摘要
基于一维非稳态热湿耦合模型,利用有限差分法对模型进行数值求解,针对保温材料的热导率为常数以及热导率为温湿度的函数这两种情况,分别使用苯板(EPS)、挤塑聚苯乙烯泡沫板(XPS)、聚氨酯(PU)作为保温层时,对冷库全年总能耗进行了比较。结果表明:保温材料吸湿会增大其热导率,从而大大增加了冷库总能耗,且保温层分别为XPS,PU,EPS时冷库全年总耗电量分别增加了5009.7kW.h,5492.6kW.h,8547.3kW.h。
A numerical calculation by Finite Difference Method was presented based on a transient I-D mathematical model of heat and mass transfer. The comparison of heat performance of cold storage wall was performed for three kinds of insulation materials： expanded polystyrene （EPS）, extruded polystyrene （XPS）, polyurethane （PU） in the case of the heat conductivity of insulation material is constant and the function of temperature and moisture. The results showed that the heat conductivity is larger when considering the absorption of moisture of the insulation material so that the energy consumption of cold storage is larger. The power consumption of cold storage increases 5 009.7 kW.h, 5 492.6 kW.h, 8 547.3 kW.h respectively when using XPS, PU, EPS as the insulation materials within a year.
出处
《建筑技术》
2012年第7期608-610,共3页
Architecture Technology
基金
江苏建设系统科技项目(JS2011JH15)
关键词
冷库
保温材料
热湿耦合
吸湿特性
总能耗
cold storage wall
insulation material
coupled heat and mass transfer
moisture absorptionproperties
energy consumption
