Papers by Emanuele Fanelli
Energy Procedia, Aug 1, 2018
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Tecnica Italiana, Jun 30, 2020
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Energy Procedia, Aug 1, 2018
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Energy Procedia, Aug 1, 2018
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Applied Energy, Oct 1, 2014
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Modelling, measurement & control, Sep 30, 2018
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Modelling, measurement & control, Sep 30, 2018
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Processes, Oct 21, 2020
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Data in Brief, Jun 1, 2016
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Energy, Nov 1, 2015
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Science of The Total Environment
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In the last two decades, specific interest has been addressed towards Internal Combustion Engines... more In the last two decades, specific interest has been addressed towards Internal Combustion Engines (ICEs) powered by bio-fuels. The growing interest for bio-fuels is related to constantly increasing stringent exhaust gases regulations and to a remarkable request of reduction of CO2- emissions. In the same direction (CO2-emissions reduction) and, additionally with the aim to minimize the dependence from crude oil, several alternative fuels have gained attention in the automotive industry. The fuels of bio-origin can provide a feasible solution to worldwide petroleum crisis by promising a sustainable development, energy conservation and environmental preservation. Gasoline and diesel-driven engines are the major sources of Green- House Gases (GHG) emissions [1-3]. Scientists around the world have been explored several alternative energy sources including biomass derived fuels, biogas, primary alcohol, vegetable oils, biodiesel, etc. These alternative energy sources are largely environmental-friendly but their use needs further investigations in relation to the specific applications. Some of them can be used directly while others need to be formulated to bring their relevant properties closer to those of conventional fuels. This work deals with some features of spark ignition engines powered by syngas. The ENEA GRID Cresco resources have been used to perform accurate simulations using an advanced parallel CFD code.
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E3S Web of Conferences, 2020
Scroll compressors are often used in air conditioning and refrigeration systems thanks to their h... more Scroll compressors are often used in air conditioning and refrigeration systems thanks to their high efficiency, low noise and vibrations, light weight and high reliability. Scrolls are also widely used as positive displacement expanders in small-scale power generation systems, such as Organic Rankine Cycles (ORCs). In recent years, the research has focused on the development of mathematical models that help to predict the scroll expander performances under different operating conditions. In this work, a quasi-dimensional model of a scroll expander of an Organic Rankine Cycle unit is presented. Such an expander consists of two identical circle involute spirals, with appropriate starting segments. Specifically, the model is able to design the scroll expander geometry with either a “circular cutter” or a “perfect mesh profile” (PMP) approach, which are two of the most common scroll geometry starting segments. As regards the thermo-fluid dynamic aspects, specific sub-models have been u...
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Energy Procedia, 2018
Abstract Commercial buildings or shopping malls are characterized by large thermal and electrical... more Abstract Commercial buildings or shopping malls are characterized by large thermal and electrical energy consumptions with high variability of energy demand. Therefore, there is a large interest to explore novel renewable energy generation systems for these applications. A novel flexible configuration of biomass-fired CHP system with organic Rankine cycle (ORC) is here proposed and applied to the case study of food retail buildings in the UK. The proposed configuration adopts a molten salt (MS) circuit to transfer heat from the biomass furnace to the ORC plant. A thermal Energy Storage (TES) is proposed to improve the flexible operation of the plant and reduce the size of the biomass boiler. Molten salts have been preferred to thermal oil as they have no fire risks and low environmental impact and can be used as medium for a Two Tank TES with a “direct heating” scheme. The plant has been analysed using real input data from a biomass boiler installation, conversion efficiency and heat demand from the store. The model is informed by hourly energy costs and electricity feed in tariff in order to define optimal size and operation of the bottoming ORC for the specific case study of large commercial energy end user in the UK. The results show that the use of thermal storage in a biomass-fired ORC plant can improve the boiler efficiency and reduce the biomass consumption in thermal-load following operating mode and increase the investment profitability.
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Data in Brief, 2016
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Applied Energy, 2014
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Bioresource Technology, 2012
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Energy, 2015
This paper provides a multi-objective optimization of a hybrid organic Rankine plant for solar an... more This paper provides a multi-objective optimization of a hybrid organic Rankine plant for solar and low-grade energy sources. In this plant, water, with a mass flow rate of 1 kg/s at a temperature of 90 °C, preheats the working fluid. The objective of this work is to search for solutions with the highest first and second law efficiencies of the plant and the lowest LEC (levelized energy cost). The design parameters are i) the working fluid, ii) the evaporating and condensing pressure, iii) the maximum temperature of the collector thermal fluid and iv) a parameter representative of the temperature profiles in the heat exchangers. A NSGAII (non-dominated sorting genetic algorithm) has been used. The Pareto front solutions provide Cyclopropane, R143a and R32 as working fluids. The lowest LEC (0.114 $/kWh) and the highest first law efficiency (9.65%) are achieved by using Cyclopropane, with a power output greater than 100 kW. The highest second law efficiency (44%) is obtained by employing R143a, with a low contribution of the solar source and a power output greater than 10 kW. Finally, R32 solutions have comparable performance with respect to R143a solutions.
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Papers by Emanuele Fanelli