cook use biomass which common practic develop countri caus rampant deforest exposur emiss henc util solar energi cook green solut solar radiat avail everi hour day thermal storag essenti avail thermal energi requir time use therefor work investig effici solar cooker parabol concentr collector integr thermal storag use finit differ comput model cook stove pack pebbl bed thermal storag have 03 diamet 09 height storag capac 401 energi dure clear day 1285 energi simul charg discharg cook under addis ababa climat condit day highest lowest solar irradi thermal storag effici 667 cooker thermal effici 45 dure discharg heat forc convect 41 dure discharg heat conduct were obtain day highest solar irradi the overal effici cook stove thermal storag 30 22 discharg forc convect conduct respect for day lowest beam solar irradi storag thermal overal effici were 709 311 220 respect henc can conclud solar concentr cooker thermal storag can have overal cook effici between 22 30 clear sky day when sun overhead tropic area

Dejene Kebede Kedida

Demiss Alemu Amibe

Yilma Tadesse Birhane

Performance of a Pebble Bed Thermal Storage Integrated with Concentrating Parabolic Solar Collector for Cooking

ear failur bear wind turbin drivetrain have increas after introduct power electron switch which lead shaft voltag bear current presenc voltag ruptur bear insul could occur due sever plausibl electrophys mechan viz asper electr breakdown particl etc the flow high amperag current through bear dure breakdown mechan could lead earli failur our aim understand electr behaviour bear elabor equival electr circuit model emphas particleiniti breakdown presenc shaft voltag particl form path low resist through bear result flow shaft bear current which could caus prematur failur bear particl arizona test dust atd carbon black aluminium powder fine iron powder were mix lubric particl concentr rang between 75 150 the breakdown characterist electr insul bear dure given test quantifi time conduct which express percentag time bear conduct state dure test investig time conduct differ lubric sampl conduct along studi effect start stop rotat shaft the electr conduct natur particl play role breakdown bear voltag fix concentr 150 insul breakdown event were highest lubric atd follow iron powder aluminium power carbon black particl the time conduct increas 24 time same test lubric particl concentr increas from 75 150 the current activ reduc almost half test after stop shaft rotat the resist bear dure insul breakdown event highest aluminium powder follow fine iron powder carbon black atd

Abhishek Joshi

Jörgen Blennow

Investigations of Particle-Initiated Insulation Breakdowns in Bearings

this paper present model electr perform typic panel modul which kyocera 200gt constant electr load which under weather condit tropic region the specif case citi jigjiga 935 428 locat eastern region ethiopia consid electric characterist modul determin basi detail numer algorithm which design base test numer techniqu from review articl the overal evalu hour variat electr perform modul done mean graphic techniqu which determin oper point modul voltag current plane each load perform panel compar each load the electr load result highest daili energi output panel daili basi 11 day month januari out 12 consid day last day result poorer perform respect other two electr load electr load

Elias M. Salilih

Yilma T. Birhane

Modeling and Analysis of Photo-Voltaic Solar Panel under Constant Electric Load

design treatment plant faecal sludg manag system reli comprehens accur knowledg faecal sludg characterist inform lack develop countri like ghana where larg proport urban popul accra reli onsit sanit system face lot fsm faecal sludg manag design challeng result lack comprehens studi data physicochem characterist raw faecal sludg after primari dewat achiev fulli oper fsm chain would impli well understand characterist it dynam after primari dewat studi carri out determin characterist faecal sludg brought lavend hill treatment plant accra metropoli environ ensur treatabl use product after treatment the treatment plant receiv averag 150 truck 1350m 3 day 58 come from privat home 42 from public toilet composit sampl were made from both public privat toilet facil sampl were taken from reservoir hold faecal sludg from both public privat facil examin daili basi character the valu obtain show high concentr bod cod valu the cod bod ratio show faecal sludg stabil yet can further degrad the calorif valu dri sludg found 15161582 16391831 wet sludg the calorif valu sludg adequ enough use potenti feedstock green energi generat the high concentr cod organ matter faecal sludg make suitabl enough bioga generat good correl between calorif valu tvs found heavi metal concentr were low satisfi epa ghana guidelin sludg thus product from treatment can use agricultur purpos

