Patent ID: 7195059
Filing Date: 2007-03-27
Classification: B01J,C01B,F28F

Abstract:
1. A heat exchanger comprising: a passageway having an internal passage adapted to form a first flow path in a multi-pass arrangement; an array of conduits having internal passages that collectively form a second flow path, said array of conduits extending through said internal passage of said passageway; a first heat transfer fin provided within said passageway in a first pass of said multi-pass arrangement; and a second heat transfer fin provided within said passageway in said first pass, wherein a first conduit of said array of conduits extends from an inlet manifold to an outlet manifold, wherein a second conduit of said array of conduits extends from said inlet manifold to said outlet manifold, wherein said first conduit is provided with a lower total heat exchange surface area per unit volume therein than said second conduit at portions thereof corresponding to said first pass, and wherein said first conduit and said second conduit are provided with substantially equal total heat exchange surface area per unit volume at portions thereof corresponding to a second pass of said multi-pass arrangement, and wherein said first heat transfer fin is attached to exterior surfaces of said first conduit and said second conduit, and said second heat transfer fin is attached to the exterior surface of said second conduit and is not attached to said exterior surface of said first conduit.