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Energies 2015, 8(2), 995-1024; doi:10.3390/en8020995

Thermoeconomic Optimization of a Renewable Polygeneration System Serving a Small Isolated Community

1
Department of Industrial Engineering, University of Naples Federico II, 80125 Naples, Italy
2
Department of Energy, Information Engineering and Mathematical Models, University of Palermo, 90128 Palermo, Italy
These authors contributed equally to this work.
*
Author to whom correspondence should be addressed.
Academic Editor: Josep M. Guerrero
Received: 28 November 2014 / Accepted: 20 January 2015 / Published: 30 January 2015
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Abstract

During the last years, special attention has been paid to renewable polygeneration technologies, able of simultaneously producing thermal, cooling, electrical energy and desalinated water from seawater. This paper focuses on an innovative polygeneration system driven by renewable energy sources, including the following technologies: hybrid photovoltaic/thermal collectors, concentrating parabolic trough (CPVT), a biomass heater, a single-stage absorption chiller and a multiple-effect distillation desalination system. The system is designed to cover the base load of an isolated small community. In previous papers, the dynamic simulation model about plant operation is discussed. In this paper, a detailed exergy, economic and environmental analysis of the plant is presented. In addition, the plant was optimized using different objective functions, applying the Design of Experiment (DoE) methodology which evaluates the sensitivity of the different objective functions with respect to the selected design parameters. The results show that an increase of the storage volume is generally negative, whereas increasing the solar field area involves an increase of the exergy destruction rate, but also an improvement of the CPVT exergy output provided; the final result is an increase of both the exergy efficiency and the economic profitability of the polygeneration system. View Full-Text
Keywords: solar heating and cooling; photovoltaic/thermal collectors (PVT); solar desalination; multiple-effect distillation (MED); exergy analysis; exergoeconomics solar heating and cooling; photovoltaic/thermal collectors (PVT); solar desalination; multiple-effect distillation (MED); exergy analysis; exergoeconomics
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Calise, F.; d'Accadia, M.D.; Piacentino, A.; Vicidomini, M. Thermoeconomic Optimization of a Renewable Polygeneration System Serving a Small Isolated Community. Energies 2015, 8, 995-1024.

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