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Today one of the most interesting ways to produce biodiesel is based on the use of oleaginous microorganisms, which can accumulate microbial oil with a composition similar to vegetable oils. In this paper, we present a thermo-chemical numerical model of the yeast biodiesel production process, considering cardoon stalks as raw material. The simulation is performed subdividing the process into the following sections: steam explosion pre-treatment, enzymatic hydrolysis, lipid production, lipid extraction, and alkali-catalyzed transesterification. Numerical results show that 406.4 t of biodiesel can be produced starting from 10,000 t of lignocellulosic biomass. An economic analysis indicates a biodiesel production cost of 12.8 USD/kg, thus suggesting the need to increase the capacity plant and the lipid yield to make the project economically attractive. In this regard, a sensitivity analysis is also performed considering an ideal lipid yield of 22% and 100,000 t of lignocellulosic biomass. The biodiesel production costs related to these new scenarios are 7.88 and 5.91 USD/kg, respectively. The large capacity plant combined with a great lipid yield in the fermentation stage shows a biodiesel production cost of 3.63 USD/kg making the product competitive on the current market of biofuels by microbial oil.
Marco Castellini; Stefano Ubertini; Diego Barletta; Ilaria Baffo; Pietro Buzzini; Marco Barbanera. Techno-Economic Analysis of Biodiesel Production from Microbial Oil Using Cardoon Stalks as Carbon Source. Energies 2021, 14, 1473 .
AMA StyleMarco Castellini, Stefano Ubertini, Diego Barletta, Ilaria Baffo, Pietro Buzzini, Marco Barbanera. Techno-Economic Analysis of Biodiesel Production from Microbial Oil Using Cardoon Stalks as Carbon Source. Energies. 2021; 14 (5):1473.
Chicago/Turabian StyleMarco Castellini; Stefano Ubertini; Diego Barletta; Ilaria Baffo; Pietro Buzzini; Marco Barbanera. 2021. "Techno-Economic Analysis of Biodiesel Production from Microbial Oil Using Cardoon Stalks as Carbon Source." Energies 14, no. 5: 1473.
The need for effective and reliable damage detection and localization systems is growing in several engineering fields, in particular in water impact problems characterized by impulsive loading conditions, high amplitude vibrations and large local deformations. In this paper, we further develop the approach presented in previous works to detect damage of water-impacting structures. Specifically, we provide a set of experimental tests on a flexible plastic cylinder impacting the water after a 50 cm free fall. The cylindrical specimen is artificially damaged in a known position. Strain measurements are performed through a set of nine fiber Bragg gratings distributed along the circumference of a cylinder section. We show that strain sensors can be used as reference sensors, for structure displacements reconstruction, and control sensors, for damage detection purposes, and the computation of the difference between measured and expected deformation may allow damage detection. Moreover, we investigate how exchanging control and reference sensors in the same sensor arrangement affect damage detection and localization.
Alessandro Mercuri; Pierluigi Fanelli; Stefano Ubertini; Giacomo Falcucci; Elio Jannelli; Chiara Biscarini. Effect of Strain Measurement Layout on Damage Detection and Localization in a Free Falling Compliant Cylinder Impacting a Water Surface. Fluids 2021, 6, 58 .
AMA StyleAlessandro Mercuri, Pierluigi Fanelli, Stefano Ubertini, Giacomo Falcucci, Elio Jannelli, Chiara Biscarini. Effect of Strain Measurement Layout on Damage Detection and Localization in a Free Falling Compliant Cylinder Impacting a Water Surface. Fluids. 2021; 6 (2):58.
Chicago/Turabian StyleAlessandro Mercuri; Pierluigi Fanelli; Stefano Ubertini; Giacomo Falcucci; Elio Jannelli; Chiara Biscarini. 2021. "Effect of Strain Measurement Layout on Damage Detection and Localization in a Free Falling Compliant Cylinder Impacting a Water Surface." Fluids 6, no. 2: 58.
Miriam Benedetti; Francesca Bonfà; Ilaria Bertini; Vito Introna; Simone Salvatori; Stefano Ubertini; Rosanna Paradiso. Maturity-based approach for the improvement of energy efficiency in industrial compressed air production and use systems. Energy 2019, 186, 1 .
AMA StyleMiriam Benedetti, Francesca Bonfà, Ilaria Bertini, Vito Introna, Simone Salvatori, Stefano Ubertini, Rosanna Paradiso. Maturity-based approach for the improvement of energy efficiency in industrial compressed air production and use systems. Energy. 2019; 186 ():1.
