A small power plant uses a wet cooling tower to transfer heat from cooling water to the air. The air enters the cooling tower at 1 atm, 40°F, and a relative humidity of 70%. The air exits as saturated air at 1 atm and 80°F. The cooling water enters the cooling tower at 85°F and exits the cooling tower at 45°F. The mass flow rate of the entering cooling water is 400 lbm/s. Determine the rate at which water must be replaced in the cooling water returning to the process, and the volumetric flow rate of the incoming moist air to the cooling tower.
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