上海地区不同季节PET和UTCI的适用性比较

Comparison of Applicability of PET and UTCI in Different Seasons in Shanghai

为分析室外热舒适评价指标在不同环境条件下适用性的差异,以上海小陆家嘴地区为例,通过现场实测和问卷调查获得当地7条街道各个季节的环境参数和人体热感觉投票。对生理等效温度(PET)、通用热气候指标(UTCI))与热感觉投票结果的相关性进行比较分析。结果发现当日平均温度达到20℃时UTCI与热感觉投票结果更为一致。通过对PET和UTCI计算方式的比较分析,指出PET和UTCI指标在不同季节计算时对不同环境参数(温度、相对湿度、风速、平均辐射温度)设置的权重不同,且与影响人体热感觉的主导环境参数有所不同。最终,本地区夏季采用UTCI计算得到的户外热舒适结果与主观感受更为一致,冬季PET更为一致。

In order to analyze the applicability of outdoor thermal comfort indices under different environmental conditions,the environmental parameters and the human thermal sensation votes of 7 typical streets in each season in the Lujiazui Financial and Trade Zone,Shanghai were obtained by field tests and questionnaire surveys.The correlation between physiological equivalent temperature(PET),universal thermal climate index(UTCI)and thermal sensation voting results was compared and analyzed.It is found that UTCI was more consistent with the thermal sensation voting results when the daily average temperature reached 20℃.Through the comparative analysis of the calculation methods of PET and UTCI,it is pointed out that the weights of environmental parameters(temperature,relative humidity,wind speed,average radiation temperature)is different,which is also different from the dominant environmental parameters of thermal sensation.It is,therefore,concluded that the outdoor thermal comfort results calculated by UTCI in summer in this region are more consistent with subjective feelings,and PET is more consistent in winter.