Thermal efficiency maximization for H- and X-shaped heat exchangers based on constructal theory

被引：42

作者：

Chen, Lingen ^{[1
,2
,3
]}

Feng, Huijun ^{[1
,2
,3
]}

Xie, Zhihui ^{[1
,2
,3
]}

Sun, Fengrui ^{[1
,2
,3
]}

机构：

[1] Naval Univ Engn, Inst Thermal Sci & Power Engn, Wuhan 430033, Peoples R China

[2] Naval Univ Engn, Mil Key Lab Naval Ship Power Engn, Wuhan 430033, Peoples R China

[3] Naval Univ Engn, Coll Power Engn, Wuhan 430033, Peoples R China

来源：

APPLIED THERMAL ENGINEERING | 2015年 / 91卷

基金：

中国国家自然科学基金;

关键词：

Constructal theory; Maximum thermal efficiency; H-shaped heat exchanger; X-shaped heat exchanger; Generalized thermodynamic optimization; ENTROPY GENERATION MINIMIZATION; OPTIMIZATION; DESIGN; NETWORKS; SYSTEMS;

D O I：

10.1016/j.applthermaleng.2015.08.029

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Constructal optimizations of H- and X-shaped heat exchangers are carried out by taking the maximum thermal efficiency (the ratio of the dimensionless heat transfer rate to the dimensionless total pumping power) as optimization objective. The constraints of total tube volumes and spaces occupied by heat exchangers are considered in the optimizations. For the H-shaped heat exchanger, the thermal efficiency decreases when the dimensionless mass flow rate increases. For the higher order of the X-shaped heat exchanger, when the order number is 3, the thermal efficiency of the heat exchanger with Murry law is increased by 68.54% than that with equal flow velocity in the tubes, and by 435.46% than that with equal cross section area of the tubes. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：456 / 462

页数：7

共 37 条

[1] Multi-Objective Optimization of a Cross-Flow Plate Heat Exchanger Using Entropy Generation Minimization [J].