High capacity chiller compressor

F - Mech Eng,Light,Heat,Weapons – 25 – B

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Details

F25B 41/00 (2006.01) F04B 39/06 (2006.01) F04B 53/08 (2006.01) F04D 29/42 (2006.01) F04D 29/58 (2006.01) F04D 29/66 (2006.01)

Patent

CA 2717871

A high efficiency, low mainte-nance single stage or multi-stage centrifugal compressor assembly for large cooling installa-tions. A cooling system provides direct, two--phase cooling of the rotor by combining gas re-frigerant from the evaporator section with liquid refrigerant from the condenser section to affect a liquid / vapor refrigerant mixture. Cooling of the stator with liquid refrigerant may be provid-ed by a similar technique. A noise suppression system is provided by injecting liquid refriger-ant spray at points between the impeller and the condenser section. The liquid refrigerant may be sourced from high pressure liquid refrigerant from the condenser section.

Linvention concerne un ensemble de compresseur centrifuge monoétage ou multiétage de haut rendement et de faible maintenance pour de grandes installations de refroidissement. Un système de refroidissement assure un refroidissement direct à deux phases du rotor en combinant un réfrigérant gazeux provenant de la section dévaporateur avec un réfrigérant liquide provenant de la section condenseur pour réaliser un mélange réfrigérant liquide/vapeur. Un refroidissement du stator avec le réfrigérant liquide peut être assuré par une technique similaire. Un système de suppression de bruit est assuré en injectant une pulvérisation de réfrigérant liquide en des points entre lhélice et la section de condenseur. Le réfrigérant liquide peut prendre sa source dun réfrigérant liquide haute pression provenant de la section de condenseur.

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