CONDENSATION HEAT TRANSFER OF R-134a IN A HELICAL PIPE

被引：0
|
作者：
Han Ji-tian [1 ]
Lin Cheng-xian [2 ]
Ebadian, M. A. [2 ]
机构：
[1] Shandong Univ, Sch Energy Source & Power Engn, Jinan 250061, Peoples R China
[2] Florida Int Univ, Hemispher Ctr Environm Technol, Miami, FL 33174 USA
来源：
JOURNAL OF HYDRODYNAMICS | 2004年 / 16卷 / 02期
基金：
中国国家自然科学基金;
关键词：
condensation heat transfer; convective condensation; refrigerants; helicoidal pipes;
D O I：
暂无
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
Alternative refrigerant R-134a is considered to be ozone-friendly and a potential candidate for replacing the refrigerant R-12 in refrigeration and air-conditioning applications. This paper presents an experimental investigation on condensation heat transfer of the alternative refrigerant R-134a flowing inside a helicoidal pipe with the cooling water flowing through the annular helicoidal passage in a counter-flow direction. The heat transfer experiments were performed for R-134a mass flow flux ranging from 100 to 420 kg/m(2)s with the superheat of the inlet vapor of 2. 8 degrees C and 8. 3 degrees C, respectively. The average Nusselt numbers were experimentally determined for a helicoidal pipe with the helix axis of vertical direction. In addition, the obtained experimental results were compared with the results for R-134a condensation in straight and helicoidal pipes available in the open literature.
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页码：144 / 150
页数：7
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