Viscous fluid type heat generator with means for enhancing...

F - Mech Eng,Light,Heat,Weapons – 24 – J

Patent

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Details

F24J 3/06 (2006.01) B60H 1/03 (2006.01) F24J 3/00 (2006.01) F28F 13/06 (2006.01)

Patent

CA 2231950

A viscous fluid type heat generator which includes a housing assembly defining a heat generating chamber and a heat receiving chamber arranged adjacent to the heat generating chamber via a partition wall disposed therebetween. A rotor element is mounted to be rotated by a drive shaft for rotation within the heat generating chamber. A viscous fluid is held in a gap defined between the inner wall surfaces of the heat generating chamber and the outer faces of the rotor element, for heat generation under shearing stress applied by the rotation of the rotor element. A heat exchanging fluid circulates through the heat receiving chamber to receive heat transferred through the partition wall from the heat generating chamber. A plurality of grooves are formed on at least one of the inner wall surfaces of the heat generating chamber to increase a total heat transfer surface area in the inner wall surfaces, and thus to enhance a heat transfer efficiency through the partition wall. The density of arrangement of the grooves in the outer peripheral area of the inner wall surface is larger than that in the inner peripheral area of the latter.

La présente invention a pour objet un générateur de chaleur de type à fluide visqueux constitué d'une enveloppe définissant une chambre de production thermique et une chambre de transfert thermique adjacente à la chambre de production thermique et séparée de celle-ci par l'intermédiaire d'une paroi. Un rotor commandé par un arbre tournant est animé d'un mouvement de rotation à l'intérieur de la chambre de production thermique. Un fluide visqueux est maintenu dans l'écartement entre la surface des parois internes de la chambre de production thermique et la surface externe du rotor aux fins de production de chaleur sous l'effet de la contrainte tangentielle produite par la rotation du rotor. Un fluide échangeur de chaleur circule à l'intérieur de la chambre de transfert thermique pour recevoir la chaleur transférée à travers la paroi de la chambre de production thermique. Une pluralité de rainures sont formées sur au moins une des surfaces internes de la chambre de production thermique afin d'augmenter la superficie totale de la surface de transfert thermique et accroître ainsi l'efficacité du transfert thermique d'une chambre à l'autre. La densité de la configuration des rainures est plus importante dans la région périphérique de la surface interne.

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