Air cooling system

An indirect evaporative and dry surface cooling system for conditioning the air in a structure, said system including

• (a) A first evaporative heat exchange structure adapted to receive hot fluid to be cooled for lowering the temperature thereof;
• (b) a second evaporative heat exchange structure adapted to receive hot fluid to be cooled for lowering the temperature thereof, said heat exchange structures each having air inlets and respective outlets;
• (c) a first coil for pre-cooling air directed into said first evaporative heat exchange structure, said coil receiving cool fluid from said first evaporative heat exchange structure, said cool fluid coursing through said coil and absorbing heat from air directed over said coil into said first evaporative heat exchange structure;
• (d) a second coil for pre-cooling air directed into said first evaporative heat exchange structure, said second coil receiving cool fluid from said second evaporative heat exchange structure and receiving cooled air from said first coil, said cooled fluid from said second evaporative heat exchange structure coursing through said second coil and absorbing heat from air directed over said second coil into said first evaporative heat exchange structure;
• (e) fan means for directing air through said first and second pre-cooling coils and into and through said first evaporative heat exchange structure;
• and
• (f) a third coil for cooling air directed into the interior of said structure, said interior air third coil receiving cool fluid from said first evaporative heat exchange structure, said cool fluid from said first evaporative heat exchange structure coursing through said third coil and absorbing heat from air directed over said third coil into said structure.