Eventos Anais de eventos
ENCIT 2018
Brazilian Congress of Thermal Sciences and Engineering
ANALYSIS OF A SOLAR PARABOLIC DISH STIRLING ENGINE USING BRAZILIAN NORTHEAST SOLARIMETRIC DATA
Submission Author:
Felipe Pinheiro Maia , RN
Co-Authors:
Felipe Pinheiro Maia, Nícolas M. F. T. S. Araújo, Gabriel Ivan Medina Tapia
Presenter: Felipe Pinheiro Maia
doi://10.26678/ABCM.ENCIT2018.CIT18-0810
Abstract
One of the most significant systems that use the sun heat as a source of generating electricity by concentrating the sun heat is the parabolic solar dish. The solar dish tracks the sun direction to focus the heat on the receiver, which drives a Stirling engine-generator unit. This technology has many applications in relatively small capacity applications due to the size and the weight of available Stirling engines and wind loads effects on the dish reflector. In addition to this, among the Brazilian regions, the Northeast presents the greatest potential of solar radiation in the country, result from the semi-arid climate added to the low precipitation and cloud cover. Thus, the objective of this work is to simulate the performance of a solar parabolic dish Stirling engine, Alpha type, using solarimetric data from Natal-RN (Brazilian northeast city), in order to evaluate the feasibility of its implementation. For this, Direct Normal Irradiance (DNI) data were treated to obtain the temperature at the focal point throughout the day, which was used to simulate the engine operation, using Adiabatic analysis. The power and efficiency curves were obtained for one day, which, as expected, followed the curve of DNI. The maximum power and efficiency obtained were, respectively, 129.88 W and 57.8%. The power curve was adjusted and, from the function obtained, the energy generated over a month by the system was obtained, which is equal to 29.04 kWh.
Keywords
Stirling engine, parabolic solar dish, Brazilian northeast, CSP