Chicago/Turabian StyleMiriam Benedetti; Francesca Bonfà; Ilaria Bertini; Vito Introna; Simone Salvatori; Stefano Ubertini; Rosanna Paradiso. 2019. "Maturity-based approach for the improvement of energy efficiency in industrial compressed air production and use systems." Energy 186, no. : 1.
The optimal design of distributed generation systems is of foremost importance to reduce fossil fuel consumption and mitigate the environmental impact of human activities in urban areas. Moreover, an efficient and integrated control strategy is needed for each of the components of a distributed generation plant, in order to reach the expected economic and environmental performances. In this paper, the transition from natural gas to electricity-based heating is evaluated for residential applications, considering the interplay between photovoltaic electricity produced on site and the thermal energy storage, to grant the optimal management of heating devices. The energy demand of an apartment building, under different climatic conditions, is taken as a reference and four power plant solutions are assessed in terms of energy cost and pollution reduction potential, compared to a baseline plant configuration. The performance of each power plant is analyzed assuming an optimized control strategy, which is determined through a graph-based methodology that was previously developed and validated by the authors. Outcomes from our study show that, if heat pumps are used instead of natural gas boilers, energy costs are reduced up to 41%, while CO2CO2 emissions are reduced up to 73%, depending on the climatic conditions. Our results provide a sound basis for considering the larger penetration of photovoltaic plants as an effective solution towards cleaner and more efficient heating technologies for civil applications. The simultaneous utilization of heat pumps (as substitutes of boilers) and photovoltaic panels yields a positive synergy that nullifies the local pollution, drastically cuts the CO2CO2 emission, and guarantees the economical sustainability of the investment in renewable energy sources without subsidiary mechanisms.
Andrea L. Facci; Vesselin K. Krastev; Giacomo Falcucci; Stefano Ubertini. Smart integration of photovoltaic production, heat pump and thermal energy storage in residential applications. Solar Energy 2019, 192, 133 -143.
AMA StyleAndrea L. Facci, Vesselin K. Krastev, Giacomo Falcucci, Stefano Ubertini. Smart integration of photovoltaic production, heat pump and thermal energy storage in residential applications. Solar Energy. 2019; 192 ():133-143.
Chicago/Turabian StyleAndrea L. Facci; Vesselin K. Krastev; Giacomo Falcucci; Stefano Ubertini. 2019. "Smart integration of photovoltaic production, heat pump and thermal energy storage in residential applications." Solar Energy 192, no. : 133-143.
Most manufacturing and process industries require compressed air to such an extent that in Europe, for instance, about 10% of the total electrical energy consumption of industries is due to compressed air systems (CAS). However, energy efficiency in compressed air production and handling is often ignored or underestimated, mainly because of the lack of awareness about its energy consumption, caused by the absence of proper measurements on CAS in most industrial plants. Therefore, any effective energy saving intervention on generation, distribution and transformation of compressed air requires proper energy information management. In this paper we demonstrate the importance of monitoring and controlling energy performance in compressed air generation and use, to enable energy saving practices, to enhance the outcomes of energy management projects, and to obtain additional benefits for non-energy-related activities, such as operations, maintenance management and energy accounting. In particular, we propose a novel methodology based on measured data, and baseline definition through statistical modelling and control charts. The proposed methodology is tested on a real compressed air system of a pharmaceutical manufacturing plant in order to verify its effectiveness and applicability.
Miriam Benedetti; Francesca Bonfà; Vito Introna; Annalisa Santolamazza; Stefano Ubertini. Real Time Energy Performance Control for Industrial Compressed Air Systems: Methodology and Applications †. Energies 2019, 12, 3935 .
AMA StyleMiriam Benedetti, Francesca Bonfà, Vito Introna, Annalisa Santolamazza, Stefano Ubertini. Real Time Energy Performance Control for Industrial Compressed Air Systems: Methodology and Applications †. Energies. 2019; 12 (20):3935.
Chicago/Turabian StyleMiriam Benedetti; Francesca Bonfà; Vito Introna; Annalisa Santolamazza; Stefano Ubertini. 2019. "Real Time Energy Performance Control for Industrial Compressed Air Systems: Methodology and Applications †." Energies 12, no. 20: 3935.
