1 Mechanical Engineering Department, Renewable energy laboratory and sustainable development University of the Brothers Mentouri Constantine, Algeria

2 University Lorraine LEMTA ENSEM - 2 Avenue de la Forèt de Haye BP 90161 54505 Vandoeuvre CEDEX, France


Parabolic trough power plants have been developed on several concepts for production of renewable energy in integrated solar combined cycle system (ISCCS) and direct steam generation (DSG). Each concept has their characteristic due to solar energy configuration. Recently, technology for Solar aided power generation (SAPG) is appeared for optimization of these concepts by solar contribution system in hybrid power plants. The aim of this work is thermodynamic analysis on solar hybrid power plants system for ISCCS and DSG concepts. For these concepts, we evaluated the main differences in solar efficiency to electrical power. The solar aided power generation was proposed for evaluating the solar contribution in DSG concept. The study shows that the share of solar contribution in DSG concept is high, for the best method on thermal solar extraction in the DSG concept. Therefore, the optimum value of solar extraction is to preheat the feed water in the heater.These models were evaluated in this work which is simulated on TRNSYS software and System Advisor Model (SAM). The analysis in performance of hybrid concepts and solar contribution in new DSG concept can be evaluated. It was found the best method is solar contribution in the solar hybrid power plants.


  1. DavidKearney & Associates. Vashon, Washington, National Renewable Energy Laboratory (NREL). Subcontract And Reviewed By Guidelines (April 2009, December 2010).
  2. Syndicat des énergies renouvelables Les fiches d’informations sur l’énergie solaire thermodynamique, Principle of operation of thermodynamic, Accessed on May2010.
  3. Allani Y. CO2 mitigation through the use of hybrid solar-combined cycles. Energy Conversion Management (1997), 38, S661–S7.
  4. Kuenstle, K, Lezuo, A., Reiter, K. Solar powered combined cycle. Proceedings of the Power Gen Europe ’94, Cologne, 1994  17–19May.
  5. Steinmann, W.-D., Eck, M., Direct solar steam generation in parabolic troughs. Proceedings of the 10th Solar PACES International Symposium on Solar Thermal Concentrating Technologies, Sydney 2000., pp. 107–112.
  6. Zhai RR, Yang YP, Zhu Y, et al. The evaluation of solar contribution in solaraided coal-fired power plant. Int J Photoenergy 2013.
  7.  Hou H, Xu Z, Yang Y. An evaluation method of solar contribution in a solar aided power generation (SAPG) system based on exergy analysis. Appl Energy 2016;182:1–8.
  8. Johansson .TB, et al., editors. Renewable Energy, Sources for Fuels and Electricity. Washington, DC: Island Press (1993) , P. 234-5.
  9. Kelly, B., Herrmann, U., Hale, M.J. Optimization Studies for Integrated Solar Combined Cycle Systems. Proceedings Of Solar Forum 2001 - Solar Energy: The Power To Choose, Washington.
  10. Status Report on Solar Trough Power Plants. Sponsored by the German Federal Minister for Education, Science, Research and Technology under Contract No (1996). 0329660.P 40, 56.
  11. Solar Engineering of Thermal Process. Wiliam A.Bickman. John A.Duffie (2013). Simulation in solar process design
  12. McMahan A, Zervos N. Integrating steam generation from concentrating solar thermal collectors to displace duct burner fuel in combined cycle power plants. In: Power-Gen International 2009. Las Vegas.
  13. Montes, M.J. et al. Thermo Fluid Dynamic Model and Comparative Analysis of Parabolic Trough Collectors Using Oil, Water/Steam or Molten Salt as Heat Transfer Fluids. In Proceedings of 14th International Solar PACES Symposium on Solar Thermal Concentrating Technologies, Las Vegas, USA (2008).
  14. Benz, N. et al. Advances in Receiver Technology for Parabolic Troughs. Proceedings of 14th International Solar PACES Symposium on Solar Thermal Concentrating Technologies, Las Vegas, USA (2008)  .
