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Experimental evaluation of the concentrated solar heat flux distribution provided by an 8 m2 Scheffler reflector

Author

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  • Guillet, Gabriel
  • Gaspar, Jonathan
  • Barbosa, Séverine
  • Fasquelle, Thomas
  • Kadoch, Benjamin

Abstract

This study gives experimental results on the intensity and distribution of the concentrated heat flux delivered by an 8m2 Scheffler reflector located in Marseille, France (lon. 5.4° E, lat. 43.3° N). Using thermography and inverse techniques, detailed maps of heat flux densities on a vertical screen were obtained at different times and on different days. The heat flux distributions provided were successfully fitted to a two-dimensional Gaussian model. The model parameters were used to objectively calculate, among other things, the mean major and minor diameters of the ellipse containing 99.7% of the heat flux, i.e. 45cm and 37cm respectively. Maximum heat flux densities ranged between 81kWm−2 and 112kWm−2 and the total heat fluxes delivered by the reflector were between 2.4kW and 3.2kW, which led to energy efficiencies between 61% and 67%. The issue of repeatability of measurements and seasonal/daily variations is also discussed. The results of this study could serve as a basis for the development of realistic numerical models and be useful to engineers responsible for optimising systems incorporating a Scheffler reflector.

Suggested Citation

  • Guillet, Gabriel & Gaspar, Jonathan & Barbosa, Séverine & Fasquelle, Thomas & Kadoch, Benjamin, 2024. "Experimental evaluation of the concentrated solar heat flux distribution provided by an 8 m2 Scheffler reflector," Renewable Energy, Elsevier, vol. 223(C).
    • Handle: RePEc:eee:renene:v:223:y:2024:i:c:s0960148124000235
    DOI: 10.1016/j.renene.2024.119958
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