In this paper we present a computational model for the fluid structure interaction of a buoyant rigid body immersed in a free surface flow. The presence of a free surface and its interaction with buoyant bodies make the problem very challenging. In fact, with light (compared to the fluid) or very flexible structures, fluid forces generate large displacements or accelerations of the solid and this enhances the artificial added mass effect. Such a problem is relevant in particular in naval and ocean engineering and for wave energy harvesting, where a correct prediction of the hydrodynamic loading exerted by the fluid on buoyant structures is crucial. To this aim, we develop and validate a tightly coupled algorithm that is able to deal with large structural displacement and impulsive acceleration typical, for instance, of water entry problems. The free surface flow is modeled through the volume of fluid model, the finite volume method is utilized is to discretize the flow and solid motion is described by the Newton-Euler equations. Fluid structure interaction is modeled through a Dirichlet-Newmann partitioned approach and tight coupling is achieved by utilizing a fixed-point iterative procedure. As most experimental data available in literature are limited to the first instants after the water impact, for larger hydrodynamic forces, we specifically designed a set of dedicated experiments on the water impact of a buoyant cylinder, to validate the proposed methodology in a more general framework. Finally, to demonstrate that the proposed numerical model could be used for a wide range of engineering problems related to FSI in multiphase flows, we tested the proposed numerical model for the simulation of a floating body.
Andrea Luigi Facci; Giacomo Falcucci; Antonio Agresta; Chiara Biscarini; Elio Jannelli; Stefano Ubertini. Fluid Structure Interaction of Buoyant Bodies with Free Surface Flows: Computational Modelling and Experimental Validation. Water 2019, 11, 1048 .
AMA StyleAndrea Luigi Facci, Giacomo Falcucci, Antonio Agresta, Chiara Biscarini, Elio Jannelli, Stefano Ubertini. Fluid Structure Interaction of Buoyant Bodies with Free Surface Flows: Computational Modelling and Experimental Validation. Water. 2019; 11 (5):1048.
Chicago/Turabian StyleAndrea Luigi Facci; Giacomo Falcucci; Antonio Agresta; Chiara Biscarini; Elio Jannelli; Stefano Ubertini. 2019. "Fluid Structure Interaction of Buoyant Bodies with Free Surface Flows: Computational Modelling and Experimental Validation." Water 11, no. 5: 1048.
Fuel cell based trigeneration plants, that utilize absorption chillers to convert waste heat into cooling energy, are a promising technology to satisfy heat, power, and cooling demand in warm climates. Polymer electrolyte membrane fuel cells, that operate at low temperature (<100°C), are the most technologically mature among the several types of fuel cells. Thermally activated cooling technologies are widely utilized in trigeneration plants to improve their efficiency. However, absorption chillers require relatively high grade thermal energy and their coupling with low temperature fuel cells is relatively untapped. Herein, we perform a techno-economic analysis of a trigeneration plant based on low temperature polymer electrolyte membrane fuel cells and half-effect absorption chillers. A thermo-chemical model is developed to estimate the performance of a cogeneration plant based on low temperature fuel cells and of the half-effect absorption chiller. The behavior of such combined heat, cooling, and power plant is also analyzed within real energy management scenarios, considering different energy demands, climatic conditions, energy costs, and plant layouts. The control strategy of the power plant is optimized through a graph-based methodology previously developed and validated by the authors. Total energy cost and CO2 emissions are then compared to those of a reference scenario where electricity is acquired from the distribution grid, thermal energy is produced through a natural gas boiler, and a mechanical chiller is used for cooling. The results show that the utilization of half-effect absorption chillers boosts the environmental and economic benefits for all the considered scenarios. We also demonstrate that the utilization of the absorption chiller reduces the imbalance between the results obtained for the different scenarios (i.e. climates), although economic and environmental benefits associated to distributed generation are strongly influenced by the energy context.
Gabriele Loreti; Andrea L. Facci; Ilaria Baffo; Stefano Ubertini. Combined heat, cooling, and power systems based on half effect absorption chillers and polymer electrolyte membrane fuel cells. Applied Energy 2018, 235, 747 -760.
AMA StyleGabriele Loreti, Andrea L. Facci, Ilaria Baffo, Stefano Ubertini. Combined heat, cooling, and power systems based on half effect absorption chillers and polymer electrolyte membrane fuel cells. Applied Energy. 2018; 235 ():747-760.
Chicago/Turabian StyleGabriele Loreti; Andrea L. Facci; Ilaria Baffo; Stefano Ubertini. 2018. "Combined heat, cooling, and power systems based on half effect absorption chillers and polymer electrolyte membrane fuel cells." Applied Energy 235, no. : 747-760.
