Power Management and Other Energy-Efficiency Strategies for

Plug-Load Equipment

May 12, 2006

Presented by: Carol Sabo, PA Consulting Group

Tom Bolioli for EPA ENERGY STAR Power Management

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Presentation Topics• What is power management?

• Why implement power management strategies?

• What else can you do to save plug-load electric use?

• How can you implement power management?

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What is power management?

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What is power management?• Monitor power management (MPM) places active monitors into a low power sleep mode after sitting idle for a specified period– Reduces power draw from 30–90 watts to 2–3 watts

• Computer power management (CPM) places the computer itself (CPU, hard drive, etc.) into a low power sleep mode– Reduces power draw from 40–90 watts to 2-3 watts

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What is power management?• Power Management

capability already exists in most computers—it just needs to be activated

• There are a variety of software tools to help you:– assess the current status of

monitor power management– quickly enable both for

computers and monitors on your network

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Why implement power management strategies?

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Why implement power management?• PCs and non-PC office equipment are estimated to be

the fastest growing energy uses for the commercial sector through 2030 according to the Energy Information Administration—Annual Energy Outlook 2006 Report– Energy consumption for PCs is estimated to grow 3

percent annually– Energy consumption for other office equipment is

estimated to grow 4.1 percent annually– In comparison, energy consumption for other end-uses

such as space heating is estimated to grow about 1 percent

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Plug-Load Equipment Usually Accounts for More Than 20 Percent of the Electric Use in Offices and 900 kWh or $100 per Office Employee Annually

Computers & monitorsSmall power suppliesSpeakers PrintersCopiers and MFDsFaxesScanners and multi-function devices (MFDs)

Vending machinesTask lightingLarge coffee machinesWater coolersLarge refrigeratorsOther appliancesSpace heaters

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PCs Account for the Majority of Plug Load Electric Use in an Office of 200 Staff

Base Case Energy Use at NYSERDA Office

3 Water Coolers

1%

3 Vending Machines

5%11 Copiers

13%

28 Printers8%

400 Sm. Power Supplies

3%

111 Task Lights

2%

5 Coffee Machines

4%

202 PCs/Monitors53%

Other Plug Load10%

Refrig.1%

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Typical Estimated Savings for Implementing Various Power Management Strategies for 1,000 PCs

$4

0,7

75

$3

2,2

44

$4

4,7

84

$1

0,5

03

$0

$10,000

$20,000

$30,000

$40,000

$50,000

$60,000

$70,000

EstimatedTotal AnnualCost $70,752

MPM Only MPM +Power Off

After Hours

CPM Only MPM +CPM+ Power Off

An

nu

al

Ele

ctr

ic C

ost

Bill Savings

MonitorUse

Computer

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What else can you do to save plug-load electric

costs?

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Personal Computers and Monitors

• Order laptops instead of desktop computers to cut the computer electric use by 50 percent or more

• Estimated savings for a laptop instead of a desktop with CRT monitor is $25 to $40 per year per PC

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Screen Savers Do Not Save Energy

• Limit the use of 3-dimensional screen savers that can double the power use of some PCs

• Use dark colors—white and bright colors can increase power use of a screen saver by 20 percent or more

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PC Monitor Procurement• Consider purchasing LCD monitors when

replacing monitors– Average annual savings per monitor (based

on 40 watts reduction) is $35 if the monitor is not turned off after hours and drops to $10 savings if the monitor is always turned off after hours

– There are other benefits such as reduced heat from the monitor and less flicker that help justify the incremental cost, which has dropped considerably in the last few years

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Copiers/Document Centers/MFDs• Develop specifications to

purchase/lease the most efficient ENERGY STAR model

• Power off all copiers after hours using “auto off” feature or manual shutdown

• Reduce the wait time before “powering down”

• Estimated annual electric cost savings: $30-$70

                    

                                           

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Printers• Set laser printers to go into “low

power” or “energy saver” mode after 15 minutes of inactivity

• Power off all printers (large and small) when staff leave for the day

• Total annual savings range from $5 to $27 depending on size of printer, staff behavior, and cost per kWh.

