Dynamic analysis of the SunDial, the rotatory Fresnel collector

Abstract

The SunDial is a new rotatory Fresnel designed for solar heat industrial process (SHIP) applications. This study aims to carry out a dynamic analysis of the SunDial against different transients such as start-up, defocus, and cloud passage. We used Dymola software to simulate the SunDial connected to a heat exchanger, which represents industrial heat demand, in a closed-loop with several controllers. The system could maintain the demand inlet temperature at a constant value, operating the SunDial at a constant flow despite the variability of the solar resource. The defocus control could manage to limit the temperature to the maximum admitted, preventing overheating.