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

Citation
R. Kumar et al., Augmentation of heat transfer during filmwise condensation of steam and R-134a over single horizontal finned tubes, INT J HEAT, 45(1), 2002, pp. 201-211
Citations number
14
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Mechanical Engineering
Journal title
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
ISSN journal
0017-9310 → ACNP
Volume
45
Issue
1
Year of publication
2002
Pages
201 - 211
Database
ISI
SICI code
0017-9310(200201)45:1<201:AOHTDF>2.0.ZU;2-U
Abstract
An experimental investigation has been carried out to augment the heat tran sfer rate by enhancing the heat transfer coefficient during the condensatio n of pure vapours of steam and R-134a over horizontal finned tubes. The stu dy was conducted for plain tubes, circular integral-fin tubes (CIFTs), spin e integral-fin tubes (SIFTS) and parially spined circular integral-fin tube s (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.