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

  • 제18권12호
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  • Pages.971-976
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  • 2006
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  • 1229-6422(pISSN)
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  • 2465-7611(eISSN)
대한설비공학회 (The Society of Air-Conditioning and Refrigerating Engineers of Korea)
권호 표지

HFC134a 만액식 증발전열관 외부형상 변화에 따른 열전달 특성실험

Experimental Study on Heat Transfer Characteristics of HFC134a for Enhanced Tubes Used in a Flooded Evaporator

  • 발행 : 2006.12.10
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초록

The objectives of this paper are to study the characteristics of pool boiling heat transfer for enhanced tubes used in the evaporator of turbo chiller and to provide a guideline for optimum design of an evaporator using HFC134a. Three different enhanced tubes are tested at 4 different saturation temperatures. The wall super heated temperature difference ranges from $0.5^{\circ}C\;to\;3.5^{\circ}C$. The refrigerant, HFC134a evaporates on the outside of the tube while the chilled water flows inside the tube. This study provides experimental heat transfer coefficients for evaporation on the enhanced tubes. It is found that the turbo-II tube provides the highest heat transfer coefficient.

키워드

참고문헌

  1. Yoon, P. H., Kang, Y. T. and Jeong, J. H., 2004, Measurement of heat transfer coefficient in a flooded evaporator through Wilson, plot method, Korean J. Air-Conditioning and Refrigeration Eng., Vol. 16, pp.698-706
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