In this study, energy and exergy analyses are performed for an Organic Rankine Cycle in a local power plant that is located southern of Turkey. The Organic Rankine Cycle was used for low temperature heat source as heat recovery process with various organic working fluids. The examined system consists of an evaporator, a turbine, a condenser, a pump and a generator as components. The evaluation is carried out using two different working fluids for each component of the system. The main purpose

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... this study is to model the ORC cycle for performance optimization in terms of the usage of two different working fluids with relevant temperature ranges. HFE7100 and FC72 working fluids are selected as performance parameters in order to show the effect of the working fluids on the system performance of the Organic Rankine Cycle.