Sequencing of variable speed compressors in a chilled liquid...

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

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F25B 7/00 (2006.01)

Patent

CA 2751074

An improved method for sequencing variable speed centrifugal compressors on and off line to ensure optimal operating efficiency in a liquid cooling system under all operating circumstances is described. The present disclosure teaches modifying equipment sequencing decisions (to add or shed a unit), based in part on the position of the compressor inlet vanes. This new approach achieves improved energy efficiency of the overall system by taking into account operating conditions of individual compressors or chillers that may be sub-optimal.

L'invention porte sur un procédé amélioré pour le séquencement de compresseurs centrifuges à vitesses variables en ligne et hors ligne pour assurer un rendement de fonctionnement optimal dans un système de refroidissement par liquide dans toutes les circonstances de fonctionnement. La présente divulgation enseigne la modification des décisions de séquencement d'équipement (pour ajouter ou ôter une unité), sur la base en partie de la position des aubes d'entrée du compresseur. Cette nouvelle approche permet d'obtenir un rendement énergétique amélioré du système global par la prise en compte des conditions de fonctionnement des compresseurs ou refroidisseurs individuels qui peuvent être sous-optimales.

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