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Prof. Dr. Daniele Chiappini
Department of Engineering, University of Rome Niccolò Cusano, Rome (zip code: 00166), Italy

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Research Keywords & Expertise

0 phase change materials
0 Computational Fluid Dynamics
0 Fuel cell modeling
0 Multiphase flows modeling
0 Multi-physics solvers

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Journal article
Published: 20 July 2021 in Renewable Energy
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In this paper, a hybrid renewable power plant with a storage system is designed. The benefits of sizing and energy management are assessed for a commercial building under eight different climatic conditions in the United States. In the considered system, photovoltaic panels are coupled to a unitized regenerative solid oxide fuel cell. The use of biogas to feed unitized regenerative solid oxide fuel cell is investigated, employing a detailed electrochemical model of electrolyzer and fuel cell modes. A battery pack is included in the plant as a secondary storage system, together with a diesel engine operating in backup mode. Four scenarios where biogas amount is varied together with the initial state of charge of the battery were evaluated. Results demonstrate that the power plant can operate with 100 % renewable procurement if the digester produces from 6000 to 9500 stdm3/y and the battery is completely charged at the beginning of the year. By reducing the biogas availability or starting with a low state of charge, the use of the diesel generator is inevitable. The study confirms that the proposed hybrid renewable power plant is technically feasible and can be considered a reliable and clean energy source in other areas and buildings.

ACS Style

Barbara Mendecka; Daniele Chiappini; Laura Tribioli; Raffaello Cozzolino. A biogas-solar based hybrid off-grid power plant with multiple storages for United States commercial buildings. Renewable Energy 2021, 179, 705 -722.

AMA Style

Barbara Mendecka, Daniele Chiappini, Laura Tribioli, Raffaello Cozzolino. A biogas-solar based hybrid off-grid power plant with multiple storages for United States commercial buildings. Renewable Energy. 2021; 179 ():705-722.

Chicago/Turabian Style

Barbara Mendecka; Daniele Chiappini; Laura Tribioli; Raffaello Cozzolino. 2021. "A biogas-solar based hybrid off-grid power plant with multiple storages for United States commercial buildings." Renewable Energy 179, no. : 705-722.

Journal article
Published: 22 February 2021 in International Journal of Thermal Sciences
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The aim of this work is to present results obtained through a multi-physics solver used to numerically determine the thermal behaviour of a phase change material both for solidification and melting processes. Particular attention is addressed to the right implementation of PCM properties, which are not constant with respect to the considered phase. Thus, the energy equation is specifically rewritten for the PCM material in terms of enthalpy, in order to consider both sensible and latent heat. Liquid and solid enthalpy thresholds are fixed with respect to solid/liquid properties, to correctly determine the amount of PCM which undergoes the phase change. The implemented model allows varying the temperature (enthalpy) range where the phase change takes place. The influence of mushy area thickness (the intermediate zone between solid and liquid) has analysed both for charging and discharging processes in a heat exchanger-like geometry. Additionally, the LB equation itself is rewritten in order to deal with the solidification/melting front advance. Results show how the under-analysis phenomena are sensitive to solidification/melting front thickness, with predominant effects whenever conduction is the thermal driver. Effects are definitely tamed while convection plays a role. Results also show how, for the implemented heat exchanger operating conditions, the considered PCM (PureTemp37) can be completely melted in 5 h, independently from the mushy zone thickness (ΔT=[0.01,1.00,3.00]K). On the contrary, for the same duration of the discharging process, the solidified fraction ranges from 23% up to 35% whereas the mushy zone ΔT ranges from 0.01 K up to 3.00 K.Numerical results are compared with a set of literature/analytical data available for a range of non-dimensional numbers and both for conduction and convection driven phenomena. The agreement between numerical and literature data is satisfactory with positive outcomes for future model developments.

ACS Style

Daniele Chiappini. A coupled lattice Boltzmann-finite volume method for phase change material analysis. International Journal of Thermal Sciences 2021, 164, 106893 .

AMA Style

Daniele Chiappini. A coupled lattice Boltzmann-finite volume method for phase change material analysis. International Journal of Thermal Sciences. 2021; 164 ():106893.

Chicago/Turabian Style

Daniele Chiappini. 2021. "A coupled lattice Boltzmann-finite volume method for phase change material analysis." International Journal of Thermal Sciences 164, no. : 106893.

