Patent ID: 7494516

Claim:
A recuperative heat exchanger for use in a fuel processing system, the heat exchanger transferring heat from a fluid flow at one stage of a fuel processing operation to said fluid flow at another stage of the fuel processing operation, the heat exchanger comprising: a structure; a cylindrical wall having a first end axially fixed to the structure and a second end that is not fixed axially to the structure; a first convoluted fin bonded to a radially inwardly facing side of said wall, the convolutions of the first convoluted fin extending axially to direct said fluid flow through the heat exchanger; a second convoluted fin bonded to a radially outwardly facing side of said wall, the convolutions of the second convoluted fin extending axially to direct said fluid flow through the heat exchanger; and a flow path over the second end of the wall to direct said fluid flow from one side of the wall to the other side of the wall.