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Project Title

Effect of a Variable Speed Drive (VSD) on the Indoor Fan of a Commercial Roof Top Unit (RTU)

Project Number PGE 0713 Organization PG&E Sector Other Project Year(s) 2007 - N/A
Description

Project Summary

This Commercial air conditioning rooftop units (RTUs) are typically implemented as single zone, constant volume systems that cycle in response to a thermostat signal. Much of the energy used by the RTU is needed to power an indoor fan. (Fan power is roughly a function of the cube of the fan speed or airflow.) This project examines the effects and opportunities available from installing a variable speed drive (VSD) on the indoor fan to reduce demand by lowering fan speed. For more information, please contact the sponsoring organization.

  • Pacific Gas & Electric Company logo
  • Southern California Edison Company logo
  • Southern California Gas Company logo
  • San Diego Gas & Electric Company logo
  • Sacramento Municipal Utility District logo
  • Los Angeles Department of Water and Power logo
  • CEC logo

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The ETCC is funded in part by ratepayer dollars and the California IOU Emerging Technologies Program, the IOU Codes & Standards Planning & Coordination Subprograms, and the Demand Response Emerging Technologies (DRET) Collaborative programs under the auspices of the California Public Utilities Commission. The municipal portion of this program is funded and administered by Sacramento Municipal Utility District and Los Angeles Department of Water and Power.