My Ton – Ecos Consulting Brian Fortenbery – EPRI Solutions Bill Tschudi – Lawrence Berkeley National Laboratory Sponsored by: California Energy Commission (CEC)─Public Interest Energy Research (PIER), California Institute for Energy Efficiency (CIEE). Open House Presentation Summer 2006 Sun Microsystems Newark, CA DC Power for Data Centers – a demonstration

High Performance Buildings for High-Tech Industries 2 Open House: Agenda  Project background  Project objectives  Demonstration configurations  Technical & safety details  Project results Guided Tour of Equipment Questions/Answers/Discussion Welcome & Overview

High Performance Buildings for High-Tech Industries 3 Thomas Edison: “My personal desire would be to prohibit entirely the use of alternating currents. They are as unnecessary as they are dangerous. I can therefore see no justification for the introduction of a system which has no element of permanency and every element of danger to life and property.”

High Performance Buildings for High-Tech Industries 4 Research, develop, and demonstrate, innovative energy efficient technologies 10-year initiative focusing on high- tech industries – e.g. data centers Help move the market to more efficient technologies Research and demonstration projects include technology transfer California Energy Commission Public Interest Energy Research High-tech Buildings Project Objectives

High Performance Buildings for High-Tech Industries 5 DC Demonstration – Timeline Stakeholders first met – Fall 2005 Kick-off meeting – April 2006 Equipment assembly – May 2006 Initial “Team Open House” June 7, 2006 Public Open House events: June 21, July 12, 26; Aug 9, 16 End date – August 16, 2006

High Performance Buildings for High-Tech Industries 6 Industry Partners Made it Happen  Alindeska Electrical Contractors  APC  Baldwin Technologies  Cisco Systems  Cupertino Electric  Dranetz-BMI  Emerson Network Power  Industrial Network Manufacturing (IEM)  Intel  Nextek Power Systems  Pentadyne  Rosendin Electric  SatCon Power Systems  Square D/Schneider Electric  Sun Microsystems  UNIVERSAL Electric Corp. Equipment and Services Contributors:

High Performance Buildings for High-Tech Industries 7 Other Partners Collaborated  380voltsdc.com  CCG Facility Integration  Cingular Wireless  Dupont Fabros  EDG2, Inc.  EYP Mission Critical  Gannett  Hewlett Packard  Morrison Hershfield Corporation  NTT Facilities  RTKL  SBC Global  TDI Power  Verizon Wireless Stakeholders:

High Performance Buildings for High-Tech Industries 8 Data Center Power Use Data center power use nationally is large and growing. Two studies estimated data center energy use: 2004 EPRI/Ecos estimated 14.8 TWh 2000 Arthur D. Little estimated 10.1 TWh 0ne terawatthour = 1,000,000,000 kilowatthours or one million megawatthours Saving a fraction of this energy is substantial

High Performance Buildings for High-Tech Industries 9 9 Typical Data Center Power Use Source: Intel Corp. ~50% Power Efficiency LoadsPower deliveryCooling Cumulative Power

High Performance Buildings for High-Tech Industries 10 Power Consumption: 100 W System Load Source: Intel Corp. Server fans 15W UPS +PDU 20W PSU 50W Load 100W VR 20W Room cooling system 70W Total 275W source: Intel Corporation

High Performance Buildings for High-Tech Industries 11 This demonstration focuses on reducing power delivery and conversion losses observed in our prior work: Uninterruptible Power Supplies (UPS) Power Supplies in IT equipment

High Performance Buildings for High-Tech Industries 12 UPS and Power Supply efficiency We observed a wide range of performance from the worst to the best Our original goal was to move the market to the higher performing systems Incentive programs, labeling, education programs were all options – and still are

High Performance Buildings for High-Tech Industries 13 Data Center Power Delivery System Power Dist % UPS % Power Supply % DC/DC % The heat generated from the losses at each step of power conversion requires additional cooling power HVAC: Power for cooling can equal or exceed the direct losses

High Performance Buildings for High-Tech Industries 14 Then we asked the question: Could some of the conversion steps be eliminated to improve efficiency? Could a demonstration be devised to measure actual savings?

