Patent ID: 8275483

Claim:
A method for efficient operation of a chilled water plant comprising: identifying a pre-determined chilled water Delta T; setting a chilled water Delta T based on the pre-determined chilled water Delta T, the chilled water Delta T comprising a chilled water entering temperature and a chilled water leaving temperature at one or more components of the chilled water plant; controlling chilled water flow rate through the one or more components to maintain the chilled water Delta T across the one or more components, wherein the chilled water flow rate is controlled by one or more chilled water pumps; and performing a critical zone reset to adjust the chilled water Delta T when one or more triggering events occur, wherein the chilled water Delta T is reset by an action selected from the group consisting of adjusting the chilled water entering temperature and adjusting the chilled water leaving temperature; wherein the control of chilled water flow rate through the one or more components to maintain the chilled water Delta T reduces Low Delta T Syndrome at the chilled water plant.