A refrigerant 22 condenser has four water passes and a total of 60 copper tubes that are14mm ID and have 2 mm wall thickness. The conductivity of copper is 390 W/m-K. Theoutside of the tubes is finned so that the ratio of outside to inside area is 1.7. The coolingwater flow through the condenser tubes is 3.8 L/s.
a) Calculate the water-side coefficient if the water is at an average temperature of 30 ºC. atwhich temperature k= 0.614 W/m-K, ρ= 996 kg/m3, and μ= 0.000803 Pa-s.
b) Using a mean condensing coefficient of 1420 W/m2-K, calculate the overall heat transfercoefficient based on the condensing area.