Journal article
Published: 23 December 2020 in Energies
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In this work, the problem of reducing the energy consumption of the cooling circuit for the propulsion system of an all-electric vehicle is approached with two different concepts: improvement of the powertrain efficiency and optimization of the control strategy. Improvement of the powertrain efficiency is obtained through a modular design, which consists of replacing the electric powertrain with several smaller traction modules whose powers sum up to the total power of the original powertrain. In this paper, it is shown how modularity, among other benefits, also allows reducing the energy consumption of the cooling system up to 54%. The energy consumption of the cooling system is associated with two components: the pump and the fan. They produce a so-called auxiliary load on the battery, reducing the maximum range of the vehicle. In conventional cooling systems, the pump and the fan are controlled with a thermostat, without taking into account the energy consumption. Conversely, in this work a control strategy to reduce the auxiliary loads is developed and compared with the conventional approach, showing that the energy consumption of the cooling system can be reduced up to 27%. To test the control strategy, numerical simulations have been carried out with a 1-D model of the cooling system. On the other hand, all the thermal loads of the components have been calculated with a vehicle simulator, which is able to predict the vehicle’s behavior under different driving cycles.

ACS Style

Simone Lombardi; Manfredi Villani; Daniele Chiappini; Laura Tribioli. Cooling System Energy Consumption Reduction through a Novel All-Electric Powertrain Traction Module and Control Optimization. Energies 2020, 14, 33 .

AMA Style

Simone Lombardi, Manfredi Villani, Daniele Chiappini, Laura Tribioli. Cooling System Energy Consumption Reduction through a Novel All-Electric Powertrain Traction Module and Control Optimization. Energies. 2020; 14 (1):33.

Chicago/Turabian Style

Simone Lombardi; Manfredi Villani; Daniele Chiappini; Laura Tribioli. 2020. "Cooling System Energy Consumption Reduction through a Novel All-Electric Powertrain Traction Module and Control Optimization." Energies 14, no. 1: 33.

Journal article
Published: 11 December 2020 in Energy
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This paper presents the design, energy management and economic analysis of an off-grid power plant for a strip mall. The main goal is to achieve a 100% renewable operation, by using a photovoltaic panel array coupled to a battery and a unitized regenerative solid oxide fuel cell fed both with self-generated hydrogen and biogas produced from food waste in an on-site anaerobic digester. The power plant has been modeled by means of a self-made Matlab/Simulink® simulator and the plant operation has been simulated against different radiation and load demand scenarios. Results are compared both in terms of energetic and economic performance. In particular, it is observed that the annualized capital costs for unitized regenerative solid oxide fuel cell cover from 50% up to 58% of the total investment cost and from 71% up to 75% of the total replacement costs. Depending on the scenario and the specific tipping fee, tipping costs vary from a minimum of 9,793 $/y to a maximum 47,335 $/y. For all the analyzed scenarios, the cost of energy is higher than the grid electricity price, but the 100% renewable operation of the plant and the on-site waste conversion to biogas make this solution worth of investigation.

ACS Style

Raffaello Cozzolino; Daniele Chiappini; Laura Tribioli. Off-grid PV/URFC power plant fueled with biogas from food waste: An energetic and economic analysis. Energy 2020, 219, 119537 .

AMA Style

Raffaello Cozzolino, Daniele Chiappini, Laura Tribioli. Off-grid PV/URFC power plant fueled with biogas from food waste: An energetic and economic analysis. Energy. 2020; 219 ():119537.

Chicago/Turabian Style

Raffaello Cozzolino; Daniele Chiappini; Laura Tribioli. 2020. "Off-grid PV/URFC power plant fueled with biogas from food waste: An energetic and economic analysis." Energy 219, no. : 119537.

Journal article
Published: 22 June 2020 in Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences
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The aim of this work is to present a lattice Boltzmann (LB) model devoted to dealing with non-Newtonian free surface flow. The combination of LB solver with a free-surface model allows dealing with multiphase flows where the density ratio in between the two considered phases is so high that the lighter phase can be neglected. For this particular set of multiphase models, the interface between the two phases is numerically reconstructed and transported via a diffusion equation. Moreover, the application of a Carreau approach for viscosity modelling allows the introduction of effects related to shear stress on fluid flow evolution. Two different non-Newtonian silicon-like materials have been considered here, namely the polystyrene and acrylonitrile butadiene styrene. Here, the author, after the mandatory model validation with a reference configuration, presents some applications of injection moulding for two different test-cases: the former is the injection in a labyrinth-like gasket, whereas the latter is the injection in a porous media. This article is part of the theme issue ‘Fluid dynamics, soft matter and complex systems: recent results and new methods’.

