Eventos Anais de eventos
ENCIT 2018
Brazilian Congress of Thermal Sciences and Engineering
PERFORMANCE CONTROL AND ANALYSIS OF A PARABOLIC SOLAR CONCENTRATOR USED FOR WATER HEATING
Submission Author:
Lino Wagner Castelo Branco Portela , PI , Brazil
Co-Authors:
Lino Wagner Castelo Branco Portela, Erilson Barbosa, Ana Almeida, Ricardo Silva Agostinho
Presenter: Lino Wagner Castelo Branco Portela
doi://10.26678/ABCM.ENCIT2018.CIT18-0822
Abstract
Parabolic solar concentrators are commonly used in solar thermal systems in which the working fluid reaches higher temperatures than can be obtained in flat plate solar collectors. The parabolic solar concentrator (CSP) requires a control system that positions itself properly throughout the day in relation to the sun in order to collect the direct solar radiation and to concentrate it in the tube located in the focus of the parabolic trough. This study aims to present a fluid analysis in a CSP controlled by a microcontrolled electronic system, as well as the analysis of its performance. The control system consists of an Arduino electronic board and sensors of the type LDR (Light Dependent Resistors) that varies its resistance according to the incidence of luminosity in its surface and are responsible for seeking better levels of radiation. As a validation of the operation of the control system, the measurements of temperatures at external points of the wall of the copper tube receiving the concentrated solar radiation are presented; also the inlet and outlet of the water fluid and the measurement of solar radiation.
Keywords
Parabolic Solar Concentrator, Control System, solar radiation, Temperature
