energy in the home- world of teaching

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1、energyBytheendofthisunityoushould:-Knowthatenergyisrequiredforheating,lightingandoperatingappliances.Knowthatenergycanbesuppliedfromelectricity,gasoil,orsolidfuel.Knowthatthecostofhomeheatingdependsonthefuelandinstallationcosts.Knowthatthecostofrunninganapplianc

2、edependsonthepower.EnergyinthehomeenergyenergyinthehomeKnowthatenergycostscanbecalculatedfromthedifferencebetweentwometerreadings.Knowthatenergylossescostmoney.Knowthatenergycanbelostbyconvection,conductionandradiation.Knowthatheatlosscanbecutdownbyinsulation,do

3、ubleglazing,anddraughtexcluders.Knowthatheatwastecanbecutdownbyforexampleusingshowersinsteadofbaths.energyenergyinthehome10.Knowthatmanyappliancesusethermostatstokeepasteadytemperature.heatinglightingcookingfunThesearethefourmainactivitiesthatpeopleuseenergyfori

4、nahouse.energy1.Bylookingatthepictureshown,listthenumberofwaysinwhichenergyisused.Whichappliancesusethemostenergy?energyenergyinthehomeEnergycanbesuppliedtothehomeinthreeways.Electricity:-thisisbroughttousfrompowerstations.Itcomesviapylonsandundergroundcables.Ga

5、s:-thiscomesfromthenorthsea.Itispumpedalongpipelinestogasstations.Solidfuel:-thisistheformofcoal,woodorpeat.Coalisminedandpeatiscutfromtheground.typesofheatingMosthousesuseeitherGascentralheating.Electriccentralheating.Gasfires.4.Electricfires.energyusesofenergy

6、inthehomeHotwater20%TV10%cooking10%RoomHeating65%energyusesofenergyinthehomeThenextslideshowstheusesofenergyinthehome.Theusesare:-1.Hotwater20%.2.T.V.,lightsetc.:-5%.3.Cooking:-10%.4.Roomheating:-65%.Thinkofotherappliancesandaddthemtothediagram.energywhichfuel?W

7、eseefromthepiechartandpreviousslidesthat:-Morethantwothirdsofenergyisusedforheatingandlighting.Thisenergycancomefromcoal,gas,orelectricity.Thefollowingtablecomparesthecostofinstallingandrunningthethreedifferenttypesoffuel.energywhichfuelcont`d?2Bedroomflatwithou

8、tcavitywallinsulationSolidfuelMainsgaselectricityinstallingRunningCostperyear£1400£1200£800£300£240£210energywhichfuelcont`d?Onceyouhavecopiedthepreviousslide,copyand