Energy EfficiencyFuture Plans

OverviewBiomass UpdateClimate Commitment UpdateECMESPCDashboardDeferred MaintenanceSupply Side Conservation

Biomass UpdateAugust 9 – received bids for test fuel

Carolina Wood Pellets selected520 tons purchased

August 31-September 1 – 20 tons to be deliveredPlan to burn the week after receiptDemonstrate suitability of feeding the fuel through the

existing coal handling and fuel feeding systemsBoiler maintenance outage

Document interior conditionInstall test portsInstall test ports and a fire detection/supression system

in ductwork going to the baghouseOptimize combustion fuel and air to optimize efficiency

Biomass UpdateEarly November – additional 500 tons

deliveredTest burn, expected to take 2 weeksVary fuel flow percentage of biomassCollect extensive test data at various load

points on the boilerMeasure efficiency and performanceUnderstand boiler operating characteristics

when cofiringMeasure stack gas emissions

Spring 2011 – Potential torrified wood test, dependent upon availability

Climate Commitment Update

120,000 metric ton reduction, back to 2003 levelFrom 30.6 to 24.6 total emissions per square foot

ECM Success 09-10Funds spent = $212,222

Annualized savings = $5-6 million

Equivalent to $68 million investment by ESCO

ECM Plans$200,000 annual budget

Remaining T12 lighting, survey and preliminary design for Kenan Center

Ductwork modifications in Global Education and Chapman

Matching portion of $865,843 in ARRA projects for lighting and HVAC

$100,000 supplemental (potential)Steam trap survey and replacementHVAC controls Wilson LibraryVariable speed drives Phillips and BeardPreliminary design, heat recovery, MBRB

Sta

te U

tili

ty A

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riati

on

($)

“Baseline”

UNCDebt Obligation

Construction Loan to ESPC

2 - year averageutility costs

Contract Years

New “Baseline”

ESCO Guarantee Payment(if needed)

0-2 12 (typical)

Project Savings (Project Value)

ESPC

ESPCProcess (Two Years)

Measurement and Verification (Life of Project)Annual certified audits of

savingsUNC obligated for proper

operationESCO refunds savings

shortfall

Construction (12 months)

Fast paced to begin realized savings and make first bond payment

Final Contract

Termination possible if owner pays ESCO costs ($200-500k)

Investment Grade Audit (6-8 months)

Detailed analysis of all measures

Savings within 10% of proposal

Cost limited to 150% of proposal

ESCO Selection (4 months)

Bidders provide detailed cost proposals Best overall value selection

Application to SEO

Buildings defined Costs estimated

ESPCPreliminary Building Screening

Campus

Appropriated (130)

> $2.50/ft2(55)

> $200,000 Utility Cost

(35)

Stable Program (26

+/-)

ESPC 26 Candidate Buildings

2,747,588 square feet $14,156572 utility costs (variable only) $37,641,979 limit on performance contract (12 years,

30%)

20 of the Candidate Buildings were in the ECM Program 2, 213,810 square feet $11,808,301 utility costs (variable only) ECM project savings averaged 23% (range = 0% to 59%)

While ESPC offers little near-term benefit and we have other opportunities for low cost improvements that are outperforming ESPC investments, we have underlying capital needs could be addressed by ESPC

ESPC Plan 10-11Fall 2010 – invite ESCOs to quantify remaining

savings post-ECMWinter 2010 – Finalize candidate buildings

+/- 5 buildings in initial RFP$5 -$15 million contract value

Initial focusECM tuned buildings within 1 year of new

baseline dataBuilding automation system control upgradesLaboratory ventilation optimizationDedicated outdoor air systemsHeat recovery systems

DashboardDecided to reject all bids – too expensiveAgreement with Computer Science to write

the system in conjunction with current Energy Services applications programmersSupervised by Prof. Diane PozefskyMaster’s students

SchedulePrototype by end of Fall 2010Beta version by end of Spring 2011System live by Fall 2011

Deferred Maintenance$645 million backlog

$230 million is HVAC (2nd largest category is $57 million)

HVAC replacement normally must be completed as part of a comprehensive renovation, has been low priority because it requires relocation of building occupants

Divided workload into three groupsDemolishComprehensive renovationComponent replacement

Deferred MaintenanceDeveloping funding plan

Working on identifying new resourcesProjects in annual R&R allocation

Phillips Hall Lineberger Cancer Center

Need More R&R funding overall at state level Different allocation methodology at the state level

Need State of North Carolina to provide deferred maintenance capital infusion - $250 million range (received $515 in 2000 Higher Education Bond funding)

Supply Side InitiativesJu

ly

Aug

ust

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tem

ber

Oct

ober

Nov

embe

r

Dec

embe

r

Janu

ary

Feb

ruar

y

Mar

ch

Apr

il

May

June

$0

$20,000

$40,000

$60,000

$80,000

$100,000

$120,000

$140,000

$160,000

$180,000

$200,000

$0

$100,000

$200,000

$300,000

$400,000

$500,000

Cost Avoidance Thermal Energy Storage System

FY08 FY09 FY10 FY11 FY08 Cumulative FY09 Cumulative FY10 Cumulative

FY11 Cumulative

Mo

nth

ly (

$)

Cu

mu

lati

ve Y

TD

($)

Total avoided cost to date = $1.3 million, to date in 10-11 avoided costs = $282,460

Chilled Water Systems

Supply Side InitiativesChilled Water Systems

Increase production efficiencies33% efficiency increase at Cobb Chiller PlantInstalling a plate and frame heat exchanger at

the Tomkins Center in 10-11Rebuilding North Chiller Plant, will be most the

efficient plant at the end of projectGoal to increase chiller efficiencies by more than

1/3

District energy plant in the Imaging Research Building using heat recovery chillersRecover heat from chilled water systemUse to produce hot water for building use

Supply Side InitiativesCogeneration Systems

7% reduction in thermal losses in steam distribution system

Reduced average condensing rateReplaced VFDs on boilersOptimizing combustion of fluidized bed boilerReducing auxiliary energy usage by 10%

Electric Distribution SystemsLandfill gas project under construction in

2011 to supply electricity to Carolina North

Questions?