Augmentation of heat transfer during filmwise condensation of steam and R-134a over single horizontal finned tubes

被引：42
|
作者：
Kumar, R [1 ]
Varma, HK
Mohanty, B
Agrawal, KN
机构：
[1] Birla Inst Technol & Sci, Mech Engn Grp, Pilani 333031, Rajasthan, India
[2] AKG Engn Coll, Dept Engn Mech, Ghaziabad 201001, India
[3] Univ Roorkee, Dept Chem Engn, Roorkee 247667, Uttar Pradesh, India
[4] Univ Roorkee, Dept Mech & Ind Engn, Roorkee 247667, Uttar Pradesh, India
来源：
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER | 2002年 / 45卷 / 01期
关键词：
Authors are grateful to the Council of Scientific and Industrial Research; New Delhi; India for providing the financial assistance for the completion of this work. The authors are also thankful to the Du Pont Inc; USA for supplying a sample of R-134a to conduct the experiments;
D O I：
10.1016/S0017-9310(01)00128-4
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
An experimental investigation has been carried out to augment the heat transfer rate by enhancing the heat transfer coefficient during the condensation of pure vapours of steam and R-134a over horizontal finned tubes. The study was conducted for plain tubes, circular integral-fin tubes (CIFTs), spine integral-fin tubes (SIFTS) and parially spined circular integral-fin tubes (PCIFTs). The SIFT out performed the LIFT for the condensation of R-134a by approximately 16%. However, the spines were found most effective in the bottom side of the LIFT. The PCIFTs with the spines only in the bottom side of the tube augmented the heat transfer coefficient by 20% and 11% for the condensation of steam and R-134a, respectively, in comparison to the LIFT. (C) 2001 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码：201 / 211
页数：11
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