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ENERGYEFFICIENCYATHOME
Didyouknow…
ThattheaverageenergyusebyAustraliansismorethantwicethatoftheworldaverage?
ThattheenergyusedperpersoninPapuaNewGuineais20timeslessthantheenergyusedperpersoninAustralia?
Thatbetween10and15percentofallenergyusedinAustraliaisusedinourhomes?
That40percentoftheenergyconsumedinQueenslandhomesisusedtoheatwater?(Checkoutthepiegraphbelow.)
That90percentoftheenergyweuseinourhomeshasaharmfuleffectontheenvironment?
Readontolearnmoreaboutwhatwecandoinourhomestoreducetheeconomicandecologicalcostsofourenergyuse.
(Note:Economiccostsaretodowithdollars.Ecologicalcostsaretodowiththehealthandwellbeingoftheplanetandthelifeitsupports.)
Peoplecanbecomemoreenergy-efficientintheirownhomes.Beingenergy-efficientmeansmakingbetteruseoftheenergyweusetolightourhouses,runappliancesandheatandcoolourhomes.InQueensland,forexample,mostofourelectricitycomesfromcoal-firedpowerstations.Wealsousegasinourhomesforappliancessuchasstovesandhotwatersystems.Ifwebecamemoreenergy-efficient,wewoulduselesscoalandgas.Itisimportanttouselesscoalandgasfortworeasons:
Suppliesofcoalandgasarelimited
Toreducethepercentageofcarbondioxide(CO2)gasemissionsthatareharmfultotheearth.
Coalandgasareformsofnon-renewableenergy.Energyusedinhomescancomefromnon-renewablesourcesorrenewablesources.Non-renewablesourcesincludefossilfuelssuchascoal,oilandnaturalgas.
Theseformsofenergytakemillionsofyearstoform.Renewableresourcesarethosethatareconstantlybeingrenewedorcreatedandareunlikelytorunout.Renewableenergysourcesincludesolarenergy,hydropowerandenergygeneratedorproducedfromwind,wavesandtides.
Mostenergyusedinhomestoheatandcool,runappliancesandpowerlightscomesfromnon-renewablesupplies.Atpresentweareusingtheseresourcesfasterthantheearthcanreplacethem.Weneedto:
Usemorerenewableenergyinourhomes
Cutdownouruseofnon-renewableenergysources,thatis,theelectricityandgasweuseinourhomes.
Didyouknowthattheenergyrequiredtokeepa100wattglobeburningfor10hoursproduceskilogramsofCO2?
DidyouknowthattheaveragehouseholdinQueenslandcouldsaveseventonnesofcarbondioxide(CO2)ingasemissionsbyusingrenewableenergyinsteadofnon-renewableenergy?
Haveyoueverwonderedhowmuchitcoststorunparticularappliancesusingelectricity?
It’seasytoworkout.Justfollowtheformula:Cost=powerrating(kW)xhoursofusexunitpriceofelectricity.Usingthisformula,wecanworkouthowmuchitcostsaconsumerindollarstorunacomputereverydayoftheyearfortwohoursperday.
Powerrating
=
600W(divideby1000toexpressaskilowatts)
=
600dividedby1000kW
=
kW
Hoursofuse
=
2hours
Unitpriceofelectricityused
=
10centsperkWh
Costofusingcomputerfor2hours
=
kWx2hoursx10centsperkWh
=
12cents
Costperyear
=
12centsx365days
=
$
Thecostofrunningacomputerfortwohoursperdayforoneyearis$.
That’stheeconomiccostofrunningthecomputerforayear.Whatdoyouthinktheecologicalcostwouldbe?Emissionofcarbondioxide(CO2)duringproduct
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