Measuring Convection Heat Transfer Coefficient
A 2-m-long, 0.3 cm diameter electrical using extends across a room at 15 ℃, as shown in 1-34. Heat is generated in the wire as a result of resistance heating and the surface temperature of the wire is measured to be 152℃ in steady operation. Also , the voltage drop and electric current through the wire are measured to be 60 V 1.5 A, respectively. Disregarding any heat transfer by radiation, determine the convection heat transfer coefficient for heat transfer between the outer surface of the wire and the air in the room