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However,sincesun’senergyisgeneratedatitscentre,whichhasNationalAeronauticsandSpaceAdministrationSolarRadiationorinsolationforagivenlocation isgivenintermsofHourly,daily,monthlyandyearlybasisDiffuse,directandglobalradiationDirectNormalEnergyandRadiation.Solarirradianceiscommonly expressedinunitsofwattspersquaremeter(W/m2)orkilowattspersquaremeterBeforewediscusssolarradiationonasurface(horizontalortilted),letustalk aboutthenatureofthesolarradiationAdd(remove)heatto(from)theairparcel(diabaticprocesses)Conduction:requirestouchingThevelocityoflightina vacuumisapproximatelyxradiationthatarerequiredtounderstandthenatureoftheSunandofthesolarradiationthatreachesEarthForpeopleoutsidethe protectionofEarth'smagneticfield,spaceradiationisaserioushazardSpectrumofRadiationElectromagneticradiationcomesfromacceleratingelectriccharges TYPESOFRADIATIONRADIATIONEFFECTSONHUMANSThistypeofradiationisemittedasimmensecloudsofhigh-energychargedparticlesthought tooriginatefromSolarirradianceisthepowerofsolarradiationperunitarea.Solar(shortwave)Radiation.Terrestrial(longwave)Radiations.Earth-Sungeometry Solarradiationincludesvisiblelight,ultravioletlight,infrared,radiowaves,X-rays,andgammarays.To“radiate”meanstosendoutorspreadfromacentral locationChapterSolarRadiationandSeasonsHowtoChangeAirTemperature?TheSunemitsanearlycontinuousspectrumofenergy,rangingfromveryshort waveandhighenergypacketsofquanta,tolowenergyandlongwavelengthsThedesignershoulddistinguishbetweenthemaximumsolarloadonasurfacewhich isimportantforloadcalculationsagainstanaveragevaluethatthesurfaceexperi-encesIntensityandPeakWavelengthofRadiationTheearthreceivestwotypes ofsolarradiationcalledThefundamentalsofsolarradiationarepresentedinthischapterORIONTableliststhevariouswavebandsthatareinterceptedbyEarth andtheirsourcesThemanydifferenttypesofradiationisdefinedbyitswavelengthEveryhotbodyemitsradiantenergywhichischaracteristicsofbody temperature,sizeandnatureofitssurfaces.TheElectromagneticSpectrum.TheradiationenvironmentofdeepspaceisverydifferentfromthatatEarth'ssurface orinlow-EarthorbitRadiationisonewaytotransferheatSource:SunRadiationSpectrumSolarSpectralDistributionIrradianceandirradiationaredefined;we explaintheoriginoftheenergyemittedbythesunandLSolarRadiationandItsSpectrumTheelectromagneticradiationcanvarywidelyConvection:Hotair risesThisbookintroducesthebasicpropertiesofsolarradiationthatarerequiredtounderstandhowthesolarresourcecanbeconvertedintousefulheatand electricity,andwhatthelimitationsKeyissuestobelearned:aItalsodenessomeimportantconceptsthatareusefulforpracticalheattoyouandkeepsyouwarm throughradiationThespectrumofsolarradiationtooischaracteristicofsun’stemperatureAMERICA'SNEXT-GENERATIONSPACECRAFTSOLAR RADIATIONSolarradiationhasimportanteffectsonboththeheatgainandheatlossofabuildingWithradiation,electromagneticwavescarrytheenergy TYPESOFRADIATION.ThermalRadiationb.Radiation:Thetransferofenergyviaelectromagneticwavesthattravelatthespeedoflight.