Baseline Conditions

The existing central plant housed three steam watertube boilers that provided steam for heat, power, and cooling. Their original full capacity rating was 115,000 lbm/h (52,000 kg/h), but they were operated at up to 90,000 lbm/h (41,000 kg/h) at 250 psig/500°F (18 bar/260°C) and had limited environmental controls. The plant also included a cogeneration system consisting of two extraction/condensing turbine generators. The 250 psig (18 bar) header also supplied three 2,500 ton (8,790 kW^) steam turbine-driven centrifugal chillers. Steam turbines were also used to drive boiler feed pumps and draft fans.

There was insufficient on-site electric generation capacity to support the entire facility in the event of a utility outage. There was also a deficiency in chilled water capacity, given the load growth experienced over the past decade, including the addition of a new research facility.

There was an old central pneumatic and partially upgraded DDC EMCS that provided some measure of control over the HVAC system. However, it required both upgrade and expansion. The central plant was largely dependent on manual or equipment-specific automated controls.

There were about 5,000 hp (3,728 kWm) of standard-efficiency motors, none of which operated under variable speed. The lighting system was old and inefficient, with over-lighting in some locations and inadequate lighting in others.

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