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Silicone based HTF in parabolic trough applications – from lab to loop

Schaffer, Erich and Hilgert, Christoph and Jung, Christian and Wasserfuhr, Christoph and Leon Alonso, Javier and Valenzuela, Loreto (2018) Silicone based HTF in parabolic trough applications – from lab to loop. SolarPACES Conference, 2.-5. Oktober 2018, Casablanca, Marokko.

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HELISOL® 5A has been subject to continuous research since 2012. This paper presents at selection of the most relevant test and measurement results gained along the parabolic trough collector application related qualification of this new HTF. HELISOL® 5A successfully demonstrated its loop scale functionality achieving the proof of concept at Plataforma Solar de Almería (PSA) after 480 hours of operation at 425 °C. The degradation processes induced formation of low boiling and gaseous products is shown for the aging tests in lab environment and for the loop scale application. In terms of operational safety five key investigations are presented. Three of which include the direct comparison with the commonly used mixture of diphenyl oxide and biphenyl (DPO/BP) the wick flame persistence test, the reaction of HELISOL® 5A and DPO/BP with molten salt and the spray ignition test. The other two tests cover the flammability of HELISOL® 5A in contact with hot (475 °C) surfaces and the worst case scenario of a tube rupture at collector level at 420 °C / 17 bar which both don’t lead to ignition of the HTF.

Item URL in elib:https://elib.dlr.de/122786/
Document Type:Conference or Workshop Item (Speech)
Title:Silicone based HTF in parabolic trough applications – from lab to loop
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Schaffer, ErichWacker Chemie AGUNSPECIFIED
Hilgert, ChristophChristoph.Hilgert (at) dlr.dehttps://orcid.org/0000-0002-9985-7367
Jung, ChristianChristian.Jung (at) dlr.dehttps://orcid.org/0000-0002-5893-4979
Wasserfuhr, ChristophTÜV NordUNSPECIFIED
Date:October 2018
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:No
Keywords:HELISOL® 5A, loop scale demonstration, operational safety, tube rupture simulation
Event Title:SolarPACES Conference
Event Location:Casablanca, Marokko
Event Type:international Conference
Event Dates:2.-5. Oktober 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 - Impact of Desert Environment
Location: Köln-Porz
Institutes and Institutions:Institute of Solar Research > Qualification
Deposited By: Kruschinski, Anja
Deposited On:12 Nov 2018 10:07
Last Modified:14 Feb 2020 14:09

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