Energy saving technology for data centers. HVDC(High Voltage Direct Current) + 12V Server rack system

Energy saving technology for data centers HVDC（High Voltage Direct Current） ＋ 12V Server rack system Green Solution Business Unit Environmental Technology Division

NTT DATA INTELLILINK Corporation

Copyright © 2013 NTT DATA INTELLILINK Corporation

Case study

Service In ! / Sakura Internet Ishikari DC

■ System: DC12V Type HVDC Power Supply System （Product: FRESH HVDC® and XECHNO® Power）

■ Location: Ishikari DC of Sakura Internet ■ Range: 19Racks 140kW

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Configuration: XECHNO-Power and central power supply unit Central power supply unit

Backside of server rack

Mount frame

Shelf（TJ1727）

Monitoring device for central PS UNIT

power Central Power supply Unit unit Supply

PS Unit （TJ1715）

Parallel running with N+1 redundant 6 Unit Max hot-pluggable PS Unit TJ1715 （HVDC DC/DC Converter)

SNMP

Pass-through box

DC12 DC12V V ITE ITE

Minus cable Plus cable

DC12V Central PS (DC/DC Converter)

Laminated bus bar Flexible bus bar

Server Rack System (20－25 Racks / 1System) Copyright © 2013 NTT DATA INTELLILINK Corporation

Flexible bus bar Connected bus bar 3

What HVDC DC12V type can do for You Benefit１

HVDC DC12V can help you succeed in the future with greater productivity and lower costs.

●Total Efficiency – higher than 90% with reducing the number of conversion! ●High efficiency with real loading factor, unlike UPS ●Intensive PS system with central power supply unit in server rack ●Reduction of electricity charge

Benefit2

●Non-stop maintenance and expansion through n+1 redundancy! ●Seamless connection to battery during power outage! ●Less AC conversion! ●Eliminating PS form ITE, long-lasting, highly-reliable! Fanless, liquid-capacitor less!

Energy-saving effect High reliability Safety The future technology ●Solving high voltage-current problems ! ・Arc suppression circuit ・Middle point ground ・DC12V

Benefit3 Copyright © 2013 NTT DATA INTELLILINK Corporation

●Solar power ●LED Illumination ●Fuel cell ●Cooling system with outside air ●Superconductors etc… Benefit4 4

Energy-saving effect: Energy reduction HVDC DC12V Power Supply System reduces AC/DC conversions between commercial power and ITE. Power loss is reduced by approximately 10-20%.

CPU/MEMORY/HDD

CPU/MEMORY/HDD

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Safety Multiple safety guard ！ AC ～

PDU

PS rack AC DC

DC340V

DC340V

HVDC

HVDC

Server rack DC

Server（DC12V） DC12V

Mother board Memory HDD CPU

Battery Central Redundant Power Supply

Key technology : Middle point ground

Key technology : Bus bar

The current is limited within safety current for human through high resistors of 47KΩ. Dangerousness by the high voltage had been pointed out. But ,,,

Key technology : Arc suppression circuit W/O Suppression Circuit

W/ Suppression Circuit

Resolved the arc discharge issue at the time of switch-on/off and disconnection.

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The difference ＵＰＳ to HVDC-DC12V DC380V SERVER AC

～

UPS

PDU

DC/AC Power supply （PWM Switching）

（PWM Switching）

Switching Power supply （Isolation AC/DC） （PWM Switching）

AC

Switching Power supply （Isolation AC/DC） （PWM Switching）

Battery

AC

～

UPS

PDU

DC/AC Power supply （PWM Switching）

（PWM Switching）

η=80～92%

AC

Battery

AC

Diode Rectifier （Non-Isolation） （Non-Switching）

～

DC12V

Conventional DC200～400V

Non-stable power supply DC340-380V

～ AC

Mother Board

PDU

η=9８～99% PDU

n+1 redundant

Battery

DC12V η=99.5% Switching Power supply （Isolation DC/DC） （PWM Switching）

n+1 redundant

Pass-Through （W/Protection）

DC12V SERVER

Mother Board

η=93～95% Battery Battery

Copyright © 2013 NTT DATA INTELLILINK Corporation

n+1 redundant

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Energy-saving effect: Total efficiency of HVDC comparative chart効率比較 of efficiency

