Abstract: In this paper, based on the background of hydrogen photolysis of water, adapts the computational fluid dynamics software combined with secondary development to numerically analyze the heat transfer process inside the solar photocatalytic reactor. A high⁃quality structured hexahedral photocatalytic reactor grid was established to analyze the temperature distribution characteristics of the solar photocatalytic reactor model numerically, compile the Gaussian heat flow and validate the model combined with the solar photocatalytic water activity evaluation system for hydrogen production. This article will focus on the effect of solar radiation on the temperature distribution of the fluid inside the reactor and the reactor under full spectrum, and study the differences in temperature distribution and causes under different conditions.

Key words: Solar energy, Photocatalytic, Temperature distribution, Hydrogen production by hydrolysis, The Gaussian heat flow

摘要： 以太阳能光解水制氢为背景，采用计算流体力学软件结合二次开发，对太阳能光催化反应器内部的传热过程进行了数值分析。建立了高质量的结构化六面体光催化反应器网格，对太阳能光催化反应器模型的温度分布特性进行数值分析研究，编辑高斯热流，并结合太阳能光催化分解水制氢活性评价系统实验台进行模型验证。重点研究在全光谱作用下太阳辐射对于反应器以及反应器内部流体温度分布的影响，研究在不同工况下温度分布差异以及原因。

关键词: 太阳能, 　光催化, 　温度场分布, 　水解制氢, 　高斯热流