A cold storage room has walls constructed of a 20cm layer of cork board contained between wooden walls each 2cm thick. Find the rate of heat loss in kcal/hr m’ if the wall surface temperature is -12°C inside the room and 30°C outside the room. Thermalrnconductivities of cork board and wood respectively are 0.036 and 0.092 kcal/hr m-K'm.

Your solution must include a sketch showing all dimensions and boundary conditions, and an electrical network representation of the system.