高原地区太阳能热风采暖系统中岩石床的性能研究  

Performance of Rock Bed for Solar Hot Air Heating System in the Plateau Area

作　　者：付博亨 庄春龙[1] 席新宇[1] 王楠[1] 

机构地区：[1]中国人民解放军后勤工程学院国防建筑规划与环境工程系,重庆401311

出　　处：《建筑节能》2017年第3期57-61,共5页BUILDING ENERGY EFFICIENCY

摘　　要：鉴于高原地区自然环境特点,以太阳能热风采暖系统中岩石床为研究对象,建立岩石床的数学模型。从蓄热特性和阻力压降2个方面,模拟分析岩石容积比热容、空气入口温度以及不同海拔高度下空气密度对岩石床性能的影响。结果表明:在一定条件下,海拔每升高1 000 m,空气密度减小约10%,岩石床的平均蓄热功率降低约5%,阻力压降下降约10%,为达到设计的蓄热要求,应增加风机的风量和风压;空气入口温度越低,岩石床阻力压降越大;考虑到蓄热量与热扩散系数两方面因素,建议选取导热系数小,容积比热容大于1 800 k J/(m3·K)的岩石作为蓄热材料。Considering natural environment characteristics in the plateau area,the study focuses on the rock bed in solar hot air heating system,and sets up the mathematical model. The effects of specific heat capacity,air inlet temperature,and air density in different altitudes on the performance of rock bed are simulated and analyzed,which is taking heat storage capacity and resistance pressure drop as two aspects. The results showed that under certain conditions,a rise in altitude of 1 000 meters equals in the decrease of 10%air density,5% average power of rock bed and 10%resistance pressure drop. In order to comply with the designed requirement of heat storage,the wind pressure and capacity should be increased.The resistance pressure drop will increase with decreasing of the inlet temperature. Considering the two factors between heat storage and thermal diffusivity,the rocks of heat storage materials with low heat conductivity should be chosen,which heat specific capacity is greater than 1 800 k J/（ m3·℃）.

关 键 词：高原地区 太阳能利用 岩石床 平均蓄热功率 阻力压降 

分 类 号：TU832[建筑科学—供热、供燃气、通风及空调工程]