热平衡法在S-CO2管内流动换热实验中的应用与改进
Application and Improvement of the Heat Balance Method in Flow and Heat Transfer Experiments within S-CO2 Flow Channels
张帮辉 1高明 1任燕 1杨其国1
作者信息
- 1. 上海理工大学 能源与动力工程学院,上海 200093
- 折叠
摘要
为了解决S-CO2 水平管内流动换热实验中由于管道周向温度分布不均匀而导致的内壁温计算误差问题,将原有的热平衡法进行了改进,基于体积发热率法计算内热源项,并对底层节点温度进行再计算.结果表明:改进的热平衡法扩展了原有热平衡法的适用范围,使之能够应用于水平管交流电加热情况,计算得到的内壁面温度更接近精确值.
Abstract
In order to solve the problem of calculation errors in the inner wall temperature due to uneven circumferential temperature distribution in S-CO2 horizontal tube during flow and heat transfer experi-ments,the original thermal balance method has been improved.The internal heat source term is calculat-ed based on the volumetric heating rate method,and the temperature of the bottom node is recalculated.The results show that the improved thermal balance method extends the applicability of the original ther-mal balance method,allowing it to be applied to AC electric heating in horizontal tubes.The calculated inner wall temperature is closer to the accurate value.
关键词
超临界二氧化碳/实验/换热/热平衡法Key words
supercritical carbon dioxide/experiment/heat transfer/thermal balance method引用本文复制引用
出版年
2024
NETL
NSTL
万方数据