Chris Plum, Mark HancockCenter for Energy and EnvironmentResults from Minnesota’s ExistingBuilding Commissioning Program21...
AIA Quality AssuranceThe Building Commissioning Association is a Registered Provider with TheAmerican Institute of Archite...
Presentation DescriptionCEE administers the state program to perform existing buildingcommissioning (EBCx) on state govern...
At the end of this session, participants will be able to:1. Identify several best practices for Existing Building Commissi...
PBEEEP Created in 2008 by MN State Legislature Meet two important needs: Access to technical services that will identif...
Standard Process Application Screening Investigation Implementation Verification21st NCBC ConferencePROGRAM BACKGROUN...
Unique features of a State Sponsored program Competitively Bid Phases Scope of work was well defined List of typical me...
Distinctive Uses Community Colleges Prisons Laboratories Armories Museums State Offices Parking Garages21st NCBC Co...
State Government Buildings CBECS Estimates for MN 825 buildings over 50,000square feet 45 buildings can be rated byEnerg...
21st NCBC ConferenceSELECTION FOR INVESTIGATIONSelf- selection followed by screening> 50,000 sq ft Applied and Screened In...
Key attributes Need one or more of these Building Automation withDDC capable of trending Trend 1,000 or more points ata ...
Period 2010-2012 for both programs PBEEEP Results of Studies 17,800,000 kWh found 95,000 Dt found $21.07 per MMBtu L...
21st NCBC ConferencePBEEEP WORKED ACROSS MANY UTILITYTERRITORIES 37 different utility companies 3 offer study rebates 2...
21st NCBC ConferenceSummary of Most Commonly IdentifiedEnergy Savings MeasuresNumber Finding TypePayback(years)Affectedare...
21st NCBC ConferenceHIGHLY SUCCESSFUL OVERALLEXCELLENT SAVINGS AND HIGH PARTICIPATION Program Wide Savings of 7.2% Could...
21st NCBC ConferenceQUALITY ASSURANCE PROCESS RESULTSMeeting the base standard for a final reportExpected Process Actual P...
21st NCBC ConferenceInvestigation payback is the payback period based only onthe investigation cost;Implementation payback...
21st NCBC ConferenceResults of Calculation ReviewsSAVINGS CALCULATIONS REQUIREDREVISION MOST OF THE TIMEInitial submitted ...
21st NCBC ConferenceThe unequal distribution of savings due to measures associated with economizeroperations is seen as on...
21st NCBC ConferenceThe scale for all the reported savings graphs is the same.Controls includes adjustments and strategies...
21st NCBC ConferenceIF YOU COULD CHANGE ONE THING, WHATWOULD IT BE?Have a method for selecting previously trained provider...
21st NCBC ConferenceThe cost of screening, investigation and administration (includingquality control) were near the expec...
21st NCBC ConferenceThe number of long (> 3 year) payback items that wereselected for implementation was encouraging as it...
21st NCBC ConferenceQualified providers who understand the specialty ofexisting building commissioning are essential to id...
21st NCBC ConferenceCenter for Energy and EnvironmentGustav Brandstrom, PE Tim Ellingson, PENeal Ray Angela Vreeland, PERu...
THANK YOUMark Hancock, PE mhancock@mncee.orgChristopher Plum cplum@mncee.orgCenter for Energy and Environment
Poster child site MN History Center 20 Years old Museum, 490,000 ft2 Site EUI dropped from 159in 2009 to 78 in 2012 3...
Major BAS upgrade 2 years beforeLighting study rejected by client Used waste heat from chiller toeliminate need for summe...
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Results from minnesota’s existing building commissioning program

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Results from minnesota’s existing building commissioning program

  1. 1. Chris Plum, Mark HancockCenter for Energy and EnvironmentResults from Minnesota’s ExistingBuilding Commissioning Program21st National Conference on Building Commissioning
  2. 2. AIA Quality AssuranceThe Building Commissioning Association is a Registered Provider with TheAmerican Institute of Architects Continuing Education Systems (AIA/CES).Credit(s) earned on completion of this program will be reported toAIA/CES for AIA members. Certificates of Completion for both AIAmembers and non-AIA members are available upon request.This program is registered with AIA/CES for continuing professionaleducation. As such, it does not include content that may be deemed orconstrued to be an approval or endorsement by the AIA of any materialof construction or any method or manner of handling, using, distributing,or dealing in any material or product.Questions related to specific materials, methods, and services will beaddressed at the conclusion of this presentation.21st NCBC Conference
