Method and apparatus for dew point evaporative product cooling

  • US 6,776,001 B2
  • Filed: 10/28/2002
  • Issued: 08/17/2004
  • Est. Priority Date: 02/07/2000
  • Status: Expired due to Term
First Claim
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1. A method to provide indirect evaporative cooling while controlling humidity of the cooled product air by having three plates in parallel:

  • a) forming a first space and second space between adjacent plates with the middle plate being a common plate to both spaces;

    b) wetting opposing surfaces of the adjacent plates;

    c) keeping some surface areas of opposing surfaces dry;

    d) passing air in the first space in two types of channels, working channels and product channels;

    e) passing air in the second space in working channels and product channels in cross flow to the flow in the first space channels;

    f) controlling the humidity in the product channels by the amount of wet surfaces the product air is exposed to in the product channels; and

    g) cooling the air in the product channels by the dry surfaces being cooled by heat transfer across the common plate in this area and the evaporation cooling on the opposite surface of the common plate in the adjoining space that is occurring in a wet area of a working channel.

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