cc 2013 annual energy report - colorado college€¦ · purchased 230 kw of solar panels in...

Revision0 September2013

2013ENERGYREPORT

M A R K J . F E R G U S O N , P . E . C A M P U S E N E R G Y M A N A G E R

1 1 2 5 G L E N A V E N U E C O L O R A D O S P R I N G S , C O 8 0 9 0 5

CC 2013 Energy Report

1Revision0 September2013

Table of Contents

ExecutiveSummary..................................................................2

UtilitiesOverview......................................................................3

AvoidedCost................................................................................4

OurCarbonFootprint..............................................................5

Benchmarking.............................................................................6

Benchmarking Educational Facilities............................8

Benchmarking Residential Facilities.............................9

Benchmarking Support Facilities.................................10

UtilityRates...............................................................................11

CampusEnergyManager.....................................................12

CarbonNeutralityActionPlan..........................................13

IncreasedRenewablePurchases......................................14

SoFameHeatRecovery.........................................................15



Executive Summary

The Facilities Services Department at Colorado College is committed to taking action tomeettheCollege’s2020carbonneutralitygoal. UtilitiesmanagementatColoradoCollege(CC)hasbecomeanareaofincreasedemphasis.InFY13weexperiencedcontinuedsuccessindecreasingenergyuseandcostscampuswide.Cumulativeavoidedcostsforutilitiesareestimated inexcessof$2.1Msincethe2008baseline. Somenotableaccomplishments for2013were:

CampusEnergyManagerHiring‐InNovemberof2012CChireditsfirstcampusenergy manager. Mark Ferguson was selected for the position within thefacilitiesservicesdepartment.Markisaprofessionalengineerwithremarkableaccomplishmentsinenergymanagement.

CarbonNeutralityPlanDevelopment–Thisyearaplanwasdevelopedforachievingcarbon neutrality. The development involved Facilities services, the office ofsustainability,andthesustainabilitycouncil. InMayof2013theplanwasbriefedwiththeCollege’sBoardofTrustees.

Increasedrenewableenergypurchases‐In2013,wepurchased3.2%ofourtotalenergy from renewable sources or 10.9% of our electricity. The bulk of ourrenewables was provided by wind purchased from Colorado Springs Utilities.Wealsopurchased230kWinSunShare’ssecondsolargarden.

SofameHeatRecoveryatCentralPlant‐TheSofamesystemrecoverswasteheatfromfluegasesleavingtheCentralHeatingPlantandusestherecoveredheatintheElPomarSportsCenter. Thesystemprovides freeheatingtotheElPomarSportsCenterandreducesCentralPlantemissions.



Utilities Overview

Forthe2013academicyear,ColoradoCollege’smaincampusenergyrelatedcharacteristicswere:

o Approximately2,064,590squarefeet(SF)ofspaceo Approximately95acresoflando 152Buildings

Forthe2013academicyear,ColoradoCollege’smaincampusenergyperformance

statisticswere:

o Energyuseaveraged83.3kBtupersquarefoot(SF) lowestsincethe2008baseline

o Energycostsaveraged$0.90perSF A2.6%decreaseoverpreviousyear

o MTCO2emissionsaveraged0.01052MTCO2eperSF



Avoided Cost

Thecumulativecampusutilitycostavoidancecomparedtothecampusbaselineof2008isestimatedat $2.1M. Theavoided cost for the2013academicyear is estimatedat $570k.These numbers reflect combined utility savings, which account for avoided electricity,natural gas,water, andwastewater costs. Below is a graphical representationof overallavoidedutilitycosts.



Our Carbon Footprint

ColoradoCollege’scommitmenttobecomecarbonneutralstemsfromtheCollege’ssigningofthePresidents’ClimateCommitmentin2009.TheCollege’scarbonfootprintisestimatedat29,179metrictonsofCO2(MTCO2)forthe2008baseline. Since2008ColoradoCollegehas been progressing towards its carbon neutrality goal. For 2012 the College’s carbonemissions are estimated at 21,638 MTCO2 for a reduction of 26%. These measurementsincludeemissionsaslistedbelow:


Benchmarking

ColoradoCollege has been tracking overall campus energy and cost intensity since 2008.ForreferencetheAssociationofPhysicalPlantAdministrators(APPA),whorepresentsthelargestinternationalassociationofeducationalinstitutionsandtheirfacilitiesdepartments,listthe2012averageenergyintensityat121kBtu/SF/Yr. APPAliststheaveragecostpersquare foot at $2.25 / SF. The chart below showsCC iswell belowboth figureswith anintensity of 83 kBtu/SF/Yr and a cost of $0.90/SF. The chart also confirms a sustaineddeclineinbothenergycostanduse.

