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Tommaso Stilo
University of Rome “Tor Vergata”, Italy

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Journal article
Published: 24 August 2020 in International Journal of Hydrogen Energy
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Metal hydrides have become more and more significant both as hydrogen storage devices and as basic elements in energy conversion systems. Besides the well-known rare earth hydrides, magnesium alloys are very promising in the field of thermal energy storage for concentrating solar power plants. There is interest in analysing the performances of such materials in this context; for this purpose, a numerical model to describe hydrogen absorption and desorption processes of a metal hydride has been connected to a model elaborated with the help of Cycle-Tempo software to simulate a CSP plant operation. The integration of this plant with four metal hydride systems, based on the combination of two low-temperature hydrides (LaNi5, LaNi4.8Al0.2) and two high-temperature hydrides (Mg, Mg2Ni) has been studied. The investigation has taken into account CSP overall performances, transfer surfaces and storage efficiencies, to determine the feasibility of designed plants. Results show that the selection of the optimal hydrides must take into account hydride operation temperatures, reaction enthalpies, storage capacities and kinetic compatibility. In the light of the calculated parameters, a solar ORC plant using R134a as the working fluid is a valuable choice if matched to a storage system composed of LaNi5 and Mg2Ni hydrides.

ACS Style

Marco Gambini; Tommaso Stilo; Michela Vellini. Selection of metal hydrides for a thermal energy storage device to support low-temperature concentrating solar power plants. International Journal of Hydrogen Energy 2020, 45, 28404 -28425.

AMA Style

Marco Gambini, Tommaso Stilo, Michela Vellini. Selection of metal hydrides for a thermal energy storage device to support low-temperature concentrating solar power plants. International Journal of Hydrogen Energy. 2020; 45 (53):28404-28425.

Chicago/Turabian Style

Marco Gambini; Tommaso Stilo; Michela Vellini. 2020. "Selection of metal hydrides for a thermal energy storage device to support low-temperature concentrating solar power plants." International Journal of Hydrogen Energy 45, no. 53: 28404-28425.

Journal article
Published: 17 March 2020 in Journal of Cleaner Production
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The combined production of electricity and heat is a promising solution when energy inputs, whether fossil or renewable, are to be minimised and can be also economically rewarding if heat and electricity are produced through high efficiency processes. In this framework, featuring a large thermal and electric demand, the industry sector has seen widespread adoption of cogeneration systems to produce process heat/cool along with electricity. Among the variety of areas to be potentially conveniently matched to cogeneration applications, this study focuses on the food industry based on a collection of data derived from an extensive experimental campaign in a facility specialised in confectionery products and presently served by a combustion engine-based cogeneration unit. In the paper, a comparative analysis is conducted with the help of GateCycle software: CHP technologies based on gas turbine and steam power plant with both condensing and backpressure turbine are considered and properly designed as alternatives. The simulation of the energy flows allows for the estimate of specially defined performance indicators referring to relevant energy, economic and environmental quantities. Results display that, among the possible alternatives, the adoption of a 1.69 MW gas turbine-based cogeneration unit would perform better from an energy, environmental and economic perspective, given the favourable indicators it shows.

ACS Style

Michela Vellini; Marco Gambini; Tommaso Stilo. High-efficiency cogeneration systems for the food industry. Journal of Cleaner Production 2020, 260, 121133 .

AMA Style

Michela Vellini, Marco Gambini, Tommaso Stilo. High-efficiency cogeneration systems for the food industry. Journal of Cleaner Production. 2020; 260 ():121133.

Chicago/Turabian Style

Michela Vellini; Marco Gambini; Tommaso Stilo. 2020. "High-efficiency cogeneration systems for the food industry." Journal of Cleaner Production 260, no. : 121133.

Journal article
Published: 22 January 2019 in Energies
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In January 2011, the introduction of high-efficiency cogeneration in Europe radically modified the incentive scheme for combined heat and power (CHP) plants. Since then, the techno-economic feasibility of new cogeneration plants in different areas of application (industry, service, residential, etc.), along with the definition of their optimal operation, have inevitably undergone a radical change. In particular, with reference to the Italian case and according to the most recent ministerial guidelines following the new EU regulation, in the event that cogeneration power plants do not reach an established value in terms of overall efficiency, their operation has to be split into a CHP and a non-CHP portion with incentives proportional to the energy quantities pertaining to the CHP portion only. In the framework of high-efficiency cogeneration, the present study compares different CHP solutions to be coupled with the paper industry that, among all the industrial processes, appears to be the best suited for cogeneration applications. With reference to this particular industrial reality, energy, environmental, and economic performance parameters have been defined, analysed, and compared with the help of GateCycle software. Among the proposed CHP alternatives, results show that gas turbines are the most appropriate technology for paper industry processes.

ACS Style

Marco Gambini; Michela Vellini; Tommaso Stilo; Michele Manno; Sara Bellocchi. High-Efficiency Cogeneration Systems: The Case of the Paper Industry in Italy. Energies 2019, 12, 335 .

AMA Style

Marco Gambini, Michela Vellini, Tommaso Stilo, Michele Manno, Sara Bellocchi. High-Efficiency Cogeneration Systems: The Case of the Paper Industry in Italy. Energies. 2019; 12 (3):335.

Chicago/Turabian Style

Marco Gambini; Michela Vellini; Tommaso Stilo; Michele Manno; Sara Bellocchi. 2019. "High-Efficiency Cogeneration Systems: The Case of the Paper Industry in Italy." Energies 12, no. 3: 335.