摘要
设计两种储热结构单元,采用ansys动态模拟方法模拟了在储热过程中储热单元温度最低点温度与时间的关系。研究发现:热导率越大储热速度越快,把钢管由平行排列改为三角错排,储热单元截面则由正方形变为正六边形,面积保持不变,传热性能有所提高;在混凝土中加入5%石墨片强化传热,等效热导率提高了4.7倍,与加5%石墨粉的混凝土相比,等效热导率提高了一倍。
Designed two heat store unit,used ansys dynamic method to simulate the temperature change at the point of the lowest temperature of the heat store unit,found that with the heat conductivity of the material became higher,the speed of the heat store improved.The arrangement of the steel tube changed from parallel to triangle,so the section of the heat store unit changed from square to hexagon and keeps the area unchanged,the performance of the heat store improved a little.5% graphite piece added to the concrete at some position of the store unit,from the simulate result it can be seen that the thermal conductivity of the heat store improve 4.7 times,and doubled by compare to the concrete added 5% graphite powder.
出处
《节能》
2009年第1期13-15,共3页
Energy Conservation
基金
国家高技术研究发展计划(项目编号:2007AA05Z459)
关键词
储热混凝土
热导率
模拟
thermal storage concrete
thermal conductivity
stimulation