Cogeneration power plants based on fuel cells are a promising technology to produce electric and thermal energy with reduced costs and environmental impact. The most mature fuel cell technology for this kind of applications are polymer electrolyte membrane fuel cells, which require high-purity hydrogen. The most common and least expensive way to produce hydrogen within today's energy infrastructure is steam reforming of natural gas. Such a process produces a syngas rich in hydrogen that has to be purified to be properly used in low temperature fuel cells. However, the hydrogen production and purification processes strongly affect the performance, the cost, and the complexity of the energy system. Purification is usually performed through pressure swing adsorption, which is a semi-batch process that increases the plant complexity and incorporates a substantial efficiency penalty. A promising alternative option for hydrogen purification is the use of selective metal membranes that can be integrated in the reactors of the fuel processing plant. Such a membrane separation may improve the thermo-chemical performance of the energy system, while reducing the power plant complexity, and potentially its cost. Herein, we perform a technical analysis, through thermo-chemical models, to evaluate the integration of Pd-based H2-selective membranes in different sections of the fuel processing plant: (i) steam reforming reactor, (ii) water gas shift reactor, (iii) at the outlet of the fuel processor as a separator device. The results show that a drastic fuel processing plant simplification is achievable by integrating the Pd-membranes in the water gas shift and reforming reactors. Moreover, the natural gas reforming membrane reactor yields significant efficiency improvements.
Gabriele Loreti; Andrea Luigi Facci; Thijs Peters; Stefano Ubertini. Numerical modeling of an automotive derivative polymer electrolyte membrane fuel cell cogeneration system with selective membranes. International Journal of Hydrogen Energy 2018, 44, 4508 -4523.
AMA StyleGabriele Loreti, Andrea Luigi Facci, Thijs Peters, Stefano Ubertini. Numerical modeling of an automotive derivative polymer electrolyte membrane fuel cell cogeneration system with selective membranes. International Journal of Hydrogen Energy. 2018; 44 (9):4508-4523.
Chicago/Turabian StyleGabriele Loreti; Andrea Luigi Facci; Thijs Peters; Stefano Ubertini. 2018. "Numerical modeling of an automotive derivative polymer electrolyte membrane fuel cell cogeneration system with selective membranes." International Journal of Hydrogen Energy 44, no. 9: 4508-4523.
Industrial systems management is nowadays increasingly devoted to improve the control of most critical production aspects. In this context, the performance of all the systems involved in production processes have to be measured and analysed in order to get better insights in terms of potential production and quality improvements as well as energy savings. In order to evaluate the performance of a certain system, a possible and effective way is to compare it with data from similar systems, thus to conduct a benchmark analysis. In the area of energy management, although the compressed air system (CAS) is one of the most important and energy consuming services within industrial plants, enterprises often have difficulties understanding and appreciating the entity of potential benefits coming from the improvement of its energy efficiency. The present paper aims at developing a new benchmark analysis for compressed air systems in industrial plants. The proposed methodology starts from the KPIs (Key Performance Indicators) already available in the scientific literature for CASs’ energy performance and is mainly based on the analysis of a huge real dataset collected from over 15,000 energy audits made on a wide range of different companies, all related to produced quantity of compressed air and energy consumed by CASs. Collected data present some limitations and related improvements and corrective actions have been undertaken and are presented in the followings. Data analyses have been followed by complementary surveys regarding compressed air systems’ use, maintenance and monitoring practices performed within several Italian enterprises and aimed at enhancing and creating a more reliable baseline for benchmarking.
Simone Salvatori; Miriam Benedetti; Francesca Bonfà; Vito Introna; Stefano Ubertini. Inter-sectorial benchmarking of compressed air generation energy performance: Methodology based on real data gathering in large and energy-intensive industrial firms. Applied Energy 2018, 217, 266 -280.
AMA StyleSimone Salvatori, Miriam Benedetti, Francesca Bonfà, Vito Introna, Stefano Ubertini. Inter-sectorial benchmarking of compressed air generation energy performance: Methodology based on real data gathering in large and energy-intensive industrial firms. Applied Energy. 2018; 217 ():266-280.
Chicago/Turabian StyleSimone Salvatori; Miriam Benedetti; Francesca Bonfà; Vito Introna; Stefano Ubertini. 2018. "Inter-sectorial benchmarking of compressed air generation energy performance: Methodology based on real data gathering in large and energy-intensive industrial firms." Applied Energy 217, no. : 266-280.
