摘要
比较了太阳能集热器分别以空气和水为热储能媒介时对卵石层的储热特性. (1)利用由直径为47mm,长度为1500mm的28根真空管组成的太阳能集热器和直径为50～100mm的卵石,设计了热循环储热系统,在宽4m、长2.7m、高2.6m的房间内的供热量为10.8 m2.(2)对不同热储能媒介的热储量进行了测试,结果表明以空气作为媒介时,卵石层中热储能为55MJ·d-1,以水为媒介时热储能为49MJ·d-1.(3) 以水为媒介时卵石层的温度变化相对以空气为媒介时的温度变化较小,并且稳定.
The thermal characteristics of gravel layer in internal heat circulation medium in solar collectors were compared. （ 1 ） Solar collectors （heat collection element） , with 28 vacuum tubes of 1500mm long and 47mm diameter, and gravel layer （heat storage element） with gravel diameters of 50mm - 100mm were designed and made for heating load of 10. 8m^2 （ wide of 4 m by length of 2.7m, height of 2. 6m）. （2） Temperature of each system element was measured. Stored heat in gravel layer was 55 MJ·d^-1 and 49MJ·d ^-1 respectively when heat circulation media were air and water. （ 3 ） The temperature change of gravel layer with hot water circulation was small and more stable than that with hot air circulation.
出处
《沈阳农业大学学报》
CAS
CSCD
北大核心
2005年第6期699-704,共6页
Journal of Shenyang Agricultural University
关键词
太阳能集热器
卵石层
储热
放热
热循环媒介
solar collector
gravel layer
heat storage
heat radiation
heat circulation medium
