Dimensionamento e análise de uma usina de concentração solar do tipo Fresnel linear para geração de calor de processo industrial

Abstract

Several industry segments use saturated steam in their industrial processes. The process heat production through traditional steam generators consumes a significant portion of energy that often is done through sources that generate environmental impacts. In this context of energy demand that emerged the solar concentrators and among them, the Linear Fresnel Concentrators Systems, for the purpose of generating electric energy and for generating steam as the final product. However, even the solar concentrating technology having been had significant on several countries, it is almost nonexistent in Brazil, mainly the Fresnel type. Based on this, this undergraduate thesis aimed to size a linear Fresnel type of solar concentrating plant for steam consumption caracteristic of a tipic Microrregião de Pato Branco industry, and to analise the steam production in different conditions of the year for the project sized. To size the project, the direct irradiance for the city of Pato Branco was estimated for all days of the year and analyzed the optical and thermal losses for the solar field on representative days of the year, in addition to the efficiencies that the solar concentration field obtained. It was concluded that the project sized serves as support in the generation of industrial process heat for a conventional steam generator and that it can alone to supply the demand in certain climatic conditions, but not for every day of the year or for all hours of the day. The use of a solar concentrator with Fresnel technology for steam generation has shown promise and the study of its economic viability in the support of steam generation may become interesting for reducing costs in the steam generation, since the sun is a free and inexhaustible source of energy.