Toronto General Hospital, Toronto

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Toronto General Hospital is an acute care and teaching hospital with over two million square feet, located in Toronto, Ontario.

The TGH central chilled water plant provides chilled water to HVAC and process loads throughout the hospital via seven chilled water risers. To enhance the capacity, redundancy, resiliency, efficiency, and to reduce utility costs, the chiller plant was upgraded prior to the 2018 peak cooling season. The main feature of the upgrade was converting the plant to run primarily on the Enwave deep lake district cooling system.

The upgrade included:

Installing four 1500 Ton heat exchangers to connect to the Enwave deep lake district cooling system
Installing one new 1500 Ton magnetic bearing chiller
Installing five new primary chilled water pumps to replace the existing pumps
Installing a new side stream chilled water and condenser water pump
Installing a controlled bypass on the condenser water system to allow circulation of treated water
Installing new metering, valves, and sensors

Updating of the chilled water plant controls included emergency power operation, switchover to the backup plant, automatic sequencing of the backup plant, automatic sequencing of the new plant, chillers, primary pumps, secondary pumps, and control valves: Refurbishing the central plant control room with new monitors and workstations, removing a 2400 Ton centrifugal chiller (25degF dT chiller), removing a 1400 Ton single acting absorption chiller.

Toronto General Hospital, Toronto

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