may 18-19, 2016 cincinnati, oh commissioning otto van ... otto van geet, pe nrel hosted by: federal...
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CommissioningOtto Van Geet, PE
NREL
Hosted by:
FEDERAL UTILITY PARTNERSHIP WORKING GROUP SEMINAR
May 18-19, 2016Cincinnati, OH
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Why Commission?
• Commissioning (Cx) of systems has its roots in ship building – first used to ensure a ship was
seaworthy and ready for service.
• Cx is a specialized application of quality assurance.
• Good cx involves extensive testing and:
– early planning, – continuous coordination, – comprehensive documentation,
and – thorough O&M training.
An analogy to a ship’s sea trials or “shake-down” cruise
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Commissioning Background
• The goals of commissioning are to:
─ Improve energy performance and minimize energy consumption.
─ Reduce operating costs.─ Ensure adequate O&M staff orientation and training.─ Improve systems documentation.
─ Specific to UESC:─ “Performance assurance” rather than “savings guarantee”
assists keeping costs reasonable and appropriate to the project size/ ECM
─ Use a consistent set of procedures/activities to monitor, adjust, and report on ECM performance.
─ utility/agency monitoring, comparison to baseline, makes improvement recommendations, and agency makes adjustments
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Role of Commissioning within a long-term Performance Assurance Plan
1. Cycle of ECM performance assurance
2. Baseline /compare: Existing equipment/system performance and O&M procedures and logs
3. Design & install /adjust: improve equipment/system performance and update O&M procedures and logs
4. Pre-acceptance commissioning: prove performance meets design
5. On going O&M:updated O&M procedures and logs
6. Post-acceptance commissioning:monitor, adjust, assure long-term optimal performance
Baseline /compare to
baseline
Design & install /adjust
Commissioning
On going O&M
Post-acceptance
commissioning
ECM Commissioning Cycle
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Commissioning Comes in a Number of
Styles
Ongoing operation &
commissioning
Existing Building (Retro)
commissioning
UESC
ECM Set
Commissioning
Technical steps and techniques
Field Experience
Design Intent
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Cx Activities for UESC
• Re-commissioning– Performed 5 to 10 years after previously commissioned– Used to help identify deferred maintenance
• Retro-commissioning (RCx)– Performed to existing buildings not previously
commissioned– Usually instigated due to high energy bills or poor
occupant comfort
• Monitoring-Based Commissioning (MBCx)• Continuous-commissioning (CCx)
– Ongoing process to resolve operating problems, optimize energy use and identify retrofits
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Development phase Commissioning Activity
Time
Activity L
evel
Design Phase Construction Phase Warranty0% 100%
Data for the graph courtesy Karl Stum; Summit Engineering
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Construction Commissioning Activity
Time
Activity L
evel
Design Phase Construction Phase Warranty0% 100%
Data for the graph courtesy Karl Stum; Summit Engineering
Desig
n D
evelo
pm
ent
Phase
Develop:
Cx plan
Cx specs
Draft tests
Cx budget
Training plan
Begin Cx focused design review
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Construction Commissioning Activity
Time
Activity L
evel
Design Phase Construction Phase Warranty0% 100%
Data for the graph courtesy Karl Stum; Summit Engineering
Constr
uction D
ocum
ent P
hase
Finalize Cx documents
Continue Cx focused
design review
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Construction Phase Commissioning Activity
Time
Activity L
evel
Design Phase Construction Phase Warranty0% 100%
Data for the graph courtesy Karl Stum; Summit Engineering
Early a
nd M
id-C
onstr
uctionKick-off
Meeting
Review Shop
Drawings
Fine Tune Tests
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Construction Commissioning Activity
Time
Activity L
evel
Design Phase Construction Phase Warranty0% 100%
Data for the graph courtesy Karl Stum; Summit Engineering
Early a
nd M
id-C
onstr
uction
Construction Observation
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Construction Commissioning Activity