High Performance Buildings for High-Tech Industries 15 DC Demonstration - Objectives 1.DC powered server equipment exists in the same form factor or can readily be built from existing components 2.DC powered server equipment can provide the same level of functionality and computing performance when compared to similarly configured and operating AC server equipment 3.Efficiency gains from the elimination of multiple conversion steps can be measured by comparing traditional AC delivery to a DC architecture 4.DC system reliability is as good or better than AC system reliability The demonstration’s original objectives were to show a rack level solution:

High Performance Buildings for High-Tech Industries 16 The project team rapidly defined additional objectives: 1.Demonstration of 380 V. DC distribution at the facility level compared to conventional AC systems 2.Demonstration of other DC solutions (48 volt systems) 3.Evaluation of safety considerations 4.Demonstrate ability to connect alternative energy solutions (PV, fuel cells, etc.)

High Performance Buildings for High-Tech Industries 17 What the demonstration included Side-by-side comparison of traditional AC system with new DC system – Facility level distribution – Rack level distribution Power measurements at conversion points Servers modified to accept 380 V. DC Artificial loads to more fully simulate data center

High Performance Buildings for High-Tech Industries 18 Additional items included Racks distributing 48 volts to illustrate that other DC solutions are available, however no energy monitoring was provided for this configuration DC lighting was included!

High Performance Buildings for High-Tech Industries 19 Typical AC Distribution Today

High Performance Buildings for High-Tech Industries 20 Facility-Level DC Distribution 380V.DC

High Performance Buildings for High-Tech Industries 21 Rack-Level DC Distribution

High Performance Buildings for High-Tech Industries 22 The layout you will see

High Performance Buildings for High-Tech Industries 23 Details Safety was reviewed by a committee of the partners. No significant issues were identified. Only concern was whether fault currents would be large enough to trip protective devices. All distribution equipment is UL rated for DC applications No commercially available DC connector exists in a size convenient for use with servers Reliability should be improved – fewer potential points of failure. Eliminating heat sources should help. Final report will address safety and applicable codes and standards

High Performance Buildings for High-Tech Industries 24 Measured Results Facility level overall efficiency improvement: 10 to 20% Smaller rack level overall efficiency improvement but other benefits include: –Thermal benefits –Smaller power supply in server – Transition strategy for existing centers

High Performance Buildings for High-Tech Industries 25 AC system loss compared to DC 9% measured improvement 2-5% measured improvement

High Performance Buildings for High-Tech Industries 26 Implications could be even better for a typical data center Redundant UPS and server power supplies operate at reduced efficiency Cooling loads would be reduced. The UPS system used in the AC base case system performed better than benchmarked systems – efficiency gains could be higher. Further optimization of conversion devices/voltages is possible

High Performance Buildings for High-Tech Industries 27 Data Center Power Delivery System XFMR 98% - NA UPS % Power Supply % UPSXFMRPSTotal Efficiency System Efficiency87.00%98.00%90.00%76.73% High Efficiency (DC Option)92.00%100.00%92.00%84.64% Compute Load (W)Input Load (W)Difference System Load10, High Efficiency (DC Option)10, %

High Performance Buildings for High-Tech Industries 28 Data Center Power Delivery System Power Dist 98% - NA UPS % Power Supply % UPSXFMRPSTotal Efficiency Typical System Efficiency85.00%98.00%73.00%60.81% High Efficiency (DC Option)92.00%100.00%82.00%75.44% Optimized DC Option92.00%100.00%92.00%84.64% Compute Load (W)Input Load (W)Difference Typical Load10, High Efficiency (DC Option)10, % Optimized DC Option10, %

High Performance Buildings for High-Tech Industries 29 Results What does 15% increase in efficiency mean to the bottom line? Actual mileage will vary

High Performance Buildings for High-Tech Industries 30 Results What does 15% increase in efficiency mean to the electrical power grid?

High Performance Buildings for High-Tech Industries 31 See the results on-line Actual results Lawrence Berkeley National Laboratory websites for more information – –

High Performance Buildings for High-Tech Industries 32 Additional Information Project Coordination & Contacts: My Ton, Ecos Consulting Brian Fortenbery, EPRI Solutions Lawrence Berkeley National Laboratory Bill Tschudi, Principal Investigator Dr. Evan Mills, Press and publicity contact THANK YOU FOR YOUR INTEREST!