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Cobiss

Thermal Science 2016 Volume 20, Issue suppl. 5, Pages: 1237-1249
https://doi.org/10.2298/TSCI16S5237P
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Optical analysis and performance evaluation of a solar parabolic dish concentrator

Pavlović Saša R. ORCID iD icon (Faculty of Mechanical Engineering, Nis)
Vasiljević Darko M. ORCID iD icon (Institute of Physics, Photonics Center, Belgrade)
Stefanović Velimir P. (Faculty of Mechanical Engineering, Nis)
Stamenković Zoran M. ORCID iD icon (Faculty of Mechanical Engineering, Nis)
Bellos Evangelos A. ORCID iD icon (National Technical University of Athens, School of Mechanical Engineering, Zografou, Athens, Greece)

In this study, the optical design of a solar parabolic dish concentrator is presented. The parabolic dish concentrator consists from 11 curvilinear trapezoidal reflective petals made of polymethyl methacrylate with special reflective coating. The dish diameter is equal to 3.8 m and the theoretical focal point distance is 2.26 m. Numerical simulations are made with the commercial software TracePro from Lambda Research, USA, and the final optimum position between absorber and reflector was calculated to 2.075 m; lower than focus distance. This paper presents results for the optimum position and the optimum diameter of the receiver. The decision for selecting these parameters is based on the calculation of the total flux over the flat and corrugated pipe receiver surface; in its central region and in the peripheral region. The simulation results could be useful reference for designing and optimizing of solar parabolic dish concentrators as for as for CFD analysis, heat transfer and fluid flow analysis in corrugated spiral heat absorbers.

Keywords: paraboloid dish concentrator, ray tracing analysis, TracePro software, spiral geometry, scheme macro language

Projekat Ministarstva nauke Republike Srbije, br. III42006: Research and development of energy and environmentally highly effective polygeneration systems based on renewable energy resources i br. III45016: Fabrication and characterization of nanophotonic functional structures in biomedicine and informatics