分层式蓄热室蓄热过程数值仿真与优化

doi:10.12028/j.issn.2095-4239.2018.0058

储能科学与技术 ›› 2018, Vol. 7 ›› Issue (4): 718-725.doi: 10.12028/j.issn.2095-4239.2018.0058

分层式蓄热室蓄热过程数值仿真与优化

胡德胜¹, 曾祺²

1. 中南大学资产经营有限公司, 湖南长沙 410083;
2. 中南大学能源科学与工程学院, 湖南长沙 410083

收稿日期:2018-04-11 修回日期:2018-06-10 出版日期:2018-07-01 发布日期:2018-06-19
通讯作者: 曾祺,男,硕士研究生,研究方向为热能工程,E-mail:1542790825@qq.com
作者简介:胡德胜(1971-),男,硕士,研究方向为热工设备仿真E-mail:hdsf38@163.com

Numerical simulation and optimization of a heat storage process in a layered regenerator

HU Desheng¹, ZENG Qi²

1. Central South University Asset Management Co., Ltd., Changsha 410083, Hunan, China;
2. College of Energy Science and Engineering, Central South University, Changsha 410083, Hunan, China

Received:2018-04-11 Revised:2018-06-10 Online:2018-07-01 Published:2018-06-19

摘要/Abstract

摘要： 以降低熔铝炉蓄热室压损和提高蓄热室蓄热效率为目标，对某铝厂熔铝炉蓄热室进行了分层布料仿真研究。以多孔介质模型为基础，对动量方程源项进行了修正，将多孔介质结构内的传热转化为两相间的传热，并采用双能量方程形式建立多孔介质和流体间的传热能量方程。利用计算流体力学软件Fluent及其二次开发平台，建立了适用于蓄热室蓄热过程的数学模型。利用建立的数学模型对影响分层布料蓄热室蓄热过程的4个主要参数进行了模拟计算，得到了各参数对分层布料蓄热室的蓄热效率和压损的影响规律，并通过正交试验直观分析和方差分析的方法对各参数进行了显著性分析，且得到了保证蓄热效率和降低压损为目标的最优搭配方案。其中热效率最优搭配方案为入口质量流量1.65 kg/s、粒径组合26 mm-18 mm-26 mm、上中下层高比为2：1：2；压损最优搭配方案为入口质量流量1.65 kg/s、粒径组合32 mm-24 mm-32 mm、上中下层高比为2：1：2。

关键词: 熔铝炉, 蓄热室, 多孔介质, 数值模拟, 正交试验

Abstract: This numerical study aims to reduce pressure loss and improve thermal efficiency of a regenerator of an aluminum smelting furnace. A porous medium based model with a modified source item of the momentum equation, coupled with energy equations for both gas and solid phases, which upon using suitable, was established for modelling the regenerative process in Fluent environment. The mathematical model was used to investigate the effects of 4 main parameters on the thermal storage process, storage efficiency and pressure loss of the stratified regenerator. The results were analyzed by using the orthogonal experiments and variance analysis, and the collocation scheme for an optimal regenerative efficiency and pressure loss minimization. It was found that an optimal regenerative efficiency occurs with an entrance mass flow of 1.65 kg·s^-1, a particle size combination of 26 mm-18 mm-26 mm, whereas the optimal pressure drop takes place with an entrance mass flow of 1.65 kg·s^-1, a particle size combination of 32 mm-24 mm-32 mm, and the upper middle and lower layer high ratio at 2:1:2.

Key words: aluminum smelting furnace, regenerator, porous medium, simulation, orthogonal test

中图分类号:

TK02

胡德胜, 曾祺. 分层式蓄热室蓄热过程数值仿真与优化[J]. 储能科学与技术, 2018, 7(4): 718-725.

HU Desheng, ZENG Qi. Numerical simulation and optimization of a heat storage process in a layered regenerator[J]. Energy Storage Science and Technology, 2018, 7(4): 718-725.

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分层式蓄热室蓄热过程数值仿真与优化

Numerical simulation and optimization of a heat storage process in a layered regenerator

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