CHICAGO, IL — The Hartford Office Plaza has recently undergone a chiller plant makeover. Designed to provide energy source flexibility, enhanced tenant comfort, reduced operating costs, and a capacity to accommodate the unique hvac requirements of its tenants, the replacement chiller plant takes advantage of existing permits using the Chicago River for condenser cooling, utilizing two Trane centrifugal chillers and a single-stage absorption chiller.
Chiller plant centralization required steam, condenser water, and chilled water lines to be routed to the new chillers with new electric power. Steam to the Trane single-stage absorption machine is delivered at 12 psig from gas boilers. The electric service to the centrifugal machines is at 480V.