AssetRating

ArchitecturalDesign

CodeCompliance

RetrofitDesign

UtilityIncentives

LEED

ModelPredictiveControl

Policy Analysis

M&V

HVACandControlDesign

AmirRoth,Ph.D.amir.roth@ee.doe.gov

BTO’sBuildingEnergyModelingProgramOverviewBTOPeerReview2017

2

BEM– TheUltimate(Meta)ECM

BEMindesign• Potentialtosave0.7quad/yearby2030• Payback<<1yearandsometimes instantaenous• https://energy.gov/eere/buildings/articles/shockingly-short-payback-energy-modeling

AssetRating

ArchitecturalDesign

CodeCompliance

Retrofitdesign

Utility Incentives

LEED

Model PredictiveControl

Policy Analysis

M&V

HVACandcontroldesign

Source:HOK

3

LogicModel,MYPP,andGoals

Industry&marketareconfident inBEM&regularlyuse ittodesign&operateenergyefficientbuildings

Characterizedaccuracy:ASHRAE140

State-of-the-artopen-sourceplatform:EnergyPlusSOEPRadiance, THERMOpenStudio

Resources&partnerships:IBPSA,ASHRAE,AIA

Design&operationEUIreduction = %GSFdesigned

and/oroperatedXApp#&productivity

Professional#&productivity

IndustryconfidenceXX

Increasedadoption

3rd-partyapps&services

Improveddeveloper&userproductivity

Moreprofessionals

Moreconsistent, higher-qualitydeliverables

Increasedconfidence

ProgramOutputs MarketOutcomes Uber Outcome

2020goals• BEMfornewconstructionGSF:70%(now:76%),EnergyPlus:5%(7%)• Savingsovercode:EnergyPlus:20%(20%)• 3rd-partyEnergyPlustools:12(8)

4

Apps:use-casespecific• Open-sourceorproprietary• Public,private,ormixed funding

BEM industry adapting to (& adopting) open-source!

TheDream-catcher

Platform:general• Commercial-friendly open-source• State-of-the-art capabilities• Commercial-grade development &support• Long-termcommitment• Public funding– transparency&impartialitymatter!• FocusBTOresourceshere

5

ThePlatform:EnergyPlus&OpenStudioEnvelope Constructions,loads

schedules,etc.HVACtemplates

orcustomsystemsRun,compare,report,QAQC,

&parametricanalysis

EnergyPlus(energyplus.net)• Industryleadingsimulation engine

OpenStudio(openstudio.net)• Softwaredevelopment kit(SDK)&demoapplication• Measures, AmazonEC2image&moremeasures

High-valuepackage• Greatofferingtomarketpartners(vendors,utilities, etc.)• Helpsstreamline BTO’sownBEMwork• Servesastemplate forotherBTOBEMprojects

Daylighting

6

Today’sAgendaProgramupdates(me)• EnergyPlusandOpenStudioupdates– notbeingreviewedthisyear• Programaccomplishments &futuredirections

Reviewsofotherprojectsinportfolio(PIs)• AIA2030DDx– benchmarkandtrackingBEMindesign• Spawn-of-EnergyPlus(SOEP)– next-generation simulation/controls product• Validation&UncertaintyCharacterization – groundtruth• Fenestration: THERM– thermalcharacterizationoffacades• Morefenestration: Radiance – detailed lightingsimulation• NRG&Lucid– helping smallbusinesses developnewcapabilities

7

EnergyPlusUpdatesDataCenter• ITE,CRAC,controls

Residential• Ground-coupling, integratedheat-pumps,multiple air-systemsperzone,ductradiation• V8.7(March2017)willbeMVP(minimum viableproduct)forresidential modeling

JSONinput• Firststepinmodernizing input,output&errorhandling

DOASconfigurations

Shadingspeedups

HybridModeling!

