Effect of solar field aiming strategies on the fatigue life in molten salt external central receivers

Richard Rangel, David Acosta, Jesús García, Marco Sanjuan, Rodrigo Barraza, Habib Zambrano

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

The influence of two operations modes in the solar field of a molten-salt power plant was investigated to evaluate how the receiver pipes' fatigue life changes. Temporal and spatial DNI variation from the WobaS system were integrated with STRAL to obtain the energy flux that heats the working fluid. The temperature distribution over the pipe was obtained by solving a steady-state 3D partial differential equation, validated with a literature model with a 0.1% deviation. The fatigue analysis is based on the elastic behavior assumption. So, the rainflow counting methodology was implemented to consider the irregular sets of equivalent stresses the receiver pipe faced over the transient period. An estimation of the cycles to failure was obtained, and neither operation mode caused fatigue failure before 106 cycles. Still, the controlled aiming point strategy was able to gain an average of 378 MWth over the Solar Two operation mode, where the molten salt would be redirected to the cold tank.

Original languageEnglish
Title of host publicationSolarPACES 2020 - 26th International Conference on Concentrating Solar Power and Chemical Energy Systems
EditorsChristoph Richter, Avi Shultz
PublisherAmerican Institute of Physics Inc.
ISBN (Electronic)9780735441958
DOIs
StatePublished - 12 May 2022
Externally publishedYes
Event26th International Conference on Concentrating Solar Power and Chemical Energy Systems, SolarPACES 2020 - Freiburg, Virtual, Germany
Duration: 28 Sep 20202 Oct 2020

Publication series

NameAIP Conference Proceedings
Volume2445
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

Conference26th International Conference on Concentrating Solar Power and Chemical Energy Systems, SolarPACES 2020
Country/TerritoryGermany
CityFreiburg, Virtual
Period28/09/202/10/20

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