Publication: Longitudinal supports shape influence on deflection and stresses in solar receiver tubes
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Publication date
2022-09
Defense date
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Publisher
European Association for the Development of Renewable Energy, Environment and Power Quality (EA4EPQ)
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Abstract
Longitudinal supports have a key role in solar
central receivers, preventing tubes from excessive deflection. In
this work, its influence on tube deflection and thermo-mechanical
stresses has been studied. In exiting literature, the longitudinal
supports are not modelled when the behaviour of solar receiver
tubes is studied. In this research, they have been considered
developing numerical models using a finite element analysis
software. To carry out the analysis, a new geometry of the metal
sheet attached to the receiver tubes has been proposed. With this
new shape, different cases have been studied, varying the
separation between supports and their size to study its impact on
stress and deflection in the tubes. Results have shown that
extremely rigid supports may induce additional stress in the
receiver tube. With the geometry considered in this research,
supports do not cause additional mechanical stress in tubes.
Small supports are preferred to bigger ones due to the stresses
arisen in the own support.
Description
Proceeding of: 20th International Conference on Renewable Energies and Power Quality (ICREPQ’22), Vigo (Spain), 27th to 29th July 2022.
Keywords
Solar external receiver, Thermal stress, Deflection, Mechanical model, Longitudinal supports
Bibliographic citation
Renewable Energy and Power Quality Journal (RE&PQJ'20), (2020), v. 20, pp. 204-209.