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Highly efficient Data center support by the review of theHighly efficient Data center support by the review of theHighly efficient Data center support by the review of the Highly efficient Data center support by the review of the improvement in airimprovement in air--flow control and the feeding methodflow control and the feeding method

-- A case of a data center in Singapore A case of a data center in Singapore --

February 21, 2011February 21, 2011y ,y ,

NTT DATA INTELLILINK CORPORATIONNTT DATA INTELLILINK CORPORATIONTAKASAGO THERMAL ENGINEERING Co. Ltd

Table of Contents

1 Background and Objective

Table of Contents

1．Background and Objective2．Introduction of the Survey/Surveyed

CCompanies3．Survey Process4．Results

・Current Status and issuesCurrent Status and issues on Energy Efficiency

・Energy saving plan and its effect・Energy-saving plan and its effect5．Suggestions

All Rights Reserved, Copyright © GIPC 2011

BackgroundBackground

APEC Yokohama JAPAN （Nov. 2010）Illustrative List of Possible APEC Actions to Support the APEC Leaders’Growth Strategy

P t ti ti iti th h th i t d ti f・Promote energy conservation activities through the introduction of more energy efficient ICT devices and systems, including data centers and ICT utilization in many sectors and new ICT services such as cloud computing (Green ICT).

Recently, the situation at the data center has changed greatly.•Support for environmental protection• Initiatives on Green ICT•Correspondence to ICT technology with fast advancement•Correspondence to ICT technology with fast advancement.

To achieve the Green data center.•High Voltage Direct Current ( HVDC )g g ( )•Air-conditioning efficiency improvement•Server consolidation by virtualization.


ObjectiveObjective

Energy issues in ASEAN countries are critical factors to disturb our economic growth. That is why interest of energy-saving is getting increase.

Under such situation, “Green IT” expects to be one of the solutions to save energy consumption.

This survey aims to introduce Japanese energy saving technologies and to t ib t ti i th i ASEAN t i b d thcontribute supporting economic growth in ASEAN countries, based on the survey

results in data center of Singapore.


Introduction of Survey Company

NTT DATA INTELLILINK CORPORATIONGreen Consulting Business Unit

Introduction of Survey Company

Green Consulting Business Unit

Provides a wide consulting to supporting an environmental response of the companies from both sides of the data center facility and ICT. p yPast, with a track record of 680,000 m2 data center research and analysis.NTT Data Corporation 100% investment.

＊NTT Data Corporation is a system integration and IT consulting company of NTT Group＊NTT Data Corporation is a system integration and IT consulting company of NTT Group. NTT data which has now become the largest of the IT Services companies headquartered in Japan.

Takasago Thermal Engineering Co LtdTakasago Thermal Engineering Co., Ltd.Founded in 1923, Takasago Thermal Engineering Co., Ltd. is Japan's largest company specializing in Heating, Ventilation and Air Conditioning (HVAC). ( )

largest company specializing in Heating, Ventilation and Air Conditioning (HVAC).


Survey Process （Summary）Survey Process （Summary）Schedule : From October 2010 to December 2010.

Surveyed Company : A certain company server room (8000 sqf)Surveyed Company : A certain company server room (8000 sqf)

Survey Item : [PUE Survey], [DPPE Survey] ,[Thermal Environment Survey] and [CFD Analysis]

Proposal

Nov 2010 ～ Dec 2010

AnalysisField Survey

スケジュール Oct 2010Date Nov. 2010 ～ Dec. 2010Oct. 2010

• Calculation of PUE ,(DPPE)d ff l l f

•Monitoring of power consumption – Review and effect calculation of

feeding method. consumption

S f th th lAction

•Analysis of air flow.– Aisle capping effect simulation by

CFD analysis

•Survey of the thermal environment

Action


CFD analysis.

Energy-saving Plan and Its Effect (Summary）Energy saving Plan and Its Effect (Summary）

In order to improve PUE value, it is recommend that the followings shall be implemented.Issues CountermeasuresIssues Countermeasures

1. Installation of Cold Aisle Capping upper/side areas of server racks.

1. Hot air recirculation was happened from hot aisle area to cold aisle area i k

2. AHU to change the control method from the return air temperature to

in server racks.

