Korean Journal of Air-Conditioning and Refrigeration Engineering (설비공학논문집)

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
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Modelling of an Automotive Block Type Thermostatic Expansion Valve

자동차용 블록식 온도감응 팽창밸브의 모델링

  • Won, Sung-Pil (School of Mechanical Engineering, University of Ulsan)
  • 원성필 (울산대학교 기계공학부)
  • Received : 2011.01.26
  • Accepted : 2011.02.09
  • Published : 2011.04.10
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Abstract

The objective of this study is to propose two empirical correlations to predict the mass flow rate through an automotive block type thermostatic expansion valve and then to evaluate the correlations. The first correlation is deduced by modifying the basic equation of the orifice meter for the mass flow rate and the second correlation is deduced by using the Buckingham's ${\pi}$ theorem. The first correlation showed very good agreement on the measured data for R134a, given by Monforte. Average relative deviation and standard deviation of it are 2.5% and 1.6%, respectively. The second correlation agreed on the same measured data with a little greater deviations. The two correlations may apply to common expansion valves which have different geometrical sizes of the same shape.

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References

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