSHA D. D., et al.

Summary

Safety standards are often cited as the major barrier to using hydrocarbon (HC) refrigerants in medium to large capacity split-type air conditioning and refrigeration systems. Whilst the otherwise technical aspects associated with the application of HCs are attractive – high potential efficiency, good material compatibility, compact systems, etc – their use is often hindered due to the obstructive charge size formulas within safety standards. Regrettably, these current requirements neglect to consider that other measures could be applied to system design and operation to prevent flammable concentrations occurring, even with the charge size exceeding prescribed values. This article offers a number of design features involving sensing methods and mitigation actions which can reduce leak quantities and floor concentrations. Experimental work is presented and results included for a variety of different leak conditions and combinations of sensing methods and mitigation actions. Lastly, a method is proposed for routine laboratory testing of equipment in order to determine leaked quantity and effectiveness of the integrated safety concepts.

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Pages: 10 p.

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Details

  • Original title: Refrigerant leakage control for R-290 in split type refrigeration and air conditioning systems.
  • Record ID : 30008916
  • Languages: English
  • Source: Compressors 2013: 8th International Conference on Compressors and Coolants.
  • Publication date: 2013/09/02

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