Effectiveness-thermal resistance method for heat exchanger design and analysis

被引：234

作者：

Guo, Z. Y. ^{[1
]}

Liu, X. B. ^{[1
]}

Tao, W. Q. ^{[2
]}

Shah, R. K. ^{[3
]}

机构：

[1] Tsinghua Univ, Dept Mech, Beijing 100084, Peoples R China

[2] Xi An Jiao Tong Univ, Sch Power Energy Engn, Xian 710049, Shaanxi, Peoples R China

[3] Indian Inst Technol, Dept Energy Sci & Engn, Bombay 400076, Maharashtra, India

来源：

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER | 2010年 / 53卷 / 13-14期

关键词：

Heat exchanger; Thermal resistance; Entransy dissipation; Entropy generation; ENTRANSY;

D O I：

10.1016/j.ijheatmasstransfer.2010.02.008

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The equivalent thermal resistance of a heat exchanger is defined based on the concept of the entransy dissipation rate, which measures the irreversibility of heat transfer for the purpose of object heating or cooling, rather than from the heat to work conversion. The relationships between the heat exchanger effectiveness and the thermal resistance (or conductance) are developed, which do not depend on its flow arrangement, and hence useful for the performance comparison among heat exchangers with different flow arrangements. In addition, such relationships bridge a gap between the heat exchanger irreversibility and its effectiveness. The monotonic decrease of the effectiveness with increasing the thermal resistance shows that the heat exchanger irreversibility can be described by its thermal resistance when evaluated from the transport process viewpoint, while the so-called entropy generation paradox occurs, if the irreversibility is measured by the entropy generation number for a heat exchanger. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：2877 / 2884

页数：8

共 20 条

[1]

[Anonymous], 1996, ENTROPY GENERATION M

[2]

Bejan A., 1977, Transactions of the ASME. Series C, Journal of Heat Transfer, V99, P374, DOI 10.1115/1.3450705

[3]

BEJAN A, 1980, ENERGY, V5, P721, DOI 10.1016/0360-5442(80)90091-2

[4]

Bowman R.A., 1940, Transactions of the ASME, V62, P283

[5] Constructal entransy dissipation minimization for 'volume-point' heat conduction [J].

Chen, Lingen ;

Wei, Shuhuan ;

Sun, Fengrui .

JOURNAL OF PHYSICS D-APPLIED PHYSICS, 2008, 41 (19)

[6] Generalized thermal resistance for convective heat transfer and its relation to entransy dissipation [J].

Chen Qun ;

Ren JianXun .

CHINESE SCIENCE BULLETIN, 2008, 53 (23) :3753-3761

[7] Entransy - A physical quantity describing heat transfer ability [J].

Guo, Zeng-Yuan ;

Zhu, Hong-Ye ;

Liang, Xin-Gang .

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 2007, 50 (13-14) :2545-2556

[8] Rationalisation of second law analysis of heat exchangers [J].

Hesselgreaves, JE .

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 2000, 43 (22) :4189-4204

[9]

Holman J.P., 2002, Heat transfer

[10]

Incropera F. P., 1996, Fundamentals of heat and mass transfer

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