Strategic energy and Water annual reportfiscal year 2016

2 NOrTH carOliNa sTaTe UNiVersiTy

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.

introduction

HigHligHtSThe 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.

Tune-ups of all the boilers in district utility plants allowed for increased heat transfer, resulting in efficiency increases.

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.

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 2017.

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

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.

3BE

FORE

AFTE

R

2016 sTraTegic eNergy aND WaTer aNNUal rePOrT

Boiler Tune-ups

steam Trap Program

steam/chilled Water system insulation

cooling Tower replacement

solar PV control system Upgrade

Building control system Upgrade Phase ii

leD lighting Upgrade

cTg inlet cooling Water reuse

HePa filters for cTgs

cHP on centennial campus ePc

District Utility Plants

District Utility Plants and Distribution system

campus-wide

David clark labs

carmichael gymnasium

Weaver labs

TBD

cates steam Plant

cates steam Plant

centennial central Utility Plant

$25,000

$15,000

$60,000

$60,000

$30,000

$180,000

$50,000

$10,000

$16,384

TBD

$10,000

$12,000

$15,000

$20,000

$7,500

$24,510

$7,273

$10,000

$180,000

TBD

projectS planned For FiScal year 2017

project Building(S)eStiMated coSt

eStiMated annual coSt avoided

leD site lighting

Boiler Tune-ups

steam Trap replacement Program

steam Trap insulation Jackets

control system Upgrade Phase iii

control system Upgrade

Hot Water Heater replacements

centennial Biomedical campus

District Utility Plants

District Utility Plants

fox labs, college of Textiles and engineering Building ii

D.H. Hill library

Weaver labs

Biltmore Hall and Biological research facility

$125,259

$25,300

$2,600

$47,331

$285,000

$116,000

$46,769

$12,206

$27,130

$9,479

$15,500

$67,632

$24,510

$13,663

energy projectS coMpleted during FiScal year 2016

project Building(S)eStiMated coSt

eStiMated annual coSt avoided

SucceSS Story

LED site-lighting upgrades cut outdoor lighting costs in half on Centennial Biomedical Campus while improving lighting quality.

4

180,000

170,000

160,000

150,000

140,000

130,000

120,000

110,000

Figure 1: energy conSuMption per gSF*

REDUCTION:

33%115,692BTU/gsf

2002

-03

2003

-04

2004

-05

2005

-06

2006

-07

2007

-08

2008

-09

2009

-10

2010

-11

2011

-12

2012

-13

2013

-14

2014

-15

FIsCAL yEAR

ENER

gy C

ONsU

mpT

ION

(BTU

/gsF

)

2015

-16

NOrTH carOliNa sTaTe UNiVersiTy

*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 2015. 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.

energycampus energy consumption peaked in 2008-2009 and has declined steadily since. compared to the fiscal year 2002-03 baseline, total energy consumption per gross square foot (gsf) decreased by 33 percent (see figure 1).

5

Figure 2: Water conSuMption per gSF

.0700

.0650

.0600

.0550

.0500

.0450

.0400

.0350

.0300

2002

-03

2003

-04

2004

-05

2005

-06

2006

-07

2007

-08

2008

-09

2009

-10

2010

-11

2011

-12

2012

-13

2013

-14

2014

-15

2001

-02

*REDUCTION reacHed:

50%TOTal caMPUs WaTer

FIsCAL yEAR

wAT

ER C

ONsU

mpT

ION

(CCF

/gsF

)

1 CCF = 748 gALLONs

2015

-16

52%TOTal POTaBle WaTer

BaseliNe

2016 sTraTegic eNergy aND WaTer aNNUal rePOrT

WaterNc 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).

SucceSS Story

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.

SucceSS Story

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.

*With the addition of a reuse waterline on centennial campus, this is the first year that Nc state used non-potable water. Total campus water use and potable water use will be tracked separately beginning this year.

6

taBle 1: Key perForMance indicatorS

unit oF MeaSureMent

Utility Cost (gsF)

2002

-

-

-

$0.119*

0.066*

0.066*

9,796,638*

2003

$1.98*

$1.87*

171,810

$0.106

0.054

0.054

9,910,619*

2012

$2.14

$1.92

149,227

$0.23

0.038

0.038

14,164,153

2013

$2.05

$1.83

132,331

$0.22

0.034

0.034

14,453,596

2014

$2.18

$1.93

128,518

$0.25

0.034

0.034

14,966,918

2015

$1.99

$1.74

123,115

$0.24

0.033

0.033

15,144,558

2016

$1.78

$1.52

115,692

$0.26

0.032

0.033

15,119,248

1yr cHange

-11%

-13%

-6%

8%

-3%

0%

0%

cHange FroM BaSeline

-10%

-19%

-33%

119%

-52%

-50%

53%

Indicates Baseline

Figure 3: utility coSt per gSF

2002

-03

2003

-04

2004

-05

2005

-06

2006

-07

2007

-08

2008

-09

2009

-10

2010

-11

2011

-12

2012

-13

2013

-14

2014

-15

$3.00

$2.50

$2.00

$1.50

FIsCAL yEAR:

Campus Area (gsF)

Total water Consumption (CCF/gsF)

potable water Consumption (CCF/gsF)

water Cost ($/gsF)

Energy Consumption(BTU/gsF)

Energy Cost ($/gsF)

2015

-16

NOrTH carOliNa sTaTe UNiVersiTy

progreSSenergy consumption per gross square foot was reduced by 33 percent from the 2002-2003 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.

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Figure 4: total energy conSuMption (Btu/gSF) and caMpuS groWtH (gSF)

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.

190,000

180,000

170,000

160,000

150,000

140,000

130,000

120,000

110,000

16,000,000

15,000,000

14,000,000

13,000,000

12,000,000

11,000,000

10,000,000

9,000,000

2002

-03

2003

-04

2004

-05

2005

-06

2006

-07

2007

-08

2008

-09

2009

-10

2010

-11

2011

-12

2012

-13

2013

-14

2014

-15

BTUs

/gsF

gROss sQUARE FEET OF CAmpUs BUILDIN

gs (gsF)

CAMPUS GROWTH

ENERGY CONSUMPTION

FIsCAL yEAR

2015

-16

2016 sTraTegic eNergy aND WaTer aNNUal rePOrT

SucceSS Story

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.

SucceSS Story

The strategic classroom and HVAC scheduling initiative avoided $87,000 in energy costs during summer academic sessions in 2015.

View the annual energy and Water report onlinego.ncsu.edu/energyWaterreport

sTRATEgIC ENERgy AND wATER ANNUAL REpORT Is pRODUCED By NC sTATE ENERgy mANAgEmENT

ncsu.edu/energysave-energy@ncsu.edu