Contaminants met during marine transportation erode air compressor blades of the gas turbine; the result of this process is sein in the decrement of the performance and the increment of fuel need. Also, there is an energy degradation during the operation of the gas turbines, being required an exergy analysis which is able to provide a plan for this power plant performance enhancement. This paper is discussing the benefits brought by nanotechnology when improving the energy efficiency in gas turbines, more specifically applying erosion resistant nanocoatings to compressor air foils is a way to optimize gas turbine performance. Ceramic matrix composites ensure durability of the components under high operating temperatures. Besides the technology dealing with better coats, the exergy analysis assesses the waste of potential energy – also known to be exergy destruction. Exergy destruction has an impact on the efficiency of the plant; moreover each component part of the thermal system has a contribution to the merit of the gas turbine. This is why are formulated exergy destructions for these components. According to the results of this analysis, it can be stated that the least inefficient component of the gas turbine system is the compressor, followed by the gas turbine itself. The object of this study is a 4,1 MW gas turbine with ceramic matrix composites nanocoating, operating at different loads (60%, 80%, 100%).
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