Coaxial dual primary heat exchanger

Details Coaxial dual primary heat exchanger Coaxial dual primary heat exchanger

F - Mech Eng,Light,Heat,Weapons

28

D

F28D 7/10 (2006.01) F24H 3/06 (2006.01)

Patent

CA 2042441

ABSTRACT OF THE DISCLOSURE Basically the present invention in it's most simple form or embodiment is directed to a heat exchanger which provides for at least two heat exchange surfaces and which has the combustion of the fuel, which generates the heat, take place within the heat exchanger rather than the heat of combustion being introduced into the exchanger from an external combustion chamber and wherein the flame is directed into an opening of a truncated cone which cone has a shape approximating the shape of the flame and wherein the tips or ends of the flame "play" on an arcuate surface which is in thermal energy transfer communication with fluid to be heated which is at the unheated or ambient temperature. Additionally, note that the fluid, air in the case of a hot air system, is introduced into the passages where heat exchange will take place, and directed toward the hottest region of the combustion chamber. This is, the coldest air comes into thermal contact with the hottest region providing for maximum heat exchange. The flame is introduced into the combustion chamber in a direction which is essentially parallel to the axis of the cylindrical device. As a consequence the flame does not impinge onto any substantially flat or planar surface. Because of the nature of the construction of the nozzle etc., the flame forms into a cone configuration allowing thorough mixture with the combustion air and thus providing for complete and efficient combustion. The structural details and the pressures that are developed within the combustion chamber and the combustion region, cause the flame to "play along the conically configured walls of the truncated portion defining the combustion chamber and to impinge onto the curved/arcuate surface which conductively transfers heat to the air or fluid entering the first heat exchange volume or space. The heat of the combustion gases is given up to the fluid in basically five (5) heat exchange volumes of the device.

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