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BOA Electrical

BOA Electrical. Outline. Computers and printers Appliances Demand and consumption ENERGY STAR ratings Car plugs Miscellaneous equipment. Piner Olivet Lifestyle Program. Lifestyle Campaigns students and teachers custodian support Examples Computers off Lights off Waste less.

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BOA Electrical

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  1. BOA Electrical

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

  3. Piner Olivet Lifestyle Program • Lifestyle Campaigns • students and teachers • custodian support • Examples • Computers off • Lights off • Waste less

  4. Piner Olivet Technical Program • Student technical audits • Building Operator Training • Technical audits • Energy monitoring and savings reports • Building retrofits

  5. 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

  6. Piner Olivet district update • Lifestyle Program news • Recent events • Upcoming events • Technical Program news

  7. Piner Olivet in your school • Success stories • Areas to improve

  8. 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

  9. 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

  10. E L E C T R I C A L Cost and energy use vs. computer hours on • 100 watts at 5 cents/kWh

  11. E L E C T R I C A L Personal computers –switching off Computers often left on after class or even during vacation breaks

  12. 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

  13. Computer energy consumption • Average computer: 80 to 110 watts • 15-inch colour monitor: 60 watts • CPU: 40 watts • Larger monitors use more energy

  14. 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

  15. Energy-saving features MacintoshComputers™ • Energy Saver set up in Control Panel • “Sleep mode” = 2 watts • “Standby mode” = 40 watts • Restart with mouse or keyboard

  16. E L E C T R I C A L Energy-saving features The Macintosh Energy Saver set-up

  17. Energy-saving features IBM™ - Type Computers • Power Management Option in Control Panel • Activates after period of inactivity • Monitor off • Standby • Hibernation • Restart with mouse or keyboard

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

  19. E L E C T R I C A L Screensavers Computers on screensaver mode should be turned off

  20. 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

  21. 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

  22. 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

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

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

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

  26. E L E C T R I C A L Freezers Keep 2/3 full; defrost regularly

  27. E L E C T R I C A L Freezers Provide adequate air space

  28. 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

  29. E L E C T R I C A L Refrigerators Condensor clogged with dirt

  30. 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

  31. 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

  32. 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

  33. E L E C T R I C A L School demand profile • Typical school - total building load

  34. E L E C T R I C A L Analog electricity meter

  35. E L E C T R I C A L Thermal demand meter

  36. 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

  37. 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

  38. E L E C T R I C A L ENERGUIDE label

  39. Electric kilns • Use 18 to 45 kW • Could set a peak demand • Use “load scheduling” instead • Operate at night • Use a timer

  40. Equipment with digital readouts • LED displays: 2 to 4 watts • Unplug during vacant periods

  41. E L E C T R I C A L Equipment with digital readouts LED display draws power

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

  43. Refrigerated vending machines • $100 to $150/year to run • Add to heat load • Additional cooling costs up to $10/year

  44. E L E C T R I C A L Vending Miser Vending Miser can reduce energy use

  45. E L E C T R I C A L Refrigerated vending machines Lights and compressor increase energy use

  46. E L E C T R I C A L Block heater operation • % on time to maintain engine block at -7 °C

  47. Car plug controls • Load scheduling to reduce peak demand • Time clocks • Often bypassed • Check time settings • Part of building automation system

  48. Car plug controls • Outdoor temperature control activated at -20 °C • Individual measures • Timer cords • Power Saver cords

  49. E L E C T R I C A L Car plug controls

  50. 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

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