Ashell-and-tube type condenser is to be made with 3/4 in. outer diameter (0.654 in. inner diameter) brass tubes, and the length of the tubes between tube plates is 3 m. under the worst conditions, cooling water is available at 21°c and the outlet temperature is 31°c. water velocity inside the tubes is approximately 2 m/s. the vapor side film coefficient can be taken as 10,000 w/m^2 ⋅ k. calculate the overall heat transfer coefficient for this heat exchanger.