Issahaku Ahmed

Dennis Ofori-Amanfo

Esi Awuah

Florence Cobbold

A Comprehensive Study on the Physicochemical Characteristics of Faecal Sludge in Greater Accra Region and Analysis of Its Potential Use as Feedstock for Green Energy

methanogen restrict few genera archaea howev have great import carbon cycl impact climact consider also find role renew energi form bioga here examin microbi contribut product methan sargassum fed anaerob saltwat bioreactor which poor character compar fresh water bioreactor use comprehens function metagenom approach despit abund product methan detect low proport archaea system use 16s rrna communiti profil analys address low represent use addit 16s rrna analysi shotgun data consider 2 4 product using novel network align tree build approach measur similar between metametabol capabl differ anaerob microbi communiti the saltwat bioreactor sampl cluster togeth valid approach provid method determin metametabol similar between microbi communiti rang potenti applic also introduc number addit approach examin interpret metametabol network topolog the low abund methanogen appear common properti anaerob system like reflect relat poor energet methanogen while examin key enzym confirm hydrogen produc bacteria major ferment guild our result indic use readili avail seawat marin macroalga promis approach product bioga sourc renew energi

D. Derilus

A. Forestil

J. Fortuné

O. Polyanska

C. Louime

G. Gervais

S. E. Massey

Functional Metagenomics Characterization of an Anaerobic Saltwater Bioreactor

most concentr system be use photovolta applic illumin modul uniform which result power output reduct this studi investig electr perform three modul cell connect differ configur address nonuniform illumin effect modul 1 standard modul consist 11 solar cell connect seri wherea modul 2 propos design 11 cell three group each group consist differ cell seri connect modul 3 also new design 11 cell two group each group consist differ cell connect seri the new modul were design way effect nonuniform illumin should affect group cell entir modul lead high power output the modul were test under three differ intens uniform low nonuniform high nonuniform illumin when modul were test uniform illumin total maximum power output modul 1 higher than modul 2 modul 3 about 7 howev when modul were test low nonuniform illumin total maximum power output modul 2 higher than modul 1 modul 3 about 4 7 respect this differ increas about 12 modul 3 17 modul 1 when modul were test high nonuniform illumin therefor best modul design address nonuniform illumin effect solar collector modul 2 practic situat impli manufactur modul should consid design modul group cell seri connect instead all cell be connect seri

Damasen Ikwaba Paul

Experimental Characterisation of Photovoltaic Modules with Cells Connected in Different Configurations to Address Nonuniform Illumination Effect

paper experiment theoret power output hybrid photovolta cell were analys compar three differ weather condit clear sky partial cloudi overcast day the hybrid photovolta cell consist low effici cell monocrystallin strip bosch 2bb monocrystallin cell high effici cell the current voltag experiment result were measur use optim resist load method theoret daili power output hybrid cell calcul base hour incid energi each section size section electr convers effici each section the hybrid cell evalu within lowconcentr symmetr compound parabol concentr suitabl build integr tilt 54 found theoret daili power output clear sky partial cloudi overcast day higher than experiment result 136 109 121 respect the discrep due loss result connect wire seri resist effect oper temperatur effect consequ fix resist load howev valu optim resist load had much impact experiment power output elimin restrict optim resist load experiment result recommend use data acquisit system photovolta peak power measur devic 6020c 6020c keithley 2651a sourcemet

A Comparison Analysis of the Experimental and Theoretical Power Output of a Hybrid Photovoltaic Cell

due fast growth singlephas gridconnect photovolta system exist grid code expect modifi guarante avail qualiti reliabl electr system therefor futur singlephas system should becom smarter support low voltag ridethrough lvrt capabl which requir threephas wind power system paper oper principl flyback invert lowvoltag ridethrough oper demonstr order map futur challeng the steadi state perform flyback invert under voltag rise drop condit boundari conduct mode bcm discontinu conduct mode dcm studi theoret the simul result flyback invert various grid fault present verifi theoret analys the result indic fact flyback invert bcm condit can provid lvrt capabl photovolta microinvert applic distribut generat system even though doe need ani auxiliari control branch ani limit compon design

Sajad Arab Ansari

Amir Reza Mizani

Siamak Ashouri

Javad Shokrollahi Moghani

Fault Ride-Through Capability Enhancement for Microinverter Applications

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Journal of Renewable Energy publishes papers relating to the science and technology of renewable energy generation, distribution, storage, and management. It also covers the environmental, societal, and economic impacts of renewable energy.

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Journal of Renewable Energy