کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
653824 | 885216 | 2012 | 6 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Experimental study of condensation heat transfer of R-134a flow in corrugated tubes with different inclinations Experimental study of condensation heat transfer of R-134a flow in corrugated tubes with different inclinations](/preview/png/653824.png)
This experimental study is performed to investigate condensation heat transfer coefficient of R-134a flow inside corrugated tube with different inclinations. Different inclinations of test condenser ranging from − 90° to + 90° and various flow mass velocities in the range of 87 to 253 [kg/m2s] are considered in this study. Data analysis showed that change in the tube inclination had a significant effect on condensation heat transfer behavior. At low mass velocities, and low vapor qualities, the highest condensation heat transfer coefficient was obtained for α = + 30° which was 1.41 times greater than the least one obtained for α = − 90°. The results also showed that at all mass velocities, the highest average heat transfer coefficients were achieved for α = + 30°. Based on the experimental results, a new empirical correlation is proposed to predict the condensation heat transfer coefficient of R134a flow in corrugated tubes with different inclinations.
Journal: International Communications in Heat and Mass Transfer - Volume 39, Issue 1, January 2012, Pages 138–143