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Energy efficiency – Petrus Naude – OneWorld
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Energy efficiency – Petrus Naude – OneWorld


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Presentation by Petrus Naude of OneWorld at the CHOICES project community energy workshops in Somerset East, Pearston and Cookhouse communities, Blue Crane Route Municipality in South Africa’s Eastern …

Presentation by Petrus Naude of OneWorld at the CHOICES project community energy workshops in Somerset East, Pearston and Cookhouse communities, Blue Crane Route Municipality in South Africa’s Eastern Cape, held in February and March 2013.

The presentation covers issues of energy efficiency as they relate to South Africa’s communities.

More information about OneWorld:

Further details of the CHOICES project:

Published in: Government & Nonprofit

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  • 1. March 2013 CHOICES SA - Energy Access for Improved Rural Livelihoods ENERGY TRAINING WORKSHOP ENERGY EFFICIENCY
  • 2. What is Energy Efficiency? • Energy efficiency is "using less energy to provide the same service“ - • Something is more energy efficient if it delivers more services for the same energy input, or the same services for less energy input – IEA: tp://
  • 3. What is Energy Efficiency – Steps? Step 2 - Efficient appliances Step 3 -Switching to more efficient fuel e.g. electricity to gas Step 1 - Change behavior
  • 4. WHICH ELECTRICITY USE IS MOST EXPENSIVE? Typical Household Electricity Cost (2012 BCRM Tariff (Prepaid) - MONTH Appliance Watts Hours used Days used kWh /Units Rand per month % of Total Use 1xEnergy saver light 11 5 30 1.7 R1.29 1.2% 1XTV (B&W) 35 6 30 7 R5.32 5.1% 1xIron 1000 4 6 24 R18.24 17.6% 1xKettle 1000 0.5 30 15 R11.4 11.0% 1xHotplate 1000 1 25 25 R19 18.3% 1xRegular light 100 5 30 15 R11.4 11.0% 1xSmall refrigerator 250 6.5 30 49 R37.24 35.8% Total without FBE 136.7 R103.89 Total with FBE 86.7 R65.89 1 2
  • 5. Step 1 - No Cost Options for saving energy • Turn geyser temperature down to 60o Celsius • Use less hot water – water heater biggest user • Switch off equipment when not in use • Reduce excessive heating or cooling in house • Only include the amount of water needed when heating water in a Kettle • Physically turn off appliance switches or at the wall (e.g. a TV or Hi-Fi), instead of leaving them on stand-by • Make one-pot meals and keep lids on pots and /or bring foods to the boil quickly on the “high” setting, then turn the heat down to “simmer” to finish cooking • Thick frost on chilling panels reduces a fridge and freezer’s cooling ability
  • 6. Step 2 – Install Low Cost Options 1. Install efficient lighting - CFL (R30 to R40) Save 70% of lighting cost and 10 times longer 2. Install an efficient shower head (R150 – R250) Save 30 to 40% of water heating cost Save water 3. Insulate the geyser (R200 – R300) Save 20 to 25% water heating cost
  • 7. An opportunity to invest FEB 2012 INVESTMENT OPTIONS R200 to R250
  • 8. BackgroundWhat is it: • The Wonderbag is a non-electric, heat-retention cooker that allows food that has been brought to a boil on a stove or fire, to continue cooking for hours after it has been removed from the direct fuel source. How does it work: • The Wonderbag’s heat retention properties the retains the heat to allow the food to continue cooking without the use of additional cooking fuel. • Each Wonderbag comes with a recipe book containing instructions. • Bring your food to the boil, place in the bag, leave for the recommended time open to serve.
  • 9. Improved cook stoves - Efficient and clean burning cooking
  • 10. Traditional Cooking Traditional energy source and use – Not efficient
  • 11. Improved cook stoves - Efficient and clean burning cooking Key features compared to an open fire: uses at least 50% less wood/charcoal, cooks 2-4 times quicker, produces 70% less smoke 50% less greenhouse gases Example – “EcoZoomStove” Marketed by Restio Energy SA Low Cost Efficient Stoves cost: R150 to R300
  • 12. Environmental friendly briquettes & cook stoves – from biomass sources More Clean energy efficient burning using briquettes Making briquettes using biomass waste from area – in community
  • 13. Invest to Save Options 1. Install a solar water heater 2. In stall ceiling 3. Insulate the ceiling/ roof
  • 14. Example An efficient fuel for cooking Liquid Petroleum Gas – switch from electricity or paraffin Step 3 – Switch to More Energy Efficient Fuels
  • 15. Gas for Cooking Option