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Ensure mission critical data facilities
achieve stated availability targets…
Design to selected Tier Classification
Identify critical systems
Plan for resiliency
Thoroughly test and commission
Optimise systems for efficiency
Monitor for long term benefits
Safeguarding the integrity and security of
data systems is an essential part of a
robust business strategy
www.aem.hk
Data Center
Design Optimisation and
Commissioning
E&M Systems and Design
Elements to be considered include:
Cable distribution, layout and management
Cooling – cooling topologies, chiller, CRAC, cooling
towers, etc.
Power – high/low voltage system, switch system, UPS,
transformers, etc.
Earthing equipotential bonding and lightning protection
Electromagnetic interference, electromagnetic pulse (EMI
/EMP) and tempest
Generator and fuel support systems
Fire protection system
Physical security and access control
Building Management System and controls
Tier I Tier II Tier III Tier IV
Number of delivery paths 1 1 1 Active
1 Passive 2 Active
Redundancy N N+1 N+1 S+S or
2(N+1)
Compartmentalisation No No No Yes
Concurrently Maintainable No No Yes Yes
Tolerant to Worst Event No No No Yes
The Uptime Institute tier
classification system defines
four levels of system availability
and robustness.
Tier III provides a high level of
confidence and for many
represents a reasonable
compromise over the expense of
implementing tier IV.
Facility Resiliency Assessment
Resiliency - the ability of the system to continue
operations in the face of routine maintenance,
equipment failure, power outage and natural
disaster
AEM will carry out the following pre-operational checks:
Full Design Review
Comprehensive Testing and Commissioning
Critical Systems viability
Single system start-up
Integrated system testing covering:
Security
BMS
Central cooling
Fire detection and suppression
Electical systems - primarily
discrimination, UPS, generators,
switchgear, distribution and earthing
systems
Depending on the geographical location increased
consideration may be necessary for critical systems and
components that may need to qualify for seismic certification.
These include transfer switches, switchgear, fire pump
controllers, and other on-site power systems.
Tier Classification and Performance Standard
The system is only as strong as its weakest link
The overall site classification is limited by the infrastructure’s lowest rated aspect
Efficient Electrical Systems
AEM can help with the many items that must come together
to provide an efficient electrical system in a Data Center:
Applying power factor correction
Harmonic Cancellation Transformers limit distortion
to less than 5% at the terminals of equipment
Choosing efficient lighting systems with automatic
controls
Minimizing line and equipment losses by utilizing
higher voltages (such as 600V in lieu of 480V)
Just some of the opportunities available for
electrical system optimisation
CRAC energy minimisation
Computer Room Air Conditioning has to remove the heat
generated by the racks of computer equipment and is highly
energy intensive. Usage, and the resulting cooling load, will
evolve over time so particular care is required in the design
and implementation.
Rack layout for hot-aisle/cold-aisle management, server
density and careful optimisation of airflow using baffles,
ducts and barriers to direct and separate air at different
temperatures are all designed to avoid cold and hot spots.
AEM perform thermographic analysis using temperature
probes and infrared cameras to appraise heat density and
cooling system performance against designs and CFD
predictions.
Cooling measures can be optimised in a number of ways:
Effective humidity and supply temperature control –
novel approaches such as ultrasonic humidification
technology
Design returned hot air temperatures to achieve
optimal CRAC performance
Use of appropriate chilled water setpoints to
increase the efficiency of chillers
Build in VFD Fan Control to reduce bypass air when
CRAC units run in N+1 mode – 20% reduction in air
flow yields 50% energy saving
Optimisation
Given their relatively diminutive physical dimensions, Data Centers are extremely high consumers of energy.
To avoid excessive running costs strategies to control consumption are essential.
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Design systems to handle the current and maximum anticipated load.
Ensure consumption scales in line with the expected load.
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As data centers are low-occupation buildings, only provide light where it is needed.
A mixture of automatic controls with manual override is most effective. E
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Specify the most energy efficient equipment options - such as UPS and Power Distribution Systems.
Operational savings will repay increased initial costs many times over.
AEM Data Center Testing and Commissioning Procedures
AEM’s Test Director will co-ordinate, direct and manage the structured T&C of a Data Center facility in a logical
stepwise manner to attain confidence in its operation as an integrated holistic system and ensure it meets
specified performance and integrity standards to defined industry Tier levels
This process is applicable when upgrading operational facilities as well as for newly commissioned sites
AEM’s extensive T&C experience ensures a reliable outcome is achieved
Contact us for further information - we welcome your enquiry
AEM
Unit B, 3/F, Lucky Building, 3 San Ma Tau Street,
To Kwa Wan, Kowloon, Hong Kong
Tel +852 2333 5138
Fax +852 2333 5183
Email [email protected]
www.aem.hk
Pre-commissioning
Comprehensive bespoke scripts developed to cover
the equipment testing and commissioning steps
Design review
Establishes T&C requirement based on Tier
Classification and client requirements
Testing and Commissioning
Functional testing of individual and integrated
systems – deviations and trending data recorded
Review and analysis
Results analysed – remedial actions identified –
trending performance examined for future loading
