Energy at Duke University
Duke University provides electricity, steam for heating, and chilled water for cooling buildings around campus. The steam and chilled water are produced on campus by Duke’s two steam plants and two chilled water plants. Nearly all electricity used on campus is purchased from Duke Energy, North Carolina’s main electricity provider. The University’s annual energy use is almost evenly split between electricity and natural gas. All energy used on campus accounts for nearly 65% of total campus greenhouse gas (GHG) emissions as seen in the chart below.
Due to the large impact of energy use on campus, Duke’s Facilities Management Department has emphasized sustainability goals in its work, which has led to a 36% reduction, nearly 100,000 metric tons, in energy-related GHG emissions since 2007.
To accomplish the nearly 40% decrease in energy emissions, Duke has worked aggressively to increase the efficiency of campus buildings, educate the Duke community about ways to reduce their energy use, and upgrade central heating and cooling plants.
Steam on campus used to be generated mostly through the burning of coal in Duke’s steam plants. In 2011, Duke ended the use of coal in on-campus steam plants leading to a large decrease in energy emissions. Today, the steam plants now combust natural gas, with the hopes to convert steam generation to biogas in the future.
Buildings on campus are always being looked at to find ways to reduce their energy use. With tweaks to heating and cooling needs, upgrades to lighting fixtures, and installment of more efficient equipment, Duke has increased building efficiency by 12%. Most recently, with the help of students from the Pratt School of Engineering and Facilities Management Department, Hudson Hall is piloting an LED retrofit project, which is estimated to save hundreds of thousands of dollars over the next 10 years.
Future of Energy at Duke
As Duke University continues work on its Climate Action Plan, the focus for the 2016-17 academic year was updating the energy portion of the CAP, including reviewing progress to-date, changes to assumptions that impact emissions, and consideration of new technologies, initiatives, and policies that could allow for even more aggressive on-campus reductions.
Duke will build upon the reductions in energy emissions achieved since 2007 and aggressively pursue energy efficiency strategies in new and existing buildings, central utility improvements and renewable energy technologies where feasible. Duke will continue to reduce energy-related emissions on campus with strategies such as expanding LED lighting upgrades, building HVAC optimization, chilled water system improvements, hot water conversion and renewables such as solar thermal.
Duke University continues to explore the possibility of using biogas from swine farms in N.C. as a means of reducing its reliance on fossil fuels and meeting its ambitious goal of becoming climate neutral by 2024. This innovative approach could create an untapped market for biogas with broader environmental and economic benefits for the state.