Patent ID: 8783053

Claim:
A system for cooling a primary air supply comprising: (a) a first evaporative cooling system comprising; (i) means for circulating fluid through the first system; (ii) a primary heat exchange element and a primary cooling tower, the primary cooling tower having a second air supply and being operatively connected to the primary heat exchange element; (b) means for selectively forcing the primary air supply over the primary heat exchange element; (c) a second separate evaporative cooling system comprising; (i) means for circulating fluid through the second system; (ii) a second heat exchange element and a second cooling tower, the second cooling tower having a third air supply and being operatively connected to the second heat exchange element; and (d) means for selectively forcing the second air supply to the primary cooling tower over the second heat exchange element such that the second air supply to the primary cooling tower has a lower wet bulb temperature than the ambient air; and wherein each of the first and second evaporative cooling systems has a closed circulatory fluid circuit.