1. A person is standing in a room maintained at 20 degrees of Cat all times. The inner surfaces of the walls, floors, and theceiling of the house are observed to be at an average temperatureof 10 degrees C in winter and 25 degrees C in summer. Determine therate of radiation heat transfer between this person and thesurrounding surfaces if the exposed surface area and the averageouter surface temperature of the person are 1.5 m^2 and 29 degreesC respectfully. The emissivity of human skin at thesewavelengths/temperatures is 0.95. Now, If the person above were ina breezy room, how much additional energy would be lost viaconvection? The convection heat transfer coefficient is 6 W/m^2 K?(b) What percentage of the total is this? (Calculate this forsummer and for winter.)
