Power recovery machine

F - Mech Eng,Light,Heat,Weapons – 01 – D

Patent

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Details

F01D 3/04 (2006.01) F01D 5/08 (2006.01) F01D 11/02 (2006.01) F01D 15/10 (2006.01) F01D 25/12 (2006.01) F02C 1/02 (2006.01) F02C 7/08 (2006.01)

Patent

CA 2663247

A machine for recovering power from a flow of compressed gas, for example, natural gas comprises, firstly, a turbo-expander 2 having a turbo-expander wheel 6 and, secondly, a generator 4 having a rotor 10 able to be driven by the turbo-expander wheel 6 and a stator 12 about the rotor 10. The turbo- expander 2 and the generator 4 are housed in a length of pipe 14. The turbo- expander wheel 6 has an obverse side 7 facing the generator 4. There is a flow passage 42 for the flow of expanded gas that places the obverse side 7 of the wheel 6 in gas flow communication with the outer surface of the stator 12. This outer surface typically carries fins 44 to facilitate cooling of the stator 12 by expanded gas from the turbo-expander 2.

L'invention concerne une machine pour récupérer de l'énergie d'un écoulement de gaz comprimé, par exemple, un gaz naturel. Ladite machine comporte premièrement, un turbo-détendeur 2 muni d'une roue 6 de turbo-détendeur ; deuxièmement, un générateur 4 muni d'un rotor 10 pouvant être entraîné par la roue 6 de turbo-détendeur et muni d'un stator 12 entourant le rotor 10. Le turbo-détendeur 2 et le générateur 4 sont reçus dans une longueur de tuyau 14. La roue 6 de turbo-détendeur présente un côté face 7 tourné vers le générateur 4. Un passage d'écoulement 42 pour l'écoulement du gaz détendu place le côté face 7 de la roue 6 en communication d'écoulement gazeux avec la surface externe du stator 12. Cette surface externe porte typiquement des ailettes 44 pour faciliter le refroidissement du stator 12 par le gaz détendu provenant du turbo-détendeur 2.

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