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Evaluation of joining techniques for air-conditioning and refrigeration systems using concentration accumulation method.

Number: pap. ID152

Author(s) : YU Y., CLODIC D.

Summary

This paper is based on the study performed for AHRTI (The Air-Conditioning, Heating and Refrigeration Technology Institute) on joining techniques assessment. The purpose of this research program is to develop a guideline to minimize refrigerant leaks by using high-performance joints to ensure that designs and products are adequate to provide a leak-tight system. Sealing technologies of commonly used components (such as solenoid valves, service valves, flare fittings, filters, TXVs, sight glasses, etc.) of air-conditioning and refrigeration industry have been identified in detail. Leak flow rates of those joints have been determined using the method of concentration measurement by infrared spectrophotometry in a test chamber with high testing accuracy. A large number of tests have been performed to investigate the leakage level of these components. Measurement of valves before and after manipulations, influence of torques, and leak tightness of pressure relief valves after pressure relief have been studied as well. Results show that if components are well chosen and properly mounted, the leak flow rates of refrigeration systems can be as low as some few grams/year, but several components are, by design, very sensitive to improper mounting or require torque wrench.

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Pages: 8 p.

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Details

  • Original title: Evaluation of joining techniques for air-conditioning and refrigeration systems using concentration accumulation method.
  • Record ID : 30012405
  • Languages: English
  • Subject: General information
  • Source: 11th IIR Gustav Lorentzen Conference on Natural Refrigerants (GL2014). Proceedings. Hangzhou, China, August 31-September 2, 2014.
  • Publication date: 2014/08/02

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