Experimental study on two-phase condensation heat transfer and pressure drop of R-134a flowing in a dimpled tube

详细信息    查看全文

• 作者：Kanit Aroonrat ; Somchai Wongwises ; ^{somchai.won@kmutt.ac.th}
• 关键词：Condensation ; Heat transfer ; Pressure drop ; Dimpled tube
• 刊名：International Journal of Heat and Mass Transfer
• 出版年：2017
• 出版时间：March 2017
• 年：2017
• 卷：106
• 期：Complete
• 页码：437-448
• 全文大小：1242 K
• 卷排序：106

文摘

Condensation of R-134a flowing inside a dimpled tube having an inner diameter of 8.1 mm and length of 1.5 m is investigated. The test section is a horizontal counter-flow double-tube heat exchanger. The effects of heat flux, mass flux, and saturation temperature are examined. The dimpled tube enhances the Nusselt number around 1.3–1.4 times. The two-phase friction factor rises around 2.3–3.8 times as compared to the smooth tube.