ACS Style

Daniele Chiappini. A lattice-Boltzmann free surface model for injection moulding of a non-Newtonian fluid. Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 2020, 378, 20190407 .

AMA Style

Daniele Chiappini. A lattice-Boltzmann free surface model for injection moulding of a non-Newtonian fluid. Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences. 2020; 378 (2175):20190407.

Chicago/Turabian Style

Daniele Chiappini. 2020. "A lattice-Boltzmann free surface model for injection moulding of a non-Newtonian fluid." Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 378, no. 2175: 20190407.

Journal article
Published: 24 April 2020 in Water
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In this study, the capabilities of a coupled KBC-free surface model to deal with fluid solid interactions with the slamming of rigid obstacles in a calm water tank were analyzed. The results were firstly validated with experimental and numerical data available in literature and, thereafter, some additional analyses was carried out to understand the main parameters’ influence on slamming coefficient. The effect of grid resolution and Reynolds number were firstly considered to choose the proper grid and to present the weak impact of such a non-dimensional number on process evolution. Hence, the influence of Froude number on fluid-dynamics quantities was pointed out considering vertical impacts of both cylindrical, as in the references, and ellipsoidal obstacles. Different formulations of slamming coefficient were used and compared. Results are pretty encouraging and they confirm the effectiveness of lattice Boltzmann model to deal with such a problem. This leaves the door open to additional improvements addressed to the study of free buoyant bodies immersed in a fluid domain.

ACS Style

Daniele Chiappini. Fluid Structure Interaction of 2D Objects through a Coupled KBC-Free Surface Model. Water 2020, 12, 1212 .

AMA Style

Daniele Chiappini. Fluid Structure Interaction of 2D Objects through a Coupled KBC-Free Surface Model. Water. 2020; 12 (4):1212.

Chicago/Turabian Style

Daniele Chiappini. 2020. "Fluid Structure Interaction of 2D Objects through a Coupled KBC-Free Surface Model." Water 12, no. 4: 1212.

Journal article
Published: 27 September 2019 in Energy Conversion and Management
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In this paper, a novel tubes-in-tank thermal energy storage (TIT-TES) based on open-cell copper foams immersed in organic paraffin is presented and experimentally studied. The system consists of a rectangular external case which encloses 16 U-tubes and phase change material (PCM) embedded in copper foams matrix, which guarantee an average power during both heat charge and discharge phases close to 1 kW and high storing/releasing energy efficiency. With the aim of measuring internal temperature, six thermocouples have been installed at two different sections, S1 and S2, located at 1/3 and at 2/3 of the total height, respectively. In order to thermally characterize the system during the heat charge and discharge phases, a series of tests have carried out under different inlet temperatures and flow rate of the heat transfer fluid (HTF). Temperature evolutions have obtained during the tests, and directional temperature derivative profiles, time-durations, average powers and energy efficiencies have derived so to evaluate and characterize the TIT-TES performance. The results have shown how both HTF volumetric flow rate and inlet temperature play a relevant role in heat charge and discharge phases. A larger temperature difference between the HTF and the PCM and a higher HTF input flow rate improve heat transfer and consequently increase the average exchanged power and energy efficiency as well. In particular, during the thermal charge phase, when the HTF temperature increases from 80 °C to 90 °C, the energy efficiencies increase from 73.6% to 91.4% and from 78.7% to 93.8% for the minimum and maximum HTF flow conditions respectively. The analysis of directional temperature derivative profiles have allowed to define some important characteristics of the apparatus, highlighting the preferential directions of the liquefaction/solidification front paths, and also confirming the importance of the HTF inlet temperature and flow rate.

ACS Style

Raffaello Cozzolino; Daniele Chiappini; Gino Bella. Experimental characterisation of a novel thermal energy storage based on open-cell copper foams immersed in organic phase change material. Energy Conversion and Management 2019, 200, 112101 .

AMA Style

Raffaello Cozzolino, Daniele Chiappini, Gino Bella. Experimental characterisation of a novel thermal energy storage based on open-cell copper foams immersed in organic phase change material. Energy Conversion and Management. 2019; 200 ():112101.

