Thermal performance characteristics of a tessellated-impinging central receiver

dc.contributor.authorErasmus, Derwalt J.
dc.contributor.authorSanchez-Gonzalez, A.
dc.contributor.authorLubkoll, Matti
dc.contributor.authorCraig, K.J. (Kenneth)
dc.contributor.authorVon Backstrom, Theodor W.
dc.date.accessioned2023-05-11T10:03:44Z
dc.date.available2023-05-11T10:03:44Z
dc.date.issued2023-07
dc.description.abstractCurrent central receiver Concentrating Solar Power plants using molten salt as a heat transfer fluid add heat at around 565 °C in a power plant. Adding heat at a higher temperature can improve the thermodynamic performance and may reduce the cost of power. One way to achieve this is by using pressurized air solar receivers. Current receivers have achieved thermal efficiencies of around 80% at an outlet temperature of 800 °C. This paper investigates a novel central receiver technology that makes use of a tessellated array of heat transfer units. The units employ impingement heat transfer within a concave surface. The receiver can be scaled for a desired thermal rating by the number of heat transfer units. The convolution-projection flux modelling approach is used to model and project an incoming flux distribution on the receiver’s surface. This flux distribution is interpreted by a Computational Fluid Dynamics model as a volumetric heat source. Radiative and convective heat losses are considered. An initial performance outlook estimates that an outlet temperature of 801 °C can be reached at a thermal efficiency of 59% and an exterior surface temperature of 1142 °C for an aperture flux of 635 kW/m2. A limitation is an insufficient exterior surface area to absorb the incoming flux which causes a high surface temperature and thermal losses. Similar thermal performance is estimated at high and low pressures, with increased pumping losses at low pressures. The efficiency may be improved by taking advantage of a larger surface area relative to the aperture area.en_US
dc.description.departmentMechanical and Aeronautical Engineeringen_US
dc.description.librarianhj2023en_US
dc.description.sponsorshipAn Erasmus+ mobility grant awarded by Alliance4Universities which made a collaboration at UC3M possible.en_US
dc.description.urihttp://www.elsevier.com/locate/ateen_US
dc.identifier.citationErasmus, D.J., Sánchez-González, A., Lubkoll, M. et al. 2023, 'Thermal performance characteristics of a tessellated-impinging central receiver', Applied Thermal Engineering, vol. 229, art. 120529, pp. 1-12, doi : 10.1016/j.applthermaleng.2023.120529.en_US
dc.identifier.issn1359-4311 (print)
dc.identifier.issn1873-5606 (online)
dc.identifier.other10.1016/j.applthermaleng.2023.120529
dc.identifier.urihttp://hdl.handle.net/2263/90639
dc.language.isoenen_US
dc.publisherElsevieren_US
dc.rights© 2023 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by- nc-nd/4.0/).en_US
dc.subjectConcentrating solar power (CSP)en_US
dc.subjectCentral receiveren_US
dc.subjectPressurized air receiveren_US
dc.subjectComputational fluid dynamics (CFD)en_US
dc.titleThermal performance characteristics of a tessellated-impinging central receiveren_US
dc.typeArticleen_US

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