International Scientific Journal

Thermal Science - Online First

online first only

Experimental analysis of parabolic trough collector system with multiple receiver geometries and reflective materials

Solar parabolic trough collector systems provide an attractive solution especially for solar thermal power generation. The performance of these systems significantly depends on receiver geometries. Therefore, in the current study, an experimental analysis has been performed using three different receiver geometries along-with two reflective materials. These receiver geometries include: simple tube (reference geometry A), receiver tube with straight absorber plate (geometry B) and receiver tube with curved absorber plate (geometry C); whereas, the reflective materials include: aluminum and Stainless steel. The experimentation was performed under subtropical climate conditions of Taxila, Pakistan. From experimentation, it was identified that peak heat gain obtained from receiver geometries C and B were 71 %, and 30 % higher as compared to the reference geometry A respectively. The, thermal efficiency of the system with geometry A was 20 %, geometry B was 28 % and geometry C was 34 %. Furthermore, two reflective materials i.e. aluminum and Stainless steel were used on geometry C which yielded best results for further PTC performance analysis. It was observed that peak thermal efficiencies were 34.8 % and 31 % with aluminum and stainless steel as reflector materials. The results indicated that aluminum reflector was approx. 12 % efficient as compared to stainless steel reflector. The results will help to cultivate the advantages of innovative receiver geometries and alternative reflective materials.
PAPER REVISED: 2020-07-15
PAPER ACCEPTED: 2020-07-28
  1. Bellos, E., et al., Thermal enhancement of solar parabolic trough collectors by using nanofluids and converging-diverging absorber tube. Renewable Energy, 2016. 94: p. 213-222.
  2. Azam, M., et al., Sun Tracking Solar Panel System. 2016.
  3. Chaudhry, M.A., et al., Renewable energy technologies in Pakistan: prospects and challenges. Renewable and Sustainable Energy Reviews, 2009. 13(6-7): p. 1657-1662.
  4. Adger, W.N., et al., Assessment of Adaptation Practices, Options, Constraints and Capacity. Climate Change, 2007. 200: p. 719-743.
  5. Chaudhry, M.A., et al., Renewable energy technologies in Pakistan: prospects and challenges. Renewable and Sustainable Energy. 2009. 13(6-7): p. 1657-1662.
  6. U.S.N.R.E.L.(NREL). Available from:
  7. Kumaresan, G., et al., Performance Studies of a Solar Parabolic Trough Collector with a Thermal Energy Storage System. Energy, 2012. 47(1): p. 395-402.
  8. Fernández-García, A., et al., Parabolic-Trough Solar Collectors and their Applications. Renewable Sustainable Energy Reviews, 2010. 14(7): p. 1695-1721.
  9. Bellos, E., et al., Daily performance of parabolic trough solar collectors. Solar Energy, 2017. 158: p. 663-678.
  10. Gandhi, A.S., et al., Comparative Study of Geometry of Receiver of Solar Parabolic Trough Concentrator. International Journal of Recent Trends in Engineering & Research 2016. 02(06): p. 398-405.
  11. Han, H.-Z., et al., RST Model for Turbulent Flow and Heat Transfer Mechanism in an Outward Convex Corrugated Tube. Computers Fluids, 2014. 91: p. 107-129.
  12. Daabo, A.M., et al., The Optical Efficiency of Three Different Geometries of a Small Scale Cavity Receiver for Concentrated Solar Applications. Applied Energy, 2016. 179: p. 1081-1096.
  13. Demagh, Y., et al., Numerical Investigation of a Novel Sinusoidal Tube Receiver for Parabolic Trough Technology. Applied Energy, 2018. 218: p. 494-510.
  14. Kumar, A. and S. Shukla, Thermal Performance Analysis of Helical Coil Solar Cavity Receiver Based Parabolic Trough Concentrator. Thermal science, 2018. 00(01): p. 104-104.