Chicago/Turabian Style

Raffaello Cozzolino; Daniele Chiappini; Gino Bella. 2019. "Experimental characterisation of a novel thermal energy storage based on open-cell copper foams immersed in organic phase change material." Energy Conversion and Management 200, no. : 112101.

Article
Published: 17 May 2019 in Physical Review E
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The lattice Boltzmann method (LBM) is routinely employed in the simulation of complex multiphase flows comprising bulk phases separated by nonideal interfaces. The LBM is intrinsically mesoscale with a hydrodynamic equivalence popularly set by the Chapman-Enskog analysis, requiring that fields slowly vary in space and time. The latter assumptions become questionable close to interfaces where the method is also known to be affected by spurious nonhydrodynamical contributions. This calls for quantitative hydrodynamical checks. In this paper, we analyze the hydrodynamic behavior of the LBM pseudopotential models for the problem of the breakup of a liquid ligament triggered by the Plateau-Rayleigh instability. Simulations are performed at fixed interface thickness, while increasing the ligament radius, i.e., in the “sharp interface” limit. The influence of different LBM collision operators is also assessed. We find that different distributions of spurious currents along the interface may change the outcome of the pseudopotential model simulations quite sensibly, which suggests that a proper fine-tuning of pseudopotential models in time-dependent problems is needed before the utilization in concrete applications. Taken all together, we argue that the results of the proposed paper provide a valuable insight for engineering pseudopotential model applications involving the hydrodynamics of liquid jets.

ACS Style

Daniele Chiappini; Mauro Sbragaglia; Xiao Xue; Giacomo Falcucci. Hydrodynamic behavior of the pseudopotential lattice Boltzmann method for interfacial flows. Physical Review E 2019, 99, 053305 .

AMA Style

Daniele Chiappini, Mauro Sbragaglia, Xiao Xue, Giacomo Falcucci. Hydrodynamic behavior of the pseudopotential lattice Boltzmann method for interfacial flows. Physical Review E. 2019; 99 (5):053305.

Chicago/Turabian Style

Daniele Chiappini; Mauro Sbragaglia; Xiao Xue; Giacomo Falcucci. 2019. "Hydrodynamic behavior of the pseudopotential lattice Boltzmann method for interfacial flows." Physical Review E 99, no. 5: 053305.

Proceedings article
Published: 09 November 2018 in Volume 9: Mechanics of Solids, Structures, and Fluids
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In this work, we perform a numerical study on the flow induced by the motion of a rigid cantilever beam undergoing finite amplitude oscillations, in a viscous fluid, under a free surface. To this aim, we use a lattice Boltzmann volume of fluid (LB-VOF) integrated method, which includes the tracking of the fluid surface. The adopted approach couples the simplicity of the LB method with the possibility to track the free surface by means of a VOF strategy. Through a parametric analysis, we study the effects related to the depth of submergence, for several values of the oscillation frequency and amplitude. Results are provided in terms of a complex hydrodynamic function, whose real and imaginary parts are the added mass and the viscous damping, respectively, acting on the lamina. Validation of the results is carried out by comparing the solution, for the limit case of lamina submerged in an infinite fluid, with those from available literature studies. We find that the presence of the free surface strongly influences the flow physics around the lamina, especially at low values of the depth of submergence. In facts, when the lamina approaches to the free surface, the fluid waves, generated by the motion of the lamina, interact with the oscillating body itself, giving rise to additional effects, which we quantify in terms of added mass and viscous damping.

ACS Style

Daniele Chiappini; Giovanni Di Ilio; Gino Bella. Analysis of the Fluid Motion Induced by a Vibrating Lamina Through Free Surface-Lattice Boltzmann Coupled Method. Volume 9: Mechanics of Solids, Structures, and Fluids 2018, 1 .

AMA Style

Daniele Chiappini, Giovanni Di Ilio, Gino Bella. Analysis of the Fluid Motion Induced by a Vibrating Lamina Through Free Surface-Lattice Boltzmann Coupled Method. Volume 9: Mechanics of Solids, Structures, and Fluids. 2018; ():1.

Chicago/Turabian Style

Daniele Chiappini; Giovanni Di Ilio; Gino Bella. 2018. "Analysis of the Fluid Motion Induced by a Vibrating Lamina Through Free Surface-Lattice Boltzmann Coupled Method." Volume 9: Mechanics of Solids, Structures, and Fluids , no. : 1.

