高温熔盐储罐基础中陶粒的材料性能试验研究  

STUDY ON MATERIAL PROPERTIES OF CERAMSITE IN FOUNDATION OF HIGH TEMPERATURE MOLTEN SALT STORAGE TANK

作　　者：易自砚 李红星[1] 何邵华[1] 赵晴 Yi Ziyan;Li Hongxing;He Shaohua;Zhao Qing(Northwest Electric Power Design Institute Co.,Ltd.,of China Power Engineering Consulting Group,Xi’an 710075,China)

机构地区：[1]西北电力设计院有限公司,西安710075

出　　处：《太阳能学报》2024年第7期584-589,共6页Acta Energiae Solaris Sinica

摘　　要：高温熔盐储罐中储热介质温度约600℃,要求每天温降不超过1℃,为满足保温要求,储罐基础常以陶粒作为保温材料。通过对不同级配下5种典型陶粒的化学成分、材料特性和高温热工参数等进行试验研究,得到了陶粒的物理力学性能、相变温度、热膨胀系数和不同温度(20~600℃)下的导热系数等关键参数,揭示了陶粒的导热特性和变形机理。The temperature of the heat storage medium in the high-temperature molten salt storage tank is about 600℃,and the temperature drop is required to not exceed 1℃per day.In order to meet the thermal insulation requirements,the foundation of the storage tank is often made of ceramsite as the thermal insulation material.Through the experimental study of the chemical composition,material properties and high temperature thermal parameters of five typical ceramsite under different grades,the key parameters such as physical and mechanical properties,phase change temperature,linear expansion coefficient,and thermal conductivity at different temperatures(20-600℃)are obtained,and the thermal conductivity and deformation mechanism of ceramsite are revealed,which provide guidance for the design of ceramic particles in the foundation of high temperature heat storage tanks.

关 键 词：太阳能热发电站 热膨胀系数 导热系数 熔盐储罐基础 陶粒 相变温度 

分 类 号：TK512.4[动力工程及工程热物理—热能工程] TU551.1[建筑科学—建筑技术科学] TU541