  15. Zarza E., Valenzuela L., et al. Direct Steam Generation in Parabolic Troughs: Final Results and Conclusions of the DISS Project. Energy (2004)  , 29  (5), 635-644.
  16. Krüger D. Krüger J., et al. Kanchanaburi Solar Thermal Power Plant with Direct Steam Generation – Layout. Proceedings of the 16th CSP Solar PACES Symposium, Perpignan, France (2010)..
  17.  Eck M., Benz N., et al. The Potential of Direct Steam Generation in Parabolic Troughs - Results of the German Project DIVA. Proceedings of the 14th Biennial CSP Solar PACES Symposium, Las Vegas, USA (2008).
  18. Price H., Lupfert E., et al. Advances in Parabolic Trough Solar Power Technology. Journal of Solar Energy Engineering, (2002)   124(2), 109-125.
  19. Zarza E.) DISS Phase II Final Report. EU Contract No (2002). JOR3-CT98-0277.
  20. Omar Behara, Abdallah Kellafb, .et al., Instantaneous performance of the first Integrated Solar Combined Cycle System in Algeria. MEDGREEN 2011-LB.Energy Procedia 6 (2011) 185–193.
  21. Eck, M. and Hirsch, T. Dynamics and control of parabolic trough collector loops with direct steam generation, Solar Energy (February 2007), 81(2), 268-279.
  22. Fouad Khaldi, Energy and exergy analysis of the first hybrid solar-gas power plant in Algeria. Proceedings of ECOS 2012 - The 25th International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems June 26-29, 2012, Perugia, Italy.
  23. Shukin S., Annerfeldt al . Siemens SGT-800 industrial gas turbine enhanced to 47MW. Design modifications and operation experience. Power for Land, Sea and Air GT2008; 2008 Jun 9-13; Berlin, Germany. Proceedings of ASME: 65-70.
  24. Steam turbines for solar thermal power plants. Siemens AG(2008). Order No. E50001-W410- A105-V1-4A00. Available at < energy> [accessed 12.6.2011].
  25. O. Behar, A. Khellaf, K .Mohammedi, S .Ait-Kaci a Review of Integrated Solar Combined Cycle System (ISCCS) with a Parabolic Trough Technology, Renewable and Sustainable Energy Reviews .( November 2014), 39, 223–250.
  26. Solar Advisor Model (SAM) software .User guide version 2016.03.14. National Renewable Energy Laboratory.
  27. Trnsys 17. (2010) <>.
  28. Borgnakke C, richard ES. Fundamentals of thermodynamics. United State: John Wiley & Sons, Inc; 2009.
  29. Frier, S.D., Cohen, G.E., Cable, R.G., An overview of the Kramer Junction parabolic trough solar electric system. In: Proceeding of ANZSES 36th Annual Conference Christchurch, New Zealand, (1998)   ,547–554
  30. Montes MJ, Abánades A, Martínez-Val JM. Performance of a direct steam generation solar thermal power plant for electricity production as a function of the solar multiple. Solar Energy (2009) , 83,679–89
  31. Ahmadi GhR, Toghraie D. Parallel feed water heating repowering of a 200 MW steam power plant. J Power Technol 2015;95(4):288–301.
  32. Steinmann, W.-D., Eck, M., Direct solar steam generation in parabolic troughs. Proceedings of the 10th Solar PACES International Symposium on Solar Thermal Concentrating Technologies, Sydney (2000), pp. 107–112.
  33. Kleeman, M., Meliss, M., Regenerative Energiequellen. Springer, Berlin, Heidelberg (1988).
  34. Hou H, Wu J, Yang Y, et al. Performance of a solar aided power plant in fuel saving mode. Appl Energy 2015;160:873–81.
  35. Eric . Hu,YongPing Yang, et al. Solar thermal aided power generation. Applied Energy 87 (2010) .
  36. Yongping Yang a, Qin Yan, et al .An efficient way to use medium-or-low temperature solar heat for power generation e integration into conventional power plant Applied Thermal Engineering 31 (2011) 157-162.
  37. Yuanyuan Li, Yongping Yang .Thermodynamic analysis of a novel integrated solar combined cycle.Applied Energy 122 (2014) 133–142.
  38. Jiyun Qin, Eric Hu⇑, Graham J. Nathan.Impact of the operation of non-displaced feedwater heaters on the performance of Solar Aided Power Generation plants.Energy Conversion and Management 135 (2017) 1–8.