Proton exchange membrane fuel cells are a promising and mature technology for combined heat and power plants. High efficiency (in particular for small size devices), practically zero pollutant emissions, noiseless operation and fast response to transient demand make these energy systems excellent prime movers for residential and commercial application. Nevertheless, due to large capital costs, their utilization and commercialization are still limited to demonstrative projects. In this scenario, we are working on a research project, called AutoRe, which utilizes an automotive derivative fuel cell for a cogeneration plant to create a synergy between two non competitive industries (automotive and stationary plants) and to realize a significant economy of scale that will drastically cut the costs of fuel cell based cogenerative plants. In this paper, we perform a thorough techno-economic analysis of the AutoRe (AUTomotive deRivative Energy system) power plant. A number of realistic energy management scenarios are constructed by varying the energy demand, the climatic condition, the energy cost, and the efficiency of the surrounding energy system. The control strategy is determined on an hourly basis, by minimizing the cost or the primary energy consumption through a graph based methodology. The resulting global parameters are compared to a reference scenario where electricity is acquired from the grid and heat is locally produced through a natural gas boiler. We consider 5 different building types (Office, Apartment district, Clinic, Hotel, Supermarket), 5 different climatic conditions (Hot, Cooling Based, Moderate, Heating based, Cold), and 2 different surrounding energy systems (USA and Europe). The results show that overall the proposed plant is economically sustainable and effective in reducing the energy costs and the primary energy consumption. Nevertheless, the building type and the energy prices impact on the return on investment, while the climatic condition affects the relative cost and energy variations. In the US scenario, the management based on cost and primary energy minimization exhibits similar patterns. On the contrary, in Europe cost minimization might increase the primary energy consumption with respect to the reference scenario.
Andrea L. Facci; Stefano Ubertini. Analysis of a fuel cell combined heat and power plant under realistic smart management scenarios. Applied Energy 2018, 216, 60 -72.
AMA StyleAndrea L. Facci, Stefano Ubertini. Analysis of a fuel cell combined heat and power plant under realistic smart management scenarios. Applied Energy. 2018; 216 ():60-72.
Chicago/Turabian StyleAndrea L. Facci; Stefano Ubertini. 2018. "Analysis of a fuel cell combined heat and power plant under realistic smart management scenarios." Applied Energy 216, no. : 60-72.
Andrea L. Facci; Stefano Ubertini. Meta-heuristic optimization for a high-detail smart management of complex energy systems. Energy Conversion and Management 2018, 160, 341 -353.
AMA StyleAndrea L. Facci, Stefano Ubertini. Meta-heuristic optimization for a high-detail smart management of complex energy systems. Energy Conversion and Management. 2018; 160 ():341-353.
Chicago/Turabian StyleAndrea L. Facci; Stefano Ubertini. 2018. "Meta-heuristic optimization for a high-detail smart management of complex energy systems." Energy Conversion and Management 160, no. : 341-353.
Vesselin Krastev; Andrea L. Facci; Stefano Ubertini. Asymmetric water impact of a two dimensional wedge: A systematic numerical study with transition to ventilating flow conditions. Ocean Engineering 2018, 147, 386 -398.
AMA StyleVesselin Krastev, Andrea L. Facci, Stefano Ubertini. Asymmetric water impact of a two dimensional wedge: A systematic numerical study with transition to ventilating flow conditions. Ocean Engineering. 2018; 147 ():386-398.
Chicago/Turabian StyleVesselin Krastev; Andrea L. Facci; Stefano Ubertini. 2018. "Asymmetric water impact of a two dimensional wedge: A systematic numerical study with transition to ventilating flow conditions." Ocean Engineering 147, no. : 386-398.
