高温蓄热是太阳能热发电、高温热利用中的重要组成部分。本文对基于多孔介质和熔融盐流体的高温蓄热过程进行了计算分析,对蓄热时间、流体进口温度、进口速度对斜温层温度分布的影响进行了分析。结果表明进口温度对斜温层厚度的影响较小,进口速度的增加会导致斜温层厚度的增加。同时对流体和多孔介质的温度差进行了分析,得到了应用于局部热平衡和非热平衡的雷诺数判据。 High-temperature heat storage is an important part of solar thermal power generation and high-temperature heat utilization. In this paper, the calculation and analysis of high temperature heat storage based on porous media and molten salt fluid are carried out. The effects of heat storage time, fluid inlet temperature and inlet velocity on the temperature distribution of the temperature gradient layer are analyzed. The results show that the influence of inlet temperature on the temperature of stratospheric temperature is small, and the increase of inlet velocity leads to the increase of stratospheric temperature. At the same time, the temperature difference between fluid and porous media was analyzed, and the Reynolds number criterion for local heat balance and non-heat balance was obtained.