Stirling engine

Details Stirling engine Stirling engine

F - Mech Eng,Light,Heat,Weapons

02

G

F02G 1/055 (2006.01)

Patent

CA 2250224

The object of the invention is to optimize the energy balances for a Stirling engine comprising a heated cylinder head having a plurality of approximately U-shaped heater pipes and a cooler. In particular the invention should provide a solution by means of which the transmission of heat to the heater pipes and the performance of the cooler are improved. To that end, the outwardly directed partial pipes (4c) of the heater pipes (4) through which the working medium flows are provided at least in given regions with a ceramic backing (11) for optimizing the flow (10) of hot gases. The cooler takes the form of a light metal body (20) around which coolant flows, which has radial ribs (23) and is disposed in a pot-like housing (21), the spacing between the radial ribs (23) being larger than the gap (25) between the inner wall of the pot and the outer radial rib delimiting wall.

L'objectif de l'invention est d'optimiser les bilans énergétiques dans un moteur Stirling comprenant une tête de cylindre chauffée possèdant une pluralité de tuyaux de chauffage en forme de U et un dispositif de refroidissement. En particulier, l'invention doit offrir une solution permettant d'améliorer la transmission de chaleur aux tuyaux de chauffage et les performances du dispositif de refroidissement. A cet effet, les tuyaux partiels (4c), dirigés vers l'extérieur, des tuyaux de chauffage (4) à travers lesquels le fluide de travail s'écoule, sont pourvus, au moins dans certaines zones, d'un renfort en céramique (11) servant à optimiser l'écoulement (10) des gaz chauds. Le dispositif de refroidissement se présente sous la forme d'un corps (20) en métal léger autour duquel s'écoule le fluide de refroidissement, qui présente les nervures (23) radiales et est disposé dans un boîtier (21) en forme de pot, l'écartement entre les nervures (23) radiales étant plus grand que l'espace (25) séparant la paroi intérieure du pot de la paroi extérieure délimitant les nervures radiales.

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