Grid Connected CSP-ORC Plants for Residential Application

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In this paper the thermodynamic and electrical optimization of small Concentrated Solar Power plants is presented. The plant is based on an Organic Rankine Cycle working with thermal oil as primary fluid. This study is part of Italian Research project “Thermodynamic Solar Plants in Urban Areas” aimed to develop small scale CSP plants to be installed on buildings roofs in residential areas or on factory sheds, in order to not subtract land to farming. Case studies were performed for capture surfaces of about 100 square meters and electric power output approximately equal to 10 kWe. Through thermodynamic optimizations, results were compared in terms of global electric efficiency with the same electrical power, by varying the working fluid in the power circuit. The solar circuit has been considered composed of parabolic trough concentrators. Electric design has been oriented to grid connected application. Results show that these power target plants have a good chance of spreading in the next decades.
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Organic Rankine Cycle; Concentrated Solar Power; Grid Connection

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