Experimental study on the heat transfer and flow characteristics of nanorefrigerants inside a corrugated tube

被引：47

作者：

Yang, Di ^{[1
]}

Sun, Bin ^{[1
]}

Li, Hongwei ^{[1
]}

Fan, Xiaochao ^{[2
]}

机构：

[1] Northeast Dianli Univ, Sch Energy & Power Engn, Chuanying 132012, Jilin, Peoples R China

[2] Xinjiang Univ, Coll Elect Engn, Urumqi 830000, Peoples R China

来源：

INTERNATIONAL JOURNAL OF REFRIGERATION | 2015年 / 56卷

基金：

中国国家自然科学基金;

关键词：

Heat transfer; Flow characteristics; Nanorefrigerant; Entropy generation; Corrugated tube; THERMAL-CONDUCTIVITY ENHANCEMENT; ENTROPY GENERATION MINIMIZATION; THERMOPHYSICAL PROPERTIES; PARTICLE CONCENTRATION; NANOFLUIDS; POOL; VISCOSITY; REFRIGERANT; PERFORMANCE; ABSORPTION;

D O I：

10.1016/j.ijrefrig.2015.04.011

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The heat transfer and flow characteristics of MWCNT-R141b nanorefrigerant with different mass fractions have been studied through experiments. Experimental results were compared with existing correlations. A two-step method was used to prepare the nanorefrigerants. Span-80 was used as surfactant with an average particle diameter of 20 nm. Transmittance method was used to evaluate the stability of nanorefrigerants. Results showed that the stability of MWCNT-R141b nanorefrigerant, which is the added dispersant, was good during the experiments. The 0.3 wt% MWCNT-R141b nanorefrigerants had optimal heat transfer enhancement effects compared with pure refrigerants. The maximum Nusselt number increased by 40%. The specific pressure drop of nanorefrigerant increased as the Reynolds number (Re) increased, and the specific pressure drop of the pure refrigerant was minimum, which is similar to R141b. (C) 2015 Elsevier Ltd and IIR. All rights reserved.

引用

页码：213 / 223

页数：11

共 42 条

[1] Influence of particle concentration and temperature on the thermophysical properties of CuO/R134a nanorefrigerant [J].

Alawi, Omer A. ;

Sidik, Nor Azwadi Che .

INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER, 2014, 58 :79-84

[2] Mathematical correlations on factors affecting the thermal conductivity and dynamic viscosity of nanorefrigerants [J].

Alawi, Omer A. ;

Sidik, Nor Azwadi Che .

INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER, 2014, 58 :125-131

[3]

[Anonymous], PRINCIPLES CHEM ENG

[4] Entropy generation minimization: The new thermodynamics of finite-size devices and finite-time processes [J].

Bejan, A .

JOURNAL OF APPLIED PHYSICS, 1996, 79 (03) :1191-1218

[5] Performance of a domestic refrigerator using TiO2-R600a nano-refrigerant as working fluid [J].

Bi, Shengshan ;

Guo, Kai ;

Liu, Zhigang ;

Wu, Jiangtao .

ENERGY CONVERSION AND MANAGEMENT, 2011, 52 (01) :733-737

[6] THE VISCOSITY OF CONCENTRATED SUSPENSIONS AND SOLUTIONS [J].

BRINKMAN, HC .

JOURNAL OF CHEMICAL PHYSICS, 1952, 20 (04) :571-571

[7] Silicon oil based multiwalled carbon nanotubes nanofluid with optimized thermal conductivity enhancement [J].

Chen, Lifei ;

Xie, Huaqing .

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS, 2009, 352 (1-3) :136-140

[8] Experimental study on thermal performances of heat pipes for air-conditioning systems influenced by magnetic nanofluids, external fields, and micro wicks [J].

Chiang, Yuan-Ching ;

Kuo, Wen-Cheng ;

Ho, Chia-Che ;

Chieh, Jen-Jie .

INTERNATIONAL JOURNAL OF REFRIGERATION-REVUE INTERNATIONALE DU FROID, 2014, 43 :62-70

[9]

Choi S.U.S., 1995, DEV APPL NONNEWTONIA, V66

[10] Pool boiling heat transfer characteristics of ZrO2-water nanofluids from a flat surface in a pool [J].

Chopkar, Manoj ;

Das, A. K. ;

Manna, I. ;

Das, P. K. .

HEAT AND MASS TRANSFER, 2008, 44 (08) :999-1004

← 1 2 3 4 5 →