Heat transfer enhancement in an air to water heat exchanger with discontinuous helical turbulators; experimental and numerical studies

被引：105

作者：

Sheikholeslami, M. ^{[1
]}

Ganji, D. D. ^{[1
]}

机构：

[1] Babol Univ Technol, Dept Mech Engn, Babol Sar, Iran

来源：

ENERGY | 2016年 / 116卷

关键词：

Hydrothermal analysis; Optimization; Helical fin; Heat exchanger; PRESSURE-DROP; FREE-CONVECTION; FLOW; NANOFLUID; PERFORMANCE; BAFFLES; SYSTEM;

D O I：

10.1016/j.energy.2016.09.120

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Influence of perforated and typical helical fin on hydrothermal treatment in a water to air heat exchanger is presented. Air and water move through outer and inner pipes, respectively. Effects of pitch ratio (A), Reynolds number (Re-a) and open area ratio (PR) are examined. Empirical formulae for thermal performance (eta), Darcy factor (f) and Nusselt number (Nu) are obtained. NSGA II and ANSYS FLUENT14 are chosen for optimization and numerical simulation. Results indicate that higher open area ratio offers greater thermal performance than the lower one. Temperature gradient attenuates with enhance of open area ratio. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：341 / 352

页数：12

共 33 条

[1] Heat capacity ratio and the best type of heat exchanger for geothermal water providing maximum heat transfer [J].

Agra, Ozden ;

Erdem, Hasan Huseyin ;

Demir, Hakan ;

Atayilmaz, S. Ozgur ;

Teke, Ismail .

ENERGY, 2015, 90 :1563-1568

[2] Heat transfers and pressure drops for porous-ring turbulators in a circular pipe [J].

Akansu, SO .

APPLIED ENERGY, 2006, 83 (03) :280-298

[3]

[Anonymous], 2006, Introduction to Heat Transfer

[4] A REVIEW OF AUGMENTATION TECHNIQUES FOR HEAT-TRANSFER SURFACES IN SINGLE-PHASE HEAT-EXCHANGERS [J].

BALARAS, CA .

ENERGY, 1990, 15 (10) :899-906

[5] Energy and exergy analyses of porous baffles inserted solar air heaters for building applications [J].

Bayrak, Fatih ;

Oztop, Hakan F. ;

Hepbasli, Arif .

ENERGY AND BUILDINGS, 2013, 57 :338-345

[6] Experimental investigation on performances of trisection helical baffled heat exchangers for oil/water-water heat transfer [J].

Chen, Ya-Ping ;

Wang, Wei-han ;

Wu, Jia-Feng ;

Dong, Cong .

ENERGY CONVERSION AND MANAGEMENT, 2015, 101 :460-469

[7] Microchannels enhanced by porous materials: Heat transfer enhancement or pressure drop increment? [J].

Dehghan, Maziar ;

Valipour, Mohammad Sadegh ;

Saedodin, Seyfolah .

ENERGY CONVERSION AND MANAGEMENT, 2016, 110 :22-32

[8] Investigation of heat transfer and pressure drop in a concentric heat exchanger with snail entrance [J].

Durmus, A ;

Esen, M .

APPLIED THERMAL ENGINEERING, 2002, 22 (03) :321-332

[9] A numerical study on thermo-hydraulic characteristics of turbulent flow in a circular tube fitted with conical strip inserts [J].

Fan, Aiwu ;

Deng, Junjie ;

Guo, Jian ;

Liu, Wei .

APPLIED THERMAL ENGINEERING, 2011, 31 (14-15) :2819-2828

[10] Experimental study of heat transfer enhancement with wire coil inserts in laminar-transition-turbulent regimes at different Prandtl numbers [J].

García, A ;

Vicente, PG ;

Viedma, A .

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 2005, 48 (21-22) :4640-4651

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