Experiments on New Arrangements of Convex and Concave Corrugated Tubes through a Double-pipe Heat Exchanger

被引：27

作者：

Dizaji, Hamed Sadighi ^{[1
]}

Jafarmadar, Samad ^{[1
]}

机构：

[1] Urmia Univ, Dept Mech Engn, Orumiyeh 5756115311, Iran

来源：

EXPERIMENTAL HEAT TRANSFER | 2016年 / 29卷 / 05期

关键词：

corrugated tube; heat exchanger; heat transfer; friction factor; PRESSURE-DROP; TRANSFER COEFFICIENT; FRICTION FACTOR; ENHANCEMENT; NANOFLUID; R-134A; FLOW;

D O I：

10.1080/08916152.2015.1046015

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The main scope of this article paper is to experimentally clarify the effects of outer-tube and inner-tube corrugations on thermal and frictional characteristics in a horizontal double-pipe heat exchanger. Nusselt number, friction factor, and thermal performance factor are evaluated for new various arrangements of convex and concave corrugated tubes. Smooth tubes were corrugated by means of a special machine. Findings indicate that the arrangement type of corrugated tubes has a significant effect on the mentioned parameters. The best performance was obtained for a heat exchanger made of a concave corrugated outer tube and a convex corrugated inner tube.

引用

页码：577 / 592

页数：16

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