太阳能甲醇重整制氢过程催化剂颗粒床特性及综合性能数值分析  

Numerical Analysis of Catalyst Particle Bed Characteristics and Comprehensive Performance for Solar-driven Hydrogen Production via Methanol-Steam Reforming Reaction

作　　者：卫元珂 高哲 程泽东 张俊东 何雅玲 WEI Yuanke;GAO Zhe;CHENG Zedong;ZHANG Jundong;HE Yaling(Key Laboratory of Thermo-Fluid Science and Engineering of Ministry of Education,School of Energy and Power Engineering,Xi’an Jiaotong University,Xi’an,Shaanxi 710049,China)

机构地区：[1]西安交通大学能源与动力工程学院,热流科学与工程教育部重点实验室,西安710049

出　　处：《工程热物理学报》2023年第3期795-802,共8页Journal of Engineering Thermophysics

基　　金：国家自然科学基金面上项目(No.51976158);陕西省自然科学基础研究计划项目(No.2019JQ-186)。

摘　　要：针对太阳能甲醇重整制氢系统的数值研究,以往受限于网格划分和计算资源,多采用假设均匀的多孔介质模型,但难以准确描述微观结构下的多组分热-质传输和化学反应过程。本文结合催化剂颗粒床模型和多孔介质模型各自优势,建立了基于实际催化剂颗粒床孔隙率分布的太阳能甲醇重整制氢系统三维综合数值模型,并将计算结果与传统模型进行对比,发现孔隙率分布对系统性能有着较大的影响,而本文所建的基于实际孔隙率分布的模型更接近于系统真实情况。基于此,本文进一步考察了催化剂颗粒尺寸和运行参数对整个系统流动传热和化学反应综合性能的影响规律。The porous media model with uniform porosity assumption has been usually adopted in the numerical studies of solar-driven methanol-steam reforming hydrogen production systems,due to the limitation of mesh generation and computational cost.But it’s difficult to accurately simulate the multicomponent heat-mass transport and chemical reaction processes.In this paper,the advantages of both the particle-resolved model and the porous media model were combined to develop a comprehensive numerical model for the parabolic trough solar receiver-reactor based on the relatively actual porosity distribution of the catalyst particle packed bed.The simulation result of the proposed model was compared with that of the traditional porous media model with the uniform porosity.It is found that the porosity distribution has a great impact on the system performance,and the proposed model with the relatively actual porosity distribution can better simulate the actual operation.Based on these,the effect of the catalyst particle size and operating parameters on the comprehensive performance of the parabolic trough solar receiver-reactor was further investigated.

关 键 词：太阳能集热器 甲醇重整制氢 颗粒堆积床 孔隙率分布 数值模拟 

分 类 号：TK124[动力工程及工程热物理—工程热物理]