Heat exchange element

CAFC
  • US 5,551,504 A
  • Filed: 03/10/1995
  • Issued: 09/03/1996
  • Est. Priority Date: 01/22/1993
  • Status: Expired due to Term
First Claim
Patent Images

1. A method of exchanging heat, comprising:

  • passing a first fluid through a central fluid passage of a heat exchanger;

    passing a second fluid through a plurality of substantially helically convoluted second fluid passages of a heat exchanger, the second fluid passages substantially surrounding at least a portion of the central fluid passage, wherein a cross-section of at least one of the second fluid passages is substantially oval or tear shaped; and

    passing the first fluid through a plurality of substantially helically convoluted first fluid passages of the heat exchanger, the first fluid passages substantially surrounding at least a portion of the second fluid passages.

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