quiet revolution in energy savings dev/quiet revoluti… · mike leach,...
TRANSCRIPT
MikeLeach,Michael@Scientific‐Air.com,201‐396‐4650TomLeach,Tleach@Scientific‐Air.com,201‐704‐1149CalUretsky,CUretsky@Scientific‐Air.com,201‐988‐1657
1
*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
3
*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
4
*NewToolsandSystems,“AslargeachangeasACinthe1960’s”*SophisticatedSolutionsnowcosteffectiveunder200kft.Electronicsandnetworksoftware.* VFDs* BACnet,(IOT,InternetofThings,M2M)* Sensors,Temperature,CO2,Enthalpy* LEDs* BuildingSimulation
TomLeach,Tleach@Scientific‐Air.com,201‐704‐1149CalUretsky,CUretsky@Scientific‐Air.com,201‐988‐1657
5
*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$ -$
TomLeach,Tleach@Scientific‐Air.com,201‐704‐1149CalUretsky,CUretsky@Scientific‐Air.com,201‐988‐1657
6
*PSE&GBill
KWCharges
SummerPeakWinterPeak
KW5monthpeakKW,12monthpeakKWH,OnPeakKWH,OffPeakKW,TransmissionKW,Generation
23lineitemsonbill
TomLeach,Tleach@Scientific‐Air.com,201‐704‐1149CalUretsky,CUretsky@Scientific‐Air.com,201‐988‐1657
7
*ElectricBill*Paytwobuckets,KW(kilowatt)&KWH(kilowatthours)*ReduceKW,Hours,orboth
KW
Hours
TomLeach,Tleach@Scientific‐Air.com,201‐704‐1149CalUretsky,CUretsky@Scientific‐Air.com,201‐988‐1657
8
*KWCharges,5monthpeakand12monthpeak* PSE&GispartofPJM
MikeLeach,Michael@Scientific‐air.com,201‐396‐4650TomLeach,Tleach@Scientific‐Air.com,201‐704‐1149CalUretsky,CUretsky@Scientific‐Air.com,201‐988‐1657
9
*Presentation*Basisoftherevolution,enablingtechnologies*EnergyUsebyyearofconstruction*Howtheysellyouenergy*HowtoSaveEnergy
*Whereareyounow?*Howtogettowhereyouaregoing
TomLeach,Tleach@Scientific‐Air.com,201‐704‐1149CalUretsky,CUretsky@Scientific‐Air.com,201‐988‐1657
10
*ASHRAEAudits* 1.Walkthrough,almostworthless* 2.ModelwithBSOandcomparebillstoexpected* 3.Differenceanalysis,“What’swrongandhowtofix”
* Needdetailed‘asis’plan.* Modelexpectedsavings
TomLeach,Tleach@Scientific‐Air.com,201‐704‐1149CalUretsky,CUretsky@Scientific‐Air.com,201‐988‐1657
11
*Plan,BuildingSystemOptimization*Modelbuildingwithrealworlddataforregion.
TomLeach,Tleach@Scientific‐Air.com,201‐704‐1149CalUretsky,CUretsky@Scientific‐Air.com,201‐988‐1657
12
*Plan,BuildingSystemOptimization
TomLeach,Tleach@Scientific‐Air.com,201‐704‐1149CalUretsky,CUretsky@Scientific‐Air.com,201‐988‐1657
13
*Plan,BuildingSystemOptimization
MikeLeach,Michael@Scientific‐air.com,201‐396‐4650TomLeach,Tleach@Scientific‐Air.com,201‐704‐1149CalUretsky,CUretsky@Scientific‐Air.com,201‐988‐1657
14
*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
TomLeach,Tleach@Scientific‐Air.com,201‐704‐1149CalUretsky,CUretsky@Scientific‐Air.com,201‐988‐1657
15
*Plan,BuildingSystemOptimization*Accuracyiswithin~5%ofthebillforexistingmodeling
* Relativechangesveryaccurate*Doweneedtofixthingstogetbacktothebaseline?
