<div class="csl-bib-body">
<div class="csl-entry">Flegkas, S. (2015). <i>Simulation of supercritical carbon dioxide cycles for electrothermal energy storage</i> [Diploma Thesis, Technische Universität Wien]. reposiTUm. https://doi.org/10.34726/hss.2015.26962</div>
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dc.identifier.uri
https://doi.org/10.34726/hss.2015.26962
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dc.identifier.uri
http://hdl.handle.net/20.500.12708/4834
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dc.description.abstract
An up to date synopsis of the existing electrothermal energy storage systems is presented in this thesis. The different concepts are structured accordingly to the working fluid and particularly emphasis is laid on systems that utilize transcritical carbon dioxide cycles. Further a brief overview of thermodynamic gas power cycles and the advantages of carbon dioxide as a working fluid are described. Also an introduction to organic Rankine cycles is given and the disadvantages and advantages over steam cycles are compared. Additionally the used thermal energy storage system is presented and the heat transfer between the media sand and carbon dioxide is analysed. A plethora of electrothermal energy storage systems are calculated in the process simulation software IPSEpro. First simulations feature simple Brayton and re-compression cycles, while also the utilization of waste heat and the usage of an isothermal expander during the charge cycle are proposed. Furthermore the integration of a carbon dioxide transcritical organic Rankine cycle to improve the efficiency of the system is examined. Main findings include that the best round trip efficiency is provided by systems with an isothermal expander which are site-independent, while the usage of waste heat also provides high efficiency values but makes the plant site-dependent. It was shown that the limiting factor to achieve an electrothermal energy storage system with high round trip efficiency are the high exergy losses in the thermal energy storage unit.
en
dc.language
English
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dc.language.iso
en
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dc.rights.uri
http://rightsstatements.org/vocab/InC/1.0/
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dc.subject
Thermische Energiespeicherung
de
dc.subject
sCO2
de
dc.subject
Termal Energy Storage
en
dc.subject
sCO2
en
dc.title
Simulation of supercritical carbon dioxide cycles for electrothermal energy storage
en
dc.type
Thesis
en
dc.type
Hochschulschrift
de
dc.rights.license
In Copyright
en
dc.rights.license
Urheberrechtsschutz
de
dc.identifier.doi
10.34726/hss.2015.26962
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dc.contributor.affiliation
TU Wien, Österreich
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dc.rights.holder
Stylianos Flegkas
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tuw.version
vor
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tuw.thesisinformation
Technische Universität Wien
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dc.contributor.assistant
Widhalm, Johannes
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tuw.publication.orgunit
E302 - Institut für Energietechnik und Thermodynamik
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dc.type.qualificationlevel
Diploma
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dc.identifier.libraryid
AC12385397
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dc.description.numberOfPages
69
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dc.identifier.urn
urn:nbn:at:at-ubtuw:1-82503
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dc.thesistype
Diplomarbeit
de
dc.thesistype
Diploma Thesis
en
tuw.author.orcid
0000-0001-7451-9241
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dc.rights.identifier
In Copyright
en
dc.rights.identifier
Urheberrechtsschutz
de
tuw.advisor.staffStatus
staff
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tuw.assistant.staffStatus
staff
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item.fulltext
with Fulltext
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item.cerifentitytype
Publications
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item.mimetype
application/pdf
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item.openairecristype
http://purl.org/coar/resource_type/c_bdcc
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item.languageiso639-1
en
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item.openaccessfulltext
Open Access
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item.openairetype
master thesis
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item.grantfulltext
open
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crisitem.author.dept
E302 - Institut für Energietechnik und Thermodynamik
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crisitem.author.parentorg
E300 - Fakultät für Maschinenwesen und Betriebswissenschaften