  3. 3. Presentation DescriptionCEE administers the state program to perform existing buildingcommissioning (EBCx) on state government buildings inMinnesota.Investigations of 227 buildings containing nearly 19 million squarefeet located on 50 sites throughout the state were performed.The participation rate in the program is very high, which providesa useful measure of the potential for broadly implemented EBCxprograms.Several best practices for program managers were identified.We included a rigorous quality assurance process which resultedin a number of lessons learned, especially the need for ameaningful provider certification if customers are to receiveconsistent, high quality EBCx projects.21st NCBC Conference
  4. 4. At the end of this session, participants will be able to:1. Identify several best practices for Existing Building Commissioning1. Requires specialized training2. Would benefit from a rigorous certification process2. Understand how to identify buildings where EBCx can be effective1. Cost effectiveness of the investigation must be considered3. See how quality assurance improves customer outcomesLearning Objectives21st NCBC Conference
  5. 5. PBEEEP Created in 2008 by MN State Legislature Meet two important needs: Access to technical services that will identify savings Access to funding to implement identified savings Designed in partnership with PECI Providers were selected before program development21st NCBC ConferencePROGRAM BACKGROUND“Public Buildings Enhanced Energy Efficiency Program” = PBEEEP
  6. 6. Standard Process Application Screening Investigation Implementation Verification21st NCBC ConferencePROGRAM BACKGROUND“Public Buildings Enhanced Energy Efficiency Program” = PBEEEPApply Screen Investigate Implement Verify
  7. 7. Unique features of a State Sponsored program Competitively Bid Phases Scope of work was well defined List of typical measure had to be checked Equipment was listed in detail All energy consuming equipment Anything that affected the energy consuming equipment State statute limited measures to 15 year payback or less21st NCBC ConferencePROGRAM BACKGROUND“Public Buildings Enhanced Energy Efficiency Program” = PBEEEP
  8. 8. Distinctive Uses Community Colleges Prisons Laboratories Armories Museums State Offices Parking Garages21st NCBC ConferenceCHARACTERISTICS OF THE BUILDINGSState Government Buildings
  9. 9. State Government Buildings CBECS Estimates for MN 825 buildings over 50,000square feet 45 buildings can be rated byEnergy Star 9 State Agencies Distance:10 to 300 miles21st NCBC ConferenceCHARACTERISTICS OF THE BUILDINGSState Government Buildings 4,600 buildings over 50,000square feet 1,800 over 100,000 sq. ft. 542 ENERGY STAR labeledbuildings with 102,873,953square feet 1.8% of US Building stock
  10. 10. 21st NCBC ConferenceSELECTION FOR INVESTIGATIONSelf- selection followed by screening> 50,000 sq ft Applied and Screened InvestigatedAll State Government Buildings51.4 million sq ft3,047 buildings1,428 sites4,860 MMBTU18.3227502,08734.3550 bldgs71 sites3,000MMBtu44 million sq ft825 buildings145 sites4,345 MMBtuProcessed thru PBEEEP90%11%44% of all of all energy
  11. 11. Key attributes Need one or more of these Building Automation withDDC capable of trending Trend 1,000 or more points ata time 15 minute interval Memory for several hundredthousand points Remote access highlydesirable Observed potential foroptimization Motors > 10 HP Variable OccupancySchedule EUI >80 kBtu/ft2yr21st NCBC ConferenceSCREENING CRITERIADeveloped over the course of the program
  12. 12. Period 2010-2012 for both programs PBEEEP Results of Studies 17,800,000 kWh found 95,000 Dt found $21.07 per MMBtu Large MN Utility Results of Implementation 29,600,000 kWh saved 58,000 Dt saved $23.65 per MMBtu21st NCBC ConferencePBEEEP IS A UTILITY SCALE PROGRAMComparison with large state utility program
  13. 13. 21st NCBC ConferencePBEEEP WORKED ACROSS MANY UTILITYTERRITORIES 37 different utility companies 3 offer study rebates 27 of 71 sites had one utility for electric and gas Means 2/3 have two utility companies All sites had both electrical and gas (or district)savings Coordination of programs is uncommon
  14. 14. 21st NCBC ConferenceSummary of Most Commonly IdentifiedEnergy Savings MeasuresNumber Finding TypePayback(years)Affectedarea (%)Site energysavings(kBtu/ft2yr)135 Time of day enabling is excessive 1.1 66% 3.397 Economizer operation not optimal 4.4 71% 2.088 Excess enabling of equipment 0.7 68% 2.188 Retrofit - Efficient Lighting 8.2 33% 1.244 Zone setup/setback 0.9 16% 2.623 Other controls 11.3 14% 3.121 Lighting on more hours than necessary 4.7 12% 1.121 Other retrofit (mostly faucet aerators) 1.9 10% 0.817 Deferred maintenance 2.9 12% 1.214 Leaky/stuck valve 1.9 4% 3.9116 All others 6.7 107% 1.7664 Total 3.9 412% 2.1Note that an affected area of 412% means therewere 4.1 measures per building, on average
  15. 15. 21st NCBC ConferenceHIGHLY SUCCESSFUL OVERALLEXCELLENT SAVINGS AND HIGH PARTICIPATION Program Wide Savings of 7.2% Could we do even better?Source # Projects Savings/project2010 NCBC (PECI) 122 3.0 kBtu/ft2PBEEEP 50 8.1 kBtu/ft2Building Population Energy used in Bldgs>50,000 ft2ParticipationAll MN (CBECS) 47,600 MMBtu ?Minnesota Government 4,345 MMBtu 2,087 MMBtu = 48%
