Littérature scientifique sur le sujet « Electric power distribution – Sicily (Italy) »
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Articles de revues sur le sujet "Electric power distribution – Sicily (Italy)"
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La Guardia, Marcello, Filippo D’Ippolito et Maurizio Cellura. « Construction of a WebGIS Tool Based on a GIS Semiautomated Processing for the Localization of P2G Plants in Sicily (Italy) ». ISPRS International Journal of Geo-Information 10, no 10 (2 octobre 2021) : 671. http://dx.doi.org/10.3390/ijgi10100671.
Texte intégralRésumé :
The recent diffusion of RES (Renewable Energy Sources), considering the electric energy produced by photovoltaic and wind plants, brought to light the problem of the unpredictable nature of wind and solar energy. P2G (Power to Gas) implementation seems to be the right solution, transforming curtailed energy in hydrogen. The choice of the settlement of P2G plants is linked to many factors like the distances between the gas grid and the settlement of RES plants, the transportation networks, the energy production, and population distribution. In light of this, the implementation of a Multi-Criteria Analysis (MCA) into a Geographic Information System (GIS) processing represents a good strategy to achieve the goal in a specific territorial asset. In this work, this method has been applied to the case of study of Sicily (Italy). The paper shows in detail the geomatic semi-automated processing that allows to find the set of possible solutions and further to choose the best localization for new P2G plants, connected to a Relational Database Management System (RDBMS) and integrated with a WebGIS visualization for real-time analysis. This system is useful for the management, the development, and the study of hydrogen technologies, in order to link the electrical network and the gas network datasets with economical and infrastructural assets through GIS processing. In the future new factors will join in the process as policies on hydrogen take shape.
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La Scalia, Giada, Luca Adelfio, Concetta Manuela La Fata et Rosa Micale. « Economic and Environmental Assessment of Biomass Power Plants in Southern Italy ». Sustainability 14, no 15 (5 août 2022) : 9676. http://dx.doi.org/10.3390/su14159676.
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In 2019, Europe adopted the New Green Deal as a strategic plan to become a competitive, resource-efficient, and driven economy by reducing its gas emissions and carbon footprint. Due the COVID-19 pandemic, this strategic plan was recently updated to expedite the green transition of European industries. Therefore, the present paper deals with the problem of deciding an appropriate size for a biomass plant that directly produces electric energy by means of two different conversion processes: combustion and gasification. After an initial estimation of the energy potential in western Sicily, GIS data of biomass growth were used to identify the appropriate size for the power plants under investigation. The economic feasibility of biomass utilization was evaluated over a capacity range of 10 to 30 MW, considering total capital investments, revenues from energy sales, and total operating costs. Moreover, the effect of variations on incentive prices was analyzed by means of a sensitivity analysis. Comparing the different plant solutions considered, the environmental sustainability was also analyzed using the life cycle assessment (LCA) approach. The results showed that the combustion solution had a higher profitability and a lower environmental impact for each plant size. The obtained results also demonstrated that providing power from residual biomass in small agricultural communities would significantly reduce their environmental impacts while improving the economic feasibility of their waste management practices.
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Viola, F., L. V. Noto, M. Cannarozzo et G. La Loggia. « Regional flow duration curves for ungauged sites in Sicily ». Hydrology and Earth System Sciences 15, no 1 (25 janvier 2011) : 323–31. http://dx.doi.org/10.5194/hess-15-323-2011.
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Abstract. Flow duration curves are simple and powerful tools to deal with many hydrological and environmental problems related to water quality assessment, water-use assessment and water allocation. Unfortunately the scarcity of streamflow data enables the use of these instruments only for gauged basins. A regional model is developed here for estimating flow duration curves at ungauged basins in Sicily, Italy. Due to the complex ephemeral behavior of the examined region, this study distinguishes dry periods, when flows are zero, from wet periods using a three parameters power law to describe the frequency distribution of flows. A large dataset of streamflows has been analyzed and the parameters of flow duration curves have been derived for about fifty basins. Regional regression equations have been developed to derive flow duration curves starting from morphological basin characteristics.
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Viola, F., L. V. Noto, M. Cannarozzo et G. La Loggia. « Regional flow duration curves for ungauged sites in Sicily ». Hydrology and Earth System Sciences Discussions 7, no 5 (20 septembre 2010) : 7059–78. http://dx.doi.org/10.5194/hessd-7-7059-2010.
