Showing papers by "Umberto Desideri published in 2017"
TL;DR: In this article, a study about a hybrid solution including a large scale energy storage system coupled with power generation and fast responding energy storage systems is presented, which can deliver the energy previously stored by using an air liquefaction process either with or without the contribution of additional energy from combustion.
108 citations
TL;DR: In this article, a hybrid Pumped Thermal Electricity Storage (PTES) application was studied, which took advantage of a low-grade heat source to boost the electric round-trip efficiency of the system beyond 100%.
76 citations
68 citations
TL;DR: In this article, the authors report design and analysis of an innovative system for the production of green ammonia using electricity from renewable energy sources, which couples Solid Oxide Electrolysis (SOE) for hydrogen, with an improved Haber Bosch Reactor (HBR) for ammonia synthesis.
64 citations
TL;DR: In this paper, a new cycle configuration is introduced, consisting in a new type of organic flash regenerative cycle (OFRC) for heat source temperatures in the range 80-170°C.
58 citations
TL;DR: In this paper, the authors present an overview of power-to-gas technologies by describing the potential, the type of technologies and the challenges that are to be faced in order to introduce them in the energy system of large areas where large shares of renewable energy have been introduced or are planned to be introduced.
47 citations
TL;DR: In this paper, the dynamic behavior of a small low-concentration solar plant with static Compound Parabolic Collectors (CPC) and an ORC power unit with rotary volumetric expander has been analyzed.
35 citations
TL;DR: In this article, an appropriate powertrain architecture based on the utilisation of such storage systems was selected, and components properly sized to increase the overall system efficiency, in order to analyze the different variants and optimize the energy management strategy.
Abstract: Since there is a growing interest worldwide in reducing pollution from sea transport and sea ports activities, one of the biggest issues is to reduce energy consumption and emissions from ground transportation within ports to cranes and other logistic activities. In particular, Rubber Tired Gantry cranes with Diesel engine coupled with electric drive normally brakes the lowering of the container electrically, by dissipating the electric power in resistive loads. This means that energy is consumed to lift the containers and dissipated when it could be recovered, when lowering the load. Thus, one possibility is to recover that energy in a storage system, based on supercapacitors or lithium batteries. This paper starts from experimental measurements conduced on a RTG crane operating in an Italian port. After evaluating real power and energy flows, an appropriate powertrain architecture based on the utilisation of such storage systems was selected, and components properly sized to increase the overall system efficiency. To analyse the different variants and optimize the energy management strategy, a simulation model realised in Modelica language has been used, in order to investigate the cost-effectiveness of the different proposed solutions.
26 citations
TL;DR: Simulation results reveal that the proposed PCH control methodology can be successfully implemented to ensure acceptable system dynamic behavior and is validated with experimental measurements to investigate the significance of the PCH approach for the energy management operation in eco-tractions.
15 citations
14 citations
TL;DR: In this article, an algorithm based on the lock-on mechanism for the maximum power point tracking on the hybrid PV/TEG system was discussed, which proved that the algorithm proved to be effective.
TL;DR: Experimental and Numerical Investigation of a Small-Scale Fixed-Bed Biomass Boiler Stefania Patronelli, Gianluca Caposciutti, Federica Barontini, Chiara Galletti*, Marco Antonelli, Umberto Desideri, Leonardo Tognotti Dipartimento di Ingegneria Civile e Industriale, Università di Pisa, Largo Lucio Lazzarino 2, 56122 Pisa.
Abstract: Experimental and Numerical Investigation of a Small-Scale Fixed-Bed Biomass Boiler Stefania Patronelli, Gianluca Caposciutti, Federica Barontini, Chiara Galletti*, Marco Antonelli, Umberto Desideri, Leonardo Tognotti Dipartimento di Ingegneria Civile e Industriale, Università di Pisa, Largo Lucio Lazzarino 2, 56122 Pisa, Italy. Dipartimento di Ingegneria dell'Energia, dei Sistemi, del Territorio e delle Costruzioni, Università di Pisa, Largo Lucio Lazzarino 2, 56122 Pisa, Italy. chiara.galletti@unipi.it
01 Jan 2017
01 Jun 2017
TL;DR: In this paper, an experimental laboratory activity was also performed, aimed to test some of the components of the auxiliary power unit, i.e. the fuel-cell system, and their interface with the electrical system on-board.
Abstract: Due to the growing interest shown worldwide in reducing pollution in all transportation fields, and also in order to improve comfort by avoiding acoustic emissions inside sea ports or protected areas, shipyards have recently started to develop auxiliary power units fed by hydrogen, for feeding electrical loads on pleasure boats. Different solutions can be considered, with hydrogen stored on-board or, much more interesting, produced on request. This paper analyzes some of these options, by presenting a reforming process starting from liquefied natural gas (LNG) which is more and more considered also as fuel for the main propulsion power unit ones. An experimental laboratory activity was also performed, aimed to test some of the components of the auxiliary power unit, i.e. the fuel-cell system, and their interface with the electrical system on-board.
TL;DR: In this paper, the authors present the advantages of application of integrated sustainable assessment for analyzing different power technologies for mini-grids and highlight the importance of environmental and social aspects and its influence on local community.