Search results for "renewable energy source"

showing 10 items of 451 documents

Methanol electrooxidation with Cu-B catalyst

2016

In the last few years alternative energy sources have been fast developing. One of these sources is fuel cell. Due to development of the renewable energy sources, the powering of fuel cells with bio-fuels is very important. The one of this fuel is methanol. The use of fuel cells on a large scale is mainly limited by the high cost of catalysts - mainly platinum. Elimination of Pt as catalyst would allow for wider commercial application of fuel cells. The paper presents a study of methanol electrooxidation on electrode with Cu-B alloy catalyst. Researches were done by the method of polarizing curves of electrooxidation of methanol in glass vessel. An aqueous solution of KOH was used as the el…

fuel cellbio-fuelelectrooxidationrenewable energy sourcesCu-B catalystmethanolenvironment engineeringInfrastruktura i Ekologia Terenów Wiejskich - Infrastructure and Ecology of Rural Areas
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Canola oil electrooxidation in an aqueous solution of KOH - Possibility of alkaline fuel cell powering with canola oil

2016

In the last few years alternative energy sources have been fast developing. One of these sources is fuel cell. Due to development of the renewable energy sources, the powering of fuel cells with bio-fuels is very important. Vegetable oil is an alternative fuel for Diesel engines and for heating oil burners. Powering high efficiency power sources like fuel cells with renewable fuels (like vegetable oil) will allow development of renewable energy sources and elimination or reduce of toxic substances emissions. The paper presents the possibility of using canola oil as fuel for fuel cells. The work shows possible electrooxidation of canola oil emulsion prepared on the basis of a nonionic surfac…

fuel cellbiofuelcanola oilelectrooxidationrenewable energy sourcefuelenvironmental protectionJournal of Power Technologies
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Possibility of using NiCo2O4 alloy as catalyst for fuel electrode of hydrazine fuel cell

2017

Szerokie stosowanie ogniw paliwowych ograniczone jest głównie wykorzystywaniem drogich katalizatorów. Wyeliminowanie platyny umożliwiłoby szeroką komercjalizację tych ogniw. Artykuł przedstawia analizę elektroutleniania hydrazyny na katalizatorze NiCo2O4. Jako elektrolit wykorzystano wodny roztwór KOH. Pomiarów dokonano potencjostatem. Wykazano możliwość elektroutleniania hydrazyny na katalizatorze NiCo2O4. W każdym przypadku (dla wszystkich stężeń hydrazyny i udziałów Co) proces elektroutleniania zachodził. Gęstość prądu wynosiła 15–35 mA/cm2 dla wszystkich koncentracji hydrazyny i elektrolitu. Gęstość prądu jest niewielka, jednak koszt uzyskania katalizatora jest znacznie niższy od kosztó…

fuel cellodnawialne źródła energiiclean technologykatalizator NiCo2O4ogniwo paliwowehydrazineinżynieria środowiskarenewable energy sourceshydrazynaczyste technologieNiCo2O4catalystenvironment engineeringRudy i Metale Nieżelazne
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Stop Ni - Co jako katalizator anody ogniwa paliwowego zasilanego alkoholem metylowym

2016

fuel cellodnawialne źródła energiienvironmental engineeringNi - Co catalystogniwa paliwoweinżynieria środowiskakatalizator Ni - Corenewable energy sourcesmetanolmethanol
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Możliwość bezpośredniego zasilania ogniwa paliwowego biopaliwem

2017

Praca przedstawia analizę możliwości zasilania ogniw paliwowych biopaliwami. Analizy dokonano na podstawie rozpoznania pozycji literaturowych oraz badań własnych. Przeanalizowano wykorzystanie biogazu, wodoru pozyskanego metodami biologicznymi, wykorzystanie alkoholu metylowego oraz olejów roślinnych. Wykazano, że w przypadku metanolu istotnym jest poszukiwanie katalizatorów nie zawierających metali szlachetnych, natomiast w przypadku olejów roślinnych uzyskiwane wartości gęstości prądu nie pozwalają obecnie na zbudowanie ogniwa paliwowego o dużej wydajności. Wykazano, że jednak istnieje możliwość zasilania ogniw paliwowych biopaliwami, jednak konieczne są jednak, prace zmierzające do podwy…

fuel cellodnawialne źródła energiienvironmental engineeringsustainable development: ogniwa paliwowezrównoważony rozwójbiopaliwainżynieria środowiskarenewable energy sourcesbezpośrednie pozyskiwanie energii elektrycznejbiofuelsdirect electricity production
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Wykorzystanie ogniw paliwowych jako elementu zrównoważonego rozwoju

2018

W ostatnich latach coraz szybciej rozwijają się technologie wykorzystujące alternatywne źródła energii. Jedną z nich jest technologia ogniw paliwowych. Ogniwo paliwowe przekształca paliwo chemiczne w sposób bezpośredni (z pominięciem procesu spalania) w energię elektryczną. Ponadto charakteryzuje się wysoką sprawnością. Sprawność ogniw paliwowych jest dwukrotnie wyższa od sprawności silników cieplnych. Ponadto ogniwa paliwowe mogą być zasilane biopaliwami. Szybki rozwój wykorzystania ogniw paliwowych na dużą skalę może przyczynić się do obniżenia zużycia paliwa, a także emisji dwutlenku węgla,tlenków azotu i innych. W pracy przedstawiono analizę bezpośredniej produkcji energii elektrycznej …

fuel cellodnawialne źródła energiisustainable developmentogniwo paliwowezrównoważony rozwójinżynieria środowiskarenewable energy sourcesenvironment engineering
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Electricity production from waste engine oil from agricultural machinery

