Example: Heated Wire Given Coil of wire in an electrical resistance baseboard heater assume that the wire can be treated as a horizontal cylinder Wire is 1 mm in diameter T=120°C T=20C Find: Heat loss to room per unit length of wire USing air properties at a film temperature of T+t =709 Heat Transfer Su Yongkang School of Mechanical EngineeringHeat Transfer Su Yongkang School of Mechanical Engineering # 8 Example: Heated Wire Given: • Coil of wire in an electrical resistance baseboard heater • Assume that the wire can be treated as a horizontal cylinder • Wire is 1 mm in diameter Find: • Heat loss to room per unit length of wire Using air properties at a film temperature of ºC 120 C  Ts = 20 C  T = 70 2 = + = T T T s f