cc 2015 annual energy report - colorado college · cc 2015 energy report 12 revision 0 september...

Revision0 September2015

2015ENERGYREPORT

MarkJ.Ferguson,P.E.CampusOperations&PlantManager

CC 2015 Energy Report

1Revision0 September2015

Table of Contents

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

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

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

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

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

Benchmarking Educational Facilities.................................9

Benchmarking Residential Facilities...............................10

Benchmarking Support Facilities......................................11

UtilityRates...............................................................................12

RenewableEnergyPurchases...........................................13

2015FacilitiesSustainabilityProjects...........................14

2016FacilitiesSustainabilityProjects...........................22



Executive Summary

TheFacilitiesServicesDepartmentatColoradoCollege(CC)iscommittedtotakingactiontomeet the College’s carbon goals. Utilitiesmanagement at Colorado College is an area ofincreasedphysicalplantemphasis. InFY15,CCexperiencedan8.4%decrease inenergyconsumption campus wide due to near average weather and a continued emphasis onenergyefficiency. Cumulativeavoidedcosts forutilitiesareestimated tobenearly$3.4Msincethe2008baseline.Somenotableaccomplishmentsfor2015are:

IncreasedRenewableEnergyPurchases‐ThisyearCCincreaseditspurchasesof

renewableenergy. In total thisacademicyear,CCpurchased4.6%ofour totalenergyfromrenewablesourcesor16.2%ofourelectricity.

Recognitions – Colorado College was selected as the WateReuse ColoradoCustomeroftheYear.ThisyearColoradoCollegealsoachievedagoldratingsfromASHEE for STARS (sustainability tracking, assessment, and ratings system).Colorado College was recognized as an EPA Green Power Partner for renewableenergypurchasesmadeduringthe2014academicyear.

2015SustainabilityProjects–ThisyearCCcompleteda largequantityofprojectswith the purpose of supporting campus energy efficiency goals. Completedprojects include the conversion to LED lighting in many facilities on campus,commissioningof theSpencerCenter, andautomationof the centralheatingplantoperations.Moredetailonthisyear’scompletedprojectsbeginsonpage14ofthisreport.

2016SustainabilityProjects–Wehaveanexcitinglistofprojectonthehorizonforfiscalyear16.TheseprojectsincludethecompletionofsolarinstalledbystudentsatourBacaCampus.Moredetailontheseprojectsbeginsonpage22ofthisreport.



Utilities Overview

Forthe2015academicyear,ColoradoCollege’smaincampusenergyrelatedcharacteristicswere:

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

Forthe2015academicyear,ColoradoCollege’smaincampusenergyperformance

statisticswere:

o Energyuseaveraged79.0kBtupersquarefoot(SF) 8.4%decreaseoverpreviousyear 16.2%ofelectricityfromrenewablesources

o Energycostsaveraged$0.92perSF 6.4%decreaseoverpreviousyear $3.4Minavoidedcostssince2008

o MTCO2emissionsfromenergyuseaveraged0.0085MTCO2eperSF 8.6%decreaseoverpreviousyear 28.8%decreasefrom2008



Avoided Cost

Thecumulativecampusutilitycostavoidancecomparedtothecampusbaselineof2008isestimated at nearly $3.4M. The avoided cost for the 2015 academic year is estimated at$676K. Thesenumbersreflectcombinedutilitysavings,whichincludeavoidedelectricity,natural gas,water, andwastewater costs. Below is a graphical representationof overallavoidedutilitycosts(areainblue).



Our Carbon Footprint

ColoradoCollege’scommitmenttobecomecarbonneutralstemsfromtheCollege’ssigningof the Presidents’ Climate Commitment in early 2009. The College’s carbon footprint, in2008, from energy use is estimated at 24,437metric tons of CO2 (MTCO2). Since 2008,ColoradoCollegehasmadesteadyprogresstowarditscarbonneutralitygoal.For2015,theCollege’scarbonemissionsfromenergyuseareestimatedat17,392MTCO2forareductionof 28.8% compared to the 2008 baseline. These measurements assume a consistentColoradoSpringsUtilities(CSU)fuelmixandincludeemissionsaslistedbelow:

IfweweretotakeintoaccountCSU’sfuelmix,thereductionwouldbemuchgreater.Since2008CSUhasimproveditsuseofrenewableenergy. Lastyear‘s fireat theDrakePowerPlantresultedinamuchcleanerCSUfuelmix.Youcannotethelast3year’sfuelmixbelow:



