当涂县档案局举办新农村建设档案工

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1、ENERGYRENEWABLEENERGY-Inexhaustiblesourceofenergy.Ex-solar,Hydro,Wind,Tidal&GeothermalNON-RENEWABLEENERGY-Exhaustiblewithtime.Ex-Fossilfuels,Nuclearfuels.SOLARENERGYEarthReceives1018kwhofsolarenergyeveryyearThesurfaceoftheearthreceivesabout1014kWfromsunObstaclesinharnessingsolarenergyItisno

2、tconstantlyavailableonearthThussomeformofstorageisneededtosustainsolarenergythroughthenightandduringrainyseasonSolarenergyisdiffused.SOLARWATERHEATINGFlatplatecollectorParabolicorconcentratingcollectorFlatplatecollectorTheabsorberplateismetallic.Itisusuallycoatedblacktoabsorbmoreheatenergy.

3、Tubes,passagesorchannelsintegralwiththecollectorcarrywaterorotherworkingfluid.Insulationshouldbeprovidedatthebackandatthesidestominimizetheheatlosses.Usuallyglasswoolisusedasinsulationmaterial.ParabolicorconcentratingcollectorThereflectorwillhaveaparabolicshapesothatthesunraysstrikingthepro

4、filewillbereflectedonitsfocalpoint.Ifatubecarryingafluidiskeptalongthefocalline,thefluidwillbeheatedtoaveryhightemperature.LowtemperaturesystemThissystemusesaflatplatecollector,whichcanheatwateruptoabout800Conly.Wateriscirculatedthroughtheflatplatecollector.Heatexchangerisusedtovaporizealow

5、boilingfluid(butane)andthebutanevaporwillruntheturbineHightemperaturesystemAreceiverismountedonthetowerwhichis100to500mhighreflectingmirrorsareknownasheliostat.Theheliostatarearrangedinsuchawaythattheydirectthesolarenergyonthereceiverthroughouttheday.Thereceiverisdesignedandpositionedinsuch

6、awaytointercept,absorbandtransfermaximumheattoworkingfluid.Thetemperatureachievedis15000Cto17000CADVANTAGESRenewablesourceofenergyPollutionfreeAfterthecapitalcost,thecostofpowergenerationisquitelowWiderangeofapplications,poweringstreetlightstosatellitesDISADVANTAGESCapitalcostisveryhighLarg

7、eareaoflandisrequiredLargenumberofsolarpanelsarerequiredAffectedbyseasons.WINDENERGYElectricalenergycanbegeneratedbywindenergybyutilizingthekineticenergyofwindWindmillsareclassifiedintotwotypesHorizontalaxiswindturbineVerticalaxiswindturbineHORIZONTALAXI