摘要
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 thermal storage is an important part for solar thermal power generation and high-temperature thermal utilization.This paper calculated the thermal storage process based on porous media and molten salt fluid,and tliermocline temperature distributions affected by thermal storage time,fluid inlet temperature and inlet velocity were analyzed.The results showed that the inlet temperature has little effect on the thickness of tliermocline and the increase of inlet velocity will lead to the thickness increase of tliermocline.While the temperature difference between fluid and porous medium was analyzed,the Re number criterion applied to non-local thermal equilibrium and local thermal equilibrium was obtained.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2012年第3期477-480,共4页
Journal of Engineering Thermophysics
基金
国家自然科学基金重点项目(No.50930007)
973计划项目(No.2010CB227306)
863计划项目(No.2009AA05Z218)
关键词
多孔介质
熔盐
热性能
斜温层厚度
porous media
molten salt
thermal performance
thermocline thickness