Benchmarking

ColoradoCollege has been tracking overall campus energy and cost intensity since 2008.Forreference,theAssociationofPhysicalPlantAdministrators(APPA),whorepresentsthelargestinternationalassociationofeducationalinstitutionsandtheirfacilitiesdepartments,list the2014averageenergy intensityat130kBtu/SF/Yr. APPAlists theaverageutilitiescostpersquarefootat$2.46/SF.ThechartbelowshowsCCiswellbelowbothfigureswithan average energy intensity of 79 kBtu/SF/Yr and energy cost of $0.92/SF. The chartconfirmsCC’ssustaineddeclineinbothenergycostanduse.

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 werecalculatedusingthemostrecentASHEESTARSdataavailable:

ColbyCollege 144kBtu/SF 12/2014data ColgateUniversity 161kBtu/SF 07/2013data MiddleburyCollege 137kBtu/SF 05/2014data PomonaCollege 83kBtu/SF 04/2014data UniversityofDenver 104kBtu/SF 07/2011data UniversityofColoradoBoulder 144kBtu/SF 09/2014data WilliamsCollege 148kBtu/SF 08/2011data


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Thechartabovebreaksdownexpensesbyutilitycommodity.Themostnotableinformationis the increase in electricity andwater costsdespite reduceduse. The charts belowgivemoredetailontheserelationships.



This is the third year for energy benchmarking at the building level. Four years ago,thermalmeteringwasinstalled.ThermalmeteringhasenabledCCtomeasuretheamountofheatingandcoolingenergy flowing fromthecentralplant torespectivebuildings. Thefollowingchartsaretheresultofbuildinglevelthermalandelectricalmetering.



Benchmarking Educational Facilities



Benchmarking Residential Facilities



Benchmarking Support Facilities



Utility Rates

CChasmadesignificantimprovementsinreducingutilityconsumptionsince2008.Despitetheseimprovements,totalcostsarerelativelyunchangedduetoannualincreasesinutilityrates.ThechartsbelowshowthevariationincommodityratesperunitexperiencedbyCCsince 2008. Electricity andwater rate increases have seen larger than expected upwardpressure.Naturalgascostshavedeclinedduetomarketconditions.



Renewable Energy Purchases

Thisyear,ColoradoCollegeearnedrecognitionasanEPAGreenEnergyPartnerbasedon the level of renewable energy purchases made during the 2014 academic year.During the 2015 academic year Colorado College increased its participation incommunitysolargardenssigning2‐20yearcontractstopurchasetheproductionfrom416 kW of community solar garden capacity and retain all of the associatedenvironmentalattributes.For the 2015 academic year,we purchased 4.6% of our total energy from renewablesourcesor16.2%ofourelectricity.Thebulkofourrenewableswasprovidedbywindpurchased fromColoradoSpringsUtilities(CSU). TheCollegeentered intoatwoyearwindcontractbeginningSeptemberof2012for1000MWh’sofwindperyear.InApril2013, we doubled our purchase to 2000 MWh’s / year. The contract ended onDecember31st,2014.All wind power is applied to the College’s Central Plant which serves most largebuildingsoncampuswithhightemperatureheatingwaterandchilledwater. BelowistherenewableenergycertificateprovidedbyCSUforthewindpurchase.



2015 Facilities Sustainability Projects

SpencerCenterCommissioningUpdateProjectStatus:CompleteAugust2015ProjectDescription:Thisprojectwasthefollow‐uptolastyear’srenovationoftheSpencerCenter. As part of this project we worked with contractors and building occupants tovalidate building systemwere operating and performing as designed. TheHVAC systemwastestedandadjustedthroughboththeheatingandcoolingseasons.Itemsaffectingthebuildingenergyconsumptionwerediscoveredandcorrected. Suchitemsincludedacrossconnection in the buildings condensingwater loop and a factory defect in the occupancysensorswhichcontrolboththespacelightingandHVAC.Theprojectalsomeasuredenergyconsumption for comparison to the20kBtu/Sf target. Last year SpencerCenterused31kBtu/Sf.ThechartbelowdetailsmonthlyenergyusebysourceforSpencer.Approximately10kBtu/Sfofthebuildingsenergyusewasfromnaturalgaswhichisusedonly inLa’au’sTacoShop.

