Using repaks carbon calculatorPresentation Transcript
ENERGY: USING THE REPAK CARBON CALCULATOR Ellen Murphy Green Schools Development Officer, An Taisce
WHERE DO WE GET OUR ENERGY FROM?
Fossil fuels are the source of much of our energy, and are formed under intense pressure and heat over millions of years from the buried remains of plants and animals.
By burning these fossil fuels to release heat from the chemical energy they contain, steam can be raised in a power station boiler to drive a generator.
However, by burning fossil fuels we are releasing carbon dioxide (CO 2 ) into the atmosphere faster than plants can absorb it.
FOSSIL FUEL FORMATION
Plants absorb carbon dioxide and release oxygen
Plants (and carbon) compact and decay
CURRENT SITUATION IN IRELAND
92% of our oil is imported so we have a much greater dependence than the rest of Europe –
Indigenous production ~ 10% (mostly peat)
We only attain 4% of our energy needs from renewable technologies
12 th May 2006 Carlow Kilkenny Energy Agency
So what is your Carbon Footprint?
Most human activities produce carbon dioxide emissions . Such activities include transport, energy, food production and waste. A carbon footprint is a way to measure the amount of carbon emissions that an activity creates.
The amount of carbon released into the atmosphere is measured in tonnes. The average person in the EU emits 11 tonnes of CO 2 per year .
The Irish fare very poorly when compared to this average; every person in Ireland is responsible for 17 tonnes of carbon entering our atmosphere every year!
Believe it or not, the ideal carbon footprint should be 2/3 tonnes per person per annum.
WWW.REPAK.IE SCHOOLS CARBON CALCULATOR
Where do we use Energy in schools Lighting Heating & Hot Water Appliances Energy
Think about where we use Energy in the school and at home?
- Undertake an Appliance Audit.
Can we Switch it OFF !!!
Where can we make savings? Start by reading the meter.
- Read it to capture normal school activity, plus when the school is empty.
Look at where that energy comes from?
REVIEW YOUR ENERGY USE
WHAT IS 1 KWH?
Electricity is measured in units. Each unit is equivalent to 1,000 watts of electricity used for one hour - or one kilowatt-hour (kWh).
1 kWh in Lasts for an instant electric shower 7 to 10 min an immersion water heater 15 to 20 min a large ring on an electric cooker 20 to 40 min a kettle 20 to 40 min a tumble dryer 20 to 40 min a two-slice toaster 40 to 60 min a washing machine 70 to 100 min a dishwasher 70 to 100 min a desktop computer & monitor 4 to 6 hours a 28-inch TV 6 to 9 hours a 100 watt standard lightbulb 10 hours a 20 watt CFL lightbulb 50 hours
MONITOR YOUR ENERGY USE
Once you build up a record of your energy readings, you can chart this to see if there are any unusual peaks
Look at what your appliance audit revealed – excessive equipment; are there items left on standby; unnecessary items; emersions & water heaters not switched off?
Appoint Energy Monitors / Wardens / Detectives!
Surveys in the school and at home
Inform & Involve
Are all office computers shut down at the end of each day?
Best-case: Switching off a computer at the end of each day can cut its energy consumption in half.
Are all computer monitors switched off during absences of 10 minutes or greater?
Best-case: If the computer is unattended for more than 10 minutes then the monitor should be turned off.
Are photocopiers/printers switched to standby mode when they are not in use for long periods and are they shut down at end of every working day?
Best-case: Photocopiers can consume large amounts of energy while inactive. Stand-by should commence within 10 minutes of last use.
Are timed plugs fitted to vending machines to make sure that they operate only during site hours?
Best-case: A vending machine that is left running continuously can cost over €600 a year to operate, so ensure that they are only powered up during site operating hours.
Are water boilers left running continuously?
Best-case: Water boilers should be switched off outside of main usage hours; jug kettles can be used to boil water during these periods.
Are all hand dryers automatically activated?
Best-case: Automatic hand dryers should be installed, as they do not operate unless they are actually needed.
EXAMPLE: BOILER EFFICIENCY
Has your school boiler been serviced and maintained regularly?
A 12kW oil boiler with an efficiency of 60% heats a house for 2,000 hours per year. If gas costs 7c/kwh, how much does it cost to run the boiler?
12kW x 2,000hrs = 24,000kWh
24,000kWh / 0.6 = 40,000kWh
40,000kWh x 7c/kWh = €2,800
EXAMPLE: NEW BOILER
If a new condensing boiler is installed with an efficiency of 90%, what will the running cost be per year?
12kW x 2,000hrs = 24,000kWh
24,000kWh / 0.9 = 26,666kWh
26,666kWh x 7c/kWh = €1,866
Saving of €934 per year
WHAT ENVIRONMENTAL MANAGEMENT LIKE THE GREEN SCHOOLS PROGRAMME OFFERS
Control over your energy use
“ You cannot monitor what you don’t measure!”
SEI estimate that 15-20% of energy savings can be made through behavioural changes
LOW COST savings
Green Schools research: schools saving 3.65 million units of electricity per year