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Empirical Model to Calculate the Thermodynamic Wet-Bulb Temperature of Moist Air 被引量:1
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作者 Melitón Estrada-Jaramillo Iván Vera-Romero +2 位作者 José Martínez-Reyes Agustina Ortíz-Soriano Edgar Barajas-Ledesma 《Engineering(科研)》 2014年第9期500-506,共7页
An equation model for calculating the adiabatic temperature of the wet-bulb thermometer has been obtained empirical fit through a meteorological database, specificly a trough relative humidity and air temperature. A c... An equation model for calculating the adiabatic temperature of the wet-bulb thermometer has been obtained empirical fit through a meteorological database, specificly a trough relative humidity and air temperature. A comparison of the results of calculations with the use of this equation and from meteorological database was made. The model deducted of the comparison is valid for a dry bulb temperature range of 3°C to 35°C and for relative humidity percentage in a range of 7% to 97%. Normalized errors are less than 5.5%. It means a maximum variation of 0.55°C from data. However, this variation from error represents only 3.6% of the data sample. The equation model was satisfactory. 展开更多
关键词 wet-bulb temperature Equation dry-bulb temperature RELATIVE Humidity DRY Solar Technologies Humidified Gas Turbines
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Specific Enthalpy Based Heat Stress Index for Indoor Environments without Radiation Effect 被引量:1
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作者 LIU Shuxiao LIU Yun ZOU Yue 《Journal of Donghua University(English Edition)》 CAS 2022年第2期176-184,共9页
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... 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. 展开更多
关键词 heat stress wet-bulb globe temperature(WBGT) specific enthalpy indoor environment maximum allowable duration of heat exposure
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