用稳态平板法测定储热材料导热系数的实验研究  

Experimental Study of Mensurate the Thermal Conductivity of Heat Storage Material by Steady-state Method

作　　者：茅靳丰[1] 黄玉荣[1] 李金田[1] 刁孝发 李伟华[1] 马晓光[1] 

机构地区：[1]解放军理工大学工程兵工程学院,南京210007

出　　处：《制冷与空调（四川）》2010年第5期26-29,共4页Refrigeration and Air Conditioning

摘　　要：为了改善无机水合盐三水醋酸钠储热材料的导热系数,可以加入一定量的高导热系数的膨胀石墨。采用稳态平板法测定了含不同体积分率膨胀石墨的复合相变储能材料的导热系数,经过比较分析,储热材料加入膨胀石墨后,导热系数明显改善,10%体积分率的膨胀石墨能将以三水醋酸钠为储热基质的储热材料的导热系数提高一倍;固态储热材料的导热系数随温度上升,变化幅度不大,在实际贮能工程计算中可作常数处理。In order to improve the thermal conductivity of sodium acetate trihydrate,a certain amount of high thermal conductivity graphite can be added.Steady-state plate method was used to mensurate the thermal conductivity of composite phase change materials which contains expanded graphite of different volume fraction.After a comparative analysis,the thermal conductivity of heat storage material was improved significantly when adding expanded graphite.And it＇s thermal conductivity will be nearly double when adding 10% volume fraction of expanded graphite.The thermal conductivity of solid heat storage material with changed slightly when temperature rise.It can be treated as a constant in the actual calculation of energy storage projects.

关 键 词：稳态平板法 导热系数 三水醋酸钠 膨胀石墨 

分 类 号：TK121[动力工程及工程热物理—工程热物理] TB612[动力工程及工程热物理—热能工程]