Heat Loss by Convection and Conduction. A glass window with an area of 0.557 m² is installed in the wooden outside wall of a room. The wall dimensions

Extracted text: Heat Loss by Convection and Conduction. A glass window with an area of 0.557 m² is installed in the wooden outside wall of a room. The wall dimensions


Extracted text: are 2.44 x 3.05 m. The wood has a k of 0.1505 W/m· K and is 25.4 mm thick. The glass is 3.18 mm thick and has a k of 0.692. The inside room temperature is 299.9 K (26.7°C) and the outside air temperature is 266.5 K. The convection coefficient h; on the inside wall of the glass and of the wood is estimated as 8.5 W/m2 K and the outside h, also as 8.5 for both surfaces. Calculate the heat loss through the wooden wall, through the glass, and the total. Ans. 569.2 W (wood) (1942 btu/h}; 77.6 W (glass) (265 btu/h); 646.8 W (total) (2207 btu/h}