CampusControlsUpgradesPhase1

ProjectStatus:ConstructionProject Description: This project is a 3 phase project to replace obsolete controls oncampus with the latest platform of AX direct digital controls. The updated controlsallow the College to applymore sophisticated logic andmanage energy consumptionmore closely. In addition to updating controls, the project allows more space forarchiving data and alarms. This data is essential for benchmarking continuousoperational improvements. In each of the science buildings notifications are beingcreated to automatically notify faculty via text or email when lab conditions such aspoweroutagesortemperaturefluctuationsbeyondaspecifiedthresholdoccur.



FirmNaturalGasTransportationProjectStatus:CompleteOctober14ProjectDescription:Thefirmnaturalgastransportationprojectisachangeinthewaywebuynaturalgasatourcentralplant. PreviouslywewereonaninterruptibleratemeaningColorado Springs Utilities could interrupt the delivery of natural gas to us at any time.Whenthishappens,weswitchtoourback‐upfuel#2fueloil. Thisprojectmovesusfrominterruptibleservicetofirmservicemeaningourservicecannotbeinterrupted.Aspartofthis project the College has contracted to purchase natural gas from ontinuum Energy.SincetheprojectwascompletedinOctoberof2014,thecentralplanthasonlyburnedfueloil foroperator trainingandemergencypower testing. Wehaveaddeda fueladditive topreserveourstoredfueloil.ProjectHighlights:

Improvecentralplantreliability Abilitytolockpricing

Real‐TimeEnergyDashboardsProjectStatus:ConstructionProject Description: This project is to create dashboards internal to our buildingautomationsystem.Thesedashboardswillprovidebuildingtechniciansreal‐timefeedbackon building operations. Getting this information in real‐time will help techniciansunderstand and manage building energy use. A dashboard created for electrical use atArmstrongHallcanbereferencedbelow.ProjectHighlights:

Projectcost=$2500



MonthlyBuildingAutomationReviewProjectStatus:OngoingProjectDescription: Themonthlybuildingautomationreviewprojectisaperiodicreviewwithstakeholderstoreviewbuildingperformancethroughthebuildingautomationsystemandmakeadjustmentsasneeded.Thisperiodicreviewisusedtocommissionnewprojects,trouble shoot controls issues, and retro‐commissionbuildings that arenotperforming aswellasexpected.

HonnenLEDLightingProjectStatus:CompleteJanuary2015ProjectHighlights:

Energyreduction=75% Simplepayback=9Months Estimatedcarbonsavings=100MTCO2/Yr

ProjectDescription:TheHonnenLEDlightingprojectreplaced1000WmetalhalidelightinginHonnenIceArenawith231WLEDfixtures.ThisprojectwascompletedneartheendofJanuary2015. Afterrebatesthe finalprojectcostwas$13k. Wesaved$6,808inthe firstfivemonthsofoperation.Belowisreal‐timeenergymeteringwhichshowsthereductioninelectricalconsumptionatHonnenIceArena.



SchlessmanLEDLightingProjectStatus:CompleteMay2015Project Description: Replace metal halide lighting in the Schlessman Pool with moreefficientLEDlighting.Belowaresomeprojecthighlightsandasnapshotfromourreal‐timeenergymetering showing the reduction in electrical demandon the averagedaily profileresulting from improvements made this year including LED lighting. The yellow lineindicateselectricaldemandduringthesameperiodoneyearprior.ProjectHighlights:

Energyreduction=75% EstimatedSimplePayback=1Year Estimatedcarbonsavings=40MTCO2/Yr

WornerSteamGeneratorProjectStatus:CompleteJune2015ProjectDescription: TheWornersteamgeneratorprojectaddedasteamgeneratortotheWorner Center to support cooking operations and allow the temperature of the hightemperature hot water loop to be lowered during the summer. The campus hightemperature hot water loop temperature during the summer is driven by the need forsteam to support cookingoperations atWornerCenter. By removing this constraint, thecentralized systemwill be able to run at a lower temperature. Thiswill save energy bydecreasingsystemlossesinthecampusdistributionsystem.ProjectHighlights:

Improvescampushightemperaturehotwatersystemefficiencyduringthesummer



CentralPlantDemandLimitingProjectStatus:CompleteProjectDescription:Thisprojectincludedtrainingandadjustmentstothecontrolsonthechilledwaterplanttolimitplantdemandandsavecost.Theseimprovementswillsaveapproximately$30kperyearindemandpenaltieschargedbyColoradoSpringsUtilitieswhiledeliveringthesamelevelofservicetocampus.Lastyearthepeakdemandonourcentralplantreached1029kW.Sofarthisyearourhighestpeakdemandhasbeen750kW.Thegraphicbelowshowspartofourrevisedstrategyinpractice.Youwillnotefromtheredlinethattheplantstartsearlierandislimitedforthefirstfewhoursofoperation.Gettinganearlierstarthelpsususelesspowerthroughouttheday.

