Effect of Local Thermal Sensation on the Overall in Stable Non-uniform Environment
With the growth of building energy consumption, new approaches to improve thermal comfort have been constantly proposed, such as floor air supply system, task-ambient air conditioning, etc, whose applications also resulted in non-uniform indoor thermal environments. Therefore, research on non-uniform thermal environment not only has strong application significance, but also can reveal the principles of human thermal responses. Through subjective survey, explorative investigations on human responses are performed when single body part is thermally stimulated. Cooling airflow is sent to 7 body parts respectively. Overall 93 samples are tested. Because of the obvious multieollinearity of thermal sensation among body parts, principal component regression approach is proposed for the first time, so as to obtain principal components under different experimental conditions. By regression and analysis of principal components, weighting factors of the 7 body parts are gained. The results show that weighting factors are unaffected by ambient or local air temperatures. However, different characteristics of trunk and limb are clearly seen. Prediction model on overall thermal sensation is obtained based on the weighting factors. Excellent agreement is shown between predictions and measurement. The model shows that the weighting factors of local thermal sensation on the overall thermal sensation are fixed values, and little difference is among the values of different body parts.
Local Thermal Sensation Non-uniform environment Weighting factor
Qianru Ding Quan Jin Xiangli Li Duanmu Lin
School of Civil and Hydraulic Engineering,Dalian University of Technology,Dalian,China
国际会议
The 6th International Symposium on Heating,Ventilating and Air Conditioning(第六届国际暖通空调学术会议)
南京
英文
833-840
2009-11-06（万方平台首次上网日期，不代表论文的发表时间）