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research-article

Modeling and heat transfer of a high-temperature porous filled solar thermochemical reactor

[+] Author and Article Information
Ruming Pan

School of Energy Science and Engineering, Harbin Institute of Technology, Harbin, China
893338719@qq.com

Bachirou Guene Lougou

School of Energy Science and Engineering, Harbin Institute of Technology, Harbin, China
bachguelou@yahoo.fr

Yong Shuai

School of Energy Science and Engineering, Harbin Institute of Technology, Harbin, China
shuaiyong@hit.edu.cn

Guohua Zhang

School of Energy Science and Engineering, Harbin Institute of Technology, Harbin, China
791210571@qq.com

Hao Zhang

School of Energy Science and Engineering, Harbin Institute of Technology, Harbin, China
17B902038@stu.hit.edu.cn

1Corresponding author.

ASME doi:10.1115/1.4041707 History: Received March 29, 2018; Revised September 20, 2018

Abstract

In this paper, heat transfer modeling of a high-temperature porous-medium filled solar thermochemical reactor for hydrogen and synthesis gas production is investigated. The numerical simulation is performed using a 3D numerical model and surface-to-surface radiation model coupled to Rosseland approximation for radiation heat transfer. The effects of operating conditions and the porous structural parameters on the reactor thermal performance were investigated significantly. It was found that large axial temperature gradient and high-temperature distribution throughout the reactor were strongly dependent on the operating conditions. The inlet gas temperature has remarkable effects on the temperature distribution. The thermal performance of porous-medium filled solar thermochemical reactor could be improved by preheating the inlet gas up to 393.15 K. Moreover, a correlation was established between the protective gas inlet velocity and the porosity of porous media. The temperature difference decreased with the increase in the porosity of the inner cavity of the reactor. In contrast to the front and back part of the inner cavity of the reactor, higher temperature distribution could be obtained in the porous region by increasing the average cell diameters of porous media.

Copyright (c) 2018 by ASME
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