Patent ID: 7438122

Claim:
An axial heat exchanger, comprising: a longitudinal and substantially axially extended outer channel adapted to enclose a longitudinal and axial flow of a first gas medium through the outer channel, the outer channel including a first opening in a first end and a second opening in a second end longitudinally opposite the first end, the first opening and the second opening having a diameter substantially equivalent to a diameter of the outer channel, the first gas medium entering the outer channel through the first opening and exiting the outer channel through the second opening; and a plurality of substantially parallel inner channels adapted to enclose a flow of a second liquid medium, which inner channels are arranged inside the outer channel so as to extend substantially axially along the inside of the outer channel for enabling a transfer of heat between the first gas medium and the second liquid medium, wherein: at least one inner channel is joined with at least one elongated sheet; the sheet extends substantially axially along the inner channel so as to substantially coincide with the direction of flow of the first gas medium through the outer channel; and a center channel is axially arranged substantially along the center or center axis of the axial heat exchanger for distributing the second liquid medium to the inner channels.