Strategic Energy and Water Annual Report

Transcription

1 Strategic Energy and Water Annual Report fiscal year 2016

2 2 NORTH CAROLINA STATE UNIVERSITY INTRODUCTION Energy and water are among NC State s most necessary and costly expenses. For more than a decade, NC State s energy management strategies have helped the university conserve vital fiscal and environmental resources. These efficiency strategies are successfully reducing the environmental impact of campus while enabling the university to progress toward utility reduction goals. This report serves as an update on progress toward utility reductions and outlines strategies for the next fiscal year that will contribute to further reductions. HIGHLIGHTS The following are highlights and accomplishments of energy efficiency strategies implemented on campus during fiscal year 2016: Implementation of enhancements in utility meter data collection and utility billing software systems, along with process improvements to reduce potential billing errors. Through collaboration among business units within Facilities Operations, Energy Management compiled the fiscal year 2016 Reinvestment Act claim for more than $2.6 million in energy savings. The university s fourth energy performance contract progressed through the programming phase to determine feasibility of combined heat and power (CHP) technology on Centennial Campus. Construction is set to begin in spring Development of a Curtailment Operations Planning application provides a decision-making tool to determine the lowest cost option for providing steam and electricity to north and central campus during times when natural gas is curtailed. Tune-ups of all the boilers in district utility plants allowed for increased heat transfer, resulting in efficiency increases. Energy Management successfully funded more than $650,000 of energy conservation measures on campus, in part through cost sharing programs with campus partners. Efficiency measures included lighting upgrades, improvements to steam systems and building control upgrades

3 2016 Strategic Energy and Water Annual Report 3 Energy Projects Completed During Fiscal Year 2016 PROJECT LED Site Lighting BUILDING(S) Centennial Biomedical Campus ESTIMATED COST $125,259 ESTIMATED Annual cost avoided $12,206 Boiler Tune-ups District Utility Plants $25,300 $27,130 Steam Trap Replacement Program District Utility Plants $2,600 $9,479 Steam Trap Insulation Jackets Fox Labs, College of Textiles and Engineering Building II $47,331 $15,500 Control System Upgrade Phase III D.H. Hill Library $285,000 $67,632 Control System Upgrade Weaver Labs $116,000 $24,510 Hot Water Heater Replacements Biltmore Hall and Biological Research Facility $46,769 $13,663 Projects Planned For Fiscal Year 2017 PROJECT Boiler Tune-ups BUILDING(S) District Utility Plants ESTIMATED COST $25,000 ESTIMATED annual Cost Avoided $10,000 Steam Trap Program District Utility Plants and Distribution System $15,000 $12,000 Steam/Chilled Water System Insulation Campus-wide $60,000 $15,000 Cooling Tower Replacement David Clark Labs $60,000 $20,000 Solar PV Control System Upgrade Carmichael Gymnasium $30,000 $7,500 Building Control System Upgrade Phase II Weaver Labs $180,000 $24,510 LED Lighting Upgrade TBD $50,000 $7,273 CTG Inlet Cooling Water Reuse Cates Steam Plant $10,000 $10,000 HEPA Filters for CTGs Cates Steam Plant $16,384 $180,000 CHP on Centennial Campus EPC Centennial Central Utility Plant TBD TBD BEFORE AFTER LED site-lighting upgrades cut outdoor lighting costs in half on Centennial Biomedical Campus while improving lighting quality.

4 4 NORTH CAROLINA STATE UNIVERSITY ENERGY Campus energy consumption peaked in and has declined steadily since. Compared to the fiscal year baseline, total energy consumption per gross square foot (GSF) decreased by 33 percent (see Figure 1). Figure 1: Energy Consumption per GSF* 180, ,000 energy consumption (btu/gsf) 160, , , , ,000 REDUCTION: 115,692 BTU/GSF 33% 110, fiscal year *Combined Heat and Power Adjustment Methodology: NC State purchases electricity, natural gas, fuel oil, and potable and reuse water from third parties. Electricity is also generated on campus using an 11-megawatt (MW) combined heat and power (CHP) system. CHP increases fuel use for on-site power generation, decreases fuel use for boilers and decreases grid electricity (or source energy) purchases. The methodology for reporting the benefits garnered through the operation of the CHP follows the U.S. Department of Energy s (DOE) measurement protocol outlined by the Federal Energy Management Program (FEMP) in Reporting Guidance for Federal Agency Annual Report on Energy Management issued September The purpose of the adjustment is to not penalize organizations under the site energy-based performance metric for implementing cost-effective projects where source energy decreases but site-delivered energy increases.

