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Heat exchanger for fuel cell system

  • US 20020104645A1
  • Filed: 02/05/2002
  • Published: 08/08/2002
  • Est. Priority Date: 02/07/2001
  • Status: Active Grant
First Claim
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1. A heat exchanger for use in a fuel cell system, the heat exchanger comprising:

  • heat transfer tube elements having an flat passage allowing flow of a cooling medium therein;

    outer fins retained between adjacent the heat transfer tube elements allowing flow of a gas there through and a core formed by laminating the heat transfer tube elements and the outer fins in order;

    wherein the gas flows through the outer fins in a direction orthogonal to the direction of cooling medium flow which flows in the passage in each heat transfer tube element; and

    a passage in at least a section of the passage for cooling medium provided in each heat transfer tube element comprises a large passage and a small passage group disposed in parallel, the large passage having a large width and being provided upstream to the core with respect to the direction of gas flow, and the small passage group comprising a plurality of small passages being narrower than the large passage and being provided downstream of the core with respect to the direction of gas flow.

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