Résumé:
Solar energy in combined cycle power plants are becoming important as an efficient option among conventional thermal power plants. Nowadays, a great amount of combined cycle gas turbine power plants have been installed and some of them have been working for an appreciable period of time. Work with solar energy it is enough to present some notion about solar radiation as well as the methods and mechanism of system integration were studied. Parabolic trough power plants have been developed in the integrated solar combined cycle system (ISCCS) and the direct steam generation (DSG), each concept has their configuration due to solar energy combination .The technology for the Solar Aided Power Generation (SAPG) is appeared for optimizing this combination in solar contribution to cycle efficiency The target of this work is to evaluate the thermodynamic performance on solar hybrid power plants system for ISCCS and DSG concepts in comparison for a solar to electricity efficiency. However the previous studies have only been based on solar contribution for the ISCCS concept. A 150 [MW] ISCCS power plant operational actually in Hassi R’male in south Algeria is selected as the case study compared to DSG concepts technology. Furthermore the Solar Aided Power Generation is proposed in new DSG concept to assuming the solar contribution with evaluation method, for to calculate the generation share of the solar power system in each concept. The study shows that the DSG concept is the best hybrid system to solar-electric efficiency .Further results obtained indicate that solar contribution increase to the DSG concept proposed on TRNSYS software , in the best extraction of solar thermal for to preheat the feed water heater. The economic study shows the performance in these concepts and shows the lower Levelized energy cost (LEC). The performance of the SAPG in new DSG concept, estimate the effect of the solar collector area in each concept for annual solar thermal energy.