In February 2017 the “Carbonaceous Aerosol in Rome and Environs (CARE)” experiment was carried out in downtown Rome to address the following specific questions: what is the color, size, composition, and toxicity of the carbonaceous aerosol in the Mediterranean urban background area of Rome? The motivation of this experiment is the lack of understanding of what aerosol types are responsible for the severe risks to human health posed by particulate matter (PM) pollution, and how carbonaceous aerosols influence radiative balance. Physicochemical properties of the carbonaceous aerosol were characterised, and relevant toxicological variables assessed. The aerosol characterisation includes: (i) measurements with high time resolution (min to 1–2 h) at a fixed location of black carbon (eBC), elemental carbon (EC), organic carbon (OC), particle number size distribution (0.008–10 μm), major non refractory PM1 components, elemental composition, wavelength-dependent optical properties, and atmospheric turbulence; (ii) 24-h measurements of PM10 and PM2.5 mass concentration, water soluble OC and brown carbon (BrC), and levoglucosan; (iii) mobile measurements of eBC and size distribution around the study area, with computational fluid dynamics modeling; (iv) characterisation of road dust emissions and their EC and OC content. The toxicological assessment includes: (i) preliminary evaluation of the potential impact of ultrafine particles on lung epithelia cells (cultured at the air liquid interface and directly exposed to particles); (ii) assessment of the oxidative stress induced by carbonaceous aerosols; (iii) assessment of particle size dependent number doses deposited in different regions of the human body; (iv) PAHs biomonitoring (from the participants into the mobile measurements). The first experimental results of the CARE experiment are presented in this paper. The objective here is to provide baseline levels of carbonaceous aerosols for Rome, and to address future research directions. First, we found that BC and EC mass concentration in Rome are larger than those measured in similar urban areas across Europe (the urban background mass concentration of eBC in Rome in winter being on average 2.6 ± 2.5 μg · m−3, mean eBC at the peak level hour being 5.2 (95% CI = 5.0–5.5) μg · m−3 ). Then, we discussed significant variations of carbonaceous aerosol properties occurring with time scales of minutes, and questioned on the data averaging period used in current air quality standard for PM10 (24-h). Third, we showed that the oxidative potential induced by aerosol depends on particle size and composition, the effects of toxicity being higher with lower mass concentrations and smaller particle size. Albeit this is a preliminary analysis, findings reinforce the need for an urgent update of existing air quality standards for PM10 and PM2.5 with regard to particle composition and size distribution, and data averaging period. Our results reinforce existing concerns about the toxicity of carbonaceous aerosols, support the existing evidence indicating that particle size distribution and composition may play a role in the generation of this toxicity, and remark the need to consider a shorter averaging period (<1 h) in these new standards.
Francesca Costabile; Honey Alas; Michaela Aufderheide; Pasquale Avino; Fulvio Amato; Stefania Argentini; Francesca Barnaba; Massimo Berico; Vera Bernardoni; Riccardo Biondi; Giampietro Casasanta; Spartaco Ciampichetti; Giulia Calzolai; Silvia Canepari; Alessandro Conidi; Eugenia Cordelli; Antonio Di Ianni; Luca Di Liberto; Maria Cristina Facchini; Andrea Facci; Daniele Frasca; Stefania Gilardoni; Maria Giuseppa Grollino; Maurizio Gualtieri; Franco Lucarelli; Antonella Malaguti; Maurizio Manigrasso; Mauro Montagnoli; Silvia Nava; Cinzia Perrino; Elio Padoan; Igor Petenko; Xavier Querol; Giulia Simonetti; Giovanna Tranfo; Stefano Ubertini; Gianluigi Valli; Sara Valentini; Roberta Vecchi; Francesca Volpi; Kay Weinhold; Alfred Wiedensohler; Gabriele Zanini; Gian Paolo Gobbi; Ettore Petralia. First Results of the “Carbonaceous Aerosol in Rome and Environs (CARE)” Experiment: Beyond Current Standards for PM10. Atmosphere 2017, 8, 249 .
AMA StyleFrancesca Costabile, Honey Alas, Michaela Aufderheide, Pasquale Avino, Fulvio Amato, Stefania Argentini, Francesca Barnaba, Massimo Berico, Vera Bernardoni, Riccardo Biondi, Giampietro Casasanta, Spartaco Ciampichetti, Giulia Calzolai, Silvia Canepari, Alessandro Conidi, Eugenia Cordelli, Antonio Di Ianni, Luca Di Liberto, Maria Cristina Facchini, Andrea Facci, Daniele Frasca, Stefania Gilardoni, Maria Giuseppa Grollino, Maurizio Gualtieri, Franco Lucarelli, Antonella Malaguti, Maurizio Manigrasso, Mauro Montagnoli, Silvia Nava, Cinzia Perrino, Elio Padoan, Igor Petenko, Xavier Querol, Giulia Simonetti, Giovanna Tranfo, Stefano Ubertini, Gianluigi Valli, Sara Valentini, Roberta Vecchi, Francesca Volpi, Kay Weinhold, Alfred Wiedensohler, Gabriele Zanini, Gian Paolo Gobbi, Ettore Petralia. First Results of the “Carbonaceous Aerosol in Rome and Environs (CARE)” Experiment: Beyond Current Standards for PM10. Atmosphere. 2017; 8 (12):249.
