偏冷环境局部辐射供暖对热舒适性的影响

Effect of Local Radiant Heating on Thermal Comfort in Cold Environment

偏冷环境下,利用局部辐射供暖可以改善热舒适性。在12.5℃和14.5℃的环境温度下,使用200 W、300 W、500 W的局部辐射热源分别对脚踝及背部进行局部辐射供暖,测试了35名受试者的皮肤温度,采用主观调查问卷的方式统计受试者的热感觉投票。研究结果表明,局部供暖可以改善人体的热舒适性,其中背部供暖方式对改善人体热舒适的效果更好。在环境温度为12.5℃,对人体背部辐射功率为300 W时,TSV可达0.05;环境温度为14.5℃时,对人体背部辐射功率为200 W时,TSV也可达到-0.2。节能计算分析表明,偏冷环境下局部辐射供暖具有一定的节能效果。在人数一定的情况下,房间面积越大,由于环境温度降低而减小的供热量也越大,节能效果越好。

In cold environment, local radiant heating can improve thermal comfort. The local radiant heating equipment was used to heat subjects’ ankles and backs separately at an ambient temperature of 12.5 ℃ and 14.5 ℃, with the radiant power of 200 W, 300 W and 500 W. 35 subjects participated the test. Their thermal comfort changes were collected through a subjective questionnaire. The results show that local radiant heating can improve human thermal comfort. The effect of radiant heat source located on the back of human body is better than that on ankle. When the ambient temperature is 12.5 ℃ and the radiant power on the back of the human body is 300 W, the TSV can reach 0.05. When the ambient temperature is 14.5 ℃ and the radiant power on the back of the human body is 200 W, the TSV also reaches-0.2. Energy saving calculation and analysis show that the local radiant heating has a certain energy saving effect in cold environment. In the case of a certain number of people, the larger the room area, the larger the heat supply due to the decrease of the ambient temperature, and the better the energy-saving effect.