8

EnergyPlusUpdates– “HybridModeling”BetterName:“SelectiveInverseModeling”or“HybridCalibration”• Conventional heat-balance (HB)equation calculates zonetemperature timeseries• Zonetemperaturetime serieseasytoobtainfromBAS&smartthermostats• InvertHBtotaketemperatureasinput…andcalculate onetraditional inputasoutput• Usefulwhensaid input ishardertoobtainthanzonetemperature,e.g.,infiltration

• Moreaccuratethanconventionalcalibration…andcanbecombinedwithit!• S-H.Lee&T.Hong,“HybridModeling”, Building Simulation2017.

a)Conventionalcalibration

b)Hybridcalibration

Infiltration???

HVACsystem Energyuse???

Zonetemp???Occupancy???

Measuredzonetemp= Infiltration??

HVACsystem Energyuse??

Zonetemp??Occupancy??

Measuredzonetemp

HVACsystem Energyuse???

Infiltration

Occupancy???

Infiltration

HVACsystem Energyuse?

Zonetemp?Occupancy???

9

OpenStudioUpdates– OpenStudio2.0

Developer-centricre-factorofOpenStudio1.X• Twonewfileformats:OSW(singlemodelworkflows),OSA(largescaleanalysis)• CommandLine Interface(CLI)– 150MBself-contained OSWexecutionmachine• Meta-CLI– OSA➔ (many)OSWtranslationmachine• Server2.0— elastic,multi-cloud image,runslocallyalso• Modular installer– install onlythepieces youwant• …/articles/finally-major-update-openstudio

10

OpenStudioUpdates– PAT2.0

Newfront-end• Qt➔ electron.io (JavaScriptinbrowser)• Localorwebapplications• Nodependences (everysystemhasabrowser)• HowwewilldoUIfromnowon

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openstudio-standards“gem”(rubygems.org/gems/openstudio-standards)• Functionsforcreating&applyingASHRAE90.1constructions, schedules, systems,etc.• Data(insulation levels,equipment efficiencies, etc.)inExcelSpreadsheet

1)CreateDOEPrototypeBuilding• {Type,CZ,Code-Version }è Prototype-Model

2)CreatePerformanceRatingMethodBaselineBuilding• {Type,CZ,Code-Version,Model}è “Appendix G”Baseline-Model• Adaptable toothercodes:CanadaNECB,IndiaECBC,IECC?Title 24?• Reduces tedium,confusion, inconsistency,and“cheating”• Movesefforttowardsmorecreative,constructiveBEMtasks• …/articles/new-openstudio-standards-gem-delivers-one-two-punch

OpenStudioUpdates– OpenStudio-Standards

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ProgramSummary&PlansCorefunding• ET:$4,600k– EnergyPlus,SOEP,ASHRAE140,EmpiricalValidation, FenestrationTools• CBI:$1,500k– OpenStudio• CC:$500k– AIA2030,Scout,“Decision Science”

Startsandstops• TwoBENEFITprojectsending:grey-boxRTUmodels, selective inversemodeling• ThreeBENEFITprojectsstarting:MOISTHERM,OpenBuildingControl, DataCenterToolkit• TwoCBIFOAprojectsstarting:OpenEfficiency,BayREN BRICR

ForwardEmphasis• Control/operations applications➔ EnergyPlus-to-SOEPresourceshift• Connectivitywith(BTO)dataecosystem• Connectivitywithfenestration/envelope modeling ecosystem• District- andurban-scale (LDRD)➔ bettercommunities alliance (BCA)• More,smaller competitive awards• Leveragingexternalresources

13

AdditionalReading&Writing

Sincelastpeerreview• EnergyPlus&OpenStudioexceeding 35,000downloadsperversion• Newannual-simulation productsfromAutodesk&Sefaira• Re-launchofsimuwattenergyauditor• LaunchofNEEA/BetterBricks SPARK• CaliforniautilityeTRM movingtoEnergyPlus/OpenStudio• Scoutalpha&beta• Newfellow,JanetReyna(janet.reyna@ee.doe.gov): large-scalemodeling, data-ecosystem

Resources• Website:…/building-energy-modeling/ (updatedcontent including“BEM101”series)• Blog:…/end-use-breakdown-building-energy-modeling-blog• MYPP:.../downloads/multi-year-program-plan (updates inprogress)• RevisedRD&DRoadmap:comingsoon-ish• Email:amir.roth@ee.doe.gov