Compound Heat Transfer Enhancement by a Combination of a Helically Ribbed Tube with Twisted Tape Inserts
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概要
- 論文の詳細を見る
An experimental investigation on compound heat transfer enhancement by a combination of a helically ribbed tube with twisted tape inserts was performed. The measurement of heat transfer coefficient as well as the pressure drop was performed in order to evaluate the performance of enhanced tubes using the equal pumping power evaluation method. The heat transfer coefficient was obtained by means of Wilson’s method for the Reynolds number ranging from 300 to 30,000. The combination of smoothed tube and twisted tape having a clearance NDC = 0.07 accomplished the highest performance in the laminar region. On the other hand, the combination of helically ribbed tube and twisted tape having a clearance NDC = 0.02 gave the highest performance in the turbulent region. The reasons for these results are discussed well in terms of the compound effect and clearance effect.
- 社団法人 化学工学会の論文
- 2003-09-01
著者
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吉田 昌弘
鹿児島大学工学部 応用化学工学科
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YOSHIDA Masamichi
Department of Material Science and Engineering, Toyama University
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Yoshida Masamichi
Department Of Material Science And Engineering Toyama University
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Hasim Fadilah
Department Of Material System Engineering And Life Science Toyama University
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Miyashita Hisashi
Toyama National College Of Technology
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