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dc.contributor.authorAmine Hachicha, Ahmed
dc.contributor.authorRodríguez Pérez, Ivette María
dc.contributor.authorOliva Llena, Asensio
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament de Màquines i Motors Tèrmics
dc.identifier.citationAmine Hachicha, A.; Rodriguez, I.; Oliva, A. Wind speed effect on the flow field and heat transfer around a parabolic trough solar collector. "Applied energy", 01 Octubre 2014, vol. 130, p. 200-211.
dc.description.abstractParabolic trough solar collectors are currently one of the most mature and prominent solar technology for the production of electricity. These systems are usually located in an open terrain where strong winds may be found, and could affect their stability and optical performance, as well as the heat exchange between the solar receiver and the ambient air. In this context, a wind flow analysis around a parabolic trough solar collector under real working conditions is performed. A numerical aerodynamic and heat transfer study based on Large Eddy Simulations is carried out to characterise the wind loads and heat transfer coefficients. After the study carried out by the authors in an earlier work (Hachicha et al. 2013) at ReW1=3.9e5, computations are performed at a higher Reynolds number of ReW2=1e6, and for various pitch angles. The effects of wind speed and pitch angle on the averaged and instantaneous flow are assessed. The aerodynamic coefficients are calculated around the solar collector and validated with measurements performed in wind tunnel tests. The variation of the heat transfer coefficient around the heat collector element with the Reynolds number is presented and compared to the circular cylinder in cross-flow. The unsteady flow is studied for three pitch angles: 0 ; 45 and 90 and different structures and recirculation regions are identified. A spectral analysis around the parabola and its receiver is also carried out in order to detect the most relevant frequencies related to the vortex shedding mechanism which affects the stability of the collector.
dc.format.extent12 p.
dc.rightsAttribution-NonCommercial-NoDerivs 3.0 Spain
dc.subjectÀrees temàtiques de la UPC::Energies::Energia solar tèrmica
dc.subject.lcshSolar thermal energy
dc.subject.lcshHeat -- Transmission
dc.subject.lcshFluid dynamics
dc.subject.otherParabolic trough solar collector
dc.subject.otherWind speed effect
dc.subject.otherLarge Eddy Simulations
dc.subject.otherHeat transfer coefficient
dc.subject.otherPTC stability
dc.titleWind speed effect on the flow field and heat transfer around a parabolic trough solar collector
dc.subject.lemacEnergia tèrmica solar
dc.subject.lemacCalor -- Transmissió
dc.subject.lemacDinàmica de fluids
dc.contributor.groupUniversitat Politècnica de Catalunya. CTTC - Centre Tecnològic de la Transferència de Calor
dc.description.peerreviewedPeer Reviewed
dc.rights.accessOpen Access
upcommons.citation.authorAmine Hachicha, A.; Rodriguez, I.; Oliva, A.
upcommons.citation.publicationNameApplied energy

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