Heat exposure assessment in the working environment of a glass manufacturing unit
Working in hot environments can produce a strain on workers that may lead to discomfort, loss in performance and productivity, heat illness and death. For this reason there has been much research into human responses to hot environments. Although knowledge is not complete, a great deal is known and can be integrated to allow the proposal of practical methods for designing and evaluating working environments (Peterson, 1970; BSEN 27243, 199t Srivastava et at., 2000; Dowell and Tapp, 200R Lenzuni and Gaudio, 2007). Hot working environments can be classified as either hot dry or hot-humid. In hot dry environments, such as in steel mills, forge shops and glass manufacturing units, the thermal load on the workers is mainly from the sensible heat that escapes from the hot process equipment into the surrounding work space and from convective and radiant heat. In hot humid environments, such as paper industries, laundries, dye houses and deep mines, water vapor is added to the humidity afready present in the air from wet processes or from escaping steam.