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dc.contributor.authorArias Montenegro, Francisco Javier
dc.contributor.authorHeras Jiménez, Salvador Augusto de las
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament de Mecànica de Fluids
dc.identifier.citationArias, F.J.; De Las Heras, S.A. Solar thermal panels for small-medium scale air cleaners in major cities. "Journal of solar energy engineering", 1 Març 2019, vol. 141, núm. 6, p. 061006-061006-6.
dc.description.abstractAir quality in major cities is reaching worrisome levels across the planet owing to large-scale industrialization. As a result, air purification systems are becoming a fertile and emerging field for research. Here, consideration is given to the use of a small-medium scale air purification system for cities using a kind of solar thermal panels by inducing local convective currents intended to be used in parks, housing estates, or similar urban places providing a local improvement of the quality of the air. The main difficulty which arose when attempting to use these convective currents is that the upward flow of hot air, which has been cleaned from contaminant particles during its upward travel, must be returned back to the ground. To accomplish this, air must be cooled during the travel in order to obtain an effective buoyancy. Several possible solutions have been proposed in the past, for example, the use of a dedicated cooling system as is the use of water spraying systems which could be an attractive option for large towers. However, for small-medium scale air cleaners, dedicated spraying cooling systems are out of question either because of the requirement of water flow or because of the high local humidity generated which can be uncomfortable for humans. One possible solution could be taking advantage of vertical panels in which a side of the panel is permanently irradiated and the other is permanently in the shadow; in this way, heating and cooling could be performed eliminating the need for specialized cooling systems, and although the effective buoyancy—and then the purified air mass flow—of such a system is considerably reduced, nevertheless, it could still be acceptable for local small-scale applications. Utilizing a simplified physical model, the effective buoyancy and attainable air mass flow were calculated. It is shown that for a small panel of 5 m-height or thereabouts, an air flow per unit of width ~0.4 kg/s is attainable, and for a 10 m-height panel, an air flow per unit of width 0.6 kg/s is attainable. Computational fluid dynamics simulations were performed which agree with the analytical results within ±30 %
dc.subjectÀrees temàtiques de la UPC::Energies::Energia solar tèrmica
dc.subject.lcshSolar thermal energy
dc.subject.lcshAir -- Purification
dc.subject.lcshAir -- Pollution
dc.subject.lcshAir quality
dc.subject.lcshComputational fluid dynamics
dc.subject.lcshAir flow
dc.subject.otherFlow (Dynamics)
dc.subject.otherAir flow
dc.subject.otherSolar energy
dc.subject.otherComputational fluid dynamics
dc.subject.otherAir purification
dc.subject.otherAir pollution control technologies in cities
dc.titleSolar thermal panels for small-medium scale air cleaners in major cities
dc.subject.lemacEnergia tèrmica solar
dc.subject.lemacAire -- Depuració
dc.subject.lemacAire -- Contaminació
dc.subject.lemacAire -- Qualitat
dc.subject.lemacDinàmica de fluids computacional
dc.subject.lemacFlux d'aire
dc.contributor.groupUniversitat Politècnica de Catalunya. SIC - Sistemes Intel·ligents de Control
dc.rights.accessRestricted access - publisher's policy
dc.description.versionPostprint (author's final draft)
upcommons.citation.authorArias, F.J.; De Las Heras, S.A.
upcommons.citation.publicationNameJournal of solar energy engineering

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