Eventos Anais de eventos
ENCIT 2016
16th Brazilian Congress of Thermal Sciences and Engineering
HEAT TRANSFER MODELING IN RECEIVER/ABSORBER OF A DISH/STIRLING
Submission Author:
André Leandro de Souza , MG
Co-Authors:
Osvaldo Jose Venturini
Presenter: André Leandro de Souza
doi://10.26678/ABCM.ENCIT2016.CIT2016-0594
Abstract
Brazil, in the same way that the remaining of the world, is undergoing a growing on electricity's demand, mainly due to the technological progress as well as due to the constant seek for improvement of its socio-economic indicators. The increasing energy demand, together with the scarcity of water resources, the reduction in the fossil fuels reserves and the increasing concern with the environment, are challenging the scientific community to develop and/or to improve the usage of Renewable Energy, environmentally-friendly and low cost energy sources, such as the Solar Energy. This is the largest known source of clean energy, which can used in different ways. Some researches describe Brazil as a privileged country, due to its geographical location and its proximity to the equatorial axis of earth, having high solar radiation coverage year-round. This work focuses on the harnessing of Heliothermic Energy, aiming to analyze a Dish-Stirling system, more specifically the receiver/absorbed of this device. A dish-Stirling system consist of a parabolic solar concentrator, which concentrates the solar energy on a receiver that forms the hot part (the absorber) of a Stirling engine. The receiver/absorber is subjected to many thermal losses, which reduce its efficiency, and consequently the whole system performance. The quantification of these losses is one of the objectives of this work. So, an analysis will be performed using data obtained from a mathematical model, developed to quantify these thermal losses, together with experimental data, obtained from experiments conducted in the dish/stirling systems installed in the Solar Energy Laboratory of the UNIFEI - Federal University of Itajubá, located in Itajubá, Minas Gerais.
Keywords
Thermal Losses, mathematical modeling, solar receiver, Solar Energy, Dish/Stirling, Cavity receiver
