摘要
建筑反射隔热涂料是一种能大幅度减少太阳辐射热进入建筑室内的新型材料。以现场实测的方式对建筑反射隔热涂料对冬季室温的不利影响进行了分析。无内热源实验测试分析表明:当太阳辐射强烈时,普通涂料房间室温皆大于等于建筑反射隔热涂料房间室温,两者差值最大为3.4℃,平均温差1.8℃;当太阳辐射强度接近于零后,建筑反射隔热涂料房间温度大于普通涂料房间温度,两者温度差值最大为1.1℃,平均温差0.4℃。在样板间内设置内热源(室温控制在22℃),通过分析室内热源耗电量并结合无内热源实验时两房间室内温差变化,得出建筑反射隔热涂料在太阳辐射强烈时不节能、太阳辐射弱时节能的结论。最后通过实验数据计算等效热阻,验证建筑反射隔热涂料的反节能与节能,并对规范中计算冬季等效热阻的方法进行了讨论。
Building reflective thermal insulation coating is a new material that can significantly reduce the solar radiation heat into the building interior,but there are many controversies about it. In this paper,the adverse effects of building reflective thermal insulation coatings on room temperature in winter were analyzed by means of field measurements. After the experiment without internal heat source,the test data and analysis show that when the solar radiation is strong,the room temperature of ordinary coating is greater than that of the room with architectural reflective thermal insulation coating,and the maximum difference between them is 3. 4 ℃,and the average temperature difference is 1. 8 ℃;when the solar radiation intensity is close to 0,the room temperature of architectural reflective thermal insulation coating is greater than that of ordinary coating,the maximum difference between them is 1. 1 ℃,and the average temperature difference is 0. 4 ℃ . For studying this phenomenon,internal heat source was set in the sample room and the room temperature was controlled at 22 ℃ by temperature control device. By analyzing the power consumption of indoor heat source and combining with the change of indoor temperature difference between two rooms when there was no internal heat source,this study concluded that the building reflective thermal insulation coating did not save energy when the solar radiation was strong and saved energy when the solar radiation was weak. Finally,the equivalent thermal resistance was calculated by the experimental data to verify the inverse energy saving and energy saving of building reflective thermal insulation coating again,and the method of calculating equivalent thermal resistance in winter in the specification was discussed and improvement suggestions were put forward.
作者
庞华宇
马立
PANG Huayu;MA Li(School of Civil Engineering and Architecture,Southwest University of Science and Technology,Mianyang 621010,Sichuan,China)
出处
《西南科技大学学报》
CAS
2021年第4期60-66,共7页
Journal of Southwest University of Science and Technology
关键词
建筑反射隔热涂料
室内温差
太阳辐射强度
等效热阻
内热源
Building reflective thermal insulation coating
Indoor temperature difference
Solar radiation intensity
Equivalent thermal resistance
Internal heat source
