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

  • 제18권8호
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  • Pages.613-619
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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

응축전열관 외부형상 변화에 따른 HFC134a의 열전달 실험

The Experimental Study on the Heat Transfer of HFC134a for Condensation Tubes with Various Enhanced Surfaces

  • 발행 : 2006.08.01
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초록

The objectives of this paper are to study the characteristics of heat transfer for enhanced tubes (19.05 mm) used in the condenser with high saturation temperatures and to provide a guideline for optimum design of a condenser using HFC134a. Three different enhanced tubes are tested at a high saturation temperature of $59.8^{\circ}C$ (16 bar); a low-fin and three turbo-C tubes.. The refrigerant, HFC134a is condensed on the outside of the tube while the cooling water flows inside the tube. The film Reynolds number varies from 130 to 330. The wall subcooling temperature ranges from $2.7^{\circ}C$ to $9.7^{\circ}C$. This study provides experimental heat transfer coefficients for condensation on the enhanced tubes. It is found that the turbo-C(2) tube provides the highest heat transfer coefficient.

키워드

참고문헌

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