多孔介质太阳能热化学反应器传热特性模拟  

Simulation of Heat Transfer Characteristics of Porous Media Solar Thermochemical Reactor

作　　者：刘朋 谢坤 孙嘉明 陈海军[1] LIU Peng;XIE Kun;SUN Jia-ming;CHEN Haijun(College of Mechanical and Power Engineering,Nanjing Tech University,Nanjing Jiangsu 211816,China;College of Energy Science and Engineering,Nanjing Tech University,Nanjing Jiangsu 211816,China)

机构地区：[1]南京工业大学机械与动力工程学院,江苏南京211816 [2]南京工业大学能源科学与工程学院,江苏南京211816

出　　处：《当代化工》2023年第4期775-780,800,共7页Contemporary Chemical Industry

基　　金：国家自然科学基金面上项目,高汇聚光-热协同甲烷重整体系构建及机理研究(项目编号:51676096)。

摘　　要：利用FLUENT软件并结合用户自定义函数,采用不同的热物理模型,研究了多孔介质太阳能热化学反应器内部的传热和流体流动特性。结果表明:随着入口流速从0.005m·s^(-1)增加到0.1m·s^(-1),局部热非平衡模型和局部热平衡模型之间的平均温度偏差增加了6.55倍,局部热非平衡模型可以保证在高温条件下的仿真精度。对于高温环境下的数值模拟必须考虑辐射传输模型。多孔介质在提供大比表面积和提高反应介质中温度和速度分布的均匀性方面具有积极作用。The heat transfer and fluid flow characteristics in porous media solar thermochemical reactor were studied by using Fluent software and different thermophysical models combined with user-defined functions.The results showed that as the inlet velocity increased from 0.005 m·s^(-1)to 0.1 m·s^(-1),the average temperature deviation between the local thermal non-equilibrium model and the local thermal equilibrium model increased by 6.55 times.The local thermal non-equilibrium model can ensure the simulation accuracy under high temperature conditions.The radiative transfer model must be considered in the numerical simulation of high temperature environment.The porous media had positive effects on providing large specific surface areas and increasing the uniformity of temperature and velocity distribution in the reacting medium.

关 键 词：太阳能热化学 多孔介质 用户自定义函数 局部热非平衡模型 

分 类 号：TK519[动力工程及工程热物理—热能工程]