Experimental Study On Human Thermal Comfort With Local Floor Heating

The personalized heating system can not only improve the comfort of the human body but also save energy.It has a good development prospect.However,in the current research,most of the experiments have studied the thermal comfort of the personalized system in the comfort zone.And the experiment and simulation are less combined.Therefore,This paper deviates from the comfort zone to carry out comprehensive analysis and optimization of experiments and simulations of local floor heating.This paper first analyzes the comfort of the local floor heating system through experiments.The results show that under each test condition,the subject's thermal response is significantly improved after using the local floor heating.Besides,local floor heating not only has a significant effect on the improvement of the foot thermal sensation,but also has a good lifting effect on the other and the overall thermal sensation.Then,This paper studies the correlation between the thermal sensation/thermal comfort of the foot and the thigh,calf and overall thermal sensation/thermal comfort.The results show that in a uniform environment,the foot thermal sensation/thermal comfort has a strong linear correlation with the thigh,calf and overall thermal sensation/thermal comfort.In a non-uniform environment,the foot thermal sensation with the thigh,the calf and the overall thermal sensation are related to the Gauss Function curve.The foot thermal comfort is not significantly correlated with the thermal comfort of the thigh,calf and the overall of the human body.But with the improvement of the foot thermal comfort,the thermal comfort of the thigh and calf also showed an upward trend.At the same time,the numerical simulation method is used to analyze the temperature field and PMV value of the human body at different background temperatures.The results show that the local floor heating makes the ambient temperature which is around the human body increase more than 2? compared with the background temperature,and the effect on the thermal sensation of the foot is remarkable,and the thermal sensation of the thigh and calf is also significantly improved.What's more,the optimizing local heating floor has a significant effect on the improvement of the thermal feeling of the foot,but its improvement effects on thethermal feeling of the thigh and calf are not obvious.This paper focuses on the effects of local floor heating on human comfort at background temperatures that deviate from the comfort zone.And its energy conservation,economy and applicability require further research.