One factor that is unclear is what effect CC’s block plan has on our overall energy useintensity. Theblock is thought to requiremore educational spacebecause all spaces areused simultaneously. For comparison the following annual kBtu/SF/Yr numbers werecalculatedusingthemostrecentASHEESTARSdata:

CarletonCollege‐NoData ColbyCollege‐146kBtu/SF ColgateUniversity‐171kBtu/SF GrinnellCollege‐NoData MiddleburyCollege‐NoData PomonaCollege‐134kBtu/SF UniversityofDenver‐101kBtu/SF UniversityofColoradoBoulder‐134kBtu/SF WilliamsCollege‐141kBtu/SF

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Thechartabovebreaksdownexpensesbyutilitycommodity.Themostnotableinformationis the increases inelectricityandwatercostsdespitereduceduse. Thechartsbelowgivemoredetailontheserelationships.

Thisisthefirstyearforbenchmarkingatabuildinglevel.Twoyearsagothermalmeteringwas installed enabling CC tomeasure the amount of heating and cooling energy flowingfrom the central plant. The following charts are the results of building level metering.

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Benchmarking Educational Facilities


Benchmarking Residential Facilities


Benchmarking Support Facilities

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Utility Rates

CC has made significant improvements in reducing use since 2008. Despite theseimprovementsourcostsarerelativelyunchangedduetoincreaseinutilityrates.Thechartsbelow show the variation in commodity rates per unit experienced by CC since 2008.Electricity and water rate increases have seen larger than expected upward pressure.Natural gas costshavedeclinedduemarket conditions and tomoving to an interruptiblerate.


Campus Energy Manager

InNovember of 2012CChired its first campus energymanager. Mark Fergusonwasselected for the position within the facilities services department. Mark is aprofessionalengineerwithremarkableaccomplishmentsinenergymanagement.Markholdsabachelor’sdegree inmechanicalengineering,amaster’sdegree inengineeringmanagementandamaster’sofbusinessadministration in finance. Inaddition tohisextensiveeducation,Markholdsthefollowingcertifications:

Certified Energy Manager (CEM)

Certified Energy Auditor (CEA)

Certified Green Building Engineer (GBE)

Certified Building Commissioning Professional (CBCP)

Certified Energy Procurement Professional (CEP)

Certified Measurement & Verification Professional (CMVP)

Certified Renewable Energy Professional (REP) Mark comes from Colorado Springs School District 11, where he worked as theirEnergy Program Manager / Project Manager for the last 7 years. Mark managedutilities for 4.5M square feet of buildings space and 758 acres throughout ColoradoSprings.MarkinitiallyworkedonD‐11’s$150Mbondprogram.Onesignificantaccomplishmentofthebondprogramwastheconstructionof2newelementaryschoolswhichoperateinthe99thpercentileofschoolbuildingsforenergyefficiencyintheUnitedStates.The energy program Mark managed and developed was responsible for a 30%reductioninenergyuseand$15.1Minavoidedenergycosts.MarkearnedtheDistrictsLeadershipAward for labeling40of55eligiblebuildingswith theEPA’sEnergy Star.Theaverageageofthesebuildingswas50yearsold.Mark is very excited about renewable energy. He currently has 2 photovoltaic solarsystems on his own home. In 2012 Mark designed and installed, using in‐houseresources, ~420kW of photovoltaic solar throughout D‐11. The project was so wellplannedandmanagedthatitwasabletoachieveanestimatedpaybackof6years.



