Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
HELIOSTAT FIELD SIMULATION IN A SOLAR TOWER POWER PLANT
Submission Author:
Gabriel Ivan Medina Tapia , RN
Co-Authors:
Matheus Protasio de Lima, Gabriel Ivan Medina Tapia
Presenter: Matheus Protasio de Lima
doi://10.26678/ABCM.COBEM2017.COB17-1139
Abstract
The Solar tower power plants are one of Concentrating Solar Power (CSP) systems, formed by large heliostat fields, which concentrate the solar Direct Normal Irradiance (DNI) into a receiver located in a tower. The design and characteristics of these mirrors and the tower are directly related to the plant performance. Therefore it is convenient to develop mathematical models to simulate these systems behavior and their possible energy loss mechanisms. In this work a numerical algorithm based on 2D polygon clipping techniques is developed that is valid for heliostats and towers with arbitrary position, orientation and size. In order to show the performance and feasibility of a solar power plant, this program maps the heliostat field and computes blocking, shadowing, according to the sun position. By using the 2D clipping method, the algorithm provides a graphical output of the heliostat reflecting area, enabling the user to follow the losses by blocking and shadowing interactively. In this paper, it is made an analysis for a heliostat located at a latitude 40.08º at 12h and 15h 15min of 21st of January, on which were calculated an efficiency of 0.764 and 0.362, respectively. These results were compared with other theoretical work and presented small discrepancies with them. In this way, the algorithm shows to be feasible for a heliostat field simulation.
Keywords
Concentrating Solar Power, Solar Tower Plant, 2D Clipping
