A central heating system from a house consists of 50m of 15mm outside diameter copper pipe with a wall thickness of 1mm. This pipe is used to distribute water at a temperature of 70 degrees C. Calculate the rate of heat loss from the length of pipe if it is fitted with a 15mm radial thickness of insulation. Take the ambient air temperature to be 15 degrees C and the internal and external surface heat transfer coefficients to be 100 W/m².K and 8 W/m².K respectively. The thermal conductivity of the copper is known to be 400 W/m.K and 0.05 W/m.K for the insulation. State your answer correct to three significant figures in Watts. Assume steady state radial heat transfer. Answer: Ensure that you consider the overall effects of radial heat transfer through conduction and convection. Additionally ensure that you consider the overall

Elements Of Electromagnetics
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Author:Sadiku, Matthew N. O.
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A central heating system from a house consists of 50m of 15mm outside diameter copper pipe with a wall thickness of 1mm. This pipe is used to distribute
water at a temperature of 70 degrees C.
Calculate the rate of heat loss from the length of pipe if it is fitted with a 15mm radial thickness of insulation. Take the ambient air temperature to be 15
degrees C and the internal and external surface heat transfer coefficients to be 100 W/m².K and 8 W/m2.K respectively. The thermal conductivity of the
copper is known to be 400 W/m.K and 0.05 W/m.K for the insulation.
State your answer correct to three significant figures in Watts.
Assume steady state radial heat transfer.
Answer:
Ensure that you consider the overall effects of radial heat transfer through conduction and convection. Additionally ensure that you consider the overall
length of the copper pipe.
Transcribed Image Text:A central heating system from a house consists of 50m of 15mm outside diameter copper pipe with a wall thickness of 1mm. This pipe is used to distribute water at a temperature of 70 degrees C. Calculate the rate of heat loss from the length of pipe if it is fitted with a 15mm radial thickness of insulation. Take the ambient air temperature to be 15 degrees C and the internal and external surface heat transfer coefficients to be 100 W/m².K and 8 W/m2.K respectively. The thermal conductivity of the copper is known to be 400 W/m.K and 0.05 W/m.K for the insulation. State your answer correct to three significant figures in Watts. Assume steady state radial heat transfer. Answer: Ensure that you consider the overall effects of radial heat transfer through conduction and convection. Additionally ensure that you consider the overall length of the copper pipe.
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