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Assessment of a Falling Solid Particle Receiver with Numerical Simulation

Gobereit, Birgit and Amsbeck, Lars and Buck, Reiner and Pitz-Paal, Robert and Röger, Marc and Müller-Steinhagen, Hans (2015) Assessment of a Falling Solid Particle Receiver with Numerical Simulation. Solar Energy, 2015 (115), pp. 505-517. Elsevier. DOI: 10.1016/j.solener.2015.03.013 ISSN 0038-092X

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Official URL: http://www.sciencedirect.com/science/article/pii/S0038092X15001310#

Abstract

An advanced computational fluid dynamics (CFD) model was developed which allows detailed analysis of a direct absorption falling particle receiver with horizontal aperture (face down) for a solar tower plant. The CFD model includes all relevant effects: movement of the particle curtain and the air, solar radiation, thermal radiation transfer, mechanical and thermal interactions between the particles, the air and the walls and conduction through the walls. These are spatially resolved in three dimensions for the complete receiver including the surrounding air. The coupled equations for thermal radiation, conduction and convective heat transfer are solved iteratively. First results are compared with previous simulations with a simple Matlab model and the differences due to the improvements in the simulations are discussed. The receiver efficiency was determined to be 83% at the design point (400 MW solar input) using a single drop (no recirculation) to heat the particles from 300 °C to 800 °C. In contrast, by separating the circumferential particle curtain into 4 parts and recirculating the particles 3 times through all the sections in series the receiver efficiency increases to more than 92%. This is due to lower reflection losses from the higher particle mass flow and therefore higher opacity of the particle curtain. Wind effects have been studied for the cylindrical face down receiver for the 100% load case with only one recirculation. For 15 m/s horizontal wind speed the receiver efficiency reduces from 89% to 84%.

Item URL in elib:https://elib.dlr.de/96068/
Document Type:Article
Title:Assessment of a Falling Solid Particle Receiver with Numerical Simulation
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Gobereit, BirgitBirgit.Gobereit (at) dlr.dehttps://orcid.org/0000-0002-1952-9209
Amsbeck, Larslars.amsbeck (at) dlr.deUNSPECIFIED
Buck, Reinerreiner.buck (at) dlr.deUNSPECIFIED
Pitz-Paal, Robertrobert.pitz-paal (at) dlr.deUNSPECIFIED
Röger, MarcMarc.Roeger (at) dlr.dehttps://orcid.org/0000-0003-0618-4253
Müller-Steinhagen, HansTechnische Universität Dresden, GermanyUNSPECIFIED
Date:30 March 2015
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
Volume:2015
DOI :10.1016/j.solener.2015.03.013
Page Range:pp. 505-517
Publisher:Elsevier
Series Name:Elsevier Ltd.
ISSN:0038-092X
Status:Published
Keywords:Concentrated solar power (CSP); Solid particle receiver; Direct absorption; Numerical fluid dynamics simulation
HGF - Research field:Energy
HGF - Program:Renewable Energies
HGF - Program Themes:Concentrating Solar Systems (old)
DLR - Research area:Energy
DLR - Program:E SF - Solar research
DLR - Research theme (Project):E - Point-Focusing Systems (old)
Location: Stuttgart
Institutes and Institutions:Institute of Solar Research > Punktfokussierende Systeme
Deposited By: Uhlig, Tamara
Deposited On:25 May 2015 10:37
Last Modified:10 Jan 2019 15:50

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