摘要
对含有相变微粒并且水平放置的流体层,在底部加热和周围绝热保温条件下的蓄热传热机理进行了理论分析研究,与无相变颗粒流体的蓄热过程进行了对比数值模拟。结果表明：对较薄的蓄热流体层,含相变微粒流体的蓄热完成时间短于无相变颗粒流体,随着液层厚度的增加这种差别减小。同时对液体层内不同高度下平均温度的分布和变化过程进行了分析研究。
The heat storage characteristics in a rectangular tank filled with phase-change-material（PCM） suspensions and heated from bottom were numerically simulated. A comparison analysis in heat transfer was performed for two types of fluids, which have the same variation in density with temperature, but a variable specific heat capacity for the PCM suspension and a constant for the other. Results show that more heat can be stored in a suspension with PCM than that without PCM. The completion time （99% heat stored） for heating storage is even shorter for the PCM suspensions in the case of relatively thin fluid layer and the heating plate temperature is in the phase change temperature range. There is no much difference in completion time for the two types of fluids with increasing heating temperature while the heating plate temperature is higher the phase change temperature.
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2006年第9期929-933,共5页
Acta Energiae Solaris Sinica
基金
国家自然科学基金项目(50576065)
教育部归国人员启动基金
关键词
相变流体
蓄热
自然对流
数值模拟
phase-change-material suspensions
heat storage
natural convection
numerical simulation
