Patent ID: 6845629
Filing Date: 2005-01-25
Classification: F28C

Abstract:
1. A counterflow plate-type evaporative heat exchanger, comprising: a plurality of parallel plates having side edges and top and bottom edges, wherein said parallel plate pairs define alternating dry and wet passages; a water reservoir disposed below said plates connected to a water distribution system disposed above said plates, and a pump that circulates water from said reservoir to said distribution system, and wherein said water flows downward through said wet passages, to wet the surfaces of the plates forming said wet passages, into said reservoir; a first airstream that flows into upper side openings of said dry passages and downward through said dry passages; and a second airstream that flows from an area located below said plates and above said reservoir, into open bottom edges of said wet passages and upward through said wet passages before exiting through open top edges of said wet passages, so that said second airstream is directly evaporatively cooled, and thereby indirectly evaporatively cools said first airstream.