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Solar concentrator optimization against wind effect

  • Sayyed Hossein Mostafavi (Faculty of Engineering and Technology, Shahrekord University) ;
  • Amir Torabi (Faculty of Engineering and Technology, Shahrekord University) ;
  • Behzad Ghasemi (Faculty of Engineering and Technology, Shahrekord University)
  • Received : 2023.01.16
  • Accepted : 2024.01.21
  • Published : 2024.02.25

Abstract

A solar concentrator is a reflective surface in the shape of a parabola that collects solar rays in a focal area. This concentrator follows the path of the sun during the day with the help of a tracking system. One of the most important issues in the design and construction of these reflectors is the force exerted by the wind. This force can sometimes disrupt the stability of the concentrator and overturn the entire system. One of the ways to estimate the force is to use the numerical solution of the air flow in three dimensions around the dish. Ansys Fluent simulation software has been used for modeling several angles of attack between 0 and 180 with respect to the horizon. From the comparison of the velocity vector lines on the dish at angles of 90 to - 90 degrees, it was found that the flow lines are more concentrated inside the dish and there is a tendency for the flow to escape around in the radial direction, which indicates the presence of more pressure distribution inside the dish. It was observed that the pressure on the concave surface was higher than the convex one. Then, the effect of adding a hole with various diameter of 200, 300, 400, 500, and 600 mm on the dish was investigated. By increasing the diameter up to the optimized size of 400 mm, a decrease in the maximum pressure value in the pressure distribution was shown inside the dish. This pressure drop decreased the drag coefficient. The effect of the hole on the dish was also investigated for the 30-degree angled dish, and it was found that the results of the 90-degree case should be considered as the basis of the design.

