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Title: Prediction of heat transfer coefficient during condensation of water and R-134a on single horizontal integral-fin tubes
Authors: Kumar R.
Varma H.K.
Mohanty, Bikash
Agrawal K.N.
Published in: International Journal of Refrigeration
Abstract: This paper presents a few salient features of an investigation carried out to study the heat transfer augmentation during condensation of water and R-134a vapor on horizontal integral-fin tubes. The experimental investigation was performed on two different experimental set-ups for water and R-134a. The test-sections were manufactured by machining fins over plain copper tubes of 24.4 ± 0.6 mm outside diameter. The performance of two types of finned tubes viz. circular integral-fin tubes (CIFTs) and spine integral-fin tubes (SIFTs) was studied for the condensation of water and R-134a. These tubes were positioned one by one inside the test-condenser to perform the experiments. All together the experiments were conducted for the condensation on 10 different test-section tubes. With the help of the experimental results, authors have developed an empirical equation. This equation predicts the condensing heat transfer coefficient from their own experimental data for the condensation over CIFTs and SIFTs within a range of ± 15% and experimental data of other thirteen investigators in a range of ± 35% for condensation of water and different refrigerants. © 2001 Elsevier Science Ltd and IIR. All rights reserved.
Citation: International Journal of Refrigeration (2002), 25(1): 111-126
Issue Date: 2002
Keywords: Condensation
Enhanced surface
Heat transfer
Heat transfer coefficient
ISSN: 1407007
Author Scopus IDs: 55389796000
Author Affiliations: Kumar, R., Mechanical Engineering Group, Birla Institute of Technology and Science, Pilani-333 031, 333 03, India
Varma, H.K., Mechanical Engineering Department, AKG Engineering College, Ghaziabad 201 002, India
Mohanty, B., Chemical Engineering Department, University of Roorkee, Roorkee-247 667, India
Agrawal, K.N., Mechanical Engineering Group, Birla Institute of Technology and Science, Pilani-333 031, 333 03, India
Funding Details: The authors are grateful to the Council of Scientific and Industrial Research, New Delhi, India, for providing the financial support. The authors are also thankful to the Du Pont Inc., USA for supplying a sample of R-134a. Appendix A
Corresponding Author: Kumar, R.; Mechanical Engineering Group, Birla Inst. of Technology/Science, Pilani-333 031, India; email:
Appears in Collections:Journal Publications [ME]

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