estimate the heat-flow rate for a solid cement wall of a typical-size house. assume the wall is 5.0 m wide and 2.5 m tall.please show work and equations if possible! thanks everyone, i appreciate it!
42 W/m degC as a thermal conductivity value for light concrete. This means that .42 W will flow through a concrete wall 1 meter thick if the temperature difference on opposite sides of the wall is 1 deg C if the wall is thinner or the temperature difference is bigger then more will flow this makes sense, if it is hotter outside and the wall is thinner more heat comes in so, if it is 30 deg C outside, and 20 deg C inside, the temperature difference is 10 deg C if the wall is about 8 inches thick (or say .2 meters) then our flow is .42*10*(5*2.5)/.2 W/m-degC m*m/m = 263 Watts if I didn't make an arithmetic mistake, then then that should be a reasonable estimate
