Ingeniería, investigación y tecnología
versão impressa ISSN 1405-7743
BELTRAN-CHACON, R.; VELAZQUEZ-LIMON, N. e SAUCEDA-CARVAJAL, D.. Analysis and Design of a Dish/Stirling System for Solar Electric Generation with a 2.7 kW Air-Cooled Engine. Ing. invest. y tecnol. [online]. 2012, vol.13, n.1, pp.43-53. ISSN 1405-7743.
This paper presents a mathematical modeling, simulation and design of a solar power system of a parabolic dish with an air-cooled Stirling engine of 2.7 kW. The model used for the solar concentrator, the cavity and the Stirling engine were successfully validated against experimental data. Based on a parametric study, the design of the components of the engine is carried out. The study shows that as system capacity increases, the overall efficiency is limited by the power required by the fan, since the design of the cooler needs greater amounts of heat removal by increasing the air flow without affecting the internal conditions of the process (mass flow of working gas and internal dimensions of the same). The system was optimized and achieves an overall efficiency of solar to electric energy conversion of 26.7%. This study shows that the use of an air-cooled Stirling engine is potentially attractive for power generation at low capacities.
Palavras-chave : Stirling engine; solar; model; simulation; design; air cooled.