Chapter 1, Problem 132P

Consider a person standing in a room maintained at ${20}^{\text{o}}\text{C}$ at all times. The inner surfaces of the walls, floors, and ceiling of the house are observed to be at an average temperature of ${12}^{\text{o}}\text{C}$ in winter and ${23}^{\text{o}}\text{C}$ in summer. Determine the rates of radiation heat transfer between this person and the surrounding surfaces in both summer and winter if the exposed surface area, emissivity, and the average outer surface temperature of the person are $1.6m^2,0.95,$ and ${32}^{\text{o}}\text{C,}$ respectively.