existing building commissioning - bcxa · existing building commissioning. tom poeling, p.e., cem,...
TRANSCRIPT
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Existing Building Commissioning
Tom Poeling, P.E., CEM, CCP2019 BCxA President
U.S. Engineering Company
Director of Quality Assurance
Seminar 33: The Value of Building Commissioning Study
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• Present the results of a joint BCxA/LBNL study that provides updated metrics on the value of (EBCx) commissioning.
• Provide data that can be used by commissioning stakeholders to promote the industry.
• Understand market opportunities to improve the commissioning industry.
• Understand Cx scope of work improvements to improve delivery process.
Learning Objectives
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Funding by U.S. Department of Energy grant.Lawrence Berkeley National Laboratory:Dr. Jessica Granderson, Eliot Crowe, Claire Curtin, Dr. Evan Mills
Building Commissioning Association (Staff):Liz Fischer, Diana Bjornskov, Sheri Adams, Nicole Gardner, Aimee Brown
BCxA Task Force:David Lewis, Matt Malinosky, Rock Ridolfi, Louis Starr, Ben Hixson, Frank Carleo, Colin Moar, Philip Sauod, Jack Schirpke, Richard Young
BCxA Marketing Committee:Candice Rogers, Tony DiLeonardo, Alyssen Nassif, Dan Forino
Acknowledgements
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4
Prior LBNL Studies – Cost Effectiveness of Commercial Building Commissioning
(2004)
(2009)
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• Refresh the LBNL 2009 survey • Maintain consistency in the dataset• Reflect changes to the industry due to maturity• Define effects of changes to Cx approach (such as Ongoing Cx)• Include economics for Cx of new and additional systems• Expand database for different building types, markets
• Establish new baseline for Cx metrics
• Identify appropriate level of data to gather
• Create an iterative process for data gathering
• Engage industry to provide more feedback over time on project level and market level trends
5
Value of Commissioning Study - Goals
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6
Value of Commissioning Study
Data Survey (NCCx, EBCx, OCx)
• Project Specific Description• Reason for Cx• Deficiencies & Measures
• Cx Cost Data• Scope of Cx• Baseline Energy Use &
Savings
• Non-Energy Impacts
Market Survey • Company information• Certification• NCCx Market Factors• NCCx SOW Tasks• EBCx Market Factors• EBCx Economics• EBCx SOW Tasks• OCx Economics• OCx SOW Tasks
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7
Value of Cx Study - Phases
LBNL
BCxAReview Market Survey
Research Market Databases
Created Market SurveyPL
ANN
ING
Provide Data Survey
Coordinated scope/grant with DOE
Reviewed Data Survey
DAT
AAC
QU
ISIT
ION
ANAL
YSIS
"Gimme Five" CampaignBCxA MembersUtility Providers
Data Survey Form sent toUtility Providers
Market Survey sent toBCxA Members
Organize/QC Data Survey
Create Data Graphs
Create Preliminary Presentation
Create Deliverables, Presentations
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8
Data Survey StatisticsNew Construction Cx 2009 Study 2018 Study
# of Buildings 82 101# of Projects (w/cost data) 74 71Floor Area (SF) 8,813,925 22,217,059Construction Cost $2.2B $10.1B# of States Represented 10 18
Existing Building Cx 2009 Study 2018 Study
# of Buildings (total) 562 738# of Projects (w/energysavings data)
300 705
Floor Area (SF) 90,410,884 252,159,847# of States Represented 21 18
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Discussion Topics
9
• Building data: Preliminary narratives regarding CxValue metrics
1. EBCx – Cost Summary2. EBCx – Market Demand Factors 3. EBCx – Scope of Work Observations
• Review Data Survey Results• What’s Changed? • Check Calibration• Market Drivers & Issues
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EBCx Cost per Square Foot
N = MedianUtility_1 414 $0.17
Non-Utility 36 $0.24Utility_2 156 $0.42
Utility_MBCx 54 $1.61
$0.26 Median overall
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EBCx Cost per Square Foot (Bldg. Size)
$0.26 Median overall
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Median nUtility_1 5% 326Utility_2 7% 156
Utility_MBCx 9% 41Other_EBCx 14% 107
EBCx Percent Savings by Project Type
• Median energy savings = 6%• Utility typical range = 3 to 11%• 2018 median less than 2009
savings of 10%
n=533
n=107
n=41Median 6% (all data)
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EBCx Percent Savings by Project Type
8.5%
22.0%
46.3%
22.0%
1.2%
Less than 5% 5 to 10% 10 to 20% 20% to 30% More than 30%0%
5%
10%
15%
20%
25%
30%
35%
40%
45%
50%
Median energy savings = 12%
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-
5
10
15
20
25
30
35
Sim
ple
Payb
ack
(Yre
ars)
(n=300 bldgs.)
