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  • Title: [Setting standards for the industrial microclimate via integral indices under conditions close to overheating].
    Author: Berakha R.
    Journal: Probl Khig; 1988; 13():83-98. PubMed ID: 3241806.
    Abstract:
    The possibilities of the WBGT and Belding and Hutch methods for standardization of the industrial microclimate in conditions, near to overheating, are discussed. The acceptable WBGT temperatures according to the norms of NIOSH are compared with the sanitary norms existing in this country. It is pointed out that the NIOSH norms allow significantly higher temperatures of the air (up to 10 degrees C) from the regulated according to the Bulgarian State Standards (BSS) 14776-79. The differences with the sanitary norms, regulating the radiant microclimate are also considerable. On this basis a conclusion is made, that the application of the WBGT method in the sanitary practice in this country should be preceded by the standardization of the allowable WBGT temperatures. The basic shortcomings of the method Belding-Hutch are mentioned: inaccuracies in the equation of the heat balance, incongruity of the accepted criteria with the up-to-date physiological data. The comparison of the two discussed methods show, that considerable differences in the interpretation of one and the same microclimatic conditions are possible. A modification of the method Belding-Hutch is proposed. The proposed model can be used in standardization of the optimum and the allowable microclimatic parameters depending on the heat radiation, clothes, on the negative temperatures a.o. A set of graphics for determination of temperature is proposed without using the globe thermometers by velocity, relative humidity, temperature of the air and heat radiation.
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