双热扰下节能墙体对室内热环境的动态影响

INFLUENCE OF ENERGY-SAVING WALL ON INDOOR THERMAL ENVIRONMENT UNDER THE CONDITION OF BILATERAL THERMAL DISTURBANCE

结合拉萨地区的气象数据和典型太阳能建筑分析模型,采用热平衡方程和傅氏级数解析法,分析室内外双侧热扰耦合作用下节能墙体构造方式对太阳能采暖建筑室内热环境的动态影响。结果表明,内保温构造方式下的内壁面温度波幅大于11℃,而外保温和夹芯保温幅度仅约为5℃。不同节能墙体构造方式对空气温度与壁面温度间的"温度波峰谷时差"存在影响,其中夹芯保温最小约0.5 h,外保温次之约为1.0 h,内保温最长约为4.0 h。操作温度较室内空气温度波幅有显著降低,其中夹芯保温构造的操作温度波幅为3.1℃,室内热环境的稳定性最好。

Combined with the meteorological data of winter solstice and typical building analytical model of the Lhasa area, heat balance equation and Fourier series analysis method were employed to analyze the dynamic effect of the energy-saving wall construction mode on indoor thermal environment under the conditions of indoor and outdoor thermal disturbance. The study results showed that the internal surface temperature amplitude of interior thermal insulation configuration is greater than 11 ℃. However, both the internal surface temperature amplitude of external thermal insulation configuration and sandwich insulation configuration are only about 5 ℃. Configuration modes of energy-saving wall have effects on the ＂peak-valley time difference＂ （time difference between the peak value of the indoor air temperature wave and the valley value of the wall internal surface temperature）. The peak-valley time differences of sandwich insulation configuration, external thermal insulation configuration and interior thermal insulation configuration wall is about 0.5 hours, about 1 hours, and about 4 hours respectively. The operating temperatures under the three kinds of heat preservation structure is siguificantly lower than that of the indoor air temperature, and the 3.1 ℃ operation temperature of the sandwich structure is the lowest.