Conference paper
Published: 10 July 2018 in INTERNATIONAL CONFERENCE OF NUMERICAL ANALYSIS AND APPLIED MATHEMATICS (ICNAAM 2017)
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ACS Style

Daniele Chiappini; Giacomo Falcucci; Vesselin Krastev. Overview on ICNAAM 2017 Session on Hull Slamming and Water-Entry Problems. INTERNATIONAL CONFERENCE OF NUMERICAL ANALYSIS AND APPLIED MATHEMATICS (ICNAAM 2017) 2018, 1978, 420001 .

AMA Style

Daniele Chiappini, Giacomo Falcucci, Vesselin Krastev. Overview on ICNAAM 2017 Session on Hull Slamming and Water-Entry Problems. INTERNATIONAL CONFERENCE OF NUMERICAL ANALYSIS AND APPLIED MATHEMATICS (ICNAAM 2017). 2018; 1978 (1):420001.

Chicago/Turabian Style

Daniele Chiappini; Giacomo Falcucci; Vesselin Krastev. 2018. "Overview on ICNAAM 2017 Session on Hull Slamming and Water-Entry Problems." INTERNATIONAL CONFERENCE OF NUMERICAL ANALYSIS AND APPLIED MATHEMATICS (ICNAAM 2017) 1978, no. 1: 420001.

Conference paper
Published: 10 July 2018 in AIP Conference Proceedings
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Free-surface flow problems represent an important class of problems in fluid dynamics. They occur in a wide range of applications and they involve many research fields, from naval architecture to civil and environmental engineering. Typical examples of free-surface problems are the wave impact on structures, breaking dams, hydraulic jumps, and many others. Such problems often involve complex geometries and transient regimes. These features, together with the need of tracking the motion of the free surface to properly predict the physical phenomena, make these problems particularly difficult to handle. Therefore, the capability of a computational model to accurately describe the dynamic characteristics of free-surface flows is nowadays extremely attractive. In this work, the breaking dam case with solid obstacle is simulated via a LB free-surface KBC approach. To date, no attempts have been made to simulate free-surface flows by adopting such collision model. This study demonstrates the viability of this approach, which was found to be stable and accurate in the prediction of the fluid flow phenomena under analysis.

ACS Style

Daniele Chiappini; Giovanni Di Ilio. Water impact on obstacles using KBC-free surface lattice Boltzmann method. AIP Conference Proceedings 2018, 1978, 420002 .

AMA Style

Daniele Chiappini, Giovanni Di Ilio. Water impact on obstacles using KBC-free surface lattice Boltzmann method. AIP Conference Proceedings. 2018; 1978 (1):420002.

Chicago/Turabian Style

Daniele Chiappini; Giovanni Di Ilio. 2018. "Water impact on obstacles using KBC-free surface lattice Boltzmann method." AIP Conference Proceedings 1978, no. 1: 420002.

Conference paper
Published: 10 July 2018 in AIP Conference Proceedings
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The Plateau-Rayleigh instability causes the fragmentation of a liquid ligament into smaller droplets. In this study a numerical study of this phenomenon based on a single relaxation time (SRT) pseudo-potential lattice Boltzmann method (LBM) is proposed. If systematically analysed, this test case allows to design appropriate parameters sets to deal with engineering applications involving the hydrodynamics of a jet. Grid convergence simulations are performed in the limit where the interface thickness is asymptotically smaller than the characteristic size of the ligament. These simulations show a neat asymptotic behaviour, possibly related to the convergence of LBM diffuse-interface physics to sharp interface hydrodynamics.

ACS Style

Daniele Chiappini; Xiao Xue; Giacomo Falcucci; Mauro Sbragaglia. Ligament break-up simulation through pseudo-potential lattice Boltzmann method. AIP Conference Proceedings 2018, 1978, 420003 .

AMA Style

Daniele Chiappini, Xiao Xue, Giacomo Falcucci, Mauro Sbragaglia. Ligament break-up simulation through pseudo-potential lattice Boltzmann method. AIP Conference Proceedings. 2018; 1978 (1):420003.

Chicago/Turabian Style

Daniele Chiappini; Xiao Xue; Giacomo Falcucci; Mauro Sbragaglia. 2018. "Ligament break-up simulation through pseudo-potential lattice Boltzmann method." AIP Conference Proceedings 1978, no. 1: 420003.

