冬季特朗贝墙内置卷帘对墙体热性能的影响

对大连地区某被动式太阳实验房进行实验研究,通过对玻璃幕墙内壁面温度、夹层内空气温度、特朗贝墙墙体温度等相关参数及室外气象参数等的实测,定量地分析了冬季夜间特朗贝墙采用卷帘保温的效果。并且通过有限空间自然对流换热理论计算分析,提出了更为合理的卷帘安装位置,最后根据围护结构响应因子BER指标,讨论了使用卷帘对提高室内热舒适性的影响。

EXPERIMENTAL STUDY OF THE SHADING DEVICE''''S THERMAL PERFORMANCE OF THE AIR-GAP OF THE TROMBE WALL DURING THE WINTER

To solve the problems of poor thermal insulation and heat preservation properties that exist in the traditional Trombe-wall,a new type of compound shading devise,which is equipped in the air gap,was developed.The shade was put down to avoid the over-heating by day in summer,and shut down to decrease the heat loss at night in winter.The thermal performance of the improved solar passive house in winter was discussed in the paper.Through the measurement of the solar irradiance,outdoor temperature,indoor temperature,wall temperature etc.of the advanced solar passive house in Dalian,the convective heat transfer and radiant heat transfer of the testing wall were analyzed.It was found that using the shade can decrease heat loss and help improving the thermal comfort obviously at night.The effect of the Trombe-walls on indoor thermal comfort was presented according to building envelope response factor(BER factor).The impact of the shade material and the fixing location on the performance were also evaluated and clarified.It is concluded that using the shade to enhance Trombe-wall's insulation can save energy and provide thermal comfort throughout the night in winter.