Efficiency analysis of a solar disk collector with Stirling engine in the city of Armenia, Colombia
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Keywords
Solar energy, Disc collector, Thermal efficiency, Optical efficiency, Stirling engine, Sun tracking
Abstract
This paper presents the study and analysis of the thermal and optical efficiency of a disk collector with a Stirling engine located in the city of Armenia, Colombia, used to produce electrical energy. The implementation of a 65 cm diameter parabolic disk solar concentrator with a small Stirling engine was carried out. Weekly tests were carried out, measuring the reflector temperature, absorber temperature, ambient temperature and solar radiation between 9 am and 3 pm for 5 months. The thermal and optical efficiency and the power generated by the collector were calculated. Likewise, an automatic solar tracking system was developed based on linear actuators controlled by an Arduino board, in order to obtain a higher concentration of incident radiation. The average solar radiation was 626 W/m2 and an average thermal efficiency of 39,6% was obtained, while the optical efficiency was 33%, values compared with disk collectors reported in the literature.
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Carlos Andrés Cárdenas Valencia, University of Quindío, Armenia, Colombia
PhD candidate in Projects. Master in Materials Sciences. Bachelor of Electricity and Electronics. Professor of the Electronic Instrumentation Technology Program at the University of Quindío.
Ramón Pali Casanova, Iberoamerican International University (UNINI), Campeche, Mexico
Doctor in Polymeric Materials, Professor-Researcher (Projects and Industrial Engineering), Universidad Internacional Iberoamericana.