. Consider a vertical cylinder with surface temperature at 500K. Both ends are insulated. The cylinder is in 300K still air. The cylinder is 2 m high and 1 m in diameter and with an emissivity of 0.6. The cylinder is inside a large room whose walls due to winter are at 285K. Acceleration due to gravity is 9.81 m/s2. Determine convective heat transfer in kW from the cylinder and also the radiation heat exchange in kW with the walls of the room. Which heat exchange is higher?