Energy efficiency – Petrus Naude – OneWorld
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Transcript of Energy efficiency – Petrus Naude – OneWorld
March 2013
CHOICES SA - Energy Access for Improved
Rural Livelihoods
ENERGY TRAINING WORKSHOP
ENERGY EFFICIENCY
What is Energy Efficiency?
• Energy efficiency is "using less energy to
provide the same service“
- http://eetd.lbl.gov/ee/ee-1.html
• 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://www.iea.org/glossary/glossary_E.asp
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
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
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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
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
nb-wonderbag.com
An opportunity to invest
FEB 2012
INVESTMENT
OPTIONS
R200 to R250
Background What 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.
Improved cook stoves - Efficient and clean burning
cooking
Traditional Cooking
Traditional energy source and use – Not efficient
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
Environmental friendly briquettes & cook
stoves – from biomass sources
More Clean energy efficient burning using briquettes
Making briquettes using biomass waste from area – in community
Invest to Save Options
1. Install a solar water heater
2. In stall ceiling
3. Insulate the ceiling/ roof
Example An efficient fuel for cooking
Liquid Petroleum Gas – switch from electricity or
paraffin
Step 3 – Switch to More Energy
Efficient Fuels
Gas for Cooking Option