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Eliminate Small Printers• Consider consolidating small individual

printers by replacing them with large common area printers

• There may be a small electric saving from eliminating the small printers if that change facilitates equipment power management and shut down, but

• Operating and maintenance costs savings from ink cartridges and IT support can be significant at $100 per printer

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Vending Machines• Replace cold beverage vending machines

with units that meet ENERGY STAR® Tier II Specifications or install vending misers

• Remove vending machine lights or use occupancy sensors

• Assess electric costs versus revenues for vending machines

• Estimated annual electric cost savings for each machine based on replacement: $130 average savings per unit

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Water Coolers• Turn off hot water taps for

hot/cold units• Install timers to turn off heating

and cooling after hours• Purchase ENERGY STAR®

qualifying equipment when replacing old units

• Estimated annual electric cost savings: $35-$70 per unit

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Appliances• Replace very old, inefficient

refrigerators with new efficient units

• Turn off at night or use timers for the large coffee makers that continuously heat water

• Estimated annual electric cost savings: – refrigerator: $35 or more– large coffee maker: $24-35

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Building: Buffalo City Hall

Building Size: 566,313 total square feet

Number of Floors: 26 floors

Number of PC Using Employees: 1,000

Use of Building: City Administration

Total Annual kWh: 3,991,680

Total Annual Electric Bill: $486,836

Average Electric Cost Per kWh: 12 cents

Plug-Load Equip. Use: 960 kWh/employee

NYSERDA $mart Offices Case Study

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Equipment# of

UnitsLow-cost/No-cost Energy

Efficiency Measures

% Saved With

Extreme Office

Makeover

Total Electric

Bill Savings @

$0.12

PC/Monitors 1000 Shut off & Power Mgmt 69% $55,857

Printers 330 Shut off & Power Mgmt 31% $4,138

Copiers/Doc. Centers 75 Shut off & Power Mgmt 67% $6,815

Faxes/Scanners/MFDs 25 Shut off & Power Mgmt 37% $289

Task Lights 38 Replace w/CFLs 72% $117

Water Coolers 43 Turn off Hot Water Taps 48% $1,522

Refrigerators 22 Replace Old Ineffic. Units 54% $1,718

Coffee Machines (Lg) 17 Turn off at night/timers 25% $597

Vending Machines 2 Replace w/ENERGY STAR 62% $354

Total Equipment Users 1000 62% $71,407

Buffalo City Hall Estimated Savings of $71,400 for 1,000 Employees at 12 cents/kWh

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How can you implement power management?

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Activating Power Management Organization Wide

• Monitor Power Management is a no-brainer-– MPM is stable -- problems associated with MPM are

exceptionally rare

– Fortune 500 IT departments require less than a day to implement MPM features

– Earn recognition from EPA ENERGY STAR

• Computer Power Management implementation is becoming more and more commonplace.

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Means To Activate MPM• EPA Tools

– EZ Save - activates MPM and polls network – EZ GPO - control MPM settings using Group Policy

Objects

• Commercially available tools:– Altiris Energy Saver Toolkit– Apple’s Remote Desktop 2– CA’s Unicenter– IE’s NightWatchman– Desktop Standard’s Policy Maker– Verdiem’s Surveyor Network Energy Manager

• Replication of image during rollout to W2000 or XP

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Computer Power Management – What Is It?

• Originally designed to conserve battery life on standalone laptops

• Increasingly deployed to save electricity on desktops

• However, activation in networked environments is not as straightforward as MPM

System standby (S3)– saves 40+ watts– wakes up in 5-10 seconds– does not save work in

event of a power loss

Hard disk spin down– only saves a few watts

Hibernate (S4)– same energy savings as

system standby– wakes up in 20+ seconds– saves work in the event

of a power loss

System standby (S3)– saves 40+ watts– wakes up in 5-10 seconds– does not save work in

event of a power loss

Hard disk spin down– only saves a few watts

Hibernate (S4)– same energy savings as

system standby– wakes up in 20+ seconds– saves work in the event

of a power loss

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CPM Tools and Challenges• Like MPM, numerous tools to activate CPM:

– EPA’s EZ GPO*; Apple’s Remote Desktop 2; IE’s NightWatchman; Desktop Standard’s Policy Maker; Verdiem’s Surveyor Network Energy Manager

– Replication during rollouts

• Unlike MPM, some challenges remain: – If patches are pushed out at night, may need extra step

to awaken computers at night

– Compatibility issues still exist but becoming less and less of a problem

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Waking Up Sleeping Computers at Night for Updates

• Wake on LAN – Bring PCs out of sleep state at any time– Ideally activated before deployment– Post deployment can be difficult but through re-

imaging (Ghost) or registry key push

• Task Scheduler – Bring out of sleep state at specific time– Dameware Utilities– Desktop Standard’s Policy Maker– Verdiem’s Surveyor

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Power Management Conclusions

• If you have not activated Monitor Power Management, you should because it is quick and easy and gives you immediate savings

• Computer Power Management can be implemented in many cases to provide additional immediate savings

• Power Management can implemented to provide additional savings on 80 PLUS Computers

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More Information• Susan Andrews, NYSERDA Project Manager,

(sta@nyserda.org) 1-800-NYSERDA (http://www.nyserda.org/programs/offices/)

• Carol Sabo, Lead Contractor, Project Manager, 703-915-4034 (carol.sabo@paconsulting.com)

• Tom Bolioli, EPA Power Management Tools, 617-923-4132 (tbolioli@terranovum.com)