Keywords

References

  1. Andre, M., Mier-Torrecilla, M. and Wuchner, R. (2015), "Numerical simulation of wind loads on a parabolic trough solar collector using lattice Boltzmann and finite element methods", J. Wind Eng. Ind. Aerod., 146, 185-194. https://doi.org/10.1016/j.jweia.2015.08.010.
  2. Arasu A.V. and Sornakumar T. (2007), "Design, manufacture and testing of fiberglass reinforced parabola trough for parabolic trough solar collectors", Solar Energy, 81(10), 1273-1279. https://doi.org/10.1016/j.solener.2007.01.005
  3. Baniamerian, Z. and Mehdipour, R. (2017), "Studying effects of fence and sheltering on the aerodynamic forces experienced by parabolic trough solar collectors", J. Fluids Eng., 139(3). https://doi.org/10.1115/1.4034951.
  4. Chavez, O.H., Salgado, J.D., Cil, C.O., Escalona, J.J., Cedillo, S.T. and Cuamatzi, R. (2019), "3D CFD wind flow analysis technique applied to a parabolic solar tracker for two extreme weather conditions with experimental results and a controller proposition", J. Renew. Sustain. Energy, 11(2), 023702. https://doi.org/10.1063/1.5054004.
  5. Christo, F.C. (2012), "Numerical modelling of wind and dust patterns around a full-scale paraboloidal solar dish", Renew. Energy, 39(1), 356-366. https://doi.org/10.1016/j.renene.2011.08.038.
  6. Drikakis. D. and Dbouk, T. (2022), "The role of computational science in wind and solar energy: A critical review", Energies, 15(24), 9609. https://doi.org/10.3390/en15249609.
  7. Eswaramoorthy, M. and Shanmugam, S. (2012), "The thermal performance of a low cost solar parabolic dish collector for process heat. Energy Sources", Part A: Recovery. Utilization. Environ. Effects, 34(18), 1731-1736. https://doi.org/10.1080/15567036.2010.490825.
  8. Garcia, M.C., Conzuelo, A.P., Carranza, O.H., Uribe, J.R.D., Nava, U.E.E. and Oliva, V.I.M. (2019), "Testing the surface quality of a reflective parabolic trough solar collector with two flat null-screens", Appl. Optics, 58(4), 752-763. https://doi.org/10.1364/ao.58.000752.
  9. Glynn John, S. and Lakshmanan, T. (2017), "Cost optimization of dish solar concentrators for improved scalability decisions", Renew. Energy, 114, 600-613. https://doi.org/10.1016/j.renene.2017.07.037.
  10. Hachicha, A.A., Rodriguez, I., Castro, J. and Oliva, A. (2013), "Numerical simulation of wind flow around a parabolic trough solar collector", Appl. Energy, 107, 426-437. https://doi.org/10.1016/j.apenergy.2013.02.014
  11. Holmes, J.D., Banks, R.W. and Roberts, G. (1993), "Drag and aerodynamic interference on microwave dish antennas and their supporting towers", J. Wind Eng. Ind. Aerod., 50, 263-269. https://doi.org/10.1016/0167-6105(93)90081-X.
  12. Jaffe, L.D. (1989), "Test results on parabolic dish concentrators for solar thermal power systems", Solar Energy, 42(2), 173-187. https://doi.org/10.1016/0038-092X(89)90144-8.
  13. Lombardi, G. (1991), "Wind-tunnel tests on a model antenna rotating in a cross flow", Eng. Struct., 13(4), 345-350. https://doi.org/10.1016/0141-0296(91)90020-D.
  14. Manikandan, G.K., Iniyan, S. and Goic, R. (2019), "Enhancing the optical and thermal efficiency of a parabolic trough collector-A review", Appl. Energy, 235, 1524-1540. https://doi.org/10.1016/j.apenergy.2018.11.048.
  15. Mannini, C. (2023), "Codes and standards on computational wind engineering for structural design: State of art and recent trends", Wind Struct., 37(2), 133-151. https://doi.org/10.12989/was.2023.37.2.133.
  16. Paetzold, J., Cochard, S., Fletcher, D.F. and Vassallo, A. (2015), "Wind engineering analysis of parabolic trough collectors to optimise wind loads and heat loss", Energy Procedia, 69, 168-177. https://doi.org/10.1016/j.egypro.2015.03.020.
  17. Paitoonsurikarn, S. and Lovegrove, K. (2006), "Effect of paraboloidal dish structure on the wind near a cavity receiver", In Proceedings of the 44th Annual Conference of the Australian and New Zealand Solar Energy Society, Canberra, Australia, September.
  18. Paul1a, R. and Dalui, S.K. (2022), "Aerodynamic shape optimization of a high-rise rectangular building with wings", Wind Struct., 34(3), 259-274. https://doi.org/10.12989/was.2022.34.3.259.
  19. Qianjun, M., Ming, X., Yong, S. and Yuan, Y. (2014), "Study on solar photo-thermal conversion efficiency of a solar parabolic dish system", Environ. Progress Sustain. Energy, 33(4), 1438-1444. https://doi.org/10.1002/ep.11914.
  20. Reddy, K.S., Natarajan, S.K. and Veershetty, G. (2015), "Experimental performance investigation of modified cavity receiver with fuzzy focal solar dish concentrator", Renew. Energy, 74, 148-157. https://doi.org/10.1016/j.renene.2014.07.058.
  21. Reddy, K.S., Veershetty, G. and Vikram, T.S. (2016), "Effect of wind speed and direction on convective heat losses from solar parabolic dish modified cavity receiver", Solar Energy, 131, 183-198. https://doi.org/10.1016/j.solener.2016.02.039.
  22. Sharmaa, D., Palb, S. and Raj, R. (2023), "Numerical prediction of the proximity effects on wind loads of low-rise buildings with cylindrical roofs", Wind Struct., 36(4), 277-292. https://doi.org/10.12989/was.2023.36.4.277.
  23. Uzair, M. (2018), "Wind induced heat losses from solar dish-receiver systems", Doctoral dissertation, Auckland University of Technology, New Zealand.
  24. Uzair, M., Anderson, T. and Nates, R. (2014), "Wind flow around a parabolic dish solar concentrator", In Proceedings of 2014 Asia-Pacific Solar Research Conference, University of New South Wales, Sydney, December.
  25. Uzair, M., Anderson, T., Nates, R. and Jouin, E. (2015), "A validated simulation of wind flow around a parabolic dish". In Proceedings of 2015 Asia-Pacific Solar Research Conference, Australian PV Institute, Brisbane, December.
  26. Wagner, G.L. (1996), "Solar concentrator wind loadings", Master Thesis, Texas Tech University, Texas, USA.
  27. Yan J., Peng Y. and Liu Y., (2023), "Wind load and load-carrying optical performance of a large solar dish/stirling power system with 17.7 m diameter", Energy, 283, 129207, https://doi.org/10.1016/j.energy.2023.129207.
  28. Zemler, M.K., Bohl, G., Rios, O. and Boetcher, S.K. (2013), "Numerical study of wind forces on parabolic solar collectors", Renew. Energy, 60, 498-505. https://doi.org/10.1016/j.renene.2013.05.023.