Study On Subjective Evaluation And Objective Influences On Thermal Comfort

Clothes thermal comfort is one of the important problems in the field of comfort study and three issues will be discussed in the thesis. At first, physical indexes and subjective evaluations of thermal comfort were recorded by changing clo value of clothes during the experiment, which was conducted in climate chamber. Physical indexes including skin temperature, body temperature, heart beating rate, blood pressure and subjective evaluation including comfort value, temperature sensation value were all measured in the experiment with the changing of clo value. The change of cloth thermal sensation was analyzed based on the physical indexes and subjective evaluations, and at the same time the consistency of physical index and subjective evaluations were also discussed depended on the experiment data.Secondly, the influence of condition color on cloth thermal comfort was studied. Subjective evaluations and physical indexes of thermal comfort were recorded with changing colors of experiment condition. Conclusion by data analyzing was drawn that thermal comfort will be effected by environment color significantly. According to the conclusion, academic foundation of using color influence on thermal comfort to adjust thermal comfort was provided. Simultaneity the reason of subjective sensation declining influenced by color was analyzed by factor analysis and the main factor of comfort was found which proved color change could ameliorate the thermal comfort keeping whole comfort sensation.At last the influence of noise on thermal comfort was discussed byexperiment and subjective evaluations and physical indexes of thermal comfort were recorded during the change of noises. Conclusion was attained by data analyzing that thermal comfort will decline in the condition with noise over 85db. Synchronously the together existing of color and noise effecting on thermal comfort was discussed and the conclusion was obtained by subjective evaluations that thermal comfort was changed remarkably by the interaction effect of color and noise.The experiment conclusion of thesis was obtained by planning experiment, collecting data, analyzing data. All the experiments were conducted in the climate chamber and subjective sensations were evaluated by clothed experiment. Clothed thermal comfort were measured by combining subjective evaluation and object measurement, and perception language evaluated method of subjective evaluation were used which graded 5 rank of comfort value and 7 rank of temperature sensation; The clo value of experiment clothes, basic properties of fabric and physical indexes were measured by object instruments. The changes of thermal comfort during varying conditions were correctly evaluated by subjective and objective method.