Quiet Revolution in Energy Savings Dev/quiet revoluti… · Mike Leach,...

MikeLeach,Michael@Scientific‐Air.com,201‐396‐4650TomLeach,Tleach@Scientific‐Air.com,201‐704‐1149CalUretsky,CUretsky@Scientific‐Air.com,201‐988‐1657

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*QuietRevolutioninEnergySavings*SmartBuildingsNJ

TomLeach,Tleach@Scientific‐Air.com,201‐704‐1149CalUretsky,CUretsky@Scientific‐Air.com,201‐988‐1657 2

*SmartBuildingsNJ,DivisionofScientificAir

*ThirdGenerationinHVAC,2ElectricalEngineers*Steam,Oil,Gas,Electric,Heat,AC(electricandabsorption)…*OfficeBuildings,Factories,Warehouses,Schools,Churches,…

*Savingenergybeforeitwas‘in’orGreen.

MikeLeach,Michael@Scientific‐air.com,201‐396‐4650TomLeach,Tleach@Scientific‐Air.com,201‐704‐1149CalUretsky,CUretsky@Scientific‐Air.com,201‐988‐1657

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*Presentation*Basisoftherevolution,enablingtechnologies*EnergyUsebyyearofconstruction*Howtheysellyouenergy,KWH*HowtoSaveEnergy

*Whereareyounow?*Howtogettowhereyouaregoing

*FreeLunch* Comfortlevelsgoup* Complaintsgodown* Productivityimproved* Remotemonitoring&diagnostics

TomLeach,Tleach@Scientific‐Air.com,201‐704‐1149CalUretsky,CUretsky@Scientific‐Air.com,201‐988‐1657

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*NewToolsandSystems,“AslargeachangeasACinthe1960’s”*SophisticatedSolutionsnowcosteffectiveunder200kft.Electronicsandnetworksoftware.* VFDs* BACnet,(IOT,InternetofThings,M2M)* Sensors,Temperature,CO2,Enthalpy* LEDs* BuildingSimulation


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*LinearEnergySavings*ASHRAEcodesCheat Sheet Item 90.1-2004 90.1-2007 90.1-2010 189.1-2011 Worst to best

Heating Efficiency 80% 80% 80% 81%Energy Eff Ratio Cooling Efficiency (EER) 10.3 11.2 11 11.2 9%Integrated Part Load Value Cooling IPLV 11.4

Economizer NR Yes Yes YesService Water Heating SWH Efficiency 80% 80% 90% 80% 0%

Roof Insulation (R value) 15 15 20 25 67%Delta T / Heat Flux Wall (R Value) 13 13 13 13 0%Continuous CI (R value) 3.8 7.7 7.5 10 163%

Slab 10BTU/SF Window U Factor 0.57 0.55 0.42 0.45 27%Solar Heat Gain Coeff. Fraction of solar into building Window SHGC 0.39 0.4 0.46 0.35 11%Lighting Power Density LPD (W/SF) 1.0 1.0 0.9 0.9 11%Energy Use Intensity Avg EUI (kBTU/SF/Yr) 51 47 36 25 104%

Operating Cost Dollars / ft/yr 3.98$ 3.67$ 2.81$ 1.95$ Excess Energy Cost Penalty 2.03$ 1.72$ 0.86$ -$


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*PSE&GBill

KWCharges

SummerPeakWinterPeak

KW5monthpeakKW,12monthpeakKWH,OnPeakKWH,OffPeakKW,TransmissionKW,Generation

23lineitemsonbill


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*ElectricBill*Paytwobuckets,KW(kilowatt)&KWH(kilowatthours)*ReduceKW,Hours,orboth

KW

Hours


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*KWCharges,5monthpeakand12monthpeak* PSE&GispartofPJM


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*Presentation*Basisoftherevolution,enablingtechnologies*EnergyUsebyyearofconstruction*Howtheysellyouenergy*HowtoSaveEnergy



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*ASHRAEAudits* 1.Walkthrough,almostworthless* 2.ModelwithBSOandcomparebillstoexpected* 3.Differenceanalysis,“What’swrongandhowtofix”

* Needdetailed‘asis’plan.* Modelexpectedsavings


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*Plan,BuildingSystemOptimization*Modelbuildingwithrealworlddataforregion.


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*Plan,BuildingSystemOptimization


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*Plan,BuildingSystemOptimization


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*OtherInputintoSimulationModel

Essex NJ Airport Temp, Min/Max

0

20

40

60

80

100

1/1/14 2/20/14 4/11/14 5/31/14 7/20/14 9/8/14 10/28/14 12/17/14 2/5/15 3/27/15


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*Plan,BuildingSystemOptimization*Accuracyiswithin~5%ofthebillforexistingmodeling

* Relativechangesveryaccurate*Doweneedtofixthingstogetbacktothebaseline?


