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Application of a single wire-mesh sensor in a parabolic trough facility with direct steam generation

Hoffmann, Alexander and Schleicher, A. (1) and Keller, Lothar and Leon Alonso, Javier and Pitz-Paal, Robert (2018) Application of a single wire-mesh sensor in a parabolic trough facility with direct steam generation. Solar Energy. Elsevier. DOI: https://doi.org/10.1016/j.solener.2017.09.041 ISSN 0038-092X (In Press)

Full text not available from this repository.

Abstract

The direct steam generation process can contribute to increase the cost-effectiveness of line-focused solar thermal power plants. The current research focuses on the once-through mode as very promising option for large-scale commercial plants. However, the existing pool of knowledge about the steam–water flow in the horizontal receiver pipes reveals knowledge gaps. The present contribution aims to experimentally investigate the two-phase flow in the receiver pipes of the DISS test facility at the Plataforma Solar de Almería, Spain, by an invasive measurement device for the first time. Therefore, a conductance wire-mesh sensor is employed in the low-quality evaporation section of the DISS test facility. This measurement device measures the local instantaneous void fraction that is used to describe the prevailing flow pattern under different pressures and mass flow rates. The results show slug flow, roll waves, wavy flow, and stratified-wavy flow in the horizontal receiver pipes within pressures of 30–80 bar. The probability of slug flow or large-amplitude waves decreases with higher pressures. The findings provide a valuable knowledge about the flow structure within the receiver pipes and confirm the proof of function of the wire-mesh sensor under conditions of the direct steam generation process.

Item URL in elib:https://elib.dlr.de/116916/
Document Type:Article
Title:Application of a single wire-mesh sensor in a parabolic trough facility with direct steam generation
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Hoffmann, Alexanderalexander.hoffmann (at) hzdr.deUNSPECIFIED
Schleicher, A. (1)UNSPECIFIEDUNSPECIFIED
Keller, Lotharlothar.keller (at) dlr.deUNSPECIFIED
Leon Alonso, JavierPSA-CIEMATUNSPECIFIED
Pitz-Paal, RobertRobert.Pitz-Paal (at) dlr.dehttps://orcid.org/0000-0002-3542-3391
Date:2018
Journal or Publication Title:Solar Energy
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
DOI :https://doi.org/10.1016/j.solener.2017.09.041
Publisher:Elsevier
ISSN:0038-092X
Status:In Press
Keywords:Wire-mesh sensor; Flow pattern; Experiment; Direct steam generation; Parabolic trough; Two-phase flow
HGF - Research field:Energy
HGF - Program:Renewable Energies
HGF - Program Themes:Concentrating Solar Thermal Technology
DLR - Research area:Energy
DLR - Program:E SW - Solar and Wind Energy
DLR - Research theme (Project):E - Advanced Heat Transfer Media
Location: Köln-Porz
Institutes and Institutions:Institute of Solar Research
Deposited By: Pitz-Paal, Robert
Deposited On:18 Dec 2017 11:44
Last Modified:10 Jan 2019 15:50

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