  16. 16. 21st NCBC ConferenceQUALITY ASSURANCE PROCESS RESULTSMeeting the base standard for a final reportExpected Process Actual Process Investigation Mid Point Review Investigation Final Review 6-9 month process Midpoint review onlysubmitted 50% of time 4.1 total review cycles 18 month process Final reviews requiredsignificant reworkQA Process found many issues to address
  17. 17. 21st NCBC ConferenceInvestigation payback is the payback period based only onthe investigation cost;Implementation payback is based only on the cost ofimplementationPROJECT PORTFOLIOSProvider Sites Buildings AreaInvestigationCost Savings $Million BTUSavedInvestigationPaybackImplementationPayback kbtu/sftA 8 34 2,706,030 520,500$ 270,803$ 32,946 1.9 5.0 12.2B 7 29 2,546,229 458,813$ 247,497$ 24,976 1.9 3.5 9.8C 9 36 2,534,193 442,158$ 239,668$ 22,129 1.8 5.3 8.7D 7 39 3,555,996 556,810$ 292,120$ 25,983 1.9 4.3 7.3E 4 15 1,964,321 296,000$ 150,075$ 13,555 2.0 1.4 6.9F 5 23 2,098,880 323,777$ 126,350$ 12,070 2.6 1.6 5.8G 9 42 3,083,884 582,111$ 224,689$ 15,903 2.6 2.6 5.2Total 49 218 18,489,533 3,180,169$ 1,551,202$ 147,562 2.1 3.7 8.0
  18. 18. 21st NCBC ConferenceResults of Calculation ReviewsSAVINGS CALCULATIONS REQUIREDREVISION MOST OF THE TIMEInitial submitted savings calculations were reduced by an average of 34% 14% of submitted results were within 2% ofapproved value 20% were below the approved value and thereported savings were INCREASED 66% were above the approved value and thereported savings were DECREASED
  19. 19. 21st NCBC ConferenceThe unequal distribution of savings due to measures associated with economizeroperations is seen as one of the strongest signs that not all providers were equally wellprepared to do EBCx workCOMPARING SCHEDULING ANDECONOMIZER MEASURESDegree of difficulty shows need for certification0123456A B C D E F GkBtu/sq.ft.ProviderScheduling
  20. 20. 21st NCBC ConferenceThe scale for all the reported savings graphs is the same.Controls includes adjustments and strategies including all resetschedules (HW, CHW, SAT, DSP), controls hunting, and all VFD issuesSAVINGS FROM CONTROLS MODIFICATIONSWERE DISAPPOINTING (7% of total)Again, almost no findings from three providers0123456A B C D E F GkBtu/sq.ft.ProviderControls
  21. 21. 21st NCBC ConferenceIF YOU COULD CHANGE ONE THING, WHATWOULD IT BE?Have a method for selecting previously trained providersA recognized certification process would deliver this
  22. 22. 21st NCBC ConferenceThe cost of screening, investigation and administration (includingquality control) were near the expected value, but the cost ofimplementation was lower.The cost of implementation is consistent with other EBCx programsPROGRAM CAME IN UNDER BUDGETEven the rigorous QA process did not exceed its target cost and it helpedlower total program costsActualBudgetScreeningInvestigationAdmin/QAImplementation
  23. 23. 21st NCBC ConferenceThe number of long (> 3 year) payback items that wereselected for implementation was encouraging as it affirmedthe idea of bundling high and low payback items forincreased total savings.PROGRAM SUCCESS:RATE OF IMPLEMENTATION IS HIGHDue to fast payback and confidence that savings will be realized
  24. 24. 21st NCBC ConferenceQualified providers who understand the specialty ofexisting building commissioning are essential to identifyall the potential savingsA good customer relationship will increase the rate ofimplementationPrograms should address all energy sources at a siteCareful selection of buildings is necessary for a cost-effective program; some buildings have minimal savingsopportunities.BEST PRACTICES AND LESSONS LEARNEDWithout a quality assurance process, we would not have known….
  25. 25. 21st NCBC ConferenceCenter for Energy and EnvironmentGustav Brandstrom, PE Tim Ellingson, PENeal Ray Angela Vreeland, PERuss Landry, PE Christie TraczykPam KlocekState of MinnesotaDepartment of Administration, Real Estate and Construction ServicesDepartment of Commerce, Division of Energy ResourcesUS Department of EnergyAmerican Recovery and Reinvestment Act FundsTHANK YOUTo the entire team
  26. 26. THANK YOUMark Hancock, PE mhancock@mncee.orgChristopher Plum cplum@mncee.orgCenter for Energy and Environment
  27. 27. Poster child site MN History Center 20 Years old Museum, 490,000 ft2 Site EUI dropped from 159in 2009 to 78 in 2012 3.2 year payback21st NCBC ConferenceEXISTING BUILDING COMMISSIONINGCase Study of Success
  28. 28. Major BAS upgrade 2 years beforeLighting study rejected by client Used waste heat from chiller toeliminate need for summer boiler Revised schedule at the space,not building, level (12 AHU’s) Added VFDs Cafeteria grill ventilation interlock Low flow faucets (300 kids perday)21st NCBC ConferenceScheduling: Not just reading the hours posted onthe front doorMinnesota History CenterEnergy Saving Opportunities
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