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Extended Heat Loss and Temperature Analysis of Three Linear Fresnel Receiver Designs

Hofer, A.; Cuevas, F.; Heimsath, A.; Nitz, P.; Platzer, W. J.; Scholl, S.


Heat loss prediction models for parabolic trough receivers do not consider the thermal effect of a secondary mirror. As an extension a Thermal Resistance Model (TRM) has been developed at Fraunhofer ISE for the prediction of the heat loss of three different Linear Fresnel Collector (LFC) receiver configurations. In previous investigations we have found the energy balance of a LFC receiver to be strongly influenced by the amount of solar radiation absorbed by the secondary mirror. This absorption provokes an increase of temperature of the secondary mirror and hence a decrease in the total amount of heat loss of a LFC. The size of this effect depends on the receiver geometry and diverse ambient parameters. Investigated parameters are wind velocity, ambient temperature and Direct Normal Irradiance (DNI). This dependency and its effect on heat loss and secondary mirror temperatures are analyzed for three different LFC receiver configurations. As the radiation absorbed by the secondary mirror is affected by the aperture area of the LFC, studies are performed for small-scale and for large-scale collectors.

Verlagsausgabe §
DOI: 10.5445/IR/1000135979
Veröffentlicht am 29.07.2021
DOI: 10.1016/j.egypro.2015.03.049
Zitationen: 7
Zitationen: 6
Cover der Publikation
Zugehörige Institution(en) am KIT Universität Karlsruhe (TH) – Interfakultative Einrichtungen (Interfakultative Einrichtungen)
Karlsruhe School of Optics & Photonics (KSOP)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 05.2015
Sprache Englisch
Identifikator ISSN: 1876-6102
KITopen-ID: 1000135979
Erschienen in Energy procedia
Verlag Elsevier
Band 69
Seiten 424–433
Schlagwörter Linear Fresnel Receiver; Heat Loss; Secondary Mirror Temperatures; Ambient Parameter Study
Nachgewiesen in Scopus
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