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Abstract. Flow duration curves are simple and powerful tools to deal with many hydrological and environmental problems related to water quality assessment, water-use assessment and water allocation. Unfortunately the scarcity of streamflow data enables the use of these instruments only for gauged basins. A regional model is developed here for estimating flow duration curves at ungauged basins in Sicily, Italy. Due to the complex ephemeral behaviour of the examined region, this study distinguishes dry periods, when flows are zero, from wet periods using a three parameters power law to describe the frequency distribution of flows. A large dataset of streamflows has been analysed and the parameters of flow duration curves have been derived for about fifty basins. Regional regression equations have been developed to derive flow duration curves starting from morphological basin characteristics.
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Carollo, Francesco Giuseppe, Alessio Nicosia, Vincenzo Palmeri, Vincenzo Pampalone, Maria Angela Serio et Vito Ferro. « Measuring Rainfall Kinetic Power in Two Sicilian Experimental Areas by Drop-Size Distribution Data ». Land 12, no 2 (5 février 2023) : 418. http://dx.doi.org/10.3390/land12020418.
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The rainfall kinetic energy, which affects soil erosion processes, can be calculated by the drop-size distribution (DSD) and falling velocity. This study presents the outcomes derived by the DSDs recorded with the same optical disdrometer in two experimental areas, located in Sicily (southern Italy). Specifically, the DSDs were recorded from March 2017 to December 2019 at Sparacia and from June 2006 to April 2014 at Palermo. The aims of this paper are both to compare the DSDs for the two sites and to evaluate the applicability of Gamma theoretical distribution. Moreover, the relations of rainfall kinetic power vs. rainfall intensity are assessed. Differences in DSDs, especially for rainfall intensity I lower than 100 mm h−1, are detected, while they are less evident for the highest I values. The kinetic power per unit volume of rainfall varies between the two sites and can be considered roughly coincident only for I higher than 100 mm h−1. The observed kinetic power-rainfall intensity relations are not well described by the equations by Wischmeier and Smith and Brown and Foster. Finally, the reliability of a theoretical relationship for estimating the kinetic power by I and the median volume diameter D0 is positively tested for the Palermo dataset, while it is found to be reliable only for D0 greater than 0.17 cm for the Sparacia dataset.
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Salvati, P., C. Bianchi, M. Rossi et F. Guzzetti. « Societal landslide and flood risk in Italy ». Natural Hazards and Earth System Sciences 10, no 3 (16 mars 2010) : 465–83. http://dx.doi.org/10.5194/nhess-10-465-2010.
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Abstract. We assessed societal landslide and flood risk to the population of Italy. The assessment was conducted at the national (synoptic) and at the regional scales. For the assessment, we used an improved version of the catalogue of historical landslide and flood events that have resulted in loss of life, missing persons, injuries and homelessness in Italy, from 1850 to 2008. This is the recent portion of a larger catalogue spanning the 1941-year period from 68 to 2008. We started by discussing uncertainty and completeness in the historical catalogue, and we performed an analysis of the temporal and geographical pattern of harmful landslide and flood events, in Italy. We found that sites affected by harmful landslides or floods are not distributed evenly in Italy, and we attributed the differences to different physiographical settings. To determine societal risk, we investigated the distribution of the number of landslide and flood casualties (deaths, missing persons, and injured people) in Italy, and in the 20 Italian Regions. Using order statistics, we found that the intensity of a landslide or flood event – measured by the total number of casualties in the event – follows a general negative power law trend. Next, we modelled the empirical distributions of the frequency of landslide and flood events with casualties in Italy and in each Region using a Zipf distribution. We used the scaling exponent s of the probability mass function (PMF) of the intensity of the events, which controls the proportion of small, medium, and large events, to compare societal risk levels in different geographical areas and for different periods. Lastly, to consider the frequency of the events with casualties, we scaled the PMF obtained for the individual Regions to the total number of events in each Region, in the period 1950–2008, and we used the results to rank societal landslide and flood risk in Italy. We found that in the considered period societal landslide risk is largest in Trentino-Alto Adige and Campania, and societal flood risk is highest in Piedmont and Sicily.
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HERTACH, THOMAS. « Spectacular song pattern from the Sicilian Mountains : The new cicada species Cicadetta anapaistica sp. n. (Hemiptera : Cicadidae) ». Zootaxa 2771, no 1 (22 février 2011) : 25. http://dx.doi.org/10.11646/zootaxa.2771.1.3.
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Acoustic investigations of Cicadetta montana s. l. have revealed the presence of morphologically cryptic species in the last few years. This work describes the new cicada Cicadetta anapaistica sp. n. which was detected in the Madonie and Nebrodi Mountains (Italy, Sicily). The characteristic and sophisticated song is composed of three phrases, modulated on four typical power levels and three frequency ranges. The song pattern is compared with those of the closely related Cicadetta cerdaniensis and Cicadetta cantilatrix. Quantitative and even qualitative intraspecific differences of the song structure among individuals exist which appear to allow individual-specific recognition in many cases. As in other species of the complex, reliable morphological differences between the new species and others in the complex have not been found. The species is currently only known to be endemic to forest and ecotone habitats in a small mountain range. Because of this limited distribution the species is likely to be vulnerable to habitat and climate changes.
