Heat exchanger with multiple turbulent flow paths

摘要

A heat exchanger includes a body (4) on the surface of which are provided helical and spiral paths (5) which will provide multiple and turbulent flow paths A for a first fluid such as water which is caused to flow through chamber (3) relative to a spirally wound heat exchange tube (6) and in a heat transfer relationship with a second fluid flowing through the tube (6). The tube (6) has one or more further helical or spiral flow paths (9) on its external surface. The multiple flow paths A will extend the residence time for the first fluid within the heat exchanger (1) and this together with the turbulence will maximize heat transfer. Preferably a portion of the first fluid flow will be through a central aperture in body (4) where turbulence is also created by the helical or spiral paths of the tube (6) as it extends through the aperture.