The engine block of a small electric generator gets very hot during operation. It is needed to remove as much heat as possible from the top surface of the block while keeping its temperature at a maximum of Tmax=120 C. The top surface of the block is flat with an area of A=0.2 m2. Flow of air at a temperature of Tair=20 C in the vicinity of the block provides a convective heat transfer coefficient of h= 200 W/m2K. (a) Please calculate the rate at which heat is removed from the engine block. (b) In order to improve the rate of heat transfer, a copper fin (k=400 W/mK) of radius R=0.2 m and length L=0.6 m is placed on the surface. Assuming the end tip of the fin to be at the air temperature, please calculate the total amount of heat that can be removed from the surface. Assume that the introduction of the fin does not change the heat transfer coefficient, and that the area on the surface not covered by the fin continues to dissipate heat directly into the air through convection. Assume the fin to be made of Copper

Answer rating: 100% (QA)

a To calculate the rate at which heat is removed from the engine block we can use the convective heat transfer equation Q h A Tmax Tair Plug in the gi... View the full answer