In order to stay warm, divers often wear some sort of thermal protection, like a "wetsuit". Often this is a neoprene "foamed" material, which traps gas bubbles as the insulating material. For this problem, assume:
- the thermal conductivity is that of air (? = 0.03 W/m-K)
- the suit thickness is d = 1.5 mm
- the area of the suit is A ~2 m2
- the diver's initial body temperature is Td,i?= 37?C (98.6?F)
- the water temperature is Tw?= 5?C
- the diver "weighs" m = 70 kg
- the specific heat of the diver is cd?= 3480 J/kg-K (this is slightly less than the specific heat of water 4184 J/kg-K due to the presence of protein, fat, and minerals)
1) What is the thermal resistance of the suit??
2) What is the heat capacity of the diver?
3)?What is the total amount of heat flow needed to change the diver's temperature from 37?C to 35?C?
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Oct 07, 2020EXPERT
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