dc.creator | Flores Larsen, Silvana Elinor | |
dc.creator | Altamirano, Martin | |
dc.creator | Hernández, Alejandro Luis | |
dc.date.accessioned | 2018-09-24T14:11:42Z | |
dc.date.accessioned | 2018-11-06T11:56:06Z | |
dc.date.available | 2018-09-24T14:11:42Z | |
dc.date.available | 2018-11-06T11:56:06Z | |
dc.date.created | 2018-09-24T14:11:42Z | |
dc.date.issued | 2012-03 | |
dc.identifier | Flores Larsen, Silvana Elinor; Altamirano, Martin; Hernández, Alejandro Luis; Heat loss of a trapezoidal cavity absorber for a linear Fresnel reflecting solar concentrator; Pergamon-Elsevier Science Ltd; Renewable Energy; 39; 1; 3-2012; 198-206 | |
dc.identifier | 0960-1481 | |
dc.identifier | http://hdl.handle.net/11336/60712 | |
dc.identifier | CONICET Digital | |
dc.identifier | CONICET | |
dc.identifier.uri | http://repositorioslatinoamericanos.uchile.cl/handle/2250/1861221 | |
dc.description.abstract | The present paper studies the heat loss of a linear absorber with a trapezoidal cavity and a set of pipes used for a linear Fresnel reflecting solar concentrator. The study includes the measurements on a 1.4 m long prototype installed in a laboratory, and its thermal simulation in steady-state using EnergyPlus software. Results of the measured vertical temperature variation inside the cavity, the surface interior and exterior wall and window temperatures, the global heat loss at steady-state and the heat loss coefficients, are presented for six different temperatures of the pipes. Measurements revealed a stable thermal gradient in the upper portion of the cavity and a convective zone below it. Around 91% of the heat transferred to outdoors occurs at the bottom transparent window, for a pipe temperature of 200 °C. The heat loss coefficient per area of absorbing pipes ranged from 3.39 W/m2K to 6.35 W/m2K (for 110 °C < Tpipe < 285 °C), and it increased with the increase of Tpipe. Simpler and less time-consuming available free software originally designed for heat transfer in buildings was tested to be a possible replacement of the highly complex CFD software commonly used to simulate the steady-state heat loss of the absorber. The experimental and predicted data sets were found to be in good agreement. © 2011 Elsevier Ltd. | |
dc.language | eng | |
dc.publisher | Pergamon-Elsevier Science Ltd | |
dc.relation | info:eu-repo/semantics/altIdentifier/doi/https://dx.doi.org/10.1016/j.renene.2011.08.003 | |
dc.relation | info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0960148111004460 | |
dc.rights | https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ | |
dc.rights | info:eu-repo/semantics/restrictedAccess | |
dc.subject | FRESNEL | |
dc.subject | LINEAR ABSORBER | |
dc.subject | NUMERICAL SIMULATION | |
dc.subject | SOLAR THERMAL | |
dc.subject | TRAPEZOIDAL CAVITY | |
dc.title | Heat loss of a trapezoidal cavity absorber for a linear Fresnel reflecting solar concentrator | |
dc.type | Artículos de revistas | |
dc.type | Artículos de revistas | |
dc.type | Artículos de revistas | |