International Journal of Air-Conditioning and Refrigeration

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
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Characteristics of Hydrocarbon Refrigerants on Evaporating Heat Transfer and Pressure Drop

  • Lee Ho-Saeng (Graduate School, Refrigeration and Air-Conditioning Engineering, School of Mechanical Engineering, Pukyong National University) ;
  • Phan Thanh Tong (Graduate School, Refrigeration and Air-Conditioning Engineering, School of Mechanical Engineering, Pukyong National University) ;
  • Yoon Jung-In (School of Mechanical Engineering, Pukyong National University)
  • Published : 2006.09.10
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Abstract

Experimental results for heat transfer characteristics and pressure gradients of HCs refrigerants R-290, R-600a, R-1270 and HCFC refrigerant R-22 during evaporating inside horizontal double pipe heat exchangers are presented. The test sections which has one tube diameter of 12.70 mm with 0.89 mm wall thickness, another tube diameter of 9.52 mm with 0.76 mm wall thickness are used for this investigation. The local evaporating heat transfer coefficients of hydrocarbon refrigerants were higher than that of R-22. The average evaporating heat transfer coefficient increased with the increase of the mass flux, with the higher values in hydrocarbon refrigerants than R-22. Hydrocarbon refrigerants have higher pressure drop than R-22. Those results from the investigation can be used in the design of heat exchangers using hydrocarbons as the refrigerant for the air-conditioning systems.

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References

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