ElPomarEfficiencyUpgradesProjectStatus:In‐ProgressProjectDescription:TheElPomarenergyefficiencyupgradesprojectincludeslightingandcontrols retrofits to improve building energy efficiency. El Pomar is one of the mostexpensive facilitiesoncampus forelectricityaveragingover$0.13/kWhmaking it agreatopportunityforefficiencyupgrades.SofarwehavecompletedLEDlightingretrofitsintheauxiliary gym, squash, and racket ball courts. These retrofits reduced lighting energyconsumptionbymorethan70%intheseareas.ThenextstepistoaddoccupancysensorsthatwillcontrolbothlightingandHVAC.



CentralPlantControlsUpgradePhase1ProjectStatus:CompleteProjectDescription: Phase1of the centralplant controlsupgradeproject completed theautomationofthecentralplantheatingoperation.Thisincludedautomationofthecampushigh temperature hot water expansion tank controls, variable frequency drives for hightemperature hot water system pumps, and improved flow control of the campus hightemperaturehotwater loop. Thecontrolswork includesaddingsystemlogictoallowforthemodulationofthehightemperaturehotwatersystemexpansiontankanddistributionsystem pumps and valves. These controlswill enable the central plant to adjust systemtemperaturemorefrequentlytohelpoptimizecentralheatingplantefficiency.Theprojectalsoaddedalarmsforsafetyallowingtheplanttobeleftunmanned.Thissummercentralplantoperatorsusedthisnewunmannedoperationtimetoperformmaintenanceactivitiesonthedistributionsystem.ProjectHighlights:

Improvescentralplantefficiency Improvesdistributionsystemreliability

SchlessmanPoolWaterConservationProjectStatus:In‐ProgressProject Description: The Schlessman pool water conservation project is intended toreducewaterconsumptionat thepool. Ourbenchmarkingeffortshaverevealedthat thepoolconsumedmorethan760,000cubicfeet(CF)ofwaterlastyear.Thecalculationbelowestimatesthedailyconsumptionfromevaporationwhichtranslatesto~57,000CFfortheyear. Wehaveperformedextensive testingand aremaking repairs to thepoolpiping tocorrecttheproblem.

IndoorPoolMeasurements

AirTemperature=79°FRelativeHumidity=24%

CO₂=263ppmWaterTemperature=82°F

CCUncoveredIndoorPoolEvaporationCalculation

SimplifiedCalculationUsingASHRAE2007ApplicationsHandbook

wp=0.1A*(pw‐pa)*Fa=0.1*4700*(1.1‐0.24)*1.0=404.2lbs/hrCCPoolEvaporation=48.44gallons/hour

A=4700squarefeet

pw=1.1inhg(@82°Fwatertemp)pa=0.24inhg(@79°Fairtemperatureat24%RH,39dewpoint)

Fa=1.0public,schools



BarnesRepair5thFloorHeatingPipingProjectStatus:CompleteProject Description: Barnes repair 5th floor heating piping is the second phase of pipingrepairsinBarnesScienceCenter.TheprojectincludesworktoweldleakyVictaulicfittingsandreplacepneumaticcontrolsonthe5thfloor. Theprojectsavesenergybecausetheoldpiping must be maintained at higher operating temperatures through the summer topreventleaking.Weldingthepipingwillallowheatingsystemtemperaturestobesetbackinthesummer.ProjectHighlights:

Summerenergysavings Improvedsystemreliability Improvedoccupantcomfort

OlinFreezeProtectionProjectStatus:In‐ProgressProject Description: The Olin freeze protection project was created out of necessity tocorrectfrequentwintertimeissuesresultinginflooddamagetoOlinHall. Thegoaloftheprojectistopositivelypressurizethebuildingtopreventbringingcoldairintoexteriorpipechases.Theprojectalsoincludeperimeterleakdetectionandautomationthatwillclosethebuildingsdomesticwatersupplyvalveandsendanalarmtotheheatingplantwhenaleakisdetected or specified flow thresholds are exceeded. Initial results show a dramaticreduction in energy consumption. The red line on the chart below shows the buildingsaveragedailychilledwaterdemandislessthanhalfofwhatitwasoneyearprior.