  15. Bellos, E. and C.J.E. Tzivanidis, Enhancing the performance of evacuated and non-evacuated parabolic trough collectors using twisted tape inserts, perforated plate inserts and internally finned absorber. Energies. 2018. 11(5): p. 1129.
  16. Jaramillo, O., et al., Parabolic Trough Solar Collector for Low Enthalpy Processes: An Analysis of the Efficiency Enhancement by using Twisted Tape Inserts. Renewable Energy, 2016. 93: p. 125-141.
  17. Huang, Z., et al., Numerical Study on Heat Transfer Enhancement in a Receiver Tube of Parabolic Trough Solar Collector with Dimples, Protrusions and Helical Fins. Energy Procedia, 2015. 69: p. 1306-1316.
  18. Bellos, E., et al., Enhancing the performance of parabolic trough collectors using nanofluids and turbulators. Renewable and Sustainable Energy Reviews, 2018. 91: p. 358-375.
  19. Razmmand, F. and R. Mehdipour, Effects of Different Coatings on Thermal Stress of Solar Parabolic Trough Collector Absorber in Direct Steam Generation Systems. Thermal Science, 2019. 23(2): p. 727-738.
  20. Medina Carril, D.M., et al., Finite Element Analysis of a Solar Collector Plate using Two Plate Geometries. Ingeniería e Investigación, 2016. 36(3): p. 95-101.
  21. Duffie, J.A. and W.A. Beckman, Solar engineering of thermal processes. John Wiley & Sons.. 2013:
  22. Kaczor, Z., et al., Numeraical Studies on Capability to Focus Solar Radiation with Mirrors of Different Curvatures. Thermal Science, 2019. 23: p. 1153-1162.
  23. Sadaghiyani, O.K., et al., Two New Designs of Parabolic Solar Collectors. Thermal Science, 2014. 18(2): p. 323-334.
  24. Bellos, E. and C. Tzivanidis, Enhancing the performance of a parabolic trough collector with combined thermal and optical techniques. Applied Thermal Engineering, 2020. 164: p. 114496.
  25. Arasu, A.V. and S.T. Sornakumar, Performance Characteristics of the Solar Parabolic Trough Collector with Hot Water Generation System. Thermal Science, 2006. 10(2): p. 167-17.
  26. Muthu, G., et al., Solar Parabolic Dish Thermoelectric Generator with Acrylic Cover. Energy Procedia, 2014. 54: p. 2-10.
  27. Macedo-Valencia, J., et al., Design, Construction and Evaluation of Parabolic Trough Collector as Demonstrative Prototype. Energy Procedia, 2014. 57: p. 989-998.
  28. Noman, M., et al., An Investigation of a Solar Cooker with Parabolic Trough Concentrator. Case Studies in Thermal Engineering, 2019. 14: p. 100436. 29] Iqbal, W., et al., Experimental and Theoretical Performance Investigation of Parabolic Trough Collector for Industrial Sector in the Region of Taxila. Technical Journal, 2020. 25(02).
  29. Harrison, P.G., Chemistry of Tin. 1989: Blackie Glasgow.
  30. Tzivanidis, C. and E. Bellos, The use of parabolic trough collectors for solar cooling - A case study for Athens climate. Case Studies in Thermal Engineering, 2016. 8: p. 403-413.
  31. Kalogirou, S.A., Solar thermal collectors and applications. Progress in energy and combustion science, 2004. 30(3): p. 231-295.
  32. Duffie, J.A. and W.A. Beckman, Solar engineering of thermal processes, John Wiley & Sons, fourth editio. 2013,.
  33. Tzivanidis, C., et al., Thermal and optical efficiency investigation of a parabolic trough collector. Case Studies in Thermal Engineering, 2015. 6: p. 226-237.
  34. Cengel, Y.A. and J.M. Cimbala, Fluid mechanics. Tata McGraw-Hill Education.Vol. 1. 2006:
  35. Fernández-García, A., et al., Parabolic-trough solar collectors and their applications. Renewable and Sustainable Energy Reviews, 2010. 14(7): p. 1695-1721.
  36. Noman, M., et al., An investigation of a solar cooker with parabolic trough concentrator. Case Studies in Thermal Engineeering, 2019. 14: p. 100436.