Low pressure gas vaporizer and method of operation

F - Mech Eng,Light,Heat,Weapons – 02 – M

Patent

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Details

F02M 31/10 (2006.01) F02M 21/06 (2006.01)

Patent

CA 2198157

A fuel vaporizer and method of fuel vaporization are discribed for use with a fuel such as propane, that is know to tend to liquefy at low temperatures and to vaporize at high temperatures. The vaporizer and method described pertain to a series of internal walls and cavities which promote heat-exchange and transfers heat from a fluid engine coolant to the fuel. The transfer of heat and vaporization of fluid occurs by virtue of movement of the fuel through a series of countercurrent passages created by the walls and cavities, with increasing cross-sectional dimensions in the passages to accomodate the expansion of fuel from the liquid to the gaseous state. The heat is transferred by conduction across a metallic interface which forms part of the vaporizer and which separates the fuel from the coolant.

On décrit un vaporisateur de carburant et une méthode de vaporisation de carburant pour utilisation avec un combustible, comme le propane, qui est reconnu pour avoir tendance à se liquéfier à basse température et à se vaporiser à haute température. Le vaporisateur et la méthode décrits font intervenir une série de parois internes et de cavités qui favorisent les échanges de chaleur et les transferts de chaleur d'un fluide de refroidissement d'un moteur vers le carburant. Le transfert de chaleur et la vaporisation du fluide surviennent par suite du mouvement du carburant à travers une série de passages à contre-courant créés par les parois et les cavités, aidés par une augmentation de la section des passages pour accommoder la dilatation du carburant accompagnant son passage de l'état liquide à l'état gazeux. La chaleur est transférée par conduction à travers une interface métallique qui fait partie du vaporisateur et qui sépare le carburant du fluide de refroidissement.

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