A heat flux meter at the outer (cold) wall of a concrete building indicates that the heat loss through a wall of 10 cm thickness is 20 W/m2. If a thermocouple at the inner surface of the wall indicates a temperature of 22?C while another at the outer surface shows 6?C, calculate the thermal conductivity of the concrete and compare your result with the value in Appendix 2, Table 11.GIVENConcrete wallThickness (L) = 100 cm = 0.1 mHeat loss (q/A) = 20 W/m2Surface temperatureInner (Ti) = 22?COuter (To) = 6?CASSUMPTIONSOne dimensional heat flow through the wallSteady state conditionsexist

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- L-0.1 m Як —то - в°с T= 22°C