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dc.contributor.author
Roskosch, Dennis
dc.contributor.author
Bardow, André
dc.date.accessioned
2021-11-11T10:05:52Z
dc.date.available
2021-11-09T14:35:00Z
dc.date.available
2021-11-11T10:05:52Z
dc.date.issued
2021
dc.identifier.uri
http://hdl.handle.net/20.500.11850/514556
dc.description.abstract
The transition to renewable energy sources, such as wind power, photovoltaics, or hydropower, results in a stronger focus on electricity also for heat generation. This focus increases the need for efficient power-to-heat processes, in particular in industry. However, the time-dependent heat demand is often in conflict with the fluctuating electricity supply from renewable sources. This problem can be solved by the integration of thermal energy storage. However, the efficient integration of thermal energy storage and highly efficient power-to-heat processes, such as heat pumps, is still an open question, in particular, for high-temperature applications. This work compares three power-to-heat processes: electrical heater, vapor-compression heat pump, and inverse-Brayton heat pump, and their combination with various storage technologies. The analysis is based on thermodynamic process modeling. Assessment criteria are typical thermodynamic parameters such as exergetic efficiency, but also technological aspects. The technological aspects include technical limits and challenges in the combination of power-to-heat processes and thermal storage. At this, typical challenges stem from realizing an efficient heat transfer from power-to-heat process to storage. Key factors are, e.g., whether additional heat transfers to and from secondary fluids are necessary as well as the number and types of phases of the fluids/materials involved. Our study shows the highest power-to-heat exergetic efficiencies for the vapor-compression heat pump. However, the vapor-compression heat pump is also subject to the most severe limitations that are due to the working fluid. Also, integration with thermal storage is more challenging for vapor-compression heat pumps than for other power-to-heat processes. Combining a vapor-compression heat pump and thermal storage usually requires an additional heat transfer that produces further exergy losses and decreases the power-to-heat-to-storage exergetic efficiency. Thus, the most efficient power-to-heat-to-storage technology is case-specific and can be identified by the presented analysis method based on fundamental thermodynamic and technological aspects.
en_US
dc.language.iso
en
en_US
dc.publisher
Wilhelm und Else Heraeus-Stiftung
en_US
dc.title
Power-to-Heat-to-Storage: A Technology Comparison
en_US
dc.type
Other Conference Item
ethz.book.title
Process Integration, Chemical and Thermal Energy Storage for the Energy Transformation: 743. WE-Heaeus-Seminar. Booklet with Abstracts
en_US
ethz.size
1 p.
en_US
ethz.event
743. WE-Heraeus-Seminar: Process Integration, Chemical and Thermal Energy Storage for the Energy Transformation
en_US
ethz.event.location
Online
en_US
ethz.event.date
March 22-24, 2021
en_US
ethz.notes
Poster abstract. Poster presented on March 22, 2021.
en_US
ethz.publication.place
Hanau
en_US
ethz.publication.status
published
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02130 - Dep. Maschinenbau und Verfahrenstechnik / Dep. of Mechanical and Process Eng.::02668 - Inst. f. Energie- und Verfahrenstechnik / Inst. Energy and Process Engineering::09696 - Bardow, André / Bardow, André
en_US
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02130 - Dep. Maschinenbau und Verfahrenstechnik / Dep. of Mechanical and Process Eng.::02668 - Inst. f. Energie- und Verfahrenstechnik / Inst. Energy and Process Engineering::09696 - Bardow, André / Bardow, André
en_US
ethz.date.deposited
2021-11-09T14:35:14Z
ethz.source
FORM
ethz.eth
yes
en_US
ethz.availability
Metadata only
en_US
ethz.rosetta.installDate
2021-11-11T10:06:01Z
ethz.rosetta.lastUpdated
2021-11-11T10:06:01Z
ethz.rosetta.exportRequired
true
ethz.rosetta.versionExported
true
ethz.COinS
ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.atitle=Power-to-Heat-to-Storage:%20A%20Technology%20Comparison&rft.date=2021&rft.au=Roskosch,%20Dennis&Bardow,%20Andr%C3%A9&rft.genre=unknown&rft.btitle=Process%20Integration,%20Chemical%20and%20Thermal%20Energy%20Storage%20for%20the%20Energy%20Transformation:%20743.%20WE-Heaeus-Seminar.%20Booklet%20with%20Abstracts
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