Report Number




HVAC; Buildings


Rapidly increasing requirements placed on utilities to reduce peak loads has led to utility customer incentives to shift peak demand to non-peak times or reduce peak loads when notified by the utility that the grid is close to capacity. This study investigates methods used to reduce building demand during a fixed time window near a utilities on-peak period. The window was chosen to be 5-9 A.M. in winter and 2-5 P.M. in summer.The most common methods for reducing building peak demand were reviewed and categorized by their usefulness and wide-spread availability. These strategies were reductions in lighting power density, global thermostat set point setback control, chilled water temperature reset, and altering the supply air temperature reset. The first two control strategies are applied to all building types, while the last two control strategies are applied to the buildings served by a central plant. Computer simulations were performed to determine the savings potential when these strategies were used either individually or in combination. The buildings selected for this study were obtained from the computer simulation reference buildings provided by the United States Department of Energy (DOE). This study included small, medium, and large representations of the office and retail building types. The energy characteristics were selected to meet the minimum for those building types according to ASHRAE Standards 90.1-2004 and 62.1-2004.

Date Published



Buildings - HVAC



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In Copyright