Carbon Neutrality Action Plan

29,179 MTCO2

Carbon Neutrality

2MW PV Array This project includes construction of a 2 MW ACsolar facility inColoradoSpringsbefore July2015.The college would receive 3 times the renewableenergy credits under Colorado’s RenewablePortfolio Standards. A special contract withColorado Springs Utilities would allow fordistributiontoColoradoCollege.ProjectCost=$6.5MCarbonReduction=8,940MTCO2SimplePayback=11.5Years*@5%IRR&UtilityRateEscalation

Carbon Offset InvestmentProjectCost=$6k‐$90kAnnuallyCarbonReduction=~2747MTCO2

Combined Heat and Power

This project would add power productionto our existing heat production at thecentral plant. Combining the heat andpowergenerationonsiteprovidesthemostefficientuseofenergytoColoradoCollege.This process would also switch our fuelsource from coal to natural gas. Theproject would reduce carbon emissionsfromColoradoCollege’selectricityby80%.ProjectCost=$15.5MCarbonReduction=10,000MTCO2SimplePayback=10.7Years*@5%IRR&UtilityRateEscalation


Increased Renewable Purchases

ThisyearCCincreaseditspurchasesofrenewableenergy.Intotal,wepurchased3.2%ofourtotalenergyfromrenewablesourcesor10.9%ofourelectricity.Thebulkofourrenewables was provided by wind purchased from Colorado Springs Utilities. TheCollegeenteredintoatwoyearcontractbeginningSeptemberof2012for1000MWh’sofwindperyear.InApril,wedoubledourpurchaseto2000MWh’s/year.AllwindisappliedtotheCollege’sCentralPlantwhichservesmostlargebuildingsoncampus with high temperature heating water and chilled water. Below is therenewableenergycertificateprovidedbyCSUforthispurchase.

The secondmajor purchase of renewable energy occurred in November of 2012. CCpurchased230kWofsolarpanelsinSunShare’ssecondsolargardenproject.Aspartofthis purchase, the College receives all energyproduced by the panels for the next 20years and renewable energy certificates from SunShare each year. For the 2013academicyearthesecertificatestotaled462MWh’s.



Sofame Heat Recovery In Januaryof2013Facilities Services completed the SofameHeatRecoveryProject attheWilliamsCentral Plant. The scope of the projectwas to recoverwaste heat fromflue gases leaving the high temperature hot water generators and use the recoveredheatintheElPomarSportsCenter. ThesystemprovidesfreeheatingtotheElPomarSportsCenterandreducesCentralPlantemissions.TheSofamePercothermsystem isadirect contactprimaryheatexchangersystem. Itallows our central heating plant to achieve greater efficiencies by collecting theremainingsensibleandlatentheatfromtheplant’sfluegas.Standardboilerefficiencyis 80%. The maximum efficiency threshold for sensible heat recovery is 88%. Bycondensingthefluegas,latentheatrecoverybeginsallowingforhigherefficiencies.Condensingbeginsat~135°Fmeaningtheheatingwaterleavingthesystemis~135°Forless.AsecondaryclosedloopflatplateheatexchangeristhenusedtomoveheattotheElPomarSportCenterheatingsystem.Thebuildingheatingsystemisdesignedtoheatusing135°Fhotwaterand is supplementedbywater fromthehigh temperaturehotwatersystem.Therecoveredheatisalsousedtoheatdomestichotwaterandtheswimming pool. Below is a schematic from our building automation system whichillustratesthesystemsoperation.

The costof this systemwas$750k. During the first 6monthsof operation, ElPomarSports Center utilized 2,479 MBtu’s of heat from the Sofame Heat Recovery System.Thesavingsassociatedwiththisamountofheatis$17,515withplantanddistributionlosses. The constraint to our savings is the amount of heat requiredby the building.The system is rated for ~1MBtu/hr. Construction of the addition at El Pomar SportCenterwascompleted inAprilgivingusa largerheatsink. Weanticipate thesavingswillbeinexcessof$50kfor2014.