Chicago/Turabian StyleFrancesca Costabile; Honey Alas; Michaela Aufderheide; Pasquale Avino; Fulvio Amato; Stefania Argentini; Francesca Barnaba; Massimo Berico; Vera Bernardoni; Riccardo Biondi; Giampietro Casasanta; Spartaco Ciampichetti; Giulia Calzolai; Silvia Canepari; Alessandro Conidi; Eugenia Cordelli; Antonio Di Ianni; Luca Di Liberto; Maria Cristina Facchini; Andrea Facci; Daniele Frasca; Stefania Gilardoni; Maria Giuseppa Grollino; Maurizio Gualtieri; Franco Lucarelli; Antonella Malaguti; Maurizio Manigrasso; Mauro Montagnoli; Silvia Nava; Cinzia Perrino; Elio Padoan; Igor Petenko; Xavier Querol; Giulia Simonetti; Giovanna Tranfo; Stefano Ubertini; Gianluigi Valli; Sara Valentini; Roberta Vecchi; Francesca Volpi; Kay Weinhold; Alfred Wiedensohler; Gabriele Zanini; Gian Paolo Gobbi; Ettore Petralia. 2017. "First Results of the “Carbonaceous Aerosol in Rome and Environs (CARE)” Experiment: Beyond Current Standards for PM10." Atmosphere 8, no. 12: 249.
Effective energy storage technologies represent one of the key elements to solving the growing challenges of electrical energy supply of the 21st century. Several energy storage systems are available, from ones that are technologically mature to others still at a research stage. Each technology has its inherent limitations that make its use economically or practically feasible only for specific applications. The present paper aims at integrating hydrogen generation into compressed air energy storage systems to avoid natural gas combustion or thermal energy storage. A proper design of such a hybrid storage system could provide high roundtrip efficiencies together with enhanced flexibility thanks to the possibility of providing additional energy outputs (heat, cooling, and hydrogen as a fuel), in a distributed energy storage framework. Such a system could be directly connected to the power grid at the distribution level to reduce power and energy intermittence problems related to renewable energy generation. Similarly, it could be located close to the user (e.g., office buildings, commercial centers, industrial plants, hospitals, etc.). Finally, it could be integrated in decentralized energy generation systems to reduce the peak electricity demand charges and energy costs, to increase power generation efficiency, to enhance the security of electrical energy supply, and to facilitate the market penetration of small renewable energy systems. Different configurations have been investigated (simple hybrid storage system, regenerate system, multistage system) demonstrating the compressed air and hydrogen storage systems effectiveness in improving energy source flexibility and efficiency, and possibly in reducing the costs of energy supply. Round-trip efficiency up to 65% can be easily reached. The analysis is conducted through a mixed theoretical-numerical approach, which allows the definition of the most relevant physical parameters affecting the system performance.
Stefano Ubertini; Andrea Luigi Facci; Luca Andreassi. Hybrid Hydrogen and Mechanical Distributed Energy Storage. Energies 2017, 10, 2035 .
AMA StyleStefano Ubertini, Andrea Luigi Facci, Luca Andreassi. Hybrid Hydrogen and Mechanical Distributed Energy Storage. Energies. 2017; 10 (12):2035.
Chicago/Turabian StyleStefano Ubertini; Andrea Luigi Facci; Luca Andreassi. 2017. "Hybrid Hydrogen and Mechanical Distributed Energy Storage." Energies 10, no. 12: 2035.
Andrea Luigi Facci; Gabriele Loreti; Stefano Ubertini; Frano Barbir; Thomas Chalkidis; Rolf-Peter Eßling; Thijs Peters; Efthalia Skoufa; Roberto Bove. Numerical Assessment of an Automotive Derivative CHP Fuel Cell System. Energy Procedia 2017, 105, 1564 -1569.
AMA StyleAndrea Luigi Facci, Gabriele Loreti, Stefano Ubertini, Frano Barbir, Thomas Chalkidis, Rolf-Peter Eßling, Thijs Peters, Efthalia Skoufa, Roberto Bove. Numerical Assessment of an Automotive Derivative CHP Fuel Cell System. Energy Procedia. 2017; 105 ():1564-1569.
Chicago/Turabian StyleAndrea Luigi Facci; Gabriele Loreti; Stefano Ubertini; Frano Barbir; Thomas Chalkidis; Rolf-Peter Eßling; Thijs Peters; Efthalia Skoufa; Roberto Bove. 2017. "Numerical Assessment of an Automotive Derivative CHP Fuel Cell System." Energy Procedia 105, no. : 1564-1569.
