One aspect clothing manufacturers need to consider is the thermal insulation of the clothing they produce....

 

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One aspect clothing manufacturers need to consider is the thermal insulation of the clothing they produce. In order to measure this, they have come up with their own unit of thermal insulation appropriately called the 'clo'. The 'clo' has the same dimensions as R values used to describe the thermal insulation of buildings. 1 clo = 0.155 K m2 W-!. Part 1) Typical winter PJ's have a thermal insulation of 0.46 clo, and a thickness of 0.20 mm. What is the thermal conductivity k for winter PJ's? k = W m- K- Part 2) The material making up these PJ's is tested on a mannequin. The mannequin has a body surface area of 1.49 m2. In a room at 6.27 °C what is the rate of heat loss if the mannequin is kept at 37.0°C? W Part 3) How much energy would need to be supplied to the mannequin to keep it at 37.0 °C? for 1.0 hours in this room? J One aspect clothing manufacturers need to consider is the thermal insulation of the clothing they produce. In order to measure this, they have come up with their own unit of thermal insulation appropriately called the 'clo'. The 'clo' has the same dimensions as R values used to describe the thermal insulation of buildings. 1 clo = 0.155 K m2 W-!. Part 1) Typical winter PJ's have a thermal insulation of 0.46 clo, and a thickness of 0.20 mm. What is the thermal conductivity k for winter PJ's? k = W m- K- Part 2) The material making up these PJ's is tested on a mannequin. The mannequin has a body surface area of 1.49 m2. In a room at 6.27 °C what is the rate of heat loss if the mannequin is kept at 37.0°C? W Part 3) How much energy would need to be supplied to the mannequin to keep it at 37.0 °C? for 1.0 hours in this room? J