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Open AccessArticle

A Distributed Generation Hybrid System for Electric Energy Boosting Fueled with Olive Industry Wastes

Department of Electrical Engineering, Escuela Politécnica Superior, University of Jaén, 23700 Linares, Spain
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Energies 2019, 12(3), 500; https://doi.org/10.3390/en12030500
Received: 31 December 2018 / Revised: 29 January 2019 / Accepted: 31 January 2019 / Published: 5 February 2019
(This article belongs to the Section Bio-Energy)
This paper presents the theoretical model and the simulation of a cutting edge hybrid power system composed of an externally-fired gas turbine (EFGT) coupled with an organic Rankine cycle (ORC) as a bottoming unit for the maximization of electrical power. The power plant is fed with different biomass sources from olive industry wastes (pruning, dry pomace, stones, leaves and twigs), providing more than 550 kW of electric power and a net electrical efficiency of 26.0%. These wastes were burnt directly at atmospheric pressure in an EFGT, producing 400 kW of electric power and exhaust gases at 300 °C. Ten suitable ORC working fluids have been studied to maximize the electric power generation: cyclohexane, isohexane, pentane, isopentane, neopentane, R113, R245fa, R365mfc, R1233zd and methanol. The best fluid was R1233zd, reaching 152.4 kW and 22.1% of ORC thermal efficiency; as drawback, however, R1233zd was not suitable for Combined Heat and Power CHP applications due its lower condensation temperature. Thus, despite R113 gave minor electricity production (137.5 kW) this allowed to generate additional thermal power (506.8 kW) in the way of hot water at 45 °C. View Full-Text
Keywords: biomass; olive oil industry; externally fired gas turbine; organic Rankine cycle; optimization biomass; olive oil industry; externally fired gas turbine; organic Rankine cycle; optimization
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MDPI and ACS Style

Vera, D.; Jurado, F.; de Mena, B.; C. Hernández, J. A Distributed Generation Hybrid System for Electric Energy Boosting Fueled with Olive Industry Wastes. Energies 2019, 12, 500.

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