Here we present the technical and economical performances of a small scale trigeneration power plant based on solid oxide fuel cells and designed for a small residential cluster (i.e. 10 apartments). The energy system features a natural gas solid oxide fuel cell, a boiler, a refrigerator, and a thermal storage system. We compare different power plant configurations varying the size of the fuel cell and the refrigeration technology to satisfy the chilling demand (i.e. absorption or mechanical chiller). Given that the ability to meet the power demand is crucial in this kind of applications, the plant performances are assessed following an optimal control strategy, as a function of different energy demand profiles and electricity prices, and of rated and part load efficiencies of each energy converter. The optimization of the energy system operating strategy is performed through a graph theory-based methodology. Results are provided in terms of electrical and thermal efficiency, operating strategy, as well as economic saving, primary energy consumption reduction, and pay back period, considering different capital costs of the fuel cell
Andrea L. Facci; Viviana Cigolotti; Elio Jannelli; Stefano Ubertini. Technical and economic assessment of a SOFC-based energy system for combined cooling, heating and power. Applied Energy 2017, 192, 563 -574.
AMA StyleAndrea L. Facci, Viviana Cigolotti, Elio Jannelli, Stefano Ubertini. Technical and economic assessment of a SOFC-based energy system for combined cooling, heating and power. Applied Energy. 2017; 192 ():563-574.
Chicago/Turabian StyleAndrea L. Facci; Viviana Cigolotti; Elio Jannelli; Stefano Ubertini. 2017. "Technical and economic assessment of a SOFC-based energy system for combined cooling, heating and power." Applied Energy 192, no. : 563-574.
Umberto Desideri; Stefano Ubertini. Editorial. Applied Energy 2017, 192, 421 .
AMA StyleUmberto Desideri, Stefano Ubertini. Editorial. Applied Energy. 2017; 192 ():421.
Chicago/Turabian StyleUmberto Desideri; Stefano Ubertini. 2017. "Editorial." Applied Energy 192, no. : 421.
Pierluigi Fanelli; Chiara Biscarini; Elio Jannelli; Filippo Ubertini; Stefano Ubertini. Structural health monitoring of cylindrical bodies under impulsive hydrodynamic loading by distributed FBG strain measurements. Measurement Science and Technology 2017, 28, 024006 .
AMA StylePierluigi Fanelli, Chiara Biscarini, Elio Jannelli, Filippo Ubertini, Stefano Ubertini. Structural health monitoring of cylindrical bodies under impulsive hydrodynamic loading by distributed FBG strain measurements. Measurement Science and Technology. 2017; 28 (2):024006.
Chicago/Turabian StylePierluigi Fanelli; Chiara Biscarini; Elio Jannelli; Filippo Ubertini; Stefano Ubertini. 2017. "Structural health monitoring of cylindrical bodies under impulsive hydrodynamic loading by distributed FBG strain measurements." Measurement Science and Technology 28, no. 2: 024006.
Nicola Cavalagli; Chiara Biscarini; Andrea L. Facci; Filippo Ubertini; Stefano Ubertini. Experimental and numerical analysis of energy dissipation in a sloshing absorber. Journal of Fluids and Structures 2017, 68, 466 -481.
AMA StyleNicola Cavalagli, Chiara Biscarini, Andrea L. Facci, Filippo Ubertini, Stefano Ubertini. Experimental and numerical analysis of energy dissipation in a sloshing absorber. Journal of Fluids and Structures. 2017; 68 ():466-481.
Chicago/Turabian StyleNicola Cavalagli; Chiara Biscarini; Andrea L. Facci; Filippo Ubertini; Stefano Ubertini. 2017. "Experimental and numerical analysis of energy dissipation in a sloshing absorber." Journal of Fluids and Structures 68, no. : 466-481.
R. Panciroli; C. Biscarini; G. Falcucci; E. Jannelli; S. Ubertini. Live monitoring of the distributed strain field in impulsive events through fiber Bragg gratings. Journal of Fluids and Structures 2016, 61, 60 -75.
AMA StyleR. Panciroli, C. Biscarini, G. Falcucci, E. Jannelli, S. Ubertini. Live monitoring of the distributed strain field in impulsive events through fiber Bragg gratings. Journal of Fluids and Structures. 2016; 61 ():60-75.
Chicago/Turabian StyleR. Panciroli; C. Biscarini; G. Falcucci; E. Jannelli; S. Ubertini. 2016. "Live monitoring of the distributed strain field in impulsive events through fiber Bragg gratings." Journal of Fluids and Structures 61, no. : 60-75.