Problem 1. Determine the heat transfer rate per square meter of wall area for the case of a furnace with inside air at 1340K. The furnace wall is composed of a 0.106m layer of fireclay brick (k= 1.13W/(mK) ) and a 0.635cm thickness of mild steel on its outside surface. Heat transfer coefficients on the inside and outside wall surfaces are 5110 and 45W/(m2K), respectively. The outside air is 295K. What will be the temperatures at each surface and at the brick-steel interface? Answer: Temperature of inside surface (1338K) and outside surface (493K) and interface (494 K)