it data center guideline.pptx
TRANSCRIPT
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IT Data Center QA & Specification
Guideline
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Objective:
To prepare a complete & structured guideline for IT datacenterwhich will also provide standard working reference on planning ,implementation & operation stage.
IT DATA CENTER QA & SPECIFICATION
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Power
AC powerSubstation, Generator, BBT, MDB, COS, Modular
distribution, light & Socket
DC power Rectifier/Inverter, UPS, Battery
Grounding & Surge protection
Cooling
AFFS Server room, Substation & Generator roomLabeling Equipment & Cable Labeling standard
CablingSignal & Optical cable management system
Power & Grounding cable management system
Drawing & Document
Asset Tracking
House KeepingITDC site preparation Server room preparation, Raise floor, ROXTEC, EQ frame
Cabinet Installation
Checklist QAT, Expansion/ Integration, Preventive Maintenance
Area of Influence under the Guideline
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Highlights of Cooling Guideline
Guidelines Considers
New Data Center
Existing Data center Improving Cooling Efficiency
Solution for High dense Server
Reference:
TIA: Telecommunications Industry Association
ETSI: European Telecommunications Standards Institute
ASME: American society of mechanical engineers
Mobile Operator: DTAC, Thailand
Products:
Emerson Network Power American Power Conversion (Schneider Electric) SUN Microsystems (Oracle Corporation)
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Fig: Concentrate high-density racksFig: Spread out the high-density racks Fig: Concentrate high-dense rowFig: Spread out the high-dense row
Fig: The air inlet and outlet characteristics of cabinet
Spread out the high dense server
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If Aircon unit placement at Cold aisle:
Hot air from the hot aisles crosses over the racksinto the cold aisle when returning to the ACs,causing a mixing of hot and cold air that increases
the temperature of supply air to the rack fronts.
Recirculated aira mixing of hot and cold airwillincrease at AC end.
Align AC units with the air return path (hotaisles).
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Misplacement of perforated tiles impacts:Recirculated air Bypass air flow Negative pressure flow
Floor vents placed too close to AC units
produce negative pressure due to under floor
high air velocity, causing air from the room to
be drawn back under the floor
AC
AC
AC
Recommendation:Perforated Tiles placementAlways at cold aisle Never at vacant place Minimum distance ( 1.5 meter) from air con
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Unused vertical space in rack enclosurescauses the hot exhaust from equipment to takeashortcutback to the equipments intake.
Also avoid the unorganized cablemanagement of the cabinet which may hamperthe cooled air flow.
Fig: Usages of filler
Fig: Organized cable will not hampered air flow
Recommendation:
unused vertical space in rack must beenclosed through filler.
Organized cable of the cabinet as perguideline and product manual
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To measure the ambient temperature and humidity of the data center, may followthese guidelines:
Place sensors in cold aisles, where cold air outlets provide conditioned air tothe systems.
Hot-aisle measurements will be typically out the systems recommendedoperating ranges and therefore are not a valid indication of the requiredtemperature and humidity levels.
Place sensors 10 to 15 feet (3 to 4.5 m) apart from AC or in front ofeveryfourth rack in the aisle.
Place sensors in the middle of the aisle, between the rows of racks.
Place sensors 4.9 feet (1.5 m) above the tiled floor.
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Containment of cold aisle:Using flexible clear plastic barriers to seal the
space of tops of the rack, can greatly improve hot
aisle/cold aisle isolation.
To eliminate short-circuiting (the mixing of hot
and cold air) and hot spot.
These changes should reduce fan energy
requirements and could result in an energy savings
on the cooling unit side (15% ~20% ).
Energy Saving 15% ~20%Reference: -
Emerson Network Power
Pacific Gas And Electric Company
Energy Saving Methodology
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Hot spot is created due to:
Concentration of high heat dissipating nodes in a
same location
Huge amount of unorganized under raise floor
cables, which prevents proper aeration. Inadequate cooling system.
Solution: Containment solutionAir Distribution Unit.
In-Row Air-Handler Unit
Cooling loads within racks can be improved by the
retrofitting of fan-assisted devices that improve airflow and
can increase cooling capacity per rack.
Option 1: Air Distribution Unit Option 2: In Row Air Handler Unit
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Options:High-Density Pods in a Low-Density Data Center
Autonomous Cabinet System
Autonomous Cabinet System : The ACS is a
complete data center in a box, incorporating
cooling, power, fire and security systems
required for very high-density loads. The cooling
unit is situated within the enclosure, thus
ensuring the maximum effectiveness of cool air
delivery to the rack-based equipment.
Fig: High-Density Pods in a Low-Density Data Center
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Redundancy is supportive in cooling systems to permit maintenance of live systems and to ensure the survival of
the data center mission if an air conditioning device fails:
For higher density server, which is also highly business sensitivity, the redundancy approach is sustainable.
Row-oriented architecture provides redundancy at the row level.
This requires an additional or N+1 AC unit for that particular high dense & cooling sensitive row ( 12 kW
Server).
Recommendation:
Our recommendation at least one redundantcooling unit at row level where,
Business severity so high High restart time due to failure of cooling
High power consumption (> 12 kW) Row area @ 80% occupied
4 TonAC
4 TonAC
Hot
5 kW
Cold
3 kW
Hot
3 kW 4 kW
4 kW 3 kW
3 kW 5 kW
4 kW 4 kW
4 TonAC
4 TonAC
4 TonAC
4 TonAC
Hot
5 kW
Cold
3 kW
Hot
3 kW 4 kW
4 kW 3 kW
3 kW 5 kW
4 kW 4 kW
4 TonAC
4 TonAC
4 TonAC
4 TonAC
Hot
5 kW
Cold
3 kW
Hot
3 kW 4 kW
4 kW 12 kW
3 kW 5 kW
4 kW 4 kW
4 TonAC
4 TonAC
Fig: Example
4 TonAC
4 TonAC
Hot
5 kW
Cold
3 kW
Hot
3 kW 4 kW
4 kW 12 kW
3 kW 5 kW
4 kW 4 kW
4 TonAC
R. AC4 TonAC
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Some important checking and then also measurement
data analysis:Air conditioning unit: Measured supply and return temperatures
(Preferable difference > 8 C )
Room temperatures measurement
Rack temperatures and airflow measurement
Aisle & floor tile arrangement
Condition of subfloors
Fig: Room Temperature checking pointsFig: Rack temperature checking
Fig: Supply & Return Temperature of Aircon
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