HEAT EXCHANGER

摘要

A heat exchanger (1) has a helical tubular member (4) with a helical outer surface (16) providing contact points (23) around the periphery of the tube (4) which engages with the inner surface of an outer tube (12) so as to create a plurality of baffles (15). A fluid will therefore be constrained to flow along the path defined by the baffles (15) with a transfer of thermal energy to or from a fluid flowing through helical tube (4) in the direction of arrow (F). The use of the heat exchanger (1) in natural convection and forced convection hot liquid boilers is described.