Your SlideShare is downloading. ×
  • Like
Energy Efficiency
Upcoming SlideShare
Loading in...5

Thanks for flagging this SlideShare!

Oops! An error has occurred.


Now you can save presentations on your phone or tablet

Available for both IPhone and Android

Text the download link to your phone

Standard text messaging rates apply


Published in Education
  • Full Name Full Name Comment goes here.
    Are you sure you want to
    Your message goes here
    Be the first to comment
    Be the first to like this
No Downloads


Total Views
On SlideShare
From Embeds
Number of Embeds



Embeds 0

No embeds

Report content

Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

    No notes for slide


  • 1. Energy efficiency
  • 2. The International Energy Agency (IEA) projects global primary energy demand could grow by 55% from 2005 to 2030
    Meanwhile climate change is a growing concern withenormous pressure to reduce CO2 emissions
  • 3. According to Lord Kelvin (1824 - 1907)
    "If you cannot measure it, you cannot improve it."        
    We need to know how much energy we consume, how much we waste and how much we need in order to become more energy efficient
  • 4. Energy audit should identify
    The forms & amounts of energy being used
    The cost of each energy form
    The purposes for which energy is being used
    Energy losses within the system
  • 5. An energy audit involves measurements of:
    Inputs: Energy consumed (as reflected on utility bill)
    Throughputs: Work achieved (operation of machines, lights etc.)
    Outputs: Energy consumed but wasted (leaks, inefficiencies etc.)
  • 6. The Bucket Concept:Energy inputs, throughputs and outputs.
  • 7. Energy efficiency is improved when leaks are plugged, and more efficient lighting and appliances are used
  • 8. The global average efficiencies of electricity production are:
    34% for coal,
    40% for natural gas and
    37% for oil
    For all fossil fuels, the global average efficiency is 36%.
    Wide variations are seen in efficiencies amongst countries, with OECD countries typically having the highest efficiencies.
  • 9. Buildings
    Buildings account for 40% of all energy usage in most countries.
    Therefore, energy efficient buildings are critical in making an impact on CO2 emissions.
  • 10. Lighting
    Artificial light production accounts for 8.9% of total global primary consumption and represents approximately 8% of world CO2 emissions.
    Improving the efficacy of lighting systems can therefore be an important means to lower greenhouse gas emissions (
  • 11. Incandescent bulb vscompact fluorescent light(CFL)
  • 12. CFLs are more expensive than incandescent bulbs
    -CFLs use approximately 5 times less energy than incandescent bulbs
    -CFLs last approximately 10 times longer than incandescent bulbs
    Therefore, CFLs actually save money as well as energy and waste
  • 13. Ideally buildings should:
    Be well insulated
    Get natural light
    Use energy efficient appliances and fittings
    Avoid energy leakages (outputs)
    Be kept at a comfortable (rather than cool) temperature
    Supply some of its own energy needs (e.g. solar panels)
    Use motion detection sensors which switch off appliances when no-one is there
    Use cool roofs (reflect sunlight)
  • 14. Cool roof
  • 15.
  • 16. A Smartgrid
    An intelligent monitoring system that keeps track of all electricity flowing in the system.
    Less power loss
    Capable of integrating alternative sources of electricity such as solar and wind. When power is least expensive a smart grid could turn on selected home appliances such as washing machines or factory processes that can run at arbitrary hours. At peak times it could turn off selected appliances to reduce demand.
  • 17. Smartgrid
  • 18. Government role
    Building codes for new buildings
    Refurbishments and renovations of older buildings should work towards energy efficiency
    Standards for insulation and energy efficiency from windows is needed
  • 19. Electrical appliances
    Residential appliances, alone, account for over 30% of the electricity consumption in most countries.
    Effectively implementing energy efficiency regulations for appliances is essential.
    Standby power represents 2-11% of the residential electricity use in IEA member countries
    Plasma televisions that remain on for longer periods of time could cause the global energy consumption of televisions to double by 2020. Promoting the most efficient technologies available and stimulating the market to make new technologies commercial will be crucial to achieving energy savings in this sector.
  • 20. Appliances should be labelled for energy efficiency
    These labels need to be audited externally to ensure they are accurate
  • 21. Energy management is part of an EHS management system
    Firstly, the existing situation must be assessed
    An Energy Management Matrix is useful to help assess the existing situation
  • 22.
  • 23. Advantages of energy efficiency
    Saving money
    Improved corporate image
    Attract investors
    Improve staff morale / retention
    Minimise pollution - Cleaner air & water
    Minimise greenhouse gases & climate change
    Conservation of natural resources
  • 24.
  • 25. THE END