5 2016 Strategic Energy and Water Annual Report 5 WATER NC State began utilizing reuse water supplied by the City of Raleigh on Centennial Campus toward the end of the fiscal year. Reuse water provides a more cost-effective supply of water for cooling towers, irrigation and toilet flushing. NC State maintained a 50 percent reduction, as compared to baseline, in total water consumption (potable and reuse). The rate of potable water consumption showed a 52 percent reduction (see Figure 2) Figure 2: Water Consumption per GSF 1 CCF = 748 GALLONS.0650 baseline.0600 water consumption (ccf/gsf) *REDUCTION reached: total campus water 50% Total potable water 52% fiscal year *With the addition of a reuse waterline on Centennial Campus, this is the first year that NC State used nonpotable water. Total campus water use and potable water use will be tracked separately beginning this year. A new HEPA filter was installed in one of two combustion turbine generators during scheduled maintenance on the CHP system. The filter reduces degradation in performance, resulting in increased electrical output that paid for the cost of the $16,384 filter in less than two months. NC State avoided $288,990 in utility costs during winter break. Since the Winter Holiday Energy Savings Initiative began in 2004, more than $3 million in utility costs have been avoided.

6 6 NORTH CAROLINA STATE UNIVERSITY PROGRESS Energy consumption per gross square foot was reduced by 33 percent from the baseline, following an 8-year trend of decreasing the energy consumption rate. Total utility cost per square foot, which has also shown a general decline over this period, dropped to $1.78 per square foot, 10 percent lower than the baseline. Energy efficiency efforts coupled with historically low natural gas prices, a relatively mild winter with no periods of natural gas curtailment, and the strategic purchasing of natural gas all contributed to the reduction in utility costs this fiscal year. TABLE 1: KEY PERFORMANCE INDICATORS Indicates Baseline Unit of Measurement YR CHANGE CHANGE FROM BASELINE Utility Cost (GSF) - $1.98* $2.14 $2.05 $2.18 $1.99 $ % -10% Energy Cost ($/GSF) - $1.87* $1.92 $1.83 $1.93 $1.74 $ % -19% Energy Consumption (BTU/GSF) - 171, , , , , ,692-6% -33% Water Cost ($/GSF) $0.119* $0.106 $0.23 $0.22 $0.25 $0.24 $0.26 8% 119% Potable Water Consumption (CCF/GSF) 0.066* % -52% Total Water Consumption (CCF/GSF) 0.066* % -50% Campus Area (GSF) 9,796,638* 9,910,619* 14,164,153 14,453,596 14,966,918 15,144,558 15,119,248 0% 53% Figure 3: UTILITY COST per GSF $3.00 $2.50 $2.00 $1.50 fiscal year:

7 2016 Strategic Energy and Water Annual Report 7 Figure 4 illustrates the university s growth and total energy consumption over time, demonstrating that the university is making significant progress in energy consumption reduction through energy efficiency strategies and efforts by the campus community. Figure 4: Total Energy Consumption (BTU/GSF) and Campus Growth (GSF) 190,000 16,000,000 BTUs/GSF 180, , , , , , , ,000 ENERGY CONSUMPTION CAMPUS GROWTH 15,000,000 14,000,000 13,000,000 12,000,000 11,000,000 10,000,000 9,000,000 GROSS SQUARE FEET OF CAMPUS BUILDINGS (GSF) fiscal year NC State installed a reuse water pipeline, which will reduce potable water use and provide a more cost-effective water supply for utility cooling towers, toilet flushing at Hunt Library and irrigation on Centennial Campus. The strategic classroom and HVAC scheduling initiative avoided $87,000 in energy costs during summer academic sessions in 2015.

8 View the Annual Energy and Water Report online go.ncsu.edu/energywaterreport Strategic Energy and Water Annual Report is produced by NC State Energy Management ncsu.edu/energy