Heat exchanger

Abstract

A heat exchanger comprising an outer conduit and an inner conduit, arranged inside of and along the longitudinal axis of the outer conduit, the inner conduit and the outer conduit being arranged to form a fluid flow channel between the inner surface of the outer conduit and the outer surface of the inner conduit, the fluid flow channel having a cross sectional form, in a plane substantially perpendicular to the longitudinal axis of the outer conduit, that is elongate being substantially greater in the circumferential direction of the outer conduit than in the radial direction of the outer conduit.

1 - 33 . (canceled) 
     
     
         34 . A heat exchanger comprising:
 an outer conduit having an inner surface and a longitudinal axis; and   an inner conduit having an outer surface, the inner conduit arranged inside of and along the longitudinal axis of the outer conduit;   wherein the inner conduit and the outer conduit are arranged to form a fluid flow channel between the inner surface of the outer conduit and the outer surface of the inner conduit; and the fluid flow channel has a cross sectional form, in a plane substantially perpendicular to the longitudinal axis of the outer conduit, that is elongate being substantially greater in the circumferential direction of the outer conduit than in the radial direction of the outer conduit.