Over sizing a cooling tower represents one of the best
energy efficiency investments that can be made since it will deliver colder
condenser water on design days as well as reduce energy consumption
throughout the rest of the year. In essence, the tower surface area is made
larger and more air is brought into contact with the same amount of cooling
tower water. While tower fan power may be slightly higher on design days,
the offsetting energy savings in the chiller itself usually more than
compensates.
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