Data Center Commissioning: Lessons Learned in a Design/Build
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Transcript Data Center Commissioning: Lessons Learned in a Design/Build
2014 Commissioning Energy Conference
Las Vegas, NV
Derek De Jesús, CxA, LEED AP
Jeff Jameson, PE
Identify
potential conflicts between the
Commissioning Agent and the design/build
team.
Identify the process implemented, scope
required, and the value added for the Owner.
Highlight the challenges encountered and
modifications to the Commissioning process
that occurred in order to achieve the project
goals.
ASHRAE 90.4P review
• How many data centers exist?
– 2011 – 509,147 1
• Electricity Consumption
– Doubled from 2000 to 2005 2
– Increased 56% from 2005 and
2010 2
– Range 100W to 400W /sq ft 3
• Operating temperatures4
– 2004 – 72 deg F
– 2008 – 81 deg F
1 – Emerson Network Power (http://www.emersonnetworkpower.com/enUS/About/NewsRoom/Pages/2011DataCenterState.aspx)
2 – Jonathan Koomey, July 2011, http://www.koomey.com/post/8323374335
3 – Data Center Knowledge, April 2012,
http://www.datacenterknowledge.com/archives/2012/04/25/6-questions-for-yournext-data-center-provider/
4 - ComputerWorld, January 2010,
http://www.computerworld.com/s/article/9144466/Data_center_density_hits_the_w
all
ACG
Process but Speak up and be heard
Integrate Commissioning early and often
Expect the same project goals
PUE (Power Usage Effectiveness)
CFD (Computational Fluid Dynamics)
OPR (Owner’s Project Requirements)
Tier rating
More
meetings; site attention
Contracting
– Owner or
DB/C?
OPR, BOD developed?
Blended phases!
Fast paced…ambiguous
schedule
Reduced documentation
trail
Improved
access to team
and owner
Eager and attentive
installing contractors
Cooperation
Identifying
the team!
gaps, supporting
Design
reviews
How many and when?
Comment responses
Submittal
reviews
Approved unless otherwise stated
Schedule
PFC
Acceptance
Integration
Startup
BAS Pt-Pt
TAB
FPT
Expand
Grounding, lightning protection
Life safety systems
the systems to be Commissioned
VESDA
Pre-Action
Energy management systems
Interface(s) to BAS
Reliability,
stability for equipment operations
Electrical
Witness and document NETA testing
Support the scheduling of these tests
Test
testing support
equipment
Data logging
Trending
IR Scanning
Load banking
Beyond
vendor startup
PDU Testing and Trending
57,509
sq ft renovation
6 Pods
4 Pods built out; 2 for
future
6MW
of electrical power
N+1 design for all systems
DB/C = Owner
Brought
on AFTER final design
Still performed a design review
Brought
on AFTER equipment had started
getting delivered
Still performed a submittal review
Immediate
ramp up
Estimated schedule to turnover: 6 months
Vague
scheduling
Reviewing
documents AND
developing documents at the same
time
Addressing design concerns
Electrical
test witnessing not in Cx
scope
Schedule coordination for startup
No one had Cx in budget, but it was
a data center…
B
phase CT was broke from
factory
Testing should have found it
Caused breaker to trip at
75% load
Weather
delays
Existing building conditions
Leaking roof
Strike
delays
No O&M staff on-board during
project
Inadequate service
ground
No training
No witnessing of testing
Two SMARDT 200-ton Oil free centrifugal chillers,
R-134a, 45° CHW, 400 gpm
Each chiller with dual (100-ton each) VFD compressors
Evaporative Condenser with spray pump
Economizer pump package
Dedicated chiller primary pumps
Additional spare in case of emergency replacement
Two VFD secondary pumps
Sized for future data center expansion
Chilled water load monitoring (BTU meter)
Package system controller
Operational
benefits
Secondary pump speed control set
up to maintain critical branch
temperature (or pressure)
Reliability
The system has safety modes
of operation to maintain
continuous operation (sump
dump, emergency sump
heating, react to temperature
control problems, emergency
operation, stand-alone
operation, etc.)
Year
round consistent, cooling capability
High efficiency using the evaporative
condenser
Dry condenser operation for low outside air
temperature (<40° adj.) operation
Wet condenser operation for warmer OAT (>45°
(adj.) operation
Monitoring
of system energy consumption
Spent
more time with contractors completing
the PFCs than just reviewing
Cx meetings became scheduling coordination
meetings
Cx documents proved readiness
Maintained
acceptance
FPTs
ISTs
ISOTs
3 levels of testing to prove
Systems
outside of Scope
Do what you can when you have the time
Show the value, even if its free
Be reasonable
Greatest
single value for electrical Cx….
Advocate for primary current injection testing
Witness the testing
Document the results
Set the breakers per the FINAL Coordination
Study
Energy
Standard for Data Centers and
Telecommunications Buildings
First Advisory Public Review
November 2013
Comments are still in
review
4.2
– Compliance
Either use 90.4P or 90.1
4.2.2
– Compliance Documentation
Many of the requirements the CxA can support
Labeling of equipment, O&M, Inspections
4.2.4
– Inspections
Requires AHJ to inspect
wall insulation after the insulation and vapor retarder
are in place but before concealment
roof/ceiling insulation after roof/insulation is in place
but before concealment
slab/foundation wall after slab/foundation insulation
is in place but before concealment
fenestration after all glazing materials are in place
continuous air barrier after installation but before
concealment
mechanical systems and equipment and insulation
after installation but before concealment
electrical equipment and systems after installation but
before concealment
Section
5 Building Envelope
No methods or standards except to comply with
90.1
6.4.1
– PUE
Only provides Mechanical PUE
Defined by cities yet some major metro areas are
missing
1
2
1 – 42U, 2014, http://www.42u.com/measurement/pue-dcie.htm#What-is-PUE
2 – ASHRAE 90.4P, Page 29, 2013
Summary
No specific mention of Commissioning
No mention of testing to prove energy
consumption
No mention of any Measurement & Verification
Nothing with regards to improving PUE rating
over time
Its all based on Day 0 performance
Engage
in a discussion to clarify and define
expectation upfront
Advocate for Electrical Cx beyond “standard”
services
Understand the potential of 90.4P
Derek De Jesús
National Commissioning Manager
KJWW Engineering
312-931-3703
[email protected]
Jeff Jameson
Mechanical Commissioning Agent
KJWW Engineering
[email protected]