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Parabolic trough receiver heat loss measurement – Correction of absorber temperature over-prediction

Pernpeintner, Johannes and Schiricke, Björn (2019) Parabolic trough receiver heat loss measurement – Correction of absorber temperature over-prediction. In: AIP Conference Proceedings, 2126 (120015), pp. 1-9. SolarPACES Conference 2018, 2.-5. Okt. 2018, Casablanca, Morocco. DOI: 10.1063/1.5117633

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Official URL: https://aip.scitation.org/doi/abs/10.1063/1.5117633

Abstract

Heat loss testing of parabolic trough receivers with heating cartridge is well-established. In that technique temperature is measured by pressing thermocouples against the inside surface of the absorber tube. As the temperature of the thermocouple is influenced by radiation temperature and air temperature in the annulus, the temperature of the thermocouple is higher than the absorber temperature. The paper presents a measurement of absorber temperature overprediction as function of heating power between 89 °C and 577 °C for three different insulation configuration yielding over-prediction between 4.4 K and 15.3 K. This shows, that absorber temperature over-prediction is at a relevant order of magnitude for heat loss measurements of parabolic trough receivers. Interpolation using 2nd- and 3rd-order 2d polynomials with the additional condition of disappearing over-prediction at HL=0 for correction of heat loss measurements is demonstrated.

Item URL in elib:https://elib.dlr.de/129822/
Document Type:Conference or Workshop Item (Speech)
Title:Parabolic trough receiver heat loss measurement – Correction of absorber temperature over-prediction
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Pernpeintner, JohannesJohannes.Pernpeintner (at) dlr.deUNSPECIFIED
Schiricke, BjörnBjoern.Schiricke (at) dlr.dehttps://orcid.org/0000-0003-0572-2048
Date:18 July 2019
Journal or Publication Title:AIP Conference Proceedings
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:No
Volume:2126
DOI :10.1063/1.5117633
Page Range:pp. 1-9
Status:Published
Keywords:parabolic trough receivers, heat loss testing,
Event Title:SolarPACES Conference 2018
Event Location:Casablanca, Morocco
Event Type:international Conference
Event Dates:2.-5. Okt. 2018
Organizer:SolarPACES
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:20 Nov 2019 15:19
Last Modified:20 Nov 2019 15:19

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