Search results for "DF"
showing 10 items of 1699 documents
Formation Of perched leachate zones in MSW landfill
2010
The paper presents a 1D mathematical model for the simulation of the percolation fluxes throughout a landfill for municipal solid waste (MSW). Specifically, the model is based on mass balance equations, that enable one to simulate the formation of perched leachate zones in a landfill for MSW. The model considers the landfill divided in several layers evaluating the in and out flow throughout each layer as well as the continuous moisture distribution. The infiltration flow is evaluated by means of the Darcy’s law for an unsaturated porous medium, while the moisture distribution evaluation has been carried out on the basis of the theory of the vertically distributed unsaturated flow. The solu…
Mathematical modelling of biogas from municipal solid waste landfil
2016
Sanitary landfills for municipal solid wastes can be considered as large biological reactors where the organic fraction of municipal solid waste undergoes anaerobic digestion producing gas and liquid emissions. Leachate production from municipal sanitary landfills is currently recognized as a major environmental burden associated with municipal solid waste management and it may be responsible for local pollution of groundwater and soil. Moreover, the fate of the organic compounds within the landfill body is of primary importance since it directly influences the production of landfill gas. The aim of the paper is to propose an integrated mathematical model able to simulate, on one hand, the …
Menzione d'Onore Borgo Vecchio Factory
2018
Il Premio Compasso d’Oro ADI è il massimo riconoscimento italiano al progetto, al prodotto, alla ricerca di disegno industriale. È stato istituito a Milano nel 1954 dai grandi magazzini la Rinascente per incentivare l’“estetica del prodotto” e il nascente design italiano. Il marchio del premio, che fa riferimento al compasso di Adalbert Göringer e alla proporzione aurea, è stato disegnato dal grafico Albe Steiner, mentre il compasso d’oro tridimensionale è a firma degli architetti Alberto Rosselli e Marco Zanuso. Nel 1958 il premio è stato ceduto da la Rinascente all’ADI Associazione per il Disegno Industriale, che ogni due anni ne cura l’organizzazione attraverso le selezioni di una giuria…
Borgo Vecchio Factory
2016
ADI Design Index è la selezione annuale del miglior design italiano ed è parte integrante del sistema di selezione del Premio Compasso d’Oro ADI: ogni anno, grazie all’Osservatorio Permanente del Design ADI – un gruppo di lavoro costituito da oltre cento esperti, anche esterni all’associazione – prende in esame su tutto il territorio italiano il design dei nuovi prodotti messi in produzione. Dopo una strutturata selezione (commissioni territoriali, tematiche e comitato di selezione finale), i migliori prodotti di design vengono presentati, con un commento critico che evidenzia i motivi della scelta, su ADI Design Index. I volumi diventano la base su cui lavora la giuria internazionale del C…
First proposal of a methodology for a preventive assessment of the acoustic impact of advanced landfills
2005
In this paper, the results of a preliminary study on the environmental noise pollution of a technologically advanced landfill to be realized in Sicily (Italy) are presented. The investigation has been carried out analysing, at the beginning, a simulating model suggested by the European Community. The method makes reference to the ISO 9613-2:1996 standard, which suggests a general method of calculation to assess the attenuation of sound during propagation outdoors. The simulation has pointed out the troubles in carrying out the noise pollution assessment of an advanced landfill, where several and different kinds of sound sources are present at the same time; it isn’t always possible, for exa…
SVILUPPO DI UN SISTEMA DI ENERGY HARVESTING DALLA PIOGGIA
2014
HARVESTING DALLE PRECIPITAZIONI
2013
ENERGIA ELETTRICA DALLE PRECIPITAZIONI
2013
Fundamental Analysis of Grid-Forming Converters Enhanced with Feedforward Controls
2022
The grid-forming control for power converters can be enhanced by proper feedforward terms included in the active power control loop. Two basic structures are identified, the feedforward angle and the feedforward frequency. The formal analysis of the transfer functions reveals a structural similarity. The two schemes exhibit however a fundamental difference in their transient capabilities. The grid-forming controls are characterized with the introduction of two specific factors, for the direct assessment of the inertia and the damping which can be provided by the grid-forming converter. The sensitivity analysis of the two feedforward schemes indicates that the enhancement of the transient pe…
Adaptive Feed-Forward Neural Network for Wind Power Delivery
2022
This paper describes a grid connected wind energy conversion system. The interconnecting filter is a simple inductor with a series resistor to minimize three-phase current Total Harmonic Distortion (THD). Using the Recursive Least Squares (RLS) Estimator, an online grid impedance technique is proposed in the stationary reference frame using the Recursive Least Squares (RLS) Estimator. An Adaptive Feedforward Neural (AFN) Controller has also been developed using the inverse of the system to improve the performance of the current Proportional-Integral controller under dynamical conditions and provide better DC link voltage stability. The neural network weights are computed in real-time using …