Original articles
Published: 04 March 2018 in Numerical Heat Transfer, Part A: Applications
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This work presents a coupled lattice Boltzmann finite volume method for dealing with conjugate heat transfer problems. Lattice Boltzmann scheme is used for fluid-dynamics, while high-order finite volume method is implemented for temperature reconstruction. After a first validation with literature test cases, the method is applied to a heat exchanger with an insert made of porous medium, representative of an open-cell metal foam, innovative material largely used for its thermomechanical properties. This allows maximizing heat exchange processes with advantages in terms of efficiencies. Thus, the coupled method allows dealing with complex boundaries in multiphysics problems.

ACS Style

D. Chiappini; A. Festuccia; G. Bella. Coupled lattice Boltzmann finite volume method for conjugate heat transfer in porous media. Numerical Heat Transfer, Part A: Applications 2018, 73, 291 -306.

AMA Style

D. Chiappini, A. Festuccia, G. Bella. Coupled lattice Boltzmann finite volume method for conjugate heat transfer in porous media. Numerical Heat Transfer, Part A: Applications. 2018; 73 (5):291-306.

Chicago/Turabian Style

D. Chiappini; A. Festuccia; G. Bella. 2018. "Coupled lattice Boltzmann finite volume method for conjugate heat transfer in porous media." Numerical Heat Transfer, Part A: Applications 73, no. 5: 291-306.

Proceedings article
Published: 04 September 2017 in SAE Technical Paper Series
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ACS Style

Laura Tribioli; Paolo Iora; Raffaello Cozzolino; Daniele Chiappini. Influence of Fuel Type on the Pperformance of a Plug-In Fuel Cell/Battery Hybrid Vehicle with On-Board Fuel Processing. SAE Technical Paper Series 2017, 1, 1 .

AMA Style

Laura Tribioli, Paolo Iora, Raffaello Cozzolino, Daniele Chiappini. Influence of Fuel Type on the Pperformance of a Plug-In Fuel Cell/Battery Hybrid Vehicle with On-Board Fuel Processing. SAE Technical Paper Series. 2017; 1 ():1.

Chicago/Turabian Style

Laura Tribioli; Paolo Iora; Raffaello Cozzolino; Daniele Chiappini. 2017. "Influence of Fuel Type on the Pperformance of a Plug-In Fuel Cell/Battery Hybrid Vehicle with On-Board Fuel Processing." SAE Technical Paper Series 1, no. : 1.

Article
Published: 23 June 2017 in Energies
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This paper evaluates the performance of a fuel cell/battery vehicle with an on-board autothermal reformer, fed by different liquid and gaseous hydrocarbon fuels. A sensitivity analysis is performed to investigate the system behavior under the variation of the steam to carbon and oxygen to carbon ratios. This is done in order to identify the most suitable operating conditions for a direct on-board production of hydrogen to be used in a high temperature polymer electrolyte membrane fuel cell. The same system should be able to process different fuels, to allow the end-user to freely decide which one to use to refuel the vehicle. Hence, the obtained operating conditions result in a trade-off between system flexibility as the feeding fuel changes, CO poisoning effect on the fuel cell and overall efficiency. The system is thus coupled to a high temperature fuel cell, modeled by means of a self-made tool, able to reproduce the polarization curve as the input syngas composition varies, and the overall system is afterwards tested on a plug-in fuel cell/battery vehicle simulator, in order to provide a thorough feasibility analysis, focusing on the entire system efficiency. Results show that a proper energy management strategy can mitigate the effect of the fuel variation on the reformer efficiency, allowing for good overall powertrain performance.

ACS Style

Laura Tribioli; Raffaello Cozzolino; Daniele Chiappini. Technical Assessment of Different Operating Conditions of an On-Board Autothermal Reformer for Fuel Cell Vehicles. Energies 2017, 10, 839 .

AMA Style

Laura Tribioli, Raffaello Cozzolino, Daniele Chiappini. Technical Assessment of Different Operating Conditions of an On-Board Autothermal Reformer for Fuel Cell Vehicles. Energies. 2017; 10 (7):839.

Chicago/Turabian Style

Laura Tribioli; Raffaello Cozzolino; Daniele Chiappini. 2017. "Technical Assessment of Different Operating Conditions of an On-Board Autothermal Reformer for Fuel Cell Vehicles." Energies 10, no. 7: 839.

