SESI followed a design/build approach to accelerate the implementation and generate savings, which result from the greater efficiency, optimal control, and the reduction in the simultaneous overcooling/reheating that would result from the rebalancing of the existing stack air-handling units of the chiller plant, according to the company. "The new plant houses two premium-efficiency chillers that are driven by electric motors and variable-speed drives," said Wesley Burns, SESI project manager.
A pre-fabricated pump skid that incorporates variable-primary pumping and associated controls delivers the chilled water. All of the motors in the plant are high efficiency and are variable-speed-drive controlled. The distributed control system selects the proper combination of chillers, pumps, and tower fans, operating the plant as efficiently as possible.
"The new chiller plant is more adequately sized for the anticipated loads on the building and will operate more efficiently than the previous central plant equipment, particularly at part-load conditions," said Burns.
Publication date: 12/05/2005