Example:. Consider a cylindrical body 30 cm in length and 15 cm in diameter at 327°C suspended in the air. Assuming the body closely approximates a blackbody, determine (a) the rate at which the cylinder emits radiation energy and (b) the spectral blackbody emissive power at a wavelength of 2.5 µm. (c) Also, determine the wavelength at which the emission of radiation from the filament peaks.

1. A wall of a house has a size of 20 mx 2 m. It consists of 3 layers of materials: 6 cm wood, 10 cm fiberglass, and 6 cm wood. The conduction coefficients of wood and fiberglass are 0.2 and 0.05, respectively. The radiation cannot be ignored, and the inner and outer surfaces of wall both have emissivity of 0.9. The room temperature in the house is always 20 C and the convection coefficient inside is always 5 W/m²-K. In a summer day, the outside temperature is 35 C and the convection coefficient outside is always 20 W/m²-K. In addition to the above heat transfer, the sunlight shines on the wall and gets absorbed. The energy of this additional sunlight heat absorbed by the wall is 800 W/m². (hint: the thermal circuit includes an additional heat source from the sunlight.) a.) What is the exterior temperature of the wall? b.) What is the the heat removal rate by AC to maintain the room temperature at 20 C ? c.) What would the exterior temperature and heat removal rate be if the fiberglass…