BOA Electrical

E L E C T R I C A LE L E C T R I C A L

Outline Computers and printers Appliances Demand and consumption ENERGY STAR ratings Car plugs Miscellaneous equipment

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Piner Olivet Lifestyle Program Lifestyle Campaigns

students and teachers custodian support

Examples Computers off Lights off Waste less

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Piner Olivet Technical Program Student technical audits Building Operator Training Technical audits Energy monitoring and savings

reports Building retrofits

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Importance of custodian Focus of Piner Olivet program in

schools Interface between district, teachers

and students Source of technical information Provides continuity Knows schools better than anyone Can produce large savings Key to Piner Olivet program success

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Piner Olivet district update Lifestyle Program news

Recent events Upcoming events

Technical Program news

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Piner Olivet in your school

Success stories Areas to improve

E L E C T R I C A LE L E C T R I C A L

Benefits of electrical equipment efficiency Reduces energy use and cost Improved quality and comfort Less maintenance required Extended equipment life Less waste heat Positive impact on climate change

issues

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Personal computers – switching off Switching off results in significant

energy savings Common misconception: computers

must run 24 hours/day 30% to 40% are left on overnight and

weekends

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Cost and energy use vs. computer hours on 100 watts at 5 cents/kWh

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Personal computers – switching off

Computers often left on after class or even during vacation breaks

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Personal computers – switching off Monitors can be switched on/off 5

times per day Monitors off if unused for 15 minutes Major companies not unduly

concerned Switched-off computers last longer

E L E C T R I C A LE L E C T R I C A L

Computer energy consumption

Average computer: 80 to 110 watts 15-inch colour monitor: 60 watts CPU: 40 watts

Larger monitors use more energy

E L E C T R I C A LE L E C T R I C A L

Energy-saving features Shut-off CPU and monitor after hours Often used only 2 to 4 hours per day Use existing energy saving features

Energy Star - US Government energy efficiency program

New equipment should meet guidelines

E L E C T R I C A LE L E C T R I C A L

Energy-saving featuresMacintosh Computers™ Energy Saver set up in Control Panel

“Sleep mode” = 2 watts “Standby mode” = 40 watts

Restart with mouse or keyboard

E L E C T R I C A LE L E C T R I C A L

Energy-saving features

The Macintosh Energy Saver set-up

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Energy-saving featuresIBM™ - Type Computers Power Management Option in Control

Panel Activates after period of inactivity

Monitor off Standby Hibernation

Restart with mouse or keyboard

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Screensavers

Screensavers: save 10 watts Monitor off manually: save 60 watts Better to turn off monitor

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Screensavers

Computers on screensaver mode should be turned off

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E L E C T R I C A LE L E C T R I C A L

Other benefits to shutting off Less heat generated

Detrimental to electronic components Maximum operating temperature 32°C

Monitors that are shut off don’t emit radiation

File server caution: mark to prevent shut off

E L E C T R I C A LE L E C T R I C A L

Printers Inkjet printers

15 to 20 watts when printing 7 to 9 watts on standby

Laser printers 250 to 800 watts when printing 10 to 20 watts on standby

E L E C T R I C A LE L E C T R I C A L

Printers Off overnight and weekends Local printer: off during day Printer serving remote computers: on

during the day Automatic time clock

Use existing energy-saving features Appropriate size

E L E C T R I C A LE L E C T R I C A L

Photocopiers Off during vacant periods Use energy saving modes Time clock for automatic shut-off Appropriate size

E L E C T R I C A LE L E C T R I C A L

Freezers Keep at -18°C Away from heat sources Defrost when ice is 5 mm thick Air space around freezer

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Freezers Keep at least 2/3 full Clean exposed condenser coils Open door only as long as necessary Unplug in summer Ventilate enclosed space

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Freezers

Keep 2/3 full; defrost regularly

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Freezers

Provide adequate air space

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Refrigerators Locate away from heat Clean condenser coils Leave space between wall and coils Use power saving control Empty and unplug in summer Refrigerate items only when necessary

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Refrigerators

Condensor clogged with dirt

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E L E C T R I C A LE L E C T R I C A L

Refrigerant issues Ozone depletion issues R-12 refrigerant being phased-out New refrigerant is R-134A Consider type of refrigerant when

acquiring new or used appliances

E L E C T R I C A LE L E C T R I C A L

What are a kW and a kWh? Utilities charge for both demand and

consumption Demand (kW or kVA)

Amount of electricity required at a single point in time

Total electricity load Utilities usually charge for the highest

kW peak that occurs each month

E L E C T R I C A LE L E C T R I C A L

What are a kW and a kWh? Consumption (kWh)

Amount of electricity used over time kWh = kW x hours

School electrical meter records demand and consumption each month

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School demand profile Typical school - total building load

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Amps

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Analog electricity meter

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Thermal demand meter performance

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Thermal demand meter

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E L E C T R I C A LE L E C T R I C A L

Savings by unplugging refrigerator Typical older refrigerator, 120

kWh/month Electricity averages $0.05 per kWh 120 kWh/month x $0.05/kWh =

$6.00/month Unplug in July and August $6.00/month x 2 months = $12.00

total

E L E C T R I C A LE L E C T R I C A L

ENERGY STAR Ratings Testing and labelling program Indicates typical kWh/year energy

usage Major appliances must have

ENERGUIDE label Easy to compare efficiency Seek highest equipment efficiency

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ENERGUIDE label

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Electric kilns Use 18 to 45 kW Could set a peak demand Use “load scheduling” instead

Operate at night Use a timer

E L E C T R I C A LE L E C T R I C A L

Equipment with digital readouts

LED displays: 2 to 4 watts Unplug during vacant periods

E L E C T R I C A LE L E C T R I C A L

Equipment with digital readouts

LED display draws power

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Vending machines Unplug during vacant periods Use time clocks Remove unnecessary lights Negotiate energy savings initiatives Use Vending Miser

E L E C T R I C A LE L E C T R I C A L

Refrigerated vending machines

$100 to $150/year to run Add to heat load Additional cooling costs up to $10/year

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Vending Miser

Vending Miser can reduce energy use

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E L E C T R I C A LE L E C T R I C A L

Refrigerated vending machines

Lights and compressor increase energy use

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Outside temperature (°C)

Percent time on

Block heater operation % on time to maintain engine block at -7 °C

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Car plug controls Load scheduling to reduce peak

demand Time clocks

Often bypassed Check time settings

Part of building automation system

E L E C T R I C A LE L E C T R I C A L

Car plug controls Outdoor temperature control activated

at -20 °C Individual measures

Timer cords Power Saver cords

E L E C T R I C A LE L E C T R I C A L

Car plug controls

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E L E C T R I C A LE L E C T R I C A L

Portable electric heaters Electricity costs 5 times more than

natural gas Typically 1,500 watts Could add to peak demand Adjust heating and ventilation system Avoid using electric heaters

E L E C T R I C A LE L E C T R I C A L

Fixed electric heaters Use lowest setting for adequate

comfort Check dials regularly Breaker off in spring, summer, and fall Shut off during vacant periods

E L E C T R I C A LE L E C T R I C A LE L E C T R I C A LE L E C T R I C A L

Time clock

E L E C T R I C A LE L E C T R I C A L

Drinking water coolers 400 to 1,000 kWh per year $20 to $50 per year Shut off during vacant periods Install time clocks Adjust thermostat setting

E L E C T R I C A LE L E C T R I C A L

Custodian is key to program success Focus of conservation initiatives Interface Technical information Continuity Facility knowledge Impact on savings Key to success

BOA Electrical