About: Detailed thermodynamic analysis of fuel cell efficiency

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	Efficiency of hydrogen fuel cells is analyzed using a non-equilibrium theory of mixtures based on classical irreversible thermodynamics. The efficiency is expressed in terms of processes taking place inside the fuel cells revealing which processes are responsible for efficiency losses. This provides a new method of optimization. It is shown that efficiency losses are not only given by entropy production rate but also by some additional terms, which become important if steep gradients of temperature are present. Consequently, we compare the new theory with the standard entropy production minimization approach. Finally, we discuss effects of the additional terms in polymer electrolyte membrane fuel cells and in solid oxide fuel cells showing that the new theory gives the same results as the standard theory in the former case while it becomes important in the latter case. Efficiency of hydrogen fuel cells is analyzed using a non-equilibrium theory of mixtures based on classical irreversible thermodynamics. The efficiency is expressed in terms of processes taking place inside the fuel cells revealing which processes are responsible for efficiency losses. This provides a new method of optimization. It is shown that efficiency losses are not only given by entropy production rate but also by some additional terms, which become important if steep gradients of temperature are present. Consequently, we compare the new theory with the standard entropy production minimization approach. Finally, we discuss effects of the additional terms in polymer electrolyte membrane fuel cells and in solid oxide fuel cells showing that the new theory gives the same results as the standard theory in the former case while it becomes important in the latter case. (en)
Title	Detailed thermodynamic analysis of fuel cell efficiency Detailed thermodynamic analysis of fuel cell efficiency (en)
skos:prefLabel	Detailed thermodynamic analysis of fuel cell efficiency Detailed thermodynamic analysis of fuel cell efficiency (en)
skos:notation	RIV/49777513:23640/13:43919855!RIV14-MSM-23640___
http://linked.open...avai/predkladatel	Nové technologie - výzkumné centrum
http://linked.open...avai/riv/aktivita	P S
http://linked.open...avai/riv/aktivity	P(ED2.1.00/03.0088), S
http://linked.open...vai/riv/dodaniDat	2014
http://linked.open...aciTvurceVysledku	Pavelka, Michal
http://linked.open.../riv/druhVysledku	D - Článek ve sborníku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Západočeská univerzita v Plzni / Nové technologie - výzkumné centrum
http://linked.open...dnocenehoVysledku	68703
http://linked.open...ai/riv/idVysledku	RIV/49777513:23640/13:43919855
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	entropy production minimization; non-equilibrium thermodynamics; efficiency; fuel cells (en)
http://linked.open.../riv/klicoveSlovo	entropy production minimization non-equilibrium thermodynamics efficiency fuel cells
http://linked.open...ontrolniKodProRIV	[59E87348B682]
http://linked.open...v/mistoKonaniAkce	Brescia, Italy
http://linked.open...i/riv/mistoVydani	Brescia
http://linked.open...i/riv/nazevZdroje	Proceedings of the 12th Joint European Thermodynamics Conference, JETC 2013
http://linked.open...in/vavai/riv/obor	BJ
http://linked.open...ichTvurcuVysledku	1 (xsd:int)
http://linked.open...cetTvurcuVysledku	2 (xsd:int)
http://linked.open...vavai/riv/projekt	Centre of the New Technologies and Materials
http://linked.open...UplatneniVysledku	2013
http://linked.open...iv/tvurceVysledku	Maršík, František Pavelka, Michal
http://linked.open...vavai/riv/typAkce	EUR - Evropská
http://linked.open.../riv/zahajeniAkce	2013-07-01 (xsd:date)
number of pages	6 (xsd:int)
http://purl.org/ne...btex#hasPublisher	Cartolibreria Snoopy
https://schema.org/isbn	978-88-89252-22-2
http://localhost/t...ganizacniJednotka	23640

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