Heat Transfer Characteristics of the Coil Heat Exchanger Using Helium according to the Shape and Mass Flow Rate Change

被引：0

作者：

Oh, Jeong Hwa ^{[1
]}

Shin, Min Kyu ^{[1
]}

Seung, A. Hyun ^{[1
]}

Kim, Sun Jin ^{[2
]}

Ko, Young Sung ^{[1
]}

机构：

[1] Chungnam Natl Univ, Dept Aerosp Engn, Daejeon, South Korea

[2] Chungnam State Univ, Dept Fire Safety Engn, Cheongyang, South Korea

来源：

TRANSACTIONS OF THE KOREAN SOCIETY OF MECHANICAL ENGINEERS B | 2021年 / 45卷 / 02期

关键词：

Coil Type Heat Exchanger; Helium; Heat Transfer; Curvature Ratio; Nusselt Number;

D O I：

10.3795/KSME-B.2021.45.2.073

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

In this study, the heat transfer characteristics of the coil heat exchanger using helium according to the shape and mass flow rate change were investigated. The high temperature was simulated using a water bath, and the experiment was performed by supplying room temperature helium as a fluid inside the coil. The experiments were carried out with varying Reynolds numbers (Re) for three cases with fixed coil diameter and different curvature. Consequently, the greater the curvature ratio, the better were the heat transfer characteristics. However, with an Re more than 50,000, the curvature effect was nearly not shown. In addition, as a result of using helium, Re < 40,000 did not show a significant difference from the theoretical formula, but when Re > 40,000, a higher heat transfer rate was verified.

引用

页码：73 / 82

页数：10

共 12 条

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