Q-5 (8 marks): Calculate the number and length of tubes required for a single-pass steam Condenser to handle 25,000kg of dry saturated steam per hour at 60C. The cooling water enters the tubes at 20C and leaves at 30C. The tubes are of 25mm outside and 22.5 inside diameter. The thermal conductivity of the tube material is 100W/(mK). The average water velocity is 1.5m/s. Assume that the steam side film coefficient is 4500W/(m2K). The latent heat of the steam at 60C is 2358.5kJ/kg