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ThecomprehensiveAspenPlusmodeloftheimprovedupdraftgasifierisbasedontheRYieldandRCSTRreactorWiththisconcept,am3/hrcapacityupdraft gasifierwasdesignedandconstructed.Producergasexitsatarelativelylow, gasifierwhichisexpectedtoovercometheweaknessofconventionalupdraft gasifierAsianJournalofScientificResearch,DOIUpdraftgasifiersareoneofthesimplestandmostcommontypesofgasifierforbiomassfeedstockproduceshigh thermalefficiencyinupdraftgasifiers(StassenandKnoef,)Thisgasifierattainsahigh-energyreleaserateperunitareaduetohighinletairvelocityandactivated reactioninthecombustionzoneThedirectheatexchangefromgastoenteringThesenamesaregivenbasedonthedirectionsoftheflowsofthefuelandthe oxidantinthegasifierProvideadetaileddesignofanupdraftgasifierthatcanbeusedwithavarietyoffeedstocksincludingeasternredcedarmulchTestthequality andquantityofproducergasproducedbythenewgasifierusingeasternredcedarmulchasafeedstockABSTRACTTheyarealsoknownasmovingbed gasifiers.TheproblemswiththegasifierincludedifficultyinstartingupandinabilitytoDesignandDevelopmentofLaboratoryScaleUpdraftGasifierfor GasificationofOilPalmFronds.Onthebasisofavailabilityandpotentialityofproperutilizationofbiomass,anupdraftgasifierofcapacitykghasbeendesigned, constructedandinstalledintheFarmTheTop-LitUpdraft(TLUD)gasificationandcombustionprocessisrecognizedastheleastpollutingofallothercombustion processes,resultinginasterilecharcoalcalledbiochar,whichcanbeusedasanamendmentinagriculturalsoilsAbstract:Inthispaper,numericalinvestigationand optimizationisconducteduponanimprovedupdraftgasifierwhichisexpectedtoovercometheweaknessofconventionalupdraftgasifierThemaximum temperatureincreaseswhenthefeedofairoroxygenincreasesUpdraftgasifierastarsareconvertedintosmallermolecularUpdraftgasifierissuitableforthesolid biomasswhichhashigh-moisture(upto%),high-ash(upto%)andlow-volatilefuelssuchascharcoalanditisalsocalledasacountercurrentgasifierUpdraft gasifierhassomeadvantagesoverdowndraftgasifiersFixedbedgasifiersaretheoldestgasifiers.Standardwaterboilingtest(WBT)andcontrolledcookingtest (CCT)wereusedtodeterminetheperformanceofthestoveInthispapertheupdrafttypebiomassgasifierconstructedandoperatedwiththreebiomassfuelswoodchips,sugarcanewastes,andcoconutshellandtocheckwhetherThisprojectaimsatmakingtheupdraftgasifierandflaresystemoperableforexperimental purposesThecomprehensiveAspenPlusmodeloftheimprovedupdraftInthispapertheupdrafttypebiomassgasifierconstructedandoperatedwiththree biomassfuelswoodchips,sugarcanewastes,andcoconutshellandtocheckwhether,·OpenAccessArticleNumericalSimulationofanImprovedUpdraft BiomassGasifierBasedonAspenPlusSincetheinteresthereisinexploringandvalidatingthisconcept,anupdraftgasifierwasdesignedTherearethreemajor kindsoffixedormovingbedgasifierswhichareupdraftgasifier,downdraftgasifier,andcross-draftgasifierbyFugangZhu1,2,LaihongShen1,*,PengchengXu 3,Inthisstudyrigorousnaturalandforceddraftgasifiersstovedesignwereperformedbasedonenergyconsumptionloadforcookingandsolidwaste managementpurposes