Entropy generation analysis of fully developed turbulent convection in a twisted elliptical duct with constant heat flux

被引：1

作者：

Cheng, Junlin ^{[1
]}

Wang, Zizhao ^{[1
]}

Mao, Huiyi ^{[1
]}

机构：

[1] Jiangsu Univ Sci & Technol, Sch Energy & Power, Zhenjiang 212000, Peoples R China

来源：

INTERNATIONAL JOURNAL OF EXERGY | 2023年 / 41卷 / 02期

关键词：

entropy generation; exergy efficiency; turbulent flow; twisted elliptical duct; constant heat flux; geometry configuration; CIRCULAR TUBE; FLOW; NANOFLUID; RESISTANCE;

D O I：

10.1504/IJEX.2023.131483

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

In this study, the entropy generation and exergy efficiency of turbulent flow through a twisted elliptical tube were investigated. The effects of the fluid properties, the aspect ratio (1.05-10.00) and the twist pitch ratio (4-200) were considered. The results indicated that the total dimensionless entropy generation increased whereas the exergy efficiency decreased as the twist pitch ratio increased. Moreover, the total dimensionless entropy generation decreased, whereas the exergy efficiency increased with an increase in the aspect ratio. The minimum total dimensionless entropy generation of 0.01 is obtained with an aspect ratio of 10.00 and a twist pitch ratio of 16.36.

引用

页码：131 / 141

页数：12

共 20 条

[1] Entropy generation and exergy destruction for flow of a biologically functionalized graphene nanoplatelets nanofluid within tube enhanced with a novel rotary coaxial cross double-twisted tape [J].

Bahiraei, Mehdi ;

Mazaheri, Nima ;

Moayedi, Hossein .

INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER, 2020, 113

[2] STUDY OF ENTROPY GENERATION IN FUNDAMENTAL CONVECTIVE HEAT-TRANSFER [J].

BEJAN, A .

JOURNAL OF HEAT TRANSFER-TRANSACTIONS OF THE ASME, 1979, 101 (04) :718-725

[3] Entropy generation analysis of turbulent convection flow of Al2O3-water nanofluid in a circular tube subjected to constant wall heat flux [J].

Bianco, Vincenzo ;

Manca, Oronzio ;

Nardini, Sergio .

ENERGY CONVERSION AND MANAGEMENT, 2014, 77 :306-314

[4]

Cengel Y.A., 2015, HEAT MASS TRANSFER F, V5th

[5] Analysis of heat transfer and flow resistance of twisted oval tube in low Reynolds number flow [J].

Cheng, Junlin ;

Qian, Zuoqin ;

Wang, Qiang .

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 2017, 109 :761-777

[6] A comprehensive second law analysis for a heat exchanger tube equipped with the rod inserted straight and twisted tape and using water/CuO nanofluid [J].

Dagdevir, Toygun ;

Ozceyhan, Veysel .

INTERNATIONAL JOURNAL OF THERMAL SCIENCES, 2022, 181

[7] CFD modeling of heat transfer performance of MgO-water nanofluid under turbulent flow [J].

Davarnejad, Reza ;

Jamshidzadeh, Maryam .

ENGINEERING SCIENCE AND TECHNOLOGY-AN INTERNATIONAL JOURNAL-JESTECH, 2015, 18 (04) :536-542

[8] An approach to stability analysis and entropy generation minimization in the single-phase natural circulation loops [J].

Goudarzi, N. ;

Talebi, S. .

ENERGY, 2015, 80 :213-226

[9] Heat transfer and entropy generation analysis of HFE 7000 based nanorefrigerants [J].

Helvaci, H. U. ;

Khan, Z. A. .

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 2017, 104 :318-327

[10] Numerical investigation of turbulent entropy production rate in conical tubes fitted with a twisted-tape insert [J].

Kaood, Amr ;

Fadodun, Olatomide G. .

INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER, 2022, 139

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