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On the influence of rotation on thermal convection in a rotating cavity for solar receiver applications

Wu, Wei and Amsbeck, Lars and Buck, Reiner and Waibel, Niklas and Langner, Philipp and Pitz-Paal, Robert (2014) On the influence of rotation on thermal convection in a rotating cavity for solar receiver applications. Applied Thermal Engineering, 70 (1), pp. 694-704. DOI: 10.1016/j.applthermaleng.2014.03.059. ISSN 1359-4311.

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Abstract

In order to address the world's high-energy demand, a novel particle receiver concept for concentrating solar power (CSP) plants has been developed. A key feature of the concept is to exploit a receiver rotation being able to adjust the receiver outlet temperature to different load states. Within the scope of identifying the thermal receiver efficiency investigations regarding convection losses of a rotating cavity are conducted. Special attention is paid to the effect of rotation on convective flow in a cylindrical cavity with heated side walls for solar applications. Experiments with a rotating cavity in laboratory scale have clearly revealed a negligible effect of rotation on convective losses in the considered rotation speed range. Compared to the influence of receiver inclination, where the convective losses can be decreased up to 90% for downward-facing receivers, rotation affects them only by at most ±10%. Considering overall thermal losses in the receiver (including conduction and radiation losses), the effect of rotation might be even less than 1% of the incoming solar power.

Document Type:Article
Title:On the influence of rotation on thermal convection in a rotating cavity for solar receiver applications
Authors:
AuthorsInstitution or Email of Authors
Wu, Weiwei.wu@dlr.de
Amsbeck, Larslars.amsbeck@dlr.de
Buck, Reinerreiner.buck@dlr.de
Waibel, Niklasextern
Langner, Philippextern
Pitz-Paal, Robertrobert.pitz-paal@dlr.de
Date:9 May 2014
Journal or Publication Title:Applied Thermal Engineering
Refereed publication:Yes
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:70
DOI:10.1016/j.applthermaleng.2014.03.059
Page Range:pp. 694-704
Series Name:Elsevier Ltd.
ISSN:1359-4311
Status:Published
Keywords:Convection; Rotating cavity; Particle receiver; Concentrating solar power
HGF - Research field:Energy
HGF - Program:Renewable Energies
HGF - Program Themes:Concentrating Solar Systems
DLR - Research area:Energy
DLR - Program:E SF - Solar research
DLR - Research theme (Project):E - Point-Focusing Systems
Location: Stuttgart
Institutes and Institutions:Institute of Solar Research > Punktfokussierende Systeme
Deposited By: Tamara Schmutz
Deposited On:07 Aug 2014 15:54
Last Modified:07 Aug 2014 15:54

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