Thermodynamic analysis of lead-bismuth eutectic turbulent flow in a straight tube

被引：8

作者：

Guo, Jiangfeng ^{[1
]}

Huai, Xiulan ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Engn Thermophys, Beijing, Peoples R China

来源：

ENERGY | 2013年 / 57卷

基金：

中国国家自然科学基金;

关键词：

Lead-Bismuth eutectic (LBE); Entropy generation; Heat transfer; Turbulent flow; Turbulence Prandtl number; HEAT-TRANSFER; ENTROPY GENERATION; EXCHANGERS;

D O I：

10.1016/j.energy.2013.05.008

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The entropy generation in Lead-Bismuth Eutectic (LBE) turbulent flow in a cooled straight tube with a diameter of 10 mm and a length of 1 m is numerically investigated taking into account the temperature-dependent of LBE properties. The standard k-epsilon turbulence model combined with appropriate turbulence Prandtl number is adopted to describe the turbulent heat transfer and flow of LBE under different heat flux and flow conditions. The average cooling heat flux of 5 x 10(5) W/m(2), the flow inlet temperature of 723.15 K and the flow velocity of 1-3.5 m/s are used in these studies. The heat transfer entropy generation rate is far larger than frictional entropy generation rate, and the heat transfer entropy generation rate distributes more widely than frictional entropy generation over the flow cross-section. Under the same heat transfer area and heat load conditions, the thermodynamic performance of the LBE flow under considered conditions is the best under a slight increase of the absolute heat flux along flow direction condition, followed by the constant heat flux condition; the decreasing absolute heat flux along flow direction is the worst. (c) 2013 Elsevier Ltd. All rights reserved.

引用

页码：600 / 606

页数：7

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