Power Management and Other Energy-Efficiency Strategies for Plug-Load Equipment May 12, 2006...
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Transcript of Power Management and Other Energy-Efficiency Strategies for Plug-Load Equipment May 12, 2006...
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
May 12, 2006 Power Management 2
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?
May 12, 2006 Power Management 4
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
May 12, 2006 Power Management 5
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
May 12, 2006 Power Management 7
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
May 12, 2006 Power Management 8
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
May 12, 2006 Power Management 9
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%
May 12, 2006 Power Management 10
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
May 12, 2006 Power Management 12
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
May 12, 2006 Power Management 13
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
May 12, 2006 Power Management 14
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
May 12, 2006 Power Management 15
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
May 12, 2006 Power Management 16
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.
May 12, 2006 Power Management 17
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
May 12, 2006 Power Management 18
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
May 12, 2006 Power Management 19
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
May 12, 2006 Power Management 20
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
May 12, 2006 Power Management 21
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
May 12, 2006 Power Management 22
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
May 12, 2006 Power Management 24
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.
May 12, 2006 Power Management 25
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
May 12, 2006 Power Management 26
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
May 12, 2006 Power Management 27
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
May 12, 2006 Power Management 28
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
May 12, 2006 Power Management 29
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
May 12, 2006 Power Management 30
More Information• Susan Andrews, NYSERDA Project Manager,
([email protected]) 1-800-NYSERDA (http://www.nyserda.org/programs/offices/)
• Carol Sabo, Lead Contractor, Project Manager, 703-915-4034 ([email protected])
• Tom Bolioli, EPA Power Management Tools, 617-923-4132 ([email protected])