CossittLEDLightingProjectStatus:CompleteMarch2015Project Description: The Cossitt LED lighting project replaced metal halide lighting inCossittwithmoreefficientLEDlighting.Belowaresomeprojectbeforeandafterphotos.ProjectHighlights:

Energyreduction=75% EstimatedSimplePayback=1Year

Before

After



2016 Facilities Sustainability Projects

TuttLibraryDesignReviewProjectStatus:In‐ProgressProjectDescription:TheTuttLibrarydesignreviewprojectisacontinuousefforttoensurethe owners project requirements are accurately captured in the building’s designdocuments.ThenewTuttLibraryistobeabuildingwhosedesignteachescriticallessonsabouthowtocreateandsustainhealthy,productive,andflexiblestudent,staff,andfacultyspaces. The purpose of this project is tomake sure that the designmeets the ColoradoCollege’s innovative high performance standards. High performance at Colorado Collegemeans achieving the optimal balance between maximizing building performance andoccupant comfort while minimizing operational life cycle cost, energy consumption andcarbon emissions. Achieving high performance design requires collaboration andintegrated solutions from each discipline of the design team and owner collaborationthroughoutthedesignprocess.ProjectHighlights:TheTuttLibraryProjecthighperformancedesigngoalistoachievethefollowinglevelsofsustainablebuildingperformanceinthenewlibrary.

NetBuildingEnergyUse=0kBtu/SF/Yrorless NetCarbonEmission=0MTCO2e/Yrorless AnnualEnergyCost=$0.50/SF/Yrorless TotalBuildingEnvelopePerformance(U)=.05orless IndoorAirQuality=700PPMCO2orlessduringoccupiedtimes OccupantComfort=±2°Forlessfromsetpoint ArtificialLighting=.3W/SForless BuildingPowerFactor=notlessthan0.95laggingattheutilitymeter A building that educates occupants about its sustainable features and how to

properlyusethem. Abuildingthatsupportscampusrecyclingpractices.

CentralPlantWaterConservation&HeatRecoveryProjectStatus:PlanningProject Description: The central plant water conservations & heat recovery project willwork to optimizewater use and heat recovery at the central plant. Currentlywe utilizedomesticwatertocoolthebearingsonourcentralhightemperaturehotwaterpumps.Thisprojectwouldautomatetheflowofwatertothesepumpsandlookatrecoveringheatfromthiswater.Therecoveredheatcouldbesenttoeitherthelowtemperatureheatinglooporthechilledwater loopduringtheheatingseason. Theprojectwillalso lookatrecoveringheatfromtheicerinkcoolingtower.ProjectHighlights:

Improvescentralplantefficiency Reduceswateruseandcost



BacaPVSolarProjectStatus:In‐ProgressProjectDescription:TheBacaPVsolarprojectisnearlycomplete.ThisprojectwillprovidemorepowerthanisconsumedattheBacaCampus.Theprojectisahandsonopportunityfor students to learn about renewable energy. The picture below is of students whoparticipatedintheseconddayofinstallationaspartofearlynewstudentorientation.ProjectHighlights:

Studentinstalled 2–15.5kWPVarrays

CampusControlsUpgradesPhase2ProjectStatus:PlanningProject Description: This project is phase 2 of a 3 phase project to replace obsoletecontrolsoncampuswiththelatestplatformofAXdirectdigitalcontrols. Theupdatedcontrols allow the College to apply more sophisticated logic and manage energyconsumptionmore closely. In addition to updating controls, the project allowsmorespace for archiving data and alarms. This data is essential for benchmarkingcontinuousoperationalimprovements.

