data center commissioning: lessons learned in a design/build environment
DESCRIPTION
Data Center Commissioning: Lessons Learned in a Design/Build Environment. 2014 Commissioning Energy Conference Las Vegas, NV. Derek De Jesús, CxA, LEED AP Jeff Jameson, PE. Learning Objectives. Identify potential conflicts between the Commissioning Agent and the design/build team. - PowerPoint PPT PresentationTRANSCRIPT
DATA CENTER COMMISSIONING:LESSONS LEARNED IN A
DESIGN/BUILD ENVIRONMENT
2014 Commissioning Energy Conference
Las Vegas, NV
Derek De Jesús, CxA, LEED APJeff Jameson, PE
LEARNING OBJECTIVES 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
INTERESTING FACTS
1 – Emerson Network Power (http://www.emersonnetworkpower.com/en-US/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-your-next-data-center-provider/4 - ComputerWorld, January 2010, http://www.computerworld.com/s/article/9144466/Data_center_density_hits_the_wall
• 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
DESIGN/BUILD CX APPROACH 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
DESIGN/BUILD CX CHALLENGES
Contracting – Owner or DB/C?
OPR, BOD developed? Blended phases! Fast paced…
ambiguous schedule Reduced
documentation trail
DESIGN/BUILD CX OPPORTUNITIES Improved access to team
and owner Eager and attentive
installing contractorsCooperation
Identifying gaps, supporting the team!
CX SCOPE OF SERVICE CHALLENGES Design reviews
How many and when?Comment responses
Submittal reviewsApproved unless otherwise stated
Schedule Integration
PFC Acceptanc
eStartup BAS Pt-Pt TAB FPT
CX ADDED VALUE Expand the systems to be
CommissionedGrounding, lightning protectionLife safety systems
VESDA Pre-Action
Energy management systems Interface(s) to BAS
Reliability, stability for equipment operations
MORE ADDED VALUE Electrical testing support
Witness and document NETA testingSupport the scheduling of these tests
Test equipmentData loggingTrending IR ScanningLoad banking
Beyond vendor startupPDU Testing and Trending
CASE STUDY REVIEW 57,509 sq ft renovation
6 Pods4 Pods built out; 2 for
future 6MW of electrical
power N+1 design for all
systems DB/C = Owner
CHALLENGES ENCOUNTERED Brought on AFTER final design
Still performed a design review Brought on AFTER equipment had
started getting deliveredStill performed a submittal review
Immediate ramp upEstimated schedule to turnover: 6 months
Vague scheduling
CHALLENGES ENCOUNTERED Reviewing documents AND
developing documents at the same timeAddressing 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…
CHALLENGES ENCOUNTERED
B phase CT was broke from factory Testing should have found it Caused breaker to trip at
75% load
CHALLENGES ENCOUNTERED
Weather delays Existing building conditions
Leaking roof Strike delays No O&M staff on-board during
projectNo trainingNo witnessing of testing
Inadequate service ground
MECHANICAL SYSTEM 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
MECHANICAL SYSTEM 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.)
ENERGY SAVINGS/GOALS Year round consistent, cooling capability High efficiency using the evaporative
condenser-Dry condenser operation for low outside air
temperature (<40° adj.) operationWet condenser operation for warmer OAT
(>45° (adj.) operation Monitoring of system energy
consumption
MODIFIED PROCESS Spent more time with contractors
completing the PFCs than just reviewing Cx meetings became scheduling
coordination meetingsCx documents proved readiness
Maintained 3 levels of testing to prove acceptanceFPTs ISTs ISOTs
ADDED VALUE Systems outside of Scope
Do what you can when you have the timeShow the value, even if its freeBe reasonable
Greatest single value for electrical Cx….Advocate for primary current injection
testingWitness the testingDocument the resultsSet the breakers per the FINAL Coordination
Study
ASHRAE 90.4P Energy Standard for Data Centers and
Telecommunications Buildings First Advisory Public Review
November 2013Comments are still in review
ASHRAE 90.4P 4.2 – Compliance
Either use 90.4P or 90.1
4.2.2 – Compliance DocumentationMany of the requirements the CxA can
support Labeling of equipment, O&M, Inspections
ASHRAE 90.4P 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
ASHRAE 90.4P Section 5 Building Envelope
No methods or standards except to comply with 90.1
ASHRAE 90.4P 6.4.1 – PUE
Only provides Mechanical PUEDefined by cities yet some major metro
areas are missing
1 – 42U, 2014, http://www.42u.com/measurement/pue-dcie.htm#What-is-PUE 2 – ASHRAE 90.4P, Page 29, 2013
1
2
ASHRAE 90.4P Summary
No specific mention of CommissioningNo mention of testing to prove energy
consumptionNo mention of any Measurement &
VerificationNothing with regards to improving PUE
rating over time Its all based on Day 0 performance
CONCLUSION Engage in a discussion to clarify and
define expectation upfront Advocate for Electrical Cx beyond
“standard” services Understand the potential of 90.4P
QUESTION & ANSWER
CONTACT INFORMATIONDerek De Jesús
National Commissioning ManagerKJWW Engineering
Jeff JamesonMechanical Commissioning Agent
KJWW [email protected]