2014 Sustainability Projects 2MWSolarProject–InJulyof2013theCollege’sBoardofTrusteesapprovedfundingfortheconstructionof2megawatts(MW)ofphotovoltaic(PV)solarpower.This2MWsolar arraywill produce~35%of the CC’s electricity needs. Currently the College isworkingwithColoradoSpringsUtilitieson the termsofanagreement toconstructanarrayoffsiteanddeliveritsenergyandREC’stocampus.TheprojectisexpectedtobecompletebyDecemberof2014.SpencerCenterHighPerformanceBuildingDesign – TheCampusEnergyManagerhas been very involved in the design of the Spencer Center Renovation to insure thebuildingsenergyperformancealignswithCC’ssustainabilitygoals. Somehighlightsofthe buildings high performance design are an R‐27 envelope assembly, variablerefrigerant flowwater sourceheatpumpsystem,LED lighting, andan interconnectedPV system. For example, the LED lighting systemwill operate at 0.3W/SFwhile theminimumcoderequirementis1.0W/SF.BarnesFumeHoodProject –ThisyearFacilitiesServices isworkingonaproject toupdate 27 year old fumehoodswith air flowmonitoring to insureproper airflow fordiffering sashpositions. To improve energyperformance inBarneswe are replacingthepneumaticcontrolsonthesupplyairandroomexhaustwithdirectdigitalcontrols(DDC). Thesenewcontrolswillallowustoapplymoresophisticatedlogictoeachlaband reduce air changes during unoccupied times. The system will also allow us tooperate the room exhaust and fume hood exhaust as a coordinated system to insureproperlabventilation.CampusCombinedHeatandPowerFeasibilityStudy–InanticipationofPhase3oftheCarbonNeutralityActionPlanrecommendations,FacilitiesServicesisdeterminingthe best alternative for integrating a combined heat and power system on campus.FacilitiesServicesisenlistingprofessionalengineeringservicestoprovideafeasibilitystudy for the campus. The study will provide a comparison of all applicable CHPoptions and then provide schematic design for the selected option. This study willdeveloptheprojectscopeandprovideamoredetailedcostestimate.WornerSolarThermal–TheWornerSolarThermalProjectisthefirstapplicationofsolar thermal hot water collectors on campus. The project is going to use solar hotwatertopreheat/heatdomestichotwaterservingWornerCenter. WornerCenterisagreat location for this system due to its continuous hot water demand to supportcookingoperations.Thesystemisintendedtostudythefeasibilityofmeetingcampuswidedomesticwaterdemandsduringthesummer.Favorablesystemperformanceandoperationcouldallow for shutdownofhigh temperaturehotwater generationat thecentralplantduringthesummer.



Net‐ZeroSynergyHouse–TheSynergyhouseat1018N.Weberisthelocationofourfirst net‐zero building. The students who live in the Synergy houses are among themostcommittedtosustainabilityoncampus.Thisprojectisdesignedtogivestudentsaprototype tostudyanddiscussaswemovecloser tocarbonneutrality. Theprojecthasalreadyaddedelectricwaterandspaceheatingtothehouse.Inadditionastateoftheartwebbasedthermostathasbeenaddedallowingstudenttomonitorandmanagethehouseremotely.APVsystemwillbeaddedinthespring.Packard Auditorium HVAC Controls Upgrade – The HVAC system serving thePackard Auditorium utilized outdated pneumatic controls and operated 24/7. Thisproject replaces those controlswithnewDDCcontrols. Thenewcontrolswill enableus to schedule equipment operation for the space. One feature added to the newcontrolsisdemandcontrolventilation.Theuseofnewsensorsenablesustomaintainexcellentindoorairqualityandsaveenergy.OlinPowerFactorCorrection–TheelectricalloadsatOlinHallrequiremorecurrenttoachievethesameamountofusefulworkasotherfacilities.Theresultisanincreasein the amount of energy lost in the distribution system. This project corrects thefacilitiespowerfactorsavingthatenergy.Thepaybackisjustover3years.CampusHousingWirelessThermostats –Wireless thermostats are thewaveof thefuture. They allow people to monitor and control their homes remotely from theirsmartphones.Thisprojectistoinstall10wirelessthermostatsinhousesoncampustoget a feel for the technology. Approximately 3 differentmanufacturerswill be used.The goal is to empower residents with the tools to better manage their energyconsumption.ArmstrongAuditoriumCO2Sensor–ThisprojectaddsdemandcontrolventilationtoArmstrong’sauditorium.DemandcontrolventilationusesCO2sensorstomeasuretheamountofCO2inthespaceandmodulatetheoutsideairdampertomaintainoptimalairqualitylevels. Itsavedenergybyreducingtheamountofoutsideairthesystemisrequiredtoconditionwhenairqualityisgood.

cc 2013 annual energy report - colorado college€¦ · purchased 230 kw of solar panels in...

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