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Using Corrugated Tubes in External Molten Salt Receivers

Uhlig, Ralf and Frantz, Cathy and Buck, Reiner (2019) Using Corrugated Tubes in External Molten Salt Receivers. In: 24th SolarPACES International Conference on Concentrating Solar Power and Chemical Energy Systems, SolarPACES 2018, 2126 (030061), 030061-1. AIP Publishing. SolarPACES 2018, 2018-10-02 - 2018-10-05, Casablanca, Morocco. doi: 10.1063/1.5117573. ISSN 0094-243X.

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Official URL: https://aip.scitation.org/doi/pdf/10.1063/1.5117573?class=pdf&


CFD models have been used to show the potential of using corrugated tubes instead of smooth tubes at a solar thermal receiver using molten salt as heat transfer fluid. The results were compared on the basis of a 700 MWth receiver. Absorber tubes with an inner diameter between 32.8mm and 70 mm using a helical ribbed structure have been analyzed. The results show that a positive effect can only be achieved for configurations where the fluid velocity is lower than for the base hydraulic design with a fully developed turbulent flow. The presented Approach proposes therefore tubes with larger inner diameter and reduced fluid velocity and pressure drop. The difference in pressure drop to the base design can then be used to introduce a swirl flow which leads to better mixing of the fluid and therefore lowers the temperatures of the tube wall, the fluid and also the thermal gradients. Corrugated tubes can be used to add an additional design parameter for a thermo-hydraulic optimization of the receiver.

Item URL in elib:https://elib.dlr.de/124456/
Document Type:Conference or Workshop Item (Speech)
Title:Using Corrugated Tubes in External Molten Salt Receivers
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Date:26 July 2019
Journal or Publication Title:24th SolarPACES International Conference on Concentrating Solar Power and Chemical Energy Systems, SolarPACES 2018
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:No
Page Range:030061-1
Publisher:AIP Publishing
Series Name:AIP Conference Proceedings
Keywords:HPMS; CFD Modelling; thermal receiver
Event Title:SolarPACES 2018
Event Location:Casablanca, Morocco
Event Type:international Conference
Event Start Date:2 October 2018
Event End Date:5 October 2018
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 (old)
Location: Stuttgart
Institutes and Institutions:Institute of Solar Research > Solartowersystems
Deposited By: Uhlig, Tamara
Deposited On:17 Dec 2018 10:19
Last Modified:24 Apr 2024 20:28

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