Determine the heat transfer rate (W/m 2 ) through a 2-layer wall with the following properties: Inside

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Question:

Determine the heat transfer rate (W/m²) through a 2-layer wall with the following properties: Inside temperature =15 C; outside temperature = -15 C; inner layer thickness =13 mm; inner layer thermal conductivity = 0.16 W/(m C); outer layer thickness = 200 mm; outer layer thermal conductivity = 0.04 W/(m C); inner h = 10 W/(m² C); outer h = 25 W/(m² C). HINT: Assume A = 1 m².