Potencia y eficiencia de un concentrador solar de fresnel de doble reflexión

Abstract

En este trabajo se determina la potencia y eficiencia de un concentrador solar de Fresnel de doble reflexión. Se hizo circular un fluido caloportador por un intercambiador de calor (serpentín) colocado en el volumen focal del concentrador y un recipiente receptor del aceite, para mantener un flujo constante se utilizó una bomba mecánica. En el proceso se midió la radiación solar, las temperaturas de entrada y salida del fluido. La eficiencia promedio del concentrador obtenida es de 16% y la potencia promedio de 335 W.

In this paper the analysis of the thermal behavior of a Fresnel solar concentrator of double reflection is presented, by means of the determination of its power and efficiency. In order to be able to do this, the temperature of the chosen working fluid was measured at the inlet and outlet of a heat exchanger, as well as the solar radiation and the flow rate. This exchanger is located in the focal volume of the concentrator. The "absorber" consists of a rectangular spire, built in aluminum, and coated with matt black paint, resistant to high temperatures. The working fluid (thermal oil) was kept in a closed cycle; In order to maintain a constant flow, and this was driven by an electric oil pump.