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수평 평활관내 R245fa의 흐름 응축 열전달 특성
Flow Condensation Heat Transfer Characteristic of R245fa in a Horizontal Plain Tube

박현신   (인하대학교 대학원UU0001092  ); 박기정   (인하대학교 대학원UU0001092  ); 정동수   (인하대학교 기계공학과UU0001092  );
  • 초록

    Flow condensation heat transfer coefficients(HTCs) of R123 and R245fa are measured in a horizontal plain tube. The main test section in the experimental flow loop is made of a plain copper tube of 9.52 mm outside diameter and 530 mm length. The refrigerant is cooled by passing cold water through an annulus surrounding the test section. Tests are performed at a fixed saturation temperature of $50\;{\pm}\;0.2\;^{\circ}C$ with mass fluxes of 50, 100, $150\;kg/m^2s$ and heat flux of $7.3{\sim}7.7\;kW/m^2$ . Heat transfer data are obtained in the vapor quality range of $10{\sim}90%$ . Test results show that the flow condensation HTCs of R245fa are overall 7.9% higher than those of R123 at all mass fluxes. The pressure drop of R245fa is smaller than that of R123 at the same heat flux. In conclusion, R245fa is a good candidate to replace ozone depleting R123 currently used in chillers from the view point heat transfer and environmental properties.


  • 주제어

    열전달 계수 .   흐름 응축 .   냉매R245fa .   냉매123 .   칠러 .   응축기.  

  • 참고문헌 (22)

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  • 이 논문을 인용한 문헌 (1)

    1. Han, Hwa-Taik ; Choi, Chang-Ho ; Lee, Dae-Young ; Kim, Seo-Young ; Kwon, Yong-Il ; Choi, Jong-Min 2009. "Recent Progress in Air-Conditioning and Refrigeration Research: A Review of Papers Published in the Korean Journal of Air-Conditioning and Refrigeration Engineering in 2008" 설비공학논문집 = Korean journal of air-conditioning and refrigeration engineering, 21(12): 715~732     

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