Evaluating the Efficacy of a Thermal Exposure Chamber Designed for Assessing Workers' Thermal Hazard

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概要

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• Evaluating the Efficacy of a Thermal Exposure Chamber Designed for Assessing Workers' Thermal Hazard: Perng-Jy TSAI, et al.Department of Environmental and Occupational Health, Medical College, National Cheng Kung University, Taiwan-This study was conducted on a thermal exposure chamber designed for assessing workers' thermal hazard. In order to assess the efficacy of the studied chamber, three environmental conditions were selected to simulate high, middle and low thermal impact situations, with air temperatures (Ta) of 43.12,36.23 and 25.77°C, globe temperatures (T_g ) of 44.41,41.07 and 29.24°C, relative humidity (RH) of 77, 59 and 39 %, and air flow velocities (V_a) of 1.70, 0.91 and 0.25 m/s, respectively. For the three specified thermal impact conditions, results show that the coefficients of variation (CVs) for T_a, T_g) RH and V_a measured in the chamber studied were consistently less than 10%,except for V_a under the low thermal impact condition (=50%). For each specified thermal impact condition,we generated 1,000 environmental combinations by using the Monte Carlo simulation approach according to the variations obtained from the four environmental factors. We directly adopted the ISO 7933 approach to estimate the allowable exposure time (AET) for each simulated environmental condition. This study yielded a range in the 95% confidence interval (95% Cl) of the estimated AETs for the three specified thermal impact conditions which were consistently less than 5 min. We further conducted the sensitivity analysis to examine the effect of the four environmental factors on estimating AETs. We found V_a was the least important factor in estimating AETs for any specified thermalimpact condition. In conclusion, although V_a was found with great variation for the chamber specified in the low thermal impact condition, the exposure chamber studied can still be regarded as a feasible one for assessing workers' thermal hazard.

• 社団法人日本産業衛生学会の論文

著者

• Chen Wang-yi

  Institute Of Occupational Safety And Healthy Council Of Labor Affairs Executive Yuan

• Tsai Perng-jy

  Department Of Environmental And Occupational Health Medical College National Cheng Kung University:s

• Tsai Perng-jy

  Department Of Environmental And Occupational Health Medical College National Cheng Kung University

• Tsai Perng-jy

  Department Of Environmental And Occupational Health College Of Medicine National Cheng Kung Universi

• LIU Hung-Hsin

  Department of Occupational Safety and Health, Chung Shan Medical University

• Yeh Wen-yu

  Institute For Occupational Safety And Health

• Yeh Wen-yu

  Institute Of Occupational Safety And Healthy Council Of Labor Affairs Executive Yuan

• Liu Hung-hsin

  Department Of Occupational Safety And Hygiene Chung Hwa College Of Medical Technology

• Liu Hung-hsin

  Department Of Industrial Safety And Hygiene Chung Hwa College Of Medical Technology

• LO Chuh-Lun

  Department of Environmental and Occupational Health, Medical College, National Cheng Kung University

• SUN Yih-Min

  Department of Occupational Safety and Hygiene, Chung Hwa College of Medical Technology

• JUANG Yow-Jer

  Department of Occupational Safety and Hygiene, Chung Hwa College of Medical Technology

• Sun Yih-min

  Department Of Occupational Safety And Hygiene Chung Hwa College Of Medical Technology

• Lo Chuh-lun

  Department Of Environmental And Occupational Health Medical College National Cheng Kung University

• Juang Yow-jer

  Dep. Of Occupational Safety And Health Coll. Of Human Sci. And Technol. Chung Hwa Univ. Of Medical T

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