摘要
针对接触型和分隔型多孔介质太阳能集热组合墙系统,分析了太阳辐射及环境温度变化时,组合墙内传热与流动变化。多孔介质太阳能集热组合墙中,多孔介质起半透明隔热体和蓄热体的作用。多孔介质集热层的孔隙率、粒径、材料热导率和多孔介质集热层在组合墙中的位置对系统的采暖效果影响较大。
The heat transfer and flow in the solar composite wall with porous absorber were studied in the paper. The unsteady numerical simulation was employed to analyze the performance of the flow. and temperature field in the composite solar wall. The overplus heat was stored within the porous absorber during solar radiation and there was stratification in the porous layer and the porous absorber works as thermal insulator to some extent when no sunshine was available. The influence of particle size, porosity, thermal conductivity of porous absorber and its position in the solar composite wall on the heating room temperature is significant. The results show that all these factors should be taken into account for a better design of a heating system.
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2008年第2期220-226,共7页
Acta Energiae Solaris Sinica
基金
国家自然基金(50376015)
上海市教委科研项目
上海市重点专业建设项目
关键词
太阳能
采暖墙
多孔介质
传热与流动
solar energy
heating wall
porous medium
heat transfer and flow
