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Modeling and design guidelines for direct steam generation solar receivers

Lin, Meng and Reinhold, Jan Philipp and Monnerie, Nathalie and Haussener, Sophia (2018) Modeling and design guidelines for direct steam generation solar receivers. Applied Energy, 216, pp. 761-776. Elsevier. DOI: 10.1016/j.apenergy.2018.02.044 ISSN 0306-2619

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Official URL: https://www.sciencedirect.com/science/article/pii/S0306261918301697

Abstract

Concentrated solar energy is an ideal energy source for high-temperature energy conversion processes such as concentrated solar power generation, solar thermochemical fuel production, and solar driven high-temperature electrolysis. Indirectly irradiated solar receiver designs utilizing tubular absorbers enclosed by a cavity are possible candidates for direct steam generation, allowing for design flexibility and high efficiency. We developed a coupled heat and mass transfer model of cavity receivers with tubular absorbers to guide the design of solar-driven direct steam generation. The numerical model consisted of a detailed 1D two-phase flow model of the absorber tubes coupled to a 3D heat transfer model of the cavity receiver. The absorber tube model simulated the flow boiling phenomena inside the tubes by solving 1D continuity, momentum, and energy conservation equations based on a control volume formulation. The Thome-El Hajal flow pattern maps were used to predict liquid-gas distributions in the tubular cross-sections, and heat transfer coefficients and pressure drop along the tubes. The heat transfer coefficient and fluid temperature of the absorber tubes’ inner surfaces were then extrapolated to the circumferential of the tube and used in the 3D cavity receiver model. The 3D steady state model of the cavity receiver coupled radiative, convective, and conductive heat transfer. The complete model was validated with experimental data and used to analyze different receiver types and designs made of different materials and exposed to various operational conditions. The proposed numerical model and the obtained results provide an engineering design tool for cavity receivers with tubular absorbers (in terms of tube shapes, tube diameter, and water-cooled front), support the choice of best-performant operation (in terms of radiative flux, mass flow rate, and pressure), and aid in the choice of the component materials. The model allows for an in-depth understanding of the coupled heat and mass transfer in the solar receiver for direct steam generation and can be exploited to quantify the optimization potential of such solar receivers.

Item URL in elib:https://elib.dlr.de/123170/
Document Type:Article
Title:Modeling and design guidelines for direct steam generation solar receivers
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Lin, MengEPFLUNSPECIFIED
Reinhold, Jan PhilippJan.Reinhold (at) dlr.deUNSPECIFIED
Monnerie, NathalieNathalie.Monnerie (at) dlr.deUNSPECIFIED
Haussener, SophiaEPFLUNSPECIFIED
Date:5 March 2018
Journal or Publication Title:Applied Energy
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:216
DOI :10.1016/j.apenergy.2018.02.044
Page Range:pp. 761-776
Publisher:Elsevier
ISSN:0306-2619
Status:Published
Keywords:Solar energy; Multi-mode heat transfer modeling; Two-phase flow modeling; Solar receiver; Steam generator; Concentrated solar
HGF - Research field:Energy
HGF - Program:Renewable Energies
HGF - Program Themes:Solar Fuels
DLR - Research area:Energy
DLR - Program:E SW - Solar and Wind Energy
DLR - Research theme (Project):E - Solar Fuels
Location: Köln-Porz
Institutes and Institutions:Institute of Solar Research > Solar Chemical Engineering
Deposited By: Sattler, Prof. Dr. Christian
Deposited On:19 Nov 2018 12:59
Last Modified:06 Sep 2019 15:21

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