A small house is built in the arctic. It has four square walls of 500 ft2 each. For simplicity, we will assume it has no windows, and we are only interested in calculation the heat loss through the four walls. A total of one hundred Watts (100 kW) escape through the four walls.
a) Calculate the Thermal Conductivity ( K ) in W/(m K) given the following data:
X: Thickness of walls is six inches ( 6" )
T1 : inside temperature is ( 60 F )
T2 : outside temperature is ( - 50 F )
b) Calculate the Thermal Conductivity ( K ) in BTU/(s.ft. oR)
Hint: British Thermal Unit (BTU) is the American system unit for energy.