Transcription

BUILDINGRE‐TUNING:THE TWO DAYRETURN ONINVESTMENT

Meet Our Presenters:Maureen Roskoski, SFP,LEED AP O MCorporate SustainabilityOfficer, FEA Eighteen years experience in energy,sustainability and facility management Worked with numerous facilities to achieveLEED for Existing Buildings certification Specializes in sustainable facilitymanagement Leads FEA’s own sustainability efforts Author of 2 IFMA Sustainability “How to”Guides SFP and IFMA Instructor Working with CBEI on Retuning and CareerMap for advanced commercial buildings

Learning Objectives1. Explain the Re‐Tuning process2. Define differences between Re‐Tuning andother conventional energy conservation efforts3. Define Re‐Tuning benefits4. Recognize the benefit in continuous buildingimprovementCredit to CBEI and PNNL

Energy rgy AuditsRetro‐commissioning

0089/1/20087/1/20085/1/2008Energy ConservationEffortsCase Study ‐ Site EUI (Kbtu/SF)65Energy Audit6055504540

Energy ConservationEffortsEnergy ConsumptionTypical commercialbuilding behavior over timePeriodic Re‐tuningEnsures PersistenceContinuous Re‐tuningMaximizes PersistenceTime

What is Re‐Tuning?

Re‐TuningRe‐Tuning Is Going Back To BasicsEducationAwarenessContinualOptimization

Building Re‐tuning:Multiple Paths Observation‐driven – walk through of buildingand equipment following a checklist of visual andsimple measurement checks Guidance for BRT through BAS interface–check for and correct a limited set of operationalcontrol issues within the building automationsystem (BAS) Data‐driven – deeper investigation of many andcomplex control issues from the BAS and energymeters9

Re‐Tuning Basics1.2.3.4.Collect Initial Building InformationPre‐Re‐tuneConduct Building Walk‐downRe‐Tune The Building– Focus tests and corrective actions for mechanicalequipment and controls– Most impactful and can be made with limited timeand resources5. Conduct Post‐Retuning6. Perform Savings Analysis

What should you belooking for in a Re‐TuningWalkdown?

Data Is ImportantBuilding& UsageBasicsCoolingDegreeDaysHeatingDegreeDaysFocus your effortsControlTrends

Re‐Tuning Focus Focus on optimization ofbuilding operations Looking at entirebuilding; all systems plusexterior Tests and correctiveactions that are the mostimpactful and can bemade with limited timeand resources“up to 20% of energyused in commercialbuildings is wastedbecause of improperand inefficientoperations”‐PNNL

Core Principles of Re‐Tuning If you don’t need it, turn it off If you don’t need it at full power, turnit down Make holistic energy decisions whenadjusting systems to the real buildingneeds Save energy without negativelyimpacting the comfort of theoccupants

Core Principles of Re‐TuningIf it is status quo, ask why?

Examples of what to lookfor: Envelope – Weather‐stripping, sealants, etc. Plug Loads/Office Equipment –– What can be unplugged? Lighting Systems and Controls –– Lighting scheduling and overrides HVAC & Controls –– Set points, scheduling, and equipment functionality

How Does Re‐Tuning CompareTo Conventional EnergyConservation Activities?

ComparisonsBuilding Re‐Tuning Data collection/analysis Option of third‐party orin‐house performance Quick to Operations‐focusedimplement Long‐term vision Benchmarking "Easy fixes" Cost savings Existing buildings Low costFlexible scope Identifies opportunities forsavings Energy conservation Greaterunderstanding ofbuilding Deliverable of reportTests functionality Confirms design intent Availability of LEEDpoints Third‐party conductedEnergy AuditCommissioning

ComparisonsDescriptionCostImplementation timeLevel of DetailEffort RequiredDuration of ServiceFrequency of ServiceService ProviderCommissioning*Process HighHigh2‐6 monthsContinuous/3‐5 yearsThird partyEnergy Savings TypesNo/low cost, capital intensiveOutcome/IntentDeliverableAppropriate forVerification/validation of systemoperation, identification ofprogrammable and operationalchangesPlan, reportLarge/complex systemsEnergy AuditEvent Low ‐ HighModerate3‐6 weeks3‐5 yearsThird partyNo/low cost, capital intensive(depending on audit level)Energy & water conservationmeasures, recommendation(project list)ReportAny building/systemASHRAE Procedures forReferenceASHRAE 0‐2013Commercial Building EnergyAudits*references commissioning for existing buildings (retro‐commissioning)Building Re‐TuningProgram LowModerate1‐2 daysContinuousThird party or in‐houseNo/low cost, operational changesImproved operations (decrease costand energy and water usage,increase occupancy comfort)Program, execution planAny buildingPacific Northwest NationalLaboratory

Why is the hands‐onaspect of Re‐tuning soimportant?