Article
Published: 27 January 2017 in Physical Review E
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In this work, a hybrid lattice Boltzmann method (HLBM) is proposed, where the standard lattice Boltzmann implementation based on the Bhatnagar-Gross-Krook (LBGK) approximation is combined together with an unstructured finite-volume lattice Boltzmann model. The method is constructed on an overlapping grid system, which allows the coexistence of a uniform lattice nodes spacing and a coordinate-free lattice structure. The natural adaptivity of the hybrid grid system makes the method particularly suitable to handle problems involving complex geometries. Moreover, the provided scheme ensures a high-accuracy solution near walls, given the capability of the unstructured submodel of achieving the desired level of refinement in a very flexible way. For these reasons, the HLBM represents a prospective tool for solving multiscale problems. The proposed method is here applied to the benchmark problem of a two-dimensional flow past a circular cylinder for a wide range of Reynolds numbers and its numerical performances are measured and compared with the standard LBGK ones.

ACS Style

G. Di Ilio; Daniele Chiappini; S. Ubertini; G. Bella; Sauro Succi. Hybrid lattice Boltzmann method on overlapping grids. Physical Review E 2017, 95, 013309 .

AMA Style

G. Di Ilio, Daniele Chiappini, S. Ubertini, G. Bella, Sauro Succi. Hybrid lattice Boltzmann method on overlapping grids. Physical Review E. 2017; 95 (1):013309.

Chicago/Turabian Style

G. Di Ilio; Daniele Chiappini; S. Ubertini; G. Bella; Sauro Succi. 2017. "Hybrid lattice Boltzmann method on overlapping grids." Physical Review E 95, no. 1: 013309.

Journal article
Published: 01 December 2016 in Applied Energy
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This paper describes the energy management controller design of a mid-sized vehicle driven by a fuel cell/battery plug-in hybrid powertrain, where an experimentally validated hight temperature polymer electrolyte membrane fuel cell model is used. The power management strategy is derived by the application of the Pontryagin's Minimum Principle, where the control parameter is adapted by using feedback information on the state of charge and total trip length forecast as a function of a moving average of past information about the driving cycle speed. The strategy we propose aims at achieving a real time suboptimal solution of the control problem which is cast into the minimization of the consumed fuel. The vehicle is also equipped by an auto-thermal reformer and, in order to minimize the hydrogen buffer size, the control algorithm is subject to constraints on the maximum hydrogen buffer level. A comparative analysis of the proposed strategy against the optimal one is conducted and results are reported. The obtained fuel consumptions are also compared to those obtained by the same vehicle, powered by an internal combustion engine and by a plug-in hybrid electric powertrain

ACS Style

Laura Tribioli; Raffaello Cozzolino; Daniele Chiappini; Paolo Iora. Energy management of a plug-in fuel cell/battery hybrid vehicle with on-board fuel processing. Applied Energy 2016, 184, 140 -154.

AMA Style

Laura Tribioli, Raffaello Cozzolino, Daniele Chiappini, Paolo Iora. Energy management of a plug-in fuel cell/battery hybrid vehicle with on-board fuel processing. Applied Energy. 2016; 184 ():140-154.

Chicago/Turabian Style

Laura Tribioli; Raffaello Cozzolino; Daniele Chiappini; Paolo Iora. 2016. "Energy management of a plug-in fuel cell/battery hybrid vehicle with on-board fuel processing." Applied Energy 184, no. : 140-154.

Journal article
Published: 23 November 2016 in International Journal of Modern Physics C
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A numerical study on incompressible laminar flow in symmetric channel with sudden expansion is conducted. In this work, Newtonian and non-Newtonian fluids are considered, where non-Newtonian fluids are described by the power-law model. Three different computational methods are employed, namely a semi-implicit Chorin projection method (SICPM), an explicit algorithm based on fourth-order Runge–Kutta method (ERKM) and a Lattice Boltzmann method (LBM). The aim of the work is to investigate on the capabilities of the LBM for the solution of complex flows through the comparison with traditional computational methods. In the range of Reynolds number investigated, excellent agreement with the literature results is found. In particular, the LBM is found to be accurate in the prediction of the fluid flow behavior for the problem under consideration.

ACS Style

Giovanni Di Ilio; D. Chiappini; G. Bella. A comparison of numerical methods for non-Newtonian fluid flows in a sudden expansion. International Journal of Modern Physics C 2016, 27, 1650139 .

