The heating system of a tall building consists only of a boiler, located in the basement, the radiators (located on each floor), and the pipe runs. What mode of heat transfer is used in this design?...

The heating system of a tall building consists only of a boiler, located in the basement, the radiators (located on each floor), and the pipe runs. What mode of heat transfer is used in this design?

Consider free convection over a horizontal plate with
T_s

>
T_f
. Compare the heat transfer from the top of the plate with that from the bottom of the plate. Which heat transfer is more efficient?