2. AHU supply air temperature of increase from the return air temperature to

supply air temperature

3. Chilled water temperature changes

increase

3. Further improvement of the chiller machine COP

4. Review of UPS room air-conditioning machine running number and inverter i t d ti

ac e CO

4. UPS room, cooling load is low

introduction

5. Review of the power supply 5. Power supply system conversion


p pp ysystem

pp y ylosses

Current Status and issues of Energy Efficiency (Summary)(Summary)

Item Current Status and issues of Energy Efficiency

1. Air-conditioning of server room

1. Hot air recirculation was happened from hot aisle area to cold aisle area in server racks.

2. Air-conditioning of server room

2. Cooling air from the cold aisle has been returned into the AHU.

3. Power supply system 3. Conversion losses.


Ai diti i fAir-conditioning of server room(Thermal Environment Survey)

1. Hot air recirculation was happened from hot aisle area to cold aisle area in ser er racksarea in server racks.

2 Cooling air from the cold aisle has been returned into the AHU2. Cooling air from the cold aisle has been returned into the AHU.


Current Status and issues of Energy Efficiency （Details）①（Details）①

Thermal environment measurementRack surface suction temperature measurement. In addition Measure while moving air flow, and temperature of cold aisle, and hot aisle.

cold aisle hot aisle cold aisle

Server racks

Temporary sheet

Thermo camera



Situation of cold aisle



hot aisle

Hot aisle has leaked cold air from the cold aisleHot aisle has leaked cold air from the cold aisle,

no blank panel set up the rack space.

Cold air leaked out returns to AHU intact.



Hot air is returned. Cold air is inhaled.

•These symptoms are not phenomena peculiar to the surveyed server room.

These solutions offering Cold Aisle Capping.


Energy-saving Plan and Its Effect (Details） ①Energy saving Plan and Its Effect (Details） ①

Aisle Capping：•build roofs and doors of server lacks as onebuild roofs and doors of server lacks as one.•physically isolate chilled air and exhaust air from IT equipment.•high airtightness made it possible to control optimal air volume of

conditioner that is necessary for servers.

Aisle Capping. made by NTT FACILITIES.An example of temperature / air flow simulation

With aisle capping technique Without aisle capping technique



Before the Cold Aisle Capping

Result of temporary Cold Aisle Cappingpp g

After the Cold Aisle Capping

In the effect of the capping, the cold air has been imprisoned.

After the Cold Aisle Capping

Air flow improvement



Effect of cold aisle simple Cold Aisle CappingNo capping Use Temporar cappingNo capping Use Temporary capping

Temporary Capping aria. Temporary Capping aria.

Capping is trapped cold air, improved temperature distribution in the Cold aisle. All Rights Reserved, Copyright © GIPC 2011


Simulation of supply air control.Case all racks installed Cold Aisle Capping


P l tPower supply system(From the results of PUE Survey)

1. Conversion losses.


Current Status and issues of Energy Efficiency （Details）②（Details）②

Definition of PUE

PUE ＝Value A : Total facility power in DC

Value B : ICT equipment power in DC

a+b+c+d＝ a

d

Conversion lossConversion loss

UPSB S/ SS U

Machine Room

ab

UPSB UPS/UPSSB PDU

LightingLighting ICTLightingLightingC

A/C powerA/C power••Heat of ChillerHeat of Chiller

••Power of AHUPower of AHU

••Power of FCUPower of FCU

c A/C powerA/C power••Heat of ChillerHeat of Chiller


••Power of PUMPPower of PUMP

b



Current Status and issues of Energy Efficiency （Details） ②（Details） ②

d

Conversion lossConversion loss

UPSB S/ SS PDU

MachineRoom

PUE ＝a+b+c+d

≒ 2 2


ab

c

UPSB UPS/UPSSB PDU

LightingLightingICT


LightingLightingC

b

PUE ＝ a ≒ 2.2

a ( ICT power consumption ) = 1.00b ( A/C power consumption ) = 0.97 Heat of ChillerHeat of Chiller


••Power of FCUPower of FCU


Heat of ChillerHeat of Chiller



( p p )c ( Lighting power consumption) = 0.04d ( Power Losses ) = 0.23

PUE = 2.2 （ Value of general data center. ）

The ratio of the electric power loss is 23% against the power consumption of the ICT equipment The ratio of the electric power loss is 23% against the power consumption of the ICT equipment.•Situation

1. The I/O conversion efficiency of the UPS equipment is 56% on the average.2. ICT load of server room is the UPS total capacity of about 5%. UPS equipment is

very inefficient load pointsvery inefficient load points.3. These are general phenomena of the UPS device.


I propose the method of decreasing the Conversion loss furtherI propose the method of decreasing the Conversion loss further.

HVDC(Hi h V lt Di t C t )(High Voltage Direct Current )


Energy-saving Plan and Its Effect (Details） ②Energy saving Plan and Its Effect (Details） ②

HVDC is the abbreviation of “ High Voltage Direct Current ” .Apply the HVDC

A

Data Center power equipment for an effective solution.High voltage power supply will improve capital efficiency to approximately 90 percent. This reduces power loss to the extreme.