EBCx Simple Payback (Years)
2.2
1.1
201825th Percentile 1.3
Median 2.275th Percentile 4.2
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EBCx Implementation by Payback
• 2 year payback or less: Implemented 55%• 3 to 4 year payback: 34%• 5 year payback or greater: 18%
0%5%
10%15%20%25%30%35%40%45%
less than 10% 10 - 20% 20 - 40 % 40 - 60% 60 - 80% Greater than80%
2 years or less payback 3 to 4 years payback 5 year payback
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Reasons for Implementing EBCx
0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
Other
Reduce liability
Research/demonstration/pilot
Comply with existing buildings ordinance
Increase occupant productivity
Extended equipment life
Comply with organizational mandate/policy
Comply with LEED or other rating system
Participation in utility program
Train/increase awareness of operators or occupants
Qualify for rebate, financing, or other services
Ensure adequate indoor air quality
Ensure or improve thermal comfort
Ensure system performance
Obtain energy savings
Fraction of reporting projects with reason (EBCx), 2009 vs. 2018
2009 2018
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0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
Other
Reduce liability
Research/demonstration/pilot
Comply with existing buildings ordinance
Increase occupant productivity
Extended equipment life
Comply with organizational mandate/policy
Comply with LEED or other rating system
Participation in utility program
Train/increase awareness of operators or occupants
Qualify for rebate, financing, or other services
Ensure adequate indoor air quality
Ensure or improve thermal comfort
Ensure system performance
Obtain energy savings
Fraction of reporting projects with reason (EBCx), 2009 vs. 2018
2009 2018
Reasons for Implementing EBCx
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Were Cost and Energy Savings calculations included with EBCx?
Never Rarely Sometimes Often Always0%
5%
10%
15%
20%
25%
30%
35%61%
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Significant repairs before EBCx?
Never Rarely Sometimes Often Always0%
5%
10%
15%
20%
25%
30%
35%
40%
45%
45%87%
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How often is TAB included?
Never Rarely Sometimes Often Always0%
5%
10%
15%
20%
25%
30%
35%
40%
75%
36%
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Level of TAB investigation
Central plant only AHUs only Central plant and AHUs Including someterminal unitequipment
Including all terminalunit equipment
0%
5%
10%
15%
20%
25%
30%
35%
40%
45%
53%
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35.1%
16.4%
19.6%
11.9%
13.1%
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
Cont
ribut
ion
to O
vera
ll Pr
ogra
m S
avin
gs (%
)
Utility Program EBCx Measure Types (n = 3,695 measures, 503 projects)
Loop Tuning
Calibration
Maintenance - Other
Mechanical Fix
Modify Sequence of Operations
Modify Setpoint
Implement Advanced Reset
Operations & Control - Other
Scheduling
EBCx Measure Mix
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How were EBCx issues addressed?
In-housePersonnel
MechanicalContractor
ElectricalContractor
ControlsContractor
CommissioningProvider
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
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Visit the following website:
https://www.bcxa.org/knowledge-center/value-of-cx-project/
For More Information
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1. Energy Savingsa. Median 6%, typical range 3% to 11% (combined utility and non-utility
EBCx programs)b. EBCx outside utility programs could hit 10% to 25% range c. 2018 median down from 2009, though looking at project type suggests no
major market shift
2. Simple Paybacka. Median 2.2 years. Range generally 1 and 4 years paybackb. Median $0.26 project cost per sq.ft., with a typical range $0.15 to $0.56c. Projects at lower percent savings can still be highly cost-effective
3. Owner’s reasons for implementing EBCx: Top 4 are unchanged from 2009 study
4. EBCx Measures: Top 5 measures account for 95% of all measures
Conclusion
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Bibliography
• Poeling T., Bjornskov D., et.al “Value of commissioning – 2018 market survey”, (2019)
• Crowe E., Mills E., Granderson J., Curtin C., “Building Commissioning Costs and Savings Across Two Decades and 1,500 Projects” (2019)