Thermal performance of combined cycle power plant with solar reheating and regeneration using ecofriendly organic fluids

The use of solar energy in the natural gas combined cycle has been demonstrated in various countries for several years. There are many parameters that governed the cost of combined solar integrated cycles that are initially the reintegration of available running power plants. The main objective of the solar integrated power plant is to mitigate the emission and risk associated with the already running power plants. The other important purpose of the integration of the solar energy system into already running power cycles is to minimize the running cost in the existing equipment. In this paper, thermodynamic (exergy and energy) analysis of Gas turbine-Organic Rankine combined cycle with the solar reheating of organic fluid is done and the results are compared with the combined cycle with the solar reheating, with the simple combined cycle and combined cycle with the regeneration of organic fluids. The thermal performance of the system is compared with different organic fluids like R134a, R227ea, R245fa, R1234ze and R1234yf at different organic Rankine cycle maximum temperature and maximum pressure. It was observed that R1234yf shows the maximum increase in second law efficiency by regeneration around 49.2%. 42.94% using ORC and 48.2%, using ORC with Regeneration and solar Reheat system while R134a shows maximum organic Rankine cycle efficiency of 48.3%. exergetic efficiency of the combined cycle with regeneration and reheating using R1234ze organic fluid. However maximum first law efficiency comes out by using R134a fluid. For practical applications and various problems associated with eco-friendly organic fluids (such as flammability and explosion risk should be considered), R134a can be used as a better option in regeneration combined cycle plant with solar reheating.

This article is published in peer review journal and open access journal, International journal of research in engineering and innovation (IJREI), which have a high impact factor journal for more details regarding this article, please go through our journal website.

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