MikeLeach,Michael@Scientific‐air.com,201‐396‐4650TomLeach,Tleach@Scientific‐Air.com,201‐704‐1149CalUretsky,CUretsky@Scientific‐Air.com,201‐988‐1657
16
*Presentation*Basisoftherevolution,enablingtechnologies*EnergyUsebyyearofconstruction*Howtheysellyouenergy*HowtoSaveEnergy
*Whereareyounow?*Howtogettowhereyouaregoing
TomLeach,Tleach@Scientific‐Air.com,201‐704‐1149CalUretsky,CUretsky@Scientific‐Air.com,201‐988‐1657
17
*BuildingAutomationandControlNetwork,BAC‐net
TomLeach,Tleach@Scientific‐Air.com,201‐704‐1149CalUretsky,CUretsky@Scientific‐Air.com,201‐988‐1657
18
MikeLeach,Michael@Scientific‐air.com,201‐396‐4650TomLeach,Tleach@Scientific‐Air.com,201‐704‐1149CalUretsky,CUretsky@Scientific‐Air.com,201‐988‐1657
19
*BacNet ElectricMonitoring
MikeLeach,Michael@Scientific‐air.com,201‐396‐4650TomLeach,Tleach@Scientific‐Air.com,201‐704‐1149CalUretsky,CUretsky@Scientific‐Air.com,201‐988‐1657
20
*NewSensorsandSystems*Oldtemperaturecontrolwassimpleon/off
* Temperaturesensorsallowforpartialloadcontrol* CO2sensorsallowbuildingtoautoadjusttoload* EnthalpySensorsallow‘free’cooling
*RequiresCommunications,BACnet*PartialLoadiswherethebigsavingsare
*Wherecontrolmakesadifference
TomLeach,Tleach@Scientific‐Air.com,201‐704‐1149CalUretsky,CUretsky@Scientific‐Air.com,201‐988‐1657
21
*Monitoring,Isitdoingwhatitsupposedtodo?
TomLeach,Tleach@Scientific‐Air.com,201‐704‐1149CalUretsky,CUretsky@Scientific‐Air.com,201‐988‐1657
22
*ModelOfficeBuilding,30Kft.total,2story*RequiresaBuildingMgmt.System,BACnet*DemandControlReset
*MeasuresworstcaseVAVbox,throttlewideopen* IntegratedEnthalpy
* Economizer*DemandControl
* CO2sensorforfreshairmakeup
TomLeach,Tleach@Scientific‐Air.com,201‐704‐1149CalUretsky,CUretsky@Scientific‐Air.com,201‐988‐1657
23
*PreviousBuilding,$81,092EnergyCosts*Outofdatemaintenance,nothingcrazy
*Dirtyfilters(Raisesstaticpressure)*Dirtycoil,(LowersEER)*Economizernotworking
$8,442Excessenergycost,+10%‐ Alotmorethanafewfilterchanges‐ BMSSystemallowsyoutospotchanges
TomLeach,Tleach@Scientific‐Air.com,201‐704‐1149CalUretsky,CUretsky@Scientific‐Air.com,201‐988‐1657
24
*Whatwedowithabuildingmanagementsystem*Elevateslevelofcontrolandcomfortpossible
* AdvancedScheduling,* IntegratedEnthalpy,Usefreecooling* DemandControl/CO2,autoadjustbuilding* PeakShaving* DemandAnticipation* Lighting* Security
*Monitorsactualversusexpectedperformance* Optimizetobuildinglimits
*Monitorsactualversushistoricalperformance* Guidesmaintenanceandtroubleresolution
*Allowsremoteaccessandcontrol
TomLeach,Tleach@Scientific‐Air.com,201‐704‐1149CalUretsky,CUretsky@Scientific‐Air.com,201‐988‐1657
25
* 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
MikeLeach,Michael@Scientific‐air.com,201‐396‐4650TomLeach,Tleach@Scientific‐Air.com,201‐704‐1149CalUretsky,CUretsky@Scientific‐Air.com,201‐988‐1657
26
*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
MikeLeach,Michael@Scientific‐air.com,201‐396‐4650TomLeach,Tleach@Scientific‐Air.com,201‐704‐1149CalUretsky,CUretsky@Scientific‐Air.com,201‐988‐1657
27
* Questions
TomLeach,Tleach@Scientific‐Air.com,201‐704‐1149CalUretsky,CUretsky@Scientific‐Air.com,201‐988‐1657
28
*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%
TomLeach,Tleach@Scientific‐Air.com,201‐704‐1149CalUretsky,CUretsky@Scientific‐Air.com,201‐988‐1657
29
* 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
TomLeach,Tleach@Scientific‐Air.com,201‐704‐1149CalUretsky,CUretsky@Scientific‐Air.com,201‐988‐1657
30
*CommonThemeonalltheImplementations*Youhavetoknowwhatasystemiscapableof*Easymoneyisgettingbuildingbackto‘asbuilt’.
* Updatemaintenance* Fixcontrols* Updatesensorsandsystems
*Systemsdegradeslow,peopledon’tknowhowbad* Overrides* Economizers* Stagedperformance
*Comfortisafreebyproduct* Comforthigher* Costslower
*NewTechnologiesgiveusanother15‐20%potential* VFDDrive,Sensors,LEDlights* BuildingManagementSystems
TomLeach,Tleach@Scientific‐Air.com,201‐704‐1149CalUretsky,CUretsky@Scientific‐Air.com,201‐988‐1657
31
*CentralSystem
TomLeach,Tleach@Scientific‐Air.com,201‐704‐1149CalUretsky,CUretsky@Scientific‐Air.com,201‐988‐1657
32
*LinearEnergySavings
TomLeach,Tleach@Scientific‐Air.com,201‐704‐1149CalUretsky,CUretsky@Scientific‐Air.com,201‐988‐1657
33
*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