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Cavity-shaped direct solar steam generator employing conical helical tube for high-temperature application: Model development, experimental testing and numerical analysis

Kadohiro, Yasuki und Thanda, Vamshi Krishna und Lachmann, Bruno und Risthaus, Kai und Monnerie, Nathalie und Roeb, Martin und Sattler, Christian (2023) Cavity-shaped direct solar steam generator employing conical helical tube for high-temperature application: Model development, experimental testing and numerical analysis. Energy Conversion and Management: X (18). Elsevier. doi: 10.1016/j.ecmx.2023.100366. ISSN 2590-1745.

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Offizielle URL: https://www.sciencedirect.com/science/article/pii/S2590174523000223?via%3Dihub

Kurzfassung

Concentrating solar thermal technologies are drawing more attention since it can substantially contribute to a carbon-neutral society. The solar receivers are essential in this technology to convert solar energy efficiently into thermal energy. Moreover, high-temperature steam generation is the promising application for concentrated solar power plants or industirial processes. Therefore, the direct solar steam generator has been gaining more attention due to its advantages of low operation and maintenance costs. Most solar steam generator designs consist of a tube with helical configuration because of its high heat exchange performance and compactness. However, only few studies address solar steam generators with conical helical tubes. Thus, both experimental and simulation data of this design are scarce. This paper shows the successful development and experimental testing of a solar steam generator with a conical helical tube. The experimental results proved that the developed solar steam generator can produce high-temperature steam of 600 ◦C at an inlet pressure and mass flow rate of 150–200 kPa and 2.5 kg/h, respectively. The overall calculated energy efficiency (thermal and optical efficiency) was 60–62%. In addition, a coupled 1D-3D numerical model was implemented to analyze the solar steam gen- erator’s performance. The model consists of a 3D cavity heat transfer model and a 1D two-phase fluid flow model. The numerical analysis demonstrated the ideal generator’s performance (energy efficiency of 68–69%) and the great impact of convection in the heat losses (50% of the total energy losses). Although more research of the convection is required, the presented results provide a basis for designing further, upscaled solar steam generators employing conical helical tubes.

elib-URL des Eintrags:https://elib.dlr.de/194956/
Dokumentart:Zeitschriftenbeitrag
Titel:Cavity-shaped direct solar steam generator employing conical helical tube for high-temperature application: Model development, experimental testing and numerical analysis
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Kadohiro, YasukiYasuki.Kadohiro (at) dlr.dehttps://orcid.org/0009-0005-1875-0963NICHT SPEZIFIZIERT
Thanda, Vamshi KrishnaVamshi.Thanda (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Lachmann, BrunoBruno.Lachmann (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Risthaus, KaiKai.Risthaus (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Monnerie, NathalieNathalie.Monnerie (at) dlr.dehttps://orcid.org/0000-0002-0220-6665NICHT SPEZIFIZIERT
Roeb, MartinMartin.Roeb (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Sattler, ChristianChristian.Sattler (at) dlr.dehttps://orcid.org/0000-0002-4314-1124NICHT SPEZIFIZIERT
Datum:April 2023
Erschienen in:Energy Conversion and Management: X
Referierte Publikation:Ja
Open Access:Ja
Gold Open Access:Ja
In SCOPUS:Ja
In ISI Web of Science:Ja
DOI:10.1016/j.ecmx.2023.100366
Verlag:Elsevier
ISSN:2590-1745
Status:veröffentlicht
Stichwörter:Direct steam generation, Solar cavity receiver, Conical helical tube, Coupled 1D–3D numerical model
HGF - Forschungsbereich:Energie
HGF - Programm:Materialien und Technologien für die Energiewende
HGF - Programmthema:Chemische Energieträger
DLR - Schwerpunkt:Energie
DLR - Forschungsgebiet:E SW - Solar- und Windenergie
DLR - Teilgebiet (Projekt, Vorhaben):E - Solare Brennstoffe
Standort: Jülich , Köln-Porz
Institute & Einrichtungen:Institut für Future Fuels
Institut für Future Fuels > Bewertung solarer Produktionsverfahren
Hinterlegt von: Bülow, Mark
Hinterlegt am:03 Mai 2023 13:38
Letzte Änderung:19 Okt 2023 10:04

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