2. Steam enters the condenser of a steam power plant at 20kPa and a quality of 95 percent with a mass flow rate of 20,000kg/h. It is to be cooled by water from a nearby river by circulating the water through the tubes within the condenser. To prevent thermal pollution, the river water is not allowed to experience a temperature rise above 1C. If the steam is to leave the condenser as saturated liquid at 20kPa, determine the mass flow rate of the cooling water required