AMA Style

Giovanni Di Ilio, D. Chiappini, G. Bella. A comparison of numerical methods for non-Newtonian fluid flows in a sudden expansion. International Journal of Modern Physics C. 2016; 27 (12):1650139.

Chicago/Turabian Style

Giovanni Di Ilio; D. Chiappini; G. Bella. 2016. "A comparison of numerical methods for non-Newtonian fluid flows in a sudden expansion." International Journal of Modern Physics C 27, no. 12: 1650139.

Conference paper
Published: 01 January 2016 in INTERNATIONAL CONFERENCE OF NUMERICAL ANALYSIS AND APPLIED MATHEMATICS 2015 (ICNAAM 2015)
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In this paper, a self-made numerical model of a high temperature polymer electrolyte membrane fuel cell is presented. In particular, the experimental activity has been addressed to the impact on cell performance of the CO content in the anode gas feeding, for the whole operating range, and a numerical code has been implemented and validated against these experimental results. The proposed numerical model employs a zero-dimensional framework coupled with a semi-empirical approach, which aims at providing a smart and flexible tool useful for investigating the membrane behavior under different working conditions. Results show an acceptable agreement between numerical and experimental data, confirming the potentiality and reliability of the developed tool, despite its simplicity.

ACS Style

Raffaello Cozzolino; Daniele Chiappini; L. Tribioli. A numerical model for CO effect evaluation in HT-PEMFCs: Part 1 - Experimental validation. INTERNATIONAL CONFERENCE OF NUMERICAL ANALYSIS AND APPLIED MATHEMATICS 2015 (ICNAAM 2015) 2016, 1738, 270005 .

AMA Style

Raffaello Cozzolino, Daniele Chiappini, L. Tribioli. A numerical model for CO effect evaluation in HT-PEMFCs: Part 1 - Experimental validation. INTERNATIONAL CONFERENCE OF NUMERICAL ANALYSIS AND APPLIED MATHEMATICS 2015 (ICNAAM 2015). 2016; 1738 ():270005.

Chicago/Turabian Style

Raffaello Cozzolino; Daniele Chiappini; L. Tribioli. 2016. "A numerical model for CO effect evaluation in HT-PEMFCs: Part 1 - Experimental validation." INTERNATIONAL CONFERENCE OF NUMERICAL ANALYSIS AND APPLIED MATHEMATICS 2015 (ICNAAM 2015) 1738, no. : 270005.

Conference paper
Published: 01 January 2016 in INTERNATIONAL CONFERENCE OF NUMERICAL ANALYSIS AND APPLIED MATHEMATICS 2015 (ICNAAM 2015)
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In this paper, a self-made numerical model of a high temperature polymer electrolyte membrane fuel cell is presented. In particular, we focus on the impact of CO poisoning on fuel cell performance and its influence on electrochemical modelling. More specifically, the aim of this work is to demonstrate the effectiveness of our zero-dimensional electrochemical model of HT-PEMFCs, by comparing numerical and experimental results, obtained from two different commercial membranes electrode assemblies: the first one is based on polybenzimidazole (PBI) doped with phosphoric acid, while the second one uses a PBI electrolyte with aromatic polyether polymers/copolymers bearing pyridine units, always doped with H 3 PO 4. The analysis has been carried out considering both the effect of CO poisoning and operating temperature for the two membranes above mentioned.

ACS Style

Raffaello Cozzolino; Daniele Chiappini; L. Tribioli. A numerical model for CO effect evaluation in HT-PEMFCs: Part 2 - Application to different membranes. INTERNATIONAL CONFERENCE OF NUMERICAL ANALYSIS AND APPLIED MATHEMATICS 2015 (ICNAAM 2015) 2016, 1738, 270006 .

AMA Style

Raffaello Cozzolino, Daniele Chiappini, L. Tribioli. A numerical model for CO effect evaluation in HT-PEMFCs: Part 2 - Application to different membranes. INTERNATIONAL CONFERENCE OF NUMERICAL ANALYSIS AND APPLIED MATHEMATICS 2015 (ICNAAM 2015). 2016; 1738 ():270006.

Chicago/Turabian Style

Raffaello Cozzolino; Daniele Chiappini; L. Tribioli. 2016. "A numerical model for CO effect evaluation in HT-PEMFCs: Part 2 - Application to different membranes." INTERNATIONAL CONFERENCE OF NUMERICAL ANALYSIS AND APPLIED MATHEMATICS 2015 (ICNAAM 2015) 1738, no. : 270006.