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research-article

Heat trtansfer enhancement of double tube type heat exchanger by petal shaped tube (Optimum tube shape)

[+] Author and Article Information
Toshihiko Shakouchi

Professor, Graduate School of Engineering, Mie University, Kurimamachiya-cho 1577, Tsu-shi, Mie 514-8507, Japan
shako@mach.mie-u.ac.jp

Yusuke Matsumoto

Master's Student, Graduate School of Engineering, Mie University, Kurimamachiya-cho 1577, Tsu-shi, Mie 514-8507, Japan
matsu-ys@ees.mach.mie-u.ac.jp

Koichi Tsujimoto

Professor, Graduate School of Engineering, Mie University, Kurimamachiya-cho 1577, Tsu-shi, Mie 514-8507, Japan
tujimoto@mach.mie-u.ac.jp

Toshitake Ando

Associate Professor, Graduate School of Engineering, Mie University, Kurimamachiya-cho 1577, Tsu-shi, Mie 514-8507, Japan
ando@mach.mie-u.ac.jp

1Corresponding author.

ASME doi:10.1115/1.4041347 History: Received April 11, 2018; Revised July 27, 2018

Abstract

Heat exchanger is used widely in many fields, and various kinds of exchanger have been developed according to the practical application. But, recently heat exchanger with a high efficient or compact more is desired from the viewpoint of energy conservation, and has been developed new one such as a fin tube type compact one, a double tube type one having the inner pipe with a special geometry, and others. In this study, the flow and heat transfer characteristics of petal-shaped double tube with a large wetted perimeter of 6 and 5 petals and 5 shallow petals, and the effect of tube shape on the heat transfer and heat transfer efficiency are examined experimentally. The heat transfer of double tube with a petal shaped inner tube will be increased because of the large wetted perimeter, but the pressure loss by friction will be increased. The optimum shape of petal shaped double tube having a high heat transfer performance, efficiency, most will be shown.

Copyright (c) 2018 by ASME
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