Indirect Evaporative Coolers with Enhanced Heat Transfer

Eric Kozubal (Inventor), Jason Woods (Inventor), Ronald Judkoff (Inventor)

Research output: Patent


A separator plate assembly for use in an indirect evaporative cooler (IEC) with an air-to-air heat exchanger. The assembly includes a separator plate with a first surface defining a dry channel and a second surface defining a wet channel. The assembly includes heat transfer enhancements provided on the first surface for increasing heat transfer rates. The heat transfer enhancements may include slit fins with bodies extending outward from the first surface of separator plate or may take other forms including vortex generators, offset strip fins, and wavy fins. In slit fin implementations, the separator plate has holes proximate to each of the slit fins, and the separator plate assembly may include a sealing layer applied to the second surface of the separator plate to block air flow through the holes. The sealing layer can be a thickness of adhesive, and a layer of wicking material is applied to the adhesive.
Original languageAmerican English
Patent number9,140,471 B2
Filing date22/09/15
StatePublished - 2015

NREL Publication Number

  • NREL/PT-5500-65248


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