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

• 作者: LIU Shuxiao LIU Yun ZOU Yue
• 来源期刊: 东华大学学报（英文版）
• 学科: 工学
• 年，卷（期）: 2022,（2）
• 所属期刊栏目: Advanced Equipment and Control for Smart Grid
• 页码范围: 176-184
• 页数: 9页
• 分类号: TU832
• 语种: 英文
• DOI: 10.19884/j.1672-5220.202103007

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 hc . 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.