Abu Khass, Omar Azzam Sado und Tran, A. Phong und Klöppel, Steffen und Stathopoulos, Panagiotis (2023) Modelling of Two-Phase Water Ejector in Rankine Cycle High Temperature Heat Pumps. In: ASME Turbo Expo 2023: Turbomachinery Technical Conference and Exposition, GT 2023. International Gas Turbine Institute. ASME Turbo Expo 2023: Turbomachinery Technical Conference and Exposition, 2023-06-26 - 2023-06-30, Boston, Massachusetts, USA. doi: 10.1115/GT2023-101245. ISBN 978-0-7918-8698-4.
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Offizielle URL: https://asmedigitalcollection.asme.org/GT/proceedings/GT2023/86984/V005T06A003/1168035?searchresult=1
Kurzfassung
Industrial high temperature heat pumps (HTHPs) can provide carbon-free process heat when operated with renewable energy sources. Using water as the working medium greatly increases the possible range of operation without the detrimental effects of traditional working fluids. One main challenge with this type of heat pump is the high compression ratio required to achieve a given temperature lift. As a result, water based heat pumps need several compression stages. Furthermore, the steam leaving the compressor is highly superheated. Ejectors driven by high pressure condensate allow to de-superheat the steam from the compressor outlet while simultaneously increasing its pressure. Thereby, the required power for compression as well as the number of compression stages can be reduced. This paper studies how the implementation of the two-phase water ejector influences the thermodynamic performance of Rankine cycle HTHP using a thermodynamic model of the ejector. Several cycle architectures are developed to study the ejector integration in the heat pump cycle, including traditional single-stage and multi-stage cycles. The cycles studies are conducted in the Modelica language, in the Modelon Impact environment. The study aims at informing about new developments in two-phase water ejectors and their application potential in Rankine cycle HTHPs. First simulations suggest an efficiency improvement of about 10% through the use of an ejector in the heat pump cycle.
elib-URL des Eintrags: | https://elib.dlr.de/198605/ | ||||||||||||||||||||
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Dokumentart: | Konferenzbeitrag (Vortrag) | ||||||||||||||||||||
Titel: | Modelling of Two-Phase Water Ejector in Rankine Cycle High Temperature Heat Pumps | ||||||||||||||||||||
Autoren: |
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Datum: | 28 September 2023 | ||||||||||||||||||||
Erschienen in: | ASME Turbo Expo 2023: Turbomachinery Technical Conference and Exposition, GT 2023 | ||||||||||||||||||||
Referierte Publikation: | Ja | ||||||||||||||||||||
Open Access: | Ja | ||||||||||||||||||||
Gold Open Access: | Nein | ||||||||||||||||||||
In SCOPUS: | Ja | ||||||||||||||||||||
In ISI Web of Science: | Nein | ||||||||||||||||||||
DOI: | 10.1115/GT2023-101245 | ||||||||||||||||||||
Verlag: | International Gas Turbine Institute | ||||||||||||||||||||
ISBN: | 978-0-7918-8698-4 | ||||||||||||||||||||
Status: | veröffentlicht | ||||||||||||||||||||
Stichwörter: | Ejector, High temperature heat pumps, Rankine cycle heat pump, Industrial process heat, Steam compression | ||||||||||||||||||||
Veranstaltungstitel: | ASME Turbo Expo 2023: Turbomachinery Technical Conference and Exposition | ||||||||||||||||||||
Veranstaltungsort: | Boston, Massachusetts, USA | ||||||||||||||||||||
Veranstaltungsart: | internationale Konferenz | ||||||||||||||||||||
Veranstaltungsbeginn: | 26 Juni 2023 | ||||||||||||||||||||
Veranstaltungsende: | 30 Juni 2023 | ||||||||||||||||||||
Veranstalter : | International Gas Turbine Institute | ||||||||||||||||||||
HGF - Forschungsbereich: | Energie | ||||||||||||||||||||
HGF - Programm: | Energiesystemdesign | ||||||||||||||||||||
HGF - Programmthema: | Digitalisierung und Systemtechnologie | ||||||||||||||||||||
DLR - Schwerpunkt: | Energie | ||||||||||||||||||||
DLR - Forschungsgebiet: | E SY - Energiesystemtechnologie und -analyse | ||||||||||||||||||||
DLR - Teilgebiet (Projekt, Vorhaben): | E - Energiesystemtechnologie | ||||||||||||||||||||
Standort: | Zittau | ||||||||||||||||||||
Institute & Einrichtungen: | Institut für CO2-arme Industrieprozesse > Hochtemperaturwärmepumpen | ||||||||||||||||||||
Hinterlegt von: | Abu Khass, Omar Azzam Sado | ||||||||||||||||||||
Hinterlegt am: | 23 Nov 2023 11:28 | ||||||||||||||||||||
Letzte Änderung: | 24 Apr 2024 20:59 |
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