Measurements of the physical parameters of the thermal environment
Article Abstract:
Assessment of the thermal environment at workplace and its effects on man require the measurement of mean radiant temperature, air temperature, humidity and air velocity. The use of an air temperature transducer with a precise platinum resistance temperature sensing element eliminates the effects of thermal radiation during air temperature measurements. Plane radiant temperature is measured using a transducer with two black-painted elements and two reflective gold-plated elements of the same size while a black globe thermometer helps measure mean radiant temperature. While air velocity is measured with sphere-shaped sensors, a dew- point transducer helps measure humidity.
Publication Name: Ergonomics
Subject: Business
ISSN: 0014-0139
Year: 1995
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Influence of intermittency and static components of work on heat stress
Article Abstract:
Experimental evaluation of the influence of physical workload distribution and composition on human heat tolerance and a comparison of the predictive potential of different heat stress indices in a chamber with climatic regulation and combinations of static and dynamic activities reveals that continuous and dynamic workloads elicit similar physiological responses. Predictive potential of different heat stress indices is not influenced by the presence or absence of the static work factor. Industrial thermal strain is best assessed by time weighed averaging of workload while intermittent combined workloads are best assessed by heat stress criteria.
Publication Name: Ergonomics
Subject: Business
ISSN: 0014-0139
Year: 1995
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Protective clothing and heat stress
Article Abstract:
The use of personal protective clothing (PPC) helps avoid exposure to harmful physical and chemical stress factors. Thermal radiation, chemical factors, high air temperature and humidity levels contribute to the thermal impact of PPC. Thermal impact assessment should include the local and overall heat balance effects of thermal radiation. Use of microporous material for protection against chemical agents affects evaporative heat exchange and lowers thermal strain. Microclimate effects, clothing ventilation, thermal insulation and evaporation resistance are some of the factors that should be analyzed during the evaluation of PPC.
Publication Name: Ergonomics
Subject: Business
ISSN: 0014-0139
Year: 1995
User Contributions:
Comment about this article or add new information about this topic:
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