Enhancement of Condensation Heat Transfer Rate of the Air-Steam Mixture on a Passive Condenser System Using Annular Fins
- Authors
- Jang, Yeong-Jun; Choi, Dong-Jae; Kim, Sin; Hyun, Myung-Taek; Lee, Yeon-Gun
- Issue Date
- Nov-2017
- Publisher
- MDPI AG
- Keywords
- condensation; passive condenser system; vertical tube; annular fin
- Citation
- ENERGIES, v.10, no.11
- Journal Title
- ENERGIES
- Volume
- 10
- Number
- 11
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/3729
- DOI
- 10.3390/en10111777
- ISSN
- 1996-1073
- Abstract
- This paper presents an experimental investigation on the enhancement of the heat transfer rate of steam condensation on the external surfaces of a vertical tube with annular fins. A cylindrical condenser tube, which is 40 mm in outer diameter and 1000 mm in length, with annular disks of uniform cross-sectional area is fabricated in the manner of ensuring perfect contact between the base surface and fins. A total of 13 annular fins of 80 mm diameter were installed along the tube height in order to increase the effective heat transfer area by 85%. Through a series of condensation tests for the air-steam mixture under natural convection conditions, the heat transfer data was measured in the pressure range of between 2 and 5 bar, and the air mass fraction from 0.3 to 0.7. The rates of heat transfer of the finned tube are compared to those that are measured on a bare tube to demonstrate the enhanced performance by extended surfaces. In addition, based on the experimental results and the characteristics of steam condensation, the applicability of finned tubes to a large condenser system with a bundle layout is evaluated.
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Collections - College of Engineering > School of Energy System Engineering > 1. Journal Articles
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