Eff[%] 効率

difference 差異

95.0 %

20.0 % 18.0 %

90.0 %

9.0%

85.0 %

8.4%

18.0%

16.0 % 14.0 % 12.0 %

80.0 %

10.0 % 75.0 % 70.0 %

総合効率

AC方式総合効率

■ AC Type Total Efficiency

XECHNO+Fresh

総合効率

■ Difference(%)

AC方式総合効率

8.0 %

XECHNO+Fresh Total Efficiency

6.0 %

ACXECHNO+Fresh Type Total Efficiency

4.0 %

65.0 %

XECHNO+Fresh

■ XECHNO+Fresh Total Efficiency

差異 ( % )

AC方式総合効率 Difference(%) 差異 ( % )

2.0 %

60.0 %

0.0 % 12.5%

25.0%

37.5%

50.0%

62.5%

75.0%

87.5%

100.0%

Load Factor[%] 負荷率 (%)

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Solar Power + HVDC Drive The Future Communication with Sunlight ! Solar battery generates DC that’s the same as HVDC !

Existing Solar Power Generation Power Conditioner

What percent of Solar power will be fed ?

DC

 Doesn’t need Power Conditioner 

Power Selling

Local Generation for Local Consumption

AC

 Reasonable Investment ...Say goodbye to Power Conditioners.

Power Purchase

Data Center

Power Company

HVDC

Power Loss Reduction : 5 % - 10%

Plus ! Solar

Simple & Direct

DC

DC

Power Company Copyright © 2013 NTT DATA INTELLILINK Corporation

HVDC

Data Center 9

International standardization activity for DC12V DCEM-WG has officially started as a member of Green University of Tokyo Project DCEM-WG（Data Center Energy Management Working Group） ■SWG1・・・・DCIM（Data Center Infrastructure Management） ■SWG2・・・・HVDC system(High Voltage Direct Current System） to be standardized internationally (ITU etc.)

to be standardized internationally (ISO/IEEE etc.)

Step 3

Step 3

ASP・SaaS・Cloud Consortium

Japan Data Center Council(JDCC)

Ministry of Internal Affairs and Communications

Ministry of Economy, Trade and Industry

Step 2 Technical Spec

Green University of Tokyo Project Copyright © 2012NTT DATA Corporation

DCEM-WG

DPPE Datacenter Performance Per Energy

To make the Technical SPEC for Step 1 HVDC/12V PS with DCIM, After one year, via demonstration experiments, we will set the standard for DC12V 10

High Voltage Direct Current – Open Compute Project 3φ AC480V

UPS

AC

DC

AC

AC

DC

DC12V

MOTHER BOARD

ACin

DC12V-SERVER

Battery

SERVER RACK ACin 3φ AC480V/1φ AC277V

AC

DC

Battery

Open Compute project Open Rack Hardware v1.0 V2 Power shelf

AC

HVDC

DC340V /380V

MOTHER BOARD

HVDC

DC

ACin

DC12V server DC12V server DC12V server AC/DC

DC12V-SERVER

21inch RACK

SERVER RACK

Battery

HVDC Open Compute project

DC12V

DC12V Server DC12V server DC12V server AC/DC DC12V server DC12V server DC12V server AC/DC

Open Compute Project

DC12V

MOTHER BOARD

DC12V-SERVER

HVDCin

HVDCin

SERVER RACK HVDCin

DC12V server DC12V server DC12V server DC/DC DC12V server DC12V server DC12V server DC/DC DC12V server DC12V server DC12V server DC/DC

21inch RACK HVDC Open Compute Project Copyright © 2012NTT DATA Corporation

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