Second law analysis and heat transfer in a cross-flow heat exchanger with a new winglet-type vortex generator

被引：61

作者：

Kotcioglu, Isak ^{[2
]}

Caliskan, Sinan ^{[1
]}

Cansiz, Ahmet ^{[3
]}

Baskaya, Senol ^{[4
]}

机构：

[1] Univ Hitit, Dept Mech Engn, Fac Engn, TR-19030 Corum, Turkey

[2] Ataturk Univ, Dept Mech Engn, Fac Engn, TR-25240 Erzurum, Turkey

[3] Ataturk Univ, Dept Elect Elect Engn, Fac Engn, TR-25240 Erzurum, Turkey

[4] Gazi Univ, Dept Mech Engn, Fac Engn & Architecture, TR-06570 Ankara, Turkey

来源：

ENERGY | 2010年 / 35卷 / 09期

关键词：

Vortex generators; Cross-flow heat exchanger; epsilon-NTLU; Entropy generation; ENTROPY GENERATION; THERMODYNAMIC OPTIMIZATION; MASS-TRANSFER; PERFORMANCE;

D O I：

10.1016/j.energy.2010.05.014

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

In this paper a second law analysis of a cross-flow heat exchanger (HX) is studied in the presence of a balance between the entropy generation due to heat transfer and fluid friction. The entropy generation in a cross-flow HX with a new winglet-type convergent divergent longitudinal vortex generator (CDLVG) is investigated. Optimization of HX channel geometry and effect of design parameters regarding the overall system performance are presented. For the HX flow lengths and CDLVGs the optimization model was developed on the basis of the entropy generation minimization (EGM). It was found that increasing the cross-flow fluid velocity enhances the heat transfer rate and reduces the heat transfer irreversibility. The test results demonstrate that the CDLVGs are potential candidate procedure to improve the disorderly mixing in channel flows of the cross-flow type HX for large values of the Reynolds number. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：3686 / 3695

页数：10

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