Comparative evaluation of flow boiling heat transfer characteristics of R-1234ze(E) and R-134a in plate heat exchangers with different Chevron angles

被引：47

作者：

Kim, Dongwoo ^{[1
]}

Lee, DongChan ^{[1
]}

Jang, Dong Soo ^{[1
]}

Jeon, Yongseok ^{[1
]}

Kim, Yongchan ^{[1
]}

机构：

[1] Korea Univ, Dept Mech Engn, Seoul 136713, South Korea

来源：

APPLIED THERMAL ENGINEERING | 2018年 / 132卷

关键词：

R-1234ze(E); Low GWP; Heat transfer coefficient; Pressure drop; Plate heat exchanger; PRESSURE-DROP; CONDENSATION; EVAPORATION; R134A; R1234ZE(E); COEFFICIENTS; REFRIGERANTS; MINICHANNEL; TUBES;

D O I：

10.1016/j.applthermaleng.2018.01.019

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

In this study, the flow boiling heat transfer characteristics of R-1234ze(E) and R-134a in plate heat exchangers with different Chevron angles are measured and analyzed as a function of the mass flux, saturation temperature, vapor quality, and heat flux. The effect of the mass flux on the heat transfer and pressure drop of R-1234ze(E) is substantial. The heat transfer coefficient of R-1234ze(E) for a Chevron angle of 60 is approximately 3.7 times higher than that for a Chevron angle of 30 at high vapor qualities owing to the intensified turbulent flow. Moreover, for a Chevron angle of 60, the average heat transfer coefficient of R-1234ze(E) is on average 4.7% higher than that of R-134a due to its higher equivalent Reynolds number. However, the average pressure drop of R-1234ze(E) is higher than that of R-134a owing to the lower vapor density of R-1234ze(E). Finally, the correlations for the heat transfer and pressure drop of R-1234ze(E) are developed in the plate heat exchangers with different Chevron angles. (C) 2018 Elsevier Ltd. All rights reserved.

引用

页码：719 / 729

页数：11

共 32 条

[1] Flow boiling and frictional pressure gradients in plate heat exchangers. Part 2: Comparison of literature methods to database and new prediction methods [J].

Amalfi, Raffaele L. ;

Vakili-Farahani, Farzad ;

Thome, John R. .

INTERNATIONAL JOURNAL OF REFRIGERATION-REVUE INTERNATIONALE DU FROID, 2016, 61 :185-203

[2] Flow boiling and frictional pressure gradients in plate heat exchangers. Part 1: Review and experimental database [J].

Amalfi, Raffaele L. ;

Vakili-Farahani, Farzad ;

Thome, John R. .

INTERNATIONAL JOURNAL OF REFRIGERATION-REVUE INTERNATIONALE DU FROID, 2016, 61 :166-184

[3]

[Anonymous], 2014, ENG ANAL EXPT DATA

[4] Plate heat exchanger literature survey and new heat transfer and pressure drop correlations for refrigerant evaporators [J].

Ayub, ZH .

HEAT TRANSFER ENGINEERING, 2003, 24 (05) :3-16

[5] Condensation heat transfer and two-phase frictional pressure drop in a single minichannel with R1234ze(E) and other refrigerants [J].

Del Col, Davide ;

Bortolato, Matteo ;

Azzolin, Marco ;

Bortolin, Stefano .

INTERNATIONAL JOURNAL OF REFRIGERATION, 2015, 50 :87-103

[6] Flow boiling of R134a and ammonia in a plate heat exchanger [J].

Djordjevic, E. ;

Kabelac, S. .

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 2008, 51 (25-26) :6235-6242

[7]

Eldeeb R., 2015, INT J REFRIG, V65, P12

[8] A general review of the Wilson plot method and its modifications to determine convection coefficients in heat exchange devices [J].

Fernandez-Seara, Jose ;

Uhia, Francisco J. ;

Sieres, Jaime ;

Campo, Antonio .

APPLIED THERMAL ENGINEERING, 2007, 27 (17-18) :2745-2757

[9] Flow pattern map, heat transfer and pressure drops during evaporation of R-1234ze(E) and R134a in a horizontal, circular smooth tube: Experiments and assessment of predictive methods [J].

Grauso, S. ;

Mastrullo, R. ;

Mauro, A. W. ;

Thome, J. R. ;

Vanoli, G. P. .

INTERNATIONAL JOURNAL OF REFRIGERATION-REVUE INTERNATIONALE DU FROID, 2013, 36 (02) :478-491

[10] Experiments on the characteristics of evaporation of R410A in brazed plate heat exchangers with different geometric configurations [J].

Han, DH ;

Lee, KJ ;

Kim, YH .

APPLIED THERMAL ENGINEERING, 2003, 23 (10) :1209-1225

← 1 2 3 4 →