Specific Enthalpy Based Heat Stress Index for Indoor Environments without Radiation Effect  

作　　者：LIU Shuxiao LIU Yun ZOU Yue 刘书晓;刘赟;邹钺(College of Environmental Science and Engineering,Donghua University,Shanghai 201620,China;Dianwei Science Co.,Ltd.,Shanghai 201620,China)

机构地区：[1]College of Environmental Science and Engineering,Donghua University,Shanghai 201620,China [2]Dianwei Science Co.,Ltd.,Shanghai 201620,China

出　　处：《Journal of Donghua University(English Edition)》2022年第2期176-184,共9页东华大学学报（英文版）

摘　　要：Over 100 human thermal indices have been developed to predict the combined thermal impact on the body.In principle,these indices based on energy thermal budget equations should not only be the most complex but also be the most accurate.However,the simple indices based on algebraic or statistical models[e.g.,the wet-bulb globe temperature(WBGT)]continue to be the most popular.A new heat stress index,the enthalpy dry-bulb temperature(EnD)for indoor environments is developed and validated in this study.The EnD index is unique in that it uses the air specific enthalpy,not the wet-bulb temperature,to measure the latent heat transfer from the skin to the surrounding environment.Theoretically,the EnD index can be treated as the equivalent temperature based on the convective heat transfer coefficient h_(c).Comparison is made between the EnD index and the widely used WBGT index based on the experimental data taken from three independent studies available in the scientific literature.The results show that the EnD index can reduce the overestimation of the dry-bulb air temperature and thus reduce heat stress in most cases,especially for hot and humid environments.It can be concluded that the EnD index has the potential to replace the WBGT index as the standard heat stress index in the future.

关 键 词：heat stress wet-bulb globe temperature(WBGT) specific enthalpy indoor environment maximum allowable duration of heat exposure 

分 类 号：TU832[建筑科学—供热、供燃气、通风及空调工程]