CampusLEDLightingUpgrades

ProjectStatus:On‐goingProject Description: The campus LED lighting upgrade project is an ongoing project toreplacelightingoncampuswithmoreefficientLEDlighting. Thisprojectassistsleveragesutilityrebatestoassistwiththerestorationandreplacementofcampuslighting.ProjectHighlights:

Takesadvantageofutilityrebates Improveslightinglevels Reducesenergyconsumption



HonnenFirmNaturalGasTransportationProjectStatus:ConstructionProjectDescription:TheHonnenfirmnaturalgastransportationprojectisachangeinthewaywebuynaturalgasatourHonnenIceArena.CurrentlyweareonaninterruptibleratemeaningColoradoSpringsUtilitiescanstopnaturalgasdeliverytousatanytime. Whenthishappens,HonnenIceArenaiswithoutheat. Thisprojectmovesusfrominterruptibleservice to firm service meaning our service cannot be interrupted. For this project theCollegewillutilizeitsexistingcontracttopurchasenaturalgasfromontinuumEnergy.ProjectHighlights:

Firmnaturalgassupply Utilizesexistingcapacity

ElPomarElectricalServiceUpgradesProjectStatus:PlanningProjectDescription: TheElPomarelectrical serviceupgradesprojectwilleithersplit thebuildings electrical service or combine it with the central plant to reduce cost. Due todemand at El Pomar the building experiences rates as high as $018/kWhwhich ismorethan double the campus average of $0.085/kWh. The buildings use profile is uniquebecauseitspeakdemandoccursbetween4pmand10pmduringthewinterwhichisanon‐peakperiod.Duringthistimestudentareutilizingthefitnesscenterandthefieldlightsaton.Duringthissameperiod,thecentralchillerplantisidleandcouldsupplytheadditionalcapacityrequired. Another techniquewouldbe toaddmetersandmove the facility fromtheETLratetotheE2Cratewhichdoesnotchargefordemand.Eithermethodwouldyieldapproximatelya3to5yearpayback.ProjectHighlights:

Reducesenergycosts

CentralPlantControlsUpgradePhase2ProjectStatus:PlanningProjectDescription: Thecentralplant controlsupgradephase2projectwill improve theautomation of the central plant heating operation. The controls work includes addingcontrolsandsystemlogictoenableremotestartingandautomatetemperaturemodulationof the high temperature hot water generators and distribution system pumps. Thesecontrolsoptimize centralheatingplant reliability andefficiency. Theprojectwill expandalarms for safety allowing the plant to be controlled remotely and left unmanned forextendedperiodsbeyondjustthesummer.Theextendedperiodsoftimewillallowcentralplant operators time to perform maintenance activities on the distribution system andrespondtoafter‐hoursemergenciesoncampus.ProjectHighlights:

Improvescentralplantefficiency Improvessystemreliability Improvesafterhoursresponsetocampusemergencies



BarnesRepair1st&3rdFloorHeatingPipingProjectStatus:PlanningProjectDescription:Barnesrepair1st&3rdfloorpipingisthethirdphaseofpipingrepairsin Barnes Science Center. The project includeswork toweld leaky Victaulic fittings andreplacepneumaticcontrolsonthe1st&3rdfloor.Theprojectsavesenergybecausetheoldpiping must be maintained at higher operating temperatures through the summer topreventleaking.Weldingthepipingwillallowheatingsystemtemperaturestobesetbackinthesummer.ProjectHighlights:

Summerenergysavings Improvedsystemreliability Improvedoccupantcomfort

CutlerHVACSystemReplacementProjectStatus:DesignProject Description: This project will replace the existing heating, ventilation and airconditioning (HVAC) systems at Cutler Hall. Currently Cutler utilizes steam for heatingprovided from Bemis Hall. The systems do not have good zone control, so as a resultoccupants are often too hot or too cold. The new system will utilize a new variablerefrigerant flow heat pump system to maximize occupant comfort and efficiency whilemaintainingthehistoriccharacteristicsofthebuilding. Thesystemwillalsohelpsupportrenovationtorepurposethesecondfloorofthefacility.ProjectHighlights:

Improvedsystemreliability&efficiency Improvedoccupantcomfort

CornerstoneRetro‐CommissioningProjectStatus:In‐progressProjectDescription: TheCornerstoneretro‐commissioningprojectwillreducetheoverallenergy intensity at Cornerstone Arts Center. The project is to evaluate the operation ofbuilding systems and return them to the intended design parameters. From thereadditional savingsopportunitieswillbe identifiedandpursued tomaximize thebuildingsenergyperformance.Currentlythebuildingutilizeslargequantitiesofoutsideair.Aspartof thisprojectwewill attempt tominimize theamountof conditionedair that leaves thebuildingwhenindoorairqualityisatacceptablelevels.Inmanycasescommissioningworkalsoimprovesoccupantcomfort.

cc 2015 annual energy report - colorado college · cc 2015 energy report 12 revision 0 september...

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