钢砂与石英砂太阳能显热蓄能装置性能研究与优化  

STUDY ON MEDIUM TEMPERATURE OF QUARTZ SAND AND STEEL SHOT SENSIBLE SOLAR THERMAL STORAGE AND OPTIMIZATION

作　　者：陈宇[1] 代彦军[1] 林蒙[1] 谢文韬[1] 李显[1] 

机构地区：[1]上海交通大学机械与动力工程学院,上海200240

出　　处：《太阳能学报》2013年第5期825-830,共6页Acta Energiae Solaris Sinica

基　　金：国家自然科学基金(50876063);上海市科学技术委员会科技攻关项目(10dz1203402);"十一五"国家科技支撑计划(2008BAJ12B01)

摘　　要：为使槽式集热器能提供100—200℃的稳定热源，进而使太阳能与该温度区间的工业用热需求结合起来的关键因素之一是开发合适的蓄能部件。采用石英砂和钢砂的混合材料作为蓄能材料，结合蛇形盘管换热器设计加工2kWh的蓄能装置，并连接槽式集热器进行测试。以Ⅱ仃效率、热效率及集热效率为指标，建立相应模型得到：集热蓄能系统充放热效率为81．3％，炯效率为52．3％，材料导热系数≥2．0W／（m·℃）时，即可得到合适的换热器面积，蓄热体积与集热器面积之比在80L／m2时为最优值。In order to supply the steady energy for industrial heat whose working temperature is between 100-200℃ from solar energy, it is critical to develop suitable thermal storage. In this paper, a mixture material of quartz sand and steel shot was chosen and a 2kWh sensible thermal storage which is combined with serpentine heat exchangers was established. According to the thermal efficiency, exergy efficiency and collector efficiency, the results showed that the thermal efficiency of heat storage is about 81.3%, exergy efficiency is about 51.3%, The optimized ther- mal storage volume-to-parabolic trough collector area ration is 80L/m2 by coupled heat transfer model, and the desired heat transfer area could reduce a lot when the heat conductivity increases to 2. 0W/（ m. ℃ ）.

关 键 词：显热蓄热 槽式集热器 中温 炯效率 

分 类 号：TK512[动力工程及工程热物理—热能工程]