Prediction and controlling torsional instabilities in photovoltaic solar trackers

Franchini Longhi, Sebastian Nicolas and Ogueta Gutierrez, Mikel and Gómez-Ortega, Omar and Manzanares Bercial, Raúl and López Núñez, Elena and Moralejo, Antonio (2019). Prediction and controlling torsional instabilities in photovoltaic solar trackers. In: "15th International Conference on Wind Engineering", 1-6 sep, Beijing. pp. 1-2.

Description

Title: Prediction and controlling torsional instabilities in photovoltaic solar trackers
Author/s:
  • Franchini Longhi, Sebastian Nicolas
  • Ogueta Gutierrez, Mikel
  • Gómez-Ortega, Omar
  • Manzanares Bercial, Raúl
  • López Núñez, Elena
  • Moralejo, Antonio
Item Type: Presentation at Congress or Conference (Article)
Event Title: 15th International Conference on Wind Engineering
Event Dates: 1-6 sep
Event Location: Beijing
Title of Book: 15th International Conference on Wind Engineering (ICWEI15)
Date: 2019
Subjects:
Freetext Keywords: Solar tracker; Aeroelastic instability; Flutter; DBD Plasma actuator
Faculty: E.T.S. de Ingeniería Aeronáutica y del Espacio (UPM)
Department: Aeronaves y Vehículos Espaciales
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

To reduce the construction and installation costs, the rigidity of the single axis solar tracker structures has been systematically reduced. Consequently, some plants of solar trackers suffer one-degree-of-freedom flutter in torsion, reaching to collapse part of the plant. In this paper, the prediction tools of this phenomenon are analyzed. The estimation of the flutter critical wind velocity from construction standards, CFD and wind tunnel test are compared and evaluated. In addition, some methods to increase the flutter critical wind velocity are presented. Wind tunnel results show that, actually, the instability is a combination between a static increase of the torsional angle (which does not reaches torsional divergence) and one-degree-of-freedom flutter. As this kind of flutter is due to the alternative vortex shedding on both sides of the solar panel, to increase the critical speed, methods based on passive or active flow control (by means of DBD plasma aerodynamic actuators) are studying. It is looking for devices that avoids the alternative vortex shedding, or at least, decreases its intensity.

Funding Projects

TypeCodeAcronymLeaderTitle
Government of SpainENE2016-80107-RUnspecifiedUnspecifiedActuadores aerodinámicos activos para el control de cargas

More information

Item ID: 67217
DC Identifier: https://oa.upm.es/67217/
OAI Identifier: oai:oa.upm.es:67217
Deposited by: Memoria Investigacion
Deposited on: 16 Nov 2021 07:02
Last Modified: 16 Nov 2021 07:02
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