DEMAND SIDE ENERGY MANAGEMENT
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Variable Speed Drives (VSDs)/Variable Frequency Drives (VFDs) Although most small retail stores don't utilize variable speed drives, for Large and Medium size businesses, the advancements in VSD/VFD technologies have made it possible to improve the efficiencies of HVAC systems virtually across the board.
The newer multi-zone package units have drives for their supply fans on-board, and allow for efficiencies on DX units that were not available just a few years ago.
Drives are commonplace on supply fans for chilled water systems, but there are significant energy and operational savings to be had for installing them on condenser pumps, chilled water pumps, cooling tower fan motors, and exhaust fans. The most efficient operation of these units in conjunction with a well thought out sequence of operation requires an EMS/BAS to manage continuous efficient operating conditions.
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