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1、DirectPlasmadynamicConversionofPlasmaThermalPowertoElectricityforMicrodistributedPowerApplicationsR.M.MayoandR.L.MillsBLPInc.Cranbury,NJ08512Abstractdevices,possessingonlyweaklyionizedandrelativelycoldplasmas,conversionmethodsmorecompatibleAmicrowaveplasmasourcewithinputpowerlevelsupwithafluidenv
2、ironmentlikeMHD[7]orPDC[8]are3to12.83W/cmthatprovidesreproducible,stablerequired.plasmaswithpowerdensitiesontheorderofthoseofchemicallyassisted(CA-)plasmaswasusedtoHerein,wedemonstratetheplasmadynamicconversioncharacterizeplasmadynamicpowerconversion(PDC)(PDC)ofplasmathermaltoelectricalenergyusin
3、gofplasmathermalpowertoelectricity.PDCextractedmicrowaveplasmacellsasatestbedfortheconversionelectricalpowerapproaching2Whasbeenachievedasprocess.AsinMHDconversion,PDCextractsstoredademonstration.Itisenvisionedthatsuchasystemplasmaenergydirectly.UnlikeMHD,however,PDCmaybereadilyscaledtoafewhundre
4、dWattstodoesnotrequireplasmaflow.Instead,powerseveral10'sofkWoutputpowerformicrodistributedextractionbyPDCexploitsthepotentialdifferencecommercialapplications(e.g.household,automotive,establishedbetweenamagnetizedandanlightindustry,andspacebasedpower).Themostunmagnetizedelectrode[9]immersedinapla
5、smatoimportantconsiderationincollectoroutputdrivecurrentinanexternalloadand,thereby,extractperformanceisshowntobeplasmaconductivity.electricalpowerdirectlyfromthestoredplasmaIncreasingcollectorsurfaceareaincontactwiththethermalenergy.Forthefirsttime,asubstantialplasma,plasmachargecarrierdensity,a
6、ndplasmaquantityofelectricalpowerisextracted(~2W).temperature,andreducingthefillgaspressureallFurtherpowerscale-uptocommerciallyappropriateincreasetheextractedpower.Peakperformanceispowerlevelsisnowrealizable.Theengineering3foundat0.5TorrfillofHeat50sccmat8.55W/cmrelationshipslearnedfromthesesimu
7、lationstudiescaninputpowerwheretheloadmatchis250ΩandpeakbeappliedtoconvertingthethermalpowerfromCA-3plasmastoelectricalpower.extractedpoweris1.87Wor3.6W/cm(21.8V,86mA)foravolumetricconversionefficiencyof42%.TheoryIntro
