摘要
本文采用一维稳态饱和多孔介质能量双方程模型,对温室内多孔蓄热墙的传热与流动特性进行了研究.结果表明,多孔蓄热墙的固体骨架与空气之间的换热取决于空气的入口流速、多孔材料的孔隙率、渗透率和固体骨架的导热系数.由于多孔蓄热墙接受的太阳辐照是不均匀的,因此推荐采用具有不同孔隙率的新型复合多孔蓄热墙,以减少这种不利的影响.
Flow and heat transfer characteristics of porous heat- storage wall in greenhouse are studied using the one-dimensional steady energy two-equation model for saturated porous medium. Results show that the heat exchange between air and the solid matrix of porous heat-storage wall depends upon the inlet air velocity, the porosity and permeability of porous medium, the thermal conductivity of solid matrix. Because the incidence of solar radiation on the porous heat- storage wall is not uniform, the new composite porous solar wall with different porosity is proposed to reduce the disadvantageous effect.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2008年第2期284-286,共3页
Journal of Engineering Thermophysics
关键词
温室
多孔蓄热墙
流动与传热
greenhouse
porous heat- storage wall
flow and heat transfer
