Heat-ed - IE 327 Introduction to Work Design Dr. Andris...

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IE 327 1 IE 327 Introduction to Work Design Dr. Andris Freivalds Class #11
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IE 327 2 Ch. 6 – Heat, Ventilation, Shifts Heat stress a problem in industry Human modeled as cylinder with: core = trunk and head shell = skin Heat exchange equation S = M + C + R – E Want S =0 If S > 0 → heat stress If S < 0 → hypothermia
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IE 327 3 Heat Stress Measurement WBGT ( W et B ulb G lobe T emperature ) monitor Dry bulb (DB) = normal temperature Wet bulb (WB) = evaporation from wick, cools Globe temp (GT) = black body absorbs radiation • WBGT out = 0.7 WB + 0.1 DB + 0.2 GT WBGT in = 0.7 WB + 0.3 GT
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IE 327 4 Psychometric Chart (DB vs WB vs Humidity)
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The Exclusive AccuWeather RealFeel Temperature® It is an index that describes what the temperature really feels like. It's a unique composite of everything that affects how warm or cold a person feels, and measures the effects of temperature, wind, humidity, sunshine intensity, cloudiness, precipitation and elevation on the
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This note was uploaded on 05/04/2010 for the course I E 327 taught by Professor Staff during the Spring '08 term at Pennsylvania State University, University Park.

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Heat-ed - IE 327 Introduction to Work Design Dr. Andris...

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