Control method for a cryogenic unit

Details Control method for a cryogenic unit Control method for a cryogenic unit

F - Mech Eng,Light,Heat,Weapons

17

C

F17C 9/04 (2006.01) B60H 1/32 (2006.01) F25B 29/00 (2006.01) F25D 3/10 (2006.01) F25D 17/06 (2006.01) F25B 27/00 (2006.01)

Patent

CA 2295562

Apparatus and methods for improving efficiency of a temperature conditioning system which employs a cryogenic liquid. A vapor powered ventilation motor (68) is normally powered by vapor from the low pressure end of the evaporation coils (62, 64). However, supplemental vapor (72) is provided at start-up to provide immediate ventilation. In addition, vapor which bleeds off valves is cycled through the vapor powered motor (68) or used to maintain a slight positive pressure when the system is shut down.

Appareil et procédés permettant d'améliorer l'efficacité d'un système de conditionnement d'air dans laquelle un liquide cryogénique est utilisé. Un moteur de ventilation à vapeur (68) fonctionne normalement avec la vapeur provenant de l'extrémité basse pression des bobines d'évaporation (62, 64). Néanmoins, de la vapeur d'appoint (72) est fournie lors du démarrage de sorte qu'une ventilation immédiate soit assurée. De plus, la vapeur qui sort des soupapes est renvoyée dans le moteur à vapeur (68) ou est utilisée pour le maintien d'un pression légèrement positive lorsque le système est arrêté.

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