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*Presentation*Basisoftherevolution,enablingtechnologies*EnergyUsebyyearofconstruction*Howtheysellyouenergy*HowtoSaveEnergy



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*BuildingAutomationandControlNetwork,BAC‐net


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*BacNet ElectricMonitoring


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*NewSensorsandSystems*Oldtemperaturecontrolwassimpleon/off

* Temperaturesensorsallowforpartialloadcontrol* CO2sensorsallowbuildingtoautoadjusttoload* EnthalpySensorsallow‘free’cooling

*RequiresCommunications,BACnet*PartialLoadiswherethebigsavingsare

*Wherecontrolmakesadifference


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*Monitoring,Isitdoingwhatitsupposedtodo?


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*ModelOfficeBuilding,30Kft.total,2story*RequiresaBuildingMgmt.System,BACnet*DemandControlReset

*MeasuresworstcaseVAVbox,throttlewideopen* IntegratedEnthalpy

* Economizer*DemandControl

* CO2sensorforfreshairmakeup


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*PreviousBuilding,$81,092EnergyCosts*Outofdatemaintenance,nothingcrazy

*Dirtyfilters(Raisesstaticpressure)*Dirtycoil,(LowersEER)*Economizernotworking

$8,442Excessenergycost,+10%‐ Alotmorethanafewfilterchanges‐ BMSSystemallowsyoutospotchanges


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*Whatwedowithabuildingmanagementsystem*Elevateslevelofcontrolandcomfortpossible

* AdvancedScheduling,* IntegratedEnthalpy,Usefreecooling* DemandControl/CO2,autoadjustbuilding* PeakShaving* DemandAnticipation* Lighting* Security

*Monitorsactualversusexpectedperformance* Optimizetobuildinglimits

*Monitorsactualversushistoricalperformance* Guidesmaintenanceandtroubleresolution

*Allowsremoteaccessandcontrol


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* Implementation1* 3FloorsOfficeBuilding,70Kft.total,CoolingTower,300ton,Paramus* NoVFDs,75heatpumps,2‐ 20HPfans,staged

* 1Clockperfloor* $4.20/ft.‐>$3.66/ft.,$.54/ft.savings,13%,$37,800

* NetworkThermostatsystem* ViewwholebuildingonPC* Better‘stats* Reloadsprogrameverynight,TurnalloffonSunday* Numberoftenetcomplaintsplummeted* FreeLunch,Something/Nothing

Stage2Project(1/12/15)‐ NewCoolingTower‐ 2VFDdrives,Circulatingpump&Fan


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*A CFOlookatthepreviousproject*$80Kinvestment/GoodSavings*HowdoIpayforit?

*Ourjobtohelpyouunderstand

Investment 80,000$

Annual Savings 37,800$

Equipment Life 15

LifeCycle Savings 649,377$

Simple Payback 2.12

IRR 51%

NPV 413,014$

Discount Rate 5%

Utility Increase 3.50%

Term 3.00

Rate 7.8%

Yearly Payment ($30,903)

Total Finance Cost ($92,708)

Cash Flows over the Project

0

10,000

20,000

30,000

40,000

50,000

60,000

70,000

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15


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* Questions


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*Implementation2*50,000ft,2story,ClassB,ParamusNJ*Watersource,Coolingtower

* Fixnightsetback,didn’twork* 50units,7clocks,2wereworking*Didn’thaveapre‐bill

* Postbill$3.20/ft vs$3.67std Investment 2,500$

Annual Savings 23,500$

Equipment Life 15

LifeCycle Savings 450,949$

Simple Payback 0.11

IRR 943%

NPV 301,754$

Discount Rate 5%

Utility Increase 3.50%


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* Implimentation 3* Threebuildings,RentalApts,12/unit* “GasBillskillingus”,“Peoplehavewindowsopen”

* $85Kfor3newboilers* HeatTimerfrom60’s,openloop* Replacedwindows&insulated* Nozonevalves

* Whatwedid,Nochangeofphysicalplant* $30KofControls

* PIDcontrolloopwith4internalsensors* Stagedboilers* #4,30minutesallyear* #3,45minutesallyear* #2,OctobertoMay* #1,alwayson

GasBilldroppedby2/3’sComplaintsdroppedtozero


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*CommonThemeonalltheImplementations*Youhavetoknowwhatasystemiscapableof*Easymoneyisgettingbuildingbackto‘asbuilt’.

* Updatemaintenance* Fixcontrols* Updatesensorsandsystems

*Systemsdegradeslow,peopledon’tknowhowbad* Overrides* Economizers* Stagedperformance

*Comfortisafreebyproduct* Comforthigher* Costslower

*NewTechnologiesgiveusanother15‐20%potential* VFDDrive,Sensors,LEDlights* BuildingManagementSystems


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*CentralSystem


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*LinearEnergySavings


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*Economizer*Coolinghastwoloads,internal&external*Certainconditionscheapertouseoutsideair

*Outsideairhastohavealowerenthalpy,temp&humidity

*Measureinsideandoutside*Useexhaustairtopreheatincoming,50%reclaim

Fresh Air

Return AirSupply Air

Return Damper

Fresh Air Damper Cooling Coil Heating Coil

Roof

Economizer

Rooftop Unit

Quiet Revolution in Energy Savings Dev/quiet revoluti… · Mike Leach,...

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