2017

As fuel for fuel cells can be used various substances, but generally fuel cells are powered by hydrogen. However, problems with the storage of hydrogen are the reason for the search of new fuels for fuel cells. Moreover, annually are produced huge amount of waste oils. These oils must be directed to purification and processing. It would be important to use waste engine oil as fuel for fuel cell to direct electricity production without intermediate stage e.g. combustion. The paper presents the possibility of using waste engine oil as fuel for fuel cell. The oil does not have the feature of electrical conductivity, for this reason a detergent was used for dissolving oil in an electrolyte. So,…

fuel cellwaste engine oilenergy sourceelectrooxidationrenewable energy sourcesenvironment engineeringInfrastruktura i Ekologia Terenów Wiejskich - Infrastructure and Ecology of Rural Areas
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Effects of Functional Strength Training on Functional Movement and Balance in Middle-Aged Adults

2021

Functional movement deficiencies cause falls and injuries in adults. Functional strength training (FST) is emerging as a new training method for athletes, middle-aged and older adults, to improve functional movement: The present study was conducted in order to investigate the effects of FST on balance and functional movement in healthy and independent middle-aged adults. The sample for this study consisted of 46 physically active individuals (24 female and 22 male). A total of 46 subjects were divided based on randomly into the functional strength training (FST) group (n = 26) aged: 51.55 ± 3.73 years; height: 168.69 ± 8.8 cm; body mass: 75.88 ± 12.18; and traditional s…

functional strengthFunctional trainingmedicine.medical_specialtyAdults Balance Fall risk FMS Functional strengthStrength trainingfall riskGeography Planning and DevelopmentStatistical differenceTJ807-830Management Monitoring Policy and LawTD194-195Renewable energy sourcesadults; balance; fall risk; FMS; functional strength03 medical and health sciences0302 clinical medicineadultsmedicineGE1-350030212 general & internal medicineFunctional movementBalance (ability)Environmental effects of industries and plantsbiologyRenewable Energy Sustainability and the EnvironmentAthletesbusiness.industryFMSbalance030229 sport sciencesbiology.organism_classificationTraining methodsEnvironmental sciencesBalance performancePhysical therapybusinessSettore M-EDF/01 - Metodi E Didattiche Delle Attivita' Motoriehuman activitiesSustainability
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deaR-Shiny: An Interactive Web App for Data Envelopment Analysis

2021

In this paper, we describe an interactive web application (deaR-shiny) to measure efficiency and productivity using data envelopment analysis (DEA). deaR-shiny aims to fill the gap that currently exists in the availability of online DEA software offering practitioners and researchers free access to a very wide variety of DEA models (both conventional and fuzzy models). We illustrate how to use the web app by replicating the main results obtained by Carlucci, Cirà and Coccorese in 2018, who investigate the efficiency and economic sustainability of Italian regional airport by using two conventional DEA models, and the results given by Kao and Liu in their papers published in 2000 and 2003, wh…

fuzzy deaOperations researchComputer scienceGeography Planning and Development0211 other engineering and technologiesTJ807-83002 engineering and technologyManagement Monitoring Policy and LawTD194-195Fuzzy logic:CIENCIAS ECONÓMICAS [UNESCO]R softwareRenewable energy sourcesmalmquist indexSoftwareMalmquist indexDEA0202 electrical engineering electronic engineering information engineeringData envelopment analysisFuzzy numberWeb applicationGE1-350fuzzy DEAMeasure (data warehouse)021103 operations researchEnvironmental effects of industries and plantsRenewable Energy Sustainability and the Environmentbusiness.industryshinydear packageUNESCO::CIENCIAS ECONÓMICASMissing dataVariety (cybernetics)Environmental sciencesdeaefficiency020201 artificial intelligence & image processingdata envelopment analysisdeaR packagebusinessr softwareSustainability
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Active Learning on Trust and Reciprocity for Undergraduates

2019

We propose a teaching activity aimed at promoting social values, such as trust and reciprocity, among undergraduate students in economics and related degrees. We present our pilot experience of what we call RED&ndash

game theoryGeography Planning and DevelopmentTJ807-830Management Monitoring Policy and LawSocial value orientationsTD194-195Social preferences:CIENCIAS ECONÓMICAS [UNESCO]Renewable energy sourcesreciprocityDictator gameReciprocity (social psychology)0502 economics and businessComputingMilieux_COMPUTERSANDEDUCATIONGE1-350050207 economicsClass (computer programming)Environmental effects of industries and plantsEarningsexperimentRenewable Energy Sustainability and the Environment05 social sciences050301 educationUNESCO::CIENCIAS ECONÓMICAStrustEnvironmental sciencesActive learningsustainable educationPsychology0503 educationSocial psychologyGame theorySustainability
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