In this work, the effects of inlet air cooling by vapor compression refrigeration cycle and evaporative water-cooling system, the cooling of blade coolant air by fuel before entering the combustor and recuperation on the combined cycle power plant performance have been studied. The present results show substantial improvements in the value of specific work and plant efficiency in the presence of cooling of inlet air and blade coolant air compared to a system without such cooling effects. However, implementation of recuperation alone reduces plant efficiency and specific work but recuperation combined with cooling effects increases plant efficiency. Design engineers might find presented results useful in optimizing a combined cycle system.

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