Determine the thickness of insulation to reduce the heat loss by 60%of that of the bare pipe
A hot water pipe of outside diameter 2.5 cm and surface temperature 85°C passes from the boiler room to the heater through a room at 20°C. The convective heat transfer coefficient is 15 W/m2K. Insulation with conductivity of 0.11 W/mK is recommended. Determine the thickness of insulation to reduce the heat loss by 60%of that of the bare pipe. Also determine the surface temperature of the insulation.
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