ACDCAC

S/B

ＣＶＣＦ（無停電電源装置） ICT Device

DCAC CPU

AC pow

er sup

ＵＰＳＩＣＴ

AC DC12V

pply system

Power

ACin

DC

p ＩＣＴＨＶＤＣ

HVDC PS Rack ICT Device

Power Savings ２０~３５％

AC

DC

CPU

power supply

system DCAC DC

ＩＣＴＨＶＤＣ

DC340V DC12V

ACin


Conversion of two minutes is eliminated. Become a significant energy saving. Further improve the reliability.

y


Energy saving effect (conversion efficiency comparison)

AC/DC

Server RackPDU （AC）UPS system (current)75~85%98% 80~85% 98.5%

ACACServer

UPSTransformer S/B ACAC～

42～30 ％ Loss

PDU （DC）HVDC Server Rack

DCｄｃ

DC/DCCentralized power.

PDU （DC）

保証回路

母線安定

HVDC

98%95%

98%

P S Rack DC340VAC

w/oDC12V

～ Transformer

w/o power supply Server9 ％ Loss



" "We achieved "Safety" by our new technology , HVDC！

① ARC Deterrence Technology ②The Neutral Earth MethodElectric shock, and earth fault protection

・By setting the arc control circuit, suppress the generation of the arc. ・An electric shock, an earth fault with high voltage are

limited on a secure current value by the high resistivity of

The generation of the arc has been an issue Danger by a high voltage has been

limited on a secure current value by the high resistivity of 47kΩ.


The generation of the arc has been an issue as interrupting Direct Current.

Danger by a high voltage has been pointed out.

Energy-saving Plan and Its EffectEnergy saving Plan and Its Effect

Item MethodEffect of reduction (year)

Power

(kwh/year)＊convert into CO2

(kg‐CO2/year)

**Amount of reduction

(SGD/year)

Renewal /Change of

PowerChange in power supply method

by HVDC. 768,864 385,662 115,330

equipment

A/CProduce an increase in temperature

by Cold Aisle Capping. 270,000 135,432 40,500

Other measures to conserve energy. 258,420 129,623 38,763

Total 1,297,284 650,718 194,593

＊ 0 5016 kg CO2/kWh(Environment Building 40 Scotts Road #13 00 Singapore 228231 www nea gov sg)


＊ 0.5016 kg CO2/kWh(Environment Building 40 Scotts Road #13-00 Singapore 228231 www.nea.gov.sg)

** 0.15 SGD/kwh

SuggestionsSuggestions

• For data center highly efficiency and maintenance• For data center highly efficiency and maintenance.

• Continued management of PUE

• Commissioning

• Readjustment

– The management matched to the equipment scale and the load situation is important.

• Air‐conditioning control

• Air‐conditioning machine (number of operating, highly effective model, air volume control, ・・・)model, air volume control, )

• Minimize the loss of the air conditioner → Aisle Capping

l i• Electric power

• HVDC（High Voltage Direct Current）• Renewable energy


Suggestions The photovoltaic generation Installation. Suggestions

photovoltaic panel

General method of Japan HVDCphotovoltaic

Power controller

panel

AC ACServer, Router, etc. DC/DCDC/AC

panel

Server, Router, etc.

AC/DC

RectificationAC AC

Con

verte

r 12V340V

AC/DC

12V340V

UPS

Con

verte

r

（AC）

AC/DC DC/AC

UnnecessaryUnnecessary

Unnecessary

（AC）Battery （DC）

The output of the photovoltaic panel is a high voltage,So the HVDC data center is a good combination !

No power controller

HVDC can be used without converting the power of the photovoltaic generation.

Battery

AC DC400V

DC200～400V97%

PriorityHVDC Supply

・No power controllerHighly effective, high reliability, and low price !

・As running out of the photovoltaic generation power, the electric power is automatically supplied from the AC system side.

・HVDC does not flow back to the AC system in waveform troubled!MTTP with control operation

DC/DC Converter

All Rights Reserved, Copyright © GIPC 2011Copyright © 2010 NTT DATA INTELLILINK CORP.

ACincoming

DC400V

Non-priority

DC340VPriority

Contact List

It would be greatly appreciated if it could contribute to the reduction of the use energy in the

Contact List

data centers of your own country about the result of the survey and measures that

were going to be introduced in this announcement.

If h i t t i l f l f t t t t th f ll i ddIf you have interests in our survey, please feel free to contact to the following addresses.

Thank you.Thank you.

Green Consulting Business UnitGreen Consulting Business UnitGreen Consulting Business Division

NTT DATA INTELLILINK CORPORATION


[email protected]

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