Cogeneration method and device using a gas turbine...

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

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F02C 3/00 (2006.01) F02C 6/00 (2006.01)

Patent

CA 2518460

The invention relates to a cogeneration method and device using a turbine, such as a gas turbine, comprising a compression section (14), at least one expansion section (18, 52, 96) and a combustion chamber (20). The inventive method comprises the following steps consisting in: compressing an oxidiser comprising oxygen in the compression section (14); in the combustion chamber (20), performing a step involving the pressurised combustion of a mixture comprising the compressed oxidiser and a fuel; using at least one part of the hot gases produced by the pressurised combustion in order to perform an exchange with an external installation (34, 70); and performing at least one step involving the post-combustion of a mixture of the hot gases, which were produced by the aforementioned exchange, and a fuel, such as to obtain hot gases which are conveyed to the expansion section (18, 52, 96) under temperature and pressure conditions similar to those used in the absence of an exchange.

La présente invention concerne un procédé et un dispositif de cogénération par turbine, notamment de turbine à gaz, comprenant une section de compression (14), au moins une section de détente (18, 52, 96) et une chambre de combustion (20). Selon le procédé de l'invention, on comprime un comburant comprenant de l'oxygène dans la section de compression' (14); on réalise, dans la chambre de combustion (20), une étape de combustion sous pression d'un mélange du comburant comprimé avec un combustible; on utilise au moins une partie des gaz chauds obtenus par la combustion sous pression pour réaliser un échange avec une installation externe (34, 70) et on réalise au moins une étape de postcombustion d'un mélange des gaz chauds, issus de l'échange, avec un combustible, de façon à obtenir des gaz chauds qui sont envoyés à la section de détente (18, 52, 96), dans des conditions de température et de pression proches des conditions réalisées en l'absence d'échange.

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