Importance of Education 2 Billion in potential operationalsavings from an educated Federal FMWorkforceSource: General Services Administration (GSA) Estimates based on the Pacific Northwest National Laboratory Study “Assessing thePotential for a FEMP Operations and Maintenance (O&M) Program to Improve Energy Efficiency”, 2002

What results can weexpect to see?

ResultsUp to 20% of energy consumption in commercialbuildings is due to inefficient operationsQuadrillion BTUsBuilding Re‐Tuning IdentifiesEnergy Saving Opportunities20181614121086420Savings of upto 3.7 quadsBefore BRTAfter BRT

Common ProblemsIdentified Occupied schedules longer than they need to be Equipment running during unoccupied periods(Exhaust fans) Heating and Cooling set points are too close Weather stripping issues

Successful ImplementationTips Make adjustments during there‐tuning process, don’t deferuntil later Operations staff need to havethe authority to implement thechanges Build confidence inmaintenance staff

Re‐Tuning Case StudyGSA Case Study ‐ William BryantCourthouse Annex Built in 2005 264,842 rsf 9 courtrooms, 19 chambers and officespace for court functions

Key Findings ‐ Annex Automatic‐Reset for Annex HeatingSystems to Run at Design Specifications Corrected Several Continuous Runningfor Lights and Fans Reduce Annex Base Load by Turning offthe Snowmelt Pump in Summer

Re‐Tuning Case StudyJune201528

Real Results from BRT:PNNL Meta‐Analysis 100 buildings underwent re‐tuning usingthe BAS Data‐driven Analysis technique The majority of the buildings were fromlarge portfolio owners and the GSA Annual energy savings ranged between2% to 26%, with a median savings of 15% Annual normalized cost savings rangedbetween 0.05/sf to 0.60/sf, with amedian savings of 0.12/sf29

How do Re‐Tuningefforts engage themaintenance team?

EngagementTraining(Class orConsultantOn‐Site)Engaged &MotivatedTeamContinualOptimization

How Can I Learn MoreAbout Re‐Tuning?

Online ing/lms/

Other Resources CBEI BRT Case nd‐cases/ PNNL resourceshttp://buildingretuning.pnnl.gov/34

Learn MoreClassroom Training:Building Walk‐Down: Experts teach the classroom lectureportion, delving into all aspects ofthe re‐tuning process such asefficiency in data collection,optimize AHUs, economizers, zoneconditioning, central plants, meterprofiles, occupancy schedules, andhow to conduct building walk‐downs Trainees thoroughly walk down thebuilding including review ofenvelope, roof, HVAC equipment,plant area, and BAS front end (forlarge building BRT) to get an in‐person understanding of buildingconditions, design, and operations

Why Building Re‐Tuning? Educated Team Re‐tuning skills can be developed in almost any jobskill set Instant Results Low‐ to no‐cost method for improving yourbuilding’s energy performance and savings money Consistent Program Often results in improved tenant comfort and lesstenant complaints36

SummaryBuilding Re‐Tuning is Re‐Thinking The WayWe Approach Energy Conservation– Think ‐ Stop Wasting– Think – Question the Status Quo– Think – Continual Optimization– Think – Enabling Your Team To Optimize YourBuilding

Questions?Maureen Roskoski, SFP, LEED AP O [email protected]@FEA PC

sustainability and facility management Worked with numerous facilities to achieve LEED for Existing Buildings certification Specializes in sustainable facility management Leads FEA's own sustainability efforts Author of 2 IFMA Sustainability "How to" Guides SFP and IFMA Instructor Working with CBEI on Retuning and Career