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Jülich Solar Power Tower – System Behavior During Downtime

Baumann, Torsten and Göhring, Felix and Stadler, Hannes and Doerbeck, Till (2016) Jülich Solar Power Tower – System Behavior During Downtime. SolarPACES 2016, 11.-14. Okotober 2016, Abu Dhabi, VAE.

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Abstract

At the Jülich Solar Power Tower, two new shut-off dampers have been installed in the hot air piping system in order to reduce thermal losses during downtime of the plant. The thermodynamic behavior of the thermal energy storage and the steam boiler has been investigated with respect to heat losses after shut-down of the plant. Also, the change of temperature and the pressure drop at both shut-off dampers during downtime has been analyzed. Results show that for the storage, a reduction of thermal losses can be achieved by closing the damper overnight. Regarding the steam boiler, no improvements on heat losses were observed. If only two of the four storage chambers have been charged during operation, heat transfer between the chambers is observed after shut-down. It is concluded that natural convection is not the main source of thermal overnight losses, however, it can be lowered thanks to the dampers . Heat conduction and convectional heat transfer at the surfaces also contribute to the decrease of thermal energy, which can be lowered by thicker insulation layers in the future.

Item URL in elib:https://elib.dlr.de/108527/
Document Type:Conference or Workshop Item (Speech)
Title:Jülich Solar Power Tower – System Behavior During Downtime
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Baumann, TorstenTorsten.Baumann (at) dlr.dehttps://orcid.org/0000-0002-6748-4009
Göhring, FelixFelix.Goehring (at) dlr.dehttps://orcid.org/0000-0002-8514-0453
Stadler, HannesHannes.Stadler (at) dlr.deUNSPECIFIED
Doerbeck, Tilldoerbeckt (at) ka-muenchen.deUNSPECIFIED
Date:2016
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:CSP, solar power tower, air, pressure drop, thermal energy storage, steam boiler
Event Title:SolarPACES 2016
Event Location:Abu Dhabi, VAE
Event Type:international Conference
Event Dates:11.-14. Okotober 2016
HGF - Research field:Energy
HGF - Program:Renewable Energies
HGF - Program Themes:Concentrating Solar Thermal Technology
DLR - Research area:Energy
DLR - Program:E SF - Solar research
DLR - Research theme (Project):E - Advanced Heat Transfer Media (old)
Location: Jülich
Institutes and Institutions:Institute of Solar Research > Großanlagen und solare Materialien
Deposited By: Baumann, Dr.Ing. Torsten
Deposited On:01 Dec 2016 19:38
Last Modified:01 Dec 2016 19:38

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