Time
Activity L
evel
Design Phase Construction Phase Warranty0% 100%
Data for the graph courtesy Karl Stum; Summit Engineering
Verification a
nd P
resta
rt C
hecks
Functional TestingThe
Heart of
the Cx
Process
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Construction Commissioning Activity
Time
Activity L
evel
Design Phase Construction Phase Warranty0% 100%
Data for the graph courtesy Karl Stum; Summit Engineering
Verification a
nd P
resta
rt C
hecks
Functional Testing
Opposite S
eason T
esting
Tre
nd A
naly
sis
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Responsibility Shifting from Utility to Agency - Commissioning
Time
Activity L
evel
Design Phase Construction Phase Warranty0% 100%
Verification a
nd P
resta
rt C
hecks
Functional Testing
Opposite S
eason T
esting
Tre
nd A
naly
sis
Early a
nd M
id-C
onstr
uction
Data for the graph courtesy Karl Stum; Summit Engineering
Training by
Contractor
Training by Real World
Training by Cx Provider
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Agency fully responsible phase - Commissioning
Time
Activity L
evel
Design Phase Construction Phase Warranty0% 100%
Data for the graph courtesy Karl Stum; Summit Engineering
Ongoin
g C
om
mis
sio
nin
g
Agency fully responsible phase;
utility commitment complete
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Data for the graph courtesy Karl Stum; Summit Engineering
Commissioning Activity
Time
Activity L
evel
Design Phase Construction Phase Warranty0% 100%
Ve
rifica
tion a
nd P
resta
rt C
he
cks
Fu
nctional T
estin
g
Op
posite S
ea
son T
esting
Tre
nd A
na
lysis
Ea
rly a
nd M
id-C
on
str
uction
Ea
rly D
esig
n P
hase
De
sig
n D
eve
lopm
ent P
ha
se
Co
nstr
uction D
ocu
ment P
ha
se
Ongoing Commissioning for the life of the building
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MBCx & AFDD Definitions
• Monitoring-Based Commissioning (MBCx): Use monitored data to assess equipment operation (new or existing buildings), typically ongoing
• Automated Fault Detection and Diagnostics (AFDD): Analytical software that detects specific issues in operation, enabling MBCx.
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Benefits
Studies show that 25% of RCx savings on average can be lost over 4 years without ongoing attention.
*Lawrence Berkeley National Laboratory, June 2009 report - Monitoring-Based Commissioning: Benchmarking Analysis of 24 UC/CSU/IOU Projects
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RCx Issues Identified
Issues/opportunities that can be detected:
• Air-Side OpportunitiesEquipment scheduling, ventilation/economizer control optimization, pressurization and temperature optimization
• Ideal VAV System OperationDuct static pressure and discharge air temperature optimization, morning warm-up control, minimum VAV box flow reduction
• Water Side OpportunitiesTemperature optimization (chilled water, condenser water, heating water), water-side economizer control, pump and pressure control, equipment staging
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Fault Detection & Diagnostics (FDD)
Detailed analytics down to the equipment level
Meter Data
Weather Data
BAS DataDatabase
Cloud based or local software
Analytics provide information for action
Any device with a “pulse”
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Fault Detection & Diagnostics (FDD)
• Data points constantly monitored and stored
• Programmed “rules” automatically detect “faults” or issues over all time
• One way communication – provides information that requires human action
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Fault Detection & Diagnostics (FDD)
• Growing number of tools, not as many as EIS
Examples:
• Purchased as a license: Sky Foundry SkySpark
• SAAS cloud hosted: Climetrics Analytika, Ezenics, KGS Buildings Clockworks, SciEnergyEnergyScape and more…
• Built in to BAS: Growing number of options
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Example Fault - Scheduling
Example rule: “AHU ON During Scheduled Unocc” (Equipment ON when it should be OFF)
AHU-1-1 operating 24/7 from 30%-50% fan speed
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720 KW
1,156 KW
524 KW
449 KW408 KW 94 KW
NREL PV Systems - South Table Mesa Campus
Otto VanGeet 303.384.7369 [email protected]
QUESTIONS?
50 KW