Energy and water are among NC State’s most necessary and costly expenses. For more than a decade, the university’s campus-wide energy management strategies have enabled significant conservation of vital fiscal and environmental resources. The Annual Energy and Water Report provides an update on campus progress toward utility reductions, highlights specific projects and outlines strategies for the next fiscal year that will contribute to further reductions.
Total energy consumption per gross square foot peaked in 2008-2009 and has trended downward since. Compared to the fiscal year 2002-2003 baseline, this energy use intensity (EUI) has decreased by 31%.
In fiscal year 2016, NC State began utilizing reuse water supplied by the City of Raleigh on Centennial Campus. Reuse water, sometimes called reclaimed water or non-potable water, is wastewater treated to a high standard and reused instead of being discharged into a waterway. Reuse water provides a cost-effective and drought resistant supply of water for cooling towers, irrigation and toilet flushing. For total water consumption (potable and reuse), fiscal year 2018 marked a level 48% below the 2001-2002 baseline. Potable water consumption alone has decreased by 53%.
Fiscal Year 2017-2018 Highlights
The following are highlights and accomplishments of energy efficiency strategies and energy-related projects implemented on campus during fiscal year 2017-2018 (download the complete report):
Through collaboration among business units within the Facilities Division, Energy Management compiled the fiscal year 2018 Reinvestment Act claim for more than $3.8 million in energy savings. The Reinvestment Act of 2010, also known as NC House Bill 1292, allows NC institutions to capture a portion of energy and water savings for reinvestment in future conservation projects.
Energy Management successfully funded more than $1.3 million of campus energy projects that result in annual savings of $250,000. Multiple projects ranging from lighting upgrades to building controls improvements were completed through cost-sharing programs with campus partners.
Design is complete on Thermal Energy Storage (TES) at the Centennial Campus Central Utility Plant, and construction is scheduled to begin in fiscal year 2019. TES will store 3.4 million gallons of chilled water, offsetting the need to operate electrically driven chillers during on-peak hours. This reduces electrical expenses.
NC State purchased the Centennial Campus electric substation from Duke Energy Progress. Owning the substation allows NC State to purchase electricity at a reduced rate. This rate reduction saved NC State $130,000 in transmission costs during fiscal year 2018.
Construction is complete and NC State will soon take ownership of the Combined Heat and Power project in the Centennial Campus Central Utility Plant. This project will generate nearly $1.6 million in annual savings and is funded through NC State’s fourth energy performance contract.
The Facilities Division Commissioning Team’s work continues to improve the efficiency of campus buildings through mechanical equipment calibrations, sequence adjustments and schedule implementations. The Commissioning Team’s cumulative utility savings is more than $1 million.