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Mauriello, Paolo, et Domenico Patella. « Localization of maximum‐depth gravity anomaly sources by a distribution of equivalent point masses ». GEOPHYSICS 66, no 5 (septembre 2001) : 1431–37. http://dx.doi.org/10.1190/1.1487088.
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A method is proposed for localizing the maximum depth sources of a gravity anomaly data set collected on a generally uneven, free surface topography. First, the Newtonian‐type integral defining the Bouguer anomaly function is solved as a sum of elementary contributions from pointlike mass contrast (Δ‐mass) elements. Using this solution, the power associated with the Bouguer effect is derived as a sum of crosscorrelation integrals between the Bouguer anomaly data function and a scanner function expressing the gravity effect from a pointlike Δ‐mass element. Finally, applying Schwarz’s inequality to a single crosscorrelation power term, a Δ‐mass occurrence function is introduced as a suitable tool for localizing the maximum‐depth sources (MDS) of a given gravity anomaly field. The MDS localization procedure consists of scanning the half‐space below the survey area by a unit strength Δ‐mass element and calculating the Δ‐mass occurrence function at the nodes of a 3‐D regular grid. The grid values exceeding in modulus a prefixed threshold can be contoured to single out the zones underground where the Δ‐mass occurrence function shows the highest values. These zones are interpreted as the equivalent MDS pattern for the observed gravity field. Synthetic examples demonstrate that the MDS localization approach is a powerful tool especially suited for analyzing unconstrained gravity data. In the case of an isometric source body, we show that the maximum depth of the equivalent point mass virtually coincides with the position of the actual source center. In the case where the source is not isometric, besides giving the maximum depth of the equivalent point mass, the method also allows obtaining useful information on the upper limit for the source depth. An application to a real case in the field of volcanology (Mt. Etna volcano, Sicily, Italy) is finally presented and discussed.
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Cardona, E., et A. Piacentino. « A Validation Methodology for a Combined Heating Cooling and Power (CHCP) Pilot Plant ». Journal of Energy Resources Technology 126, no 4 (1 décembre 2004) : 285–92. http://dx.doi.org/10.1115/1.1803849.
Texte intégralRésumé :
A great number of variables significantly influence the energetic, environmental and economic results of CHP (Combined Heating and Power) and CHCP (Combined Heating Cooling and Power) plants operation, and as a consequence their project activity is rather complex. In order to select the best layout and properly size the machines, detailed data on hourly electric, thermal, and cooling demand are necessary, so that a series of plant life cycle simulations may have to be carried out. Unfortunately, such detailed data are rarely available, because energy consumptions data for existing buildings are usually derived from aggregated monthly or bimonthly gas and electricity bills. Even more difficulties are encountered for new types of buildings, for which no consumptions data are available. In such cases, the most common procedure consists in performing, using case-oriented criteria, an estimate of the thermal and cooling consumption levels, and to refine it during construction, if necessary. This is the case of an existing medium size CHCP pilot plant for office buildings that covers the electrical, thermal, and cooling loads of two office buildings situated in a Mediterranean area (Palermo, Sicily, Italy). Estimated demand profiles were used; the effect on thermal demand of the conversion of the cooling load into thermal one through an absorption chiller was assessed. This is a very significant aspect in all warm climates zones. Cumulative curves were obtained for the aggregate thermal demand, by summing the heat direct applications and the heat consumptions for feeding the absorption chiller. In this paper the existing plant was compared with other plant configurations, varying both for machine sizes and management criterion, in order to affirm whether or not the plant selected by the designer in a simplified manner was or not an appropriate solution. The comparison was performed from an energetic and economic viewpoint.
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Pampalone, Vincenzo, Francesco Giuseppe Carollo, Alessio Nicosia, Vincenzo Palmeri, Costanza Di Stefano, Vincenzo Bagarello et Vito Ferro. « Measurement of Water Soil Erosion at Sparacia Experimental Area (Southern Italy) : A Summary of More than Twenty Years of Scientific Activity ». Water 14, no 12 (11 juin 2022) : 1881. http://dx.doi.org/10.3390/w14121881.
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The main purpose of this article is to give a general idea of the scientific activity that was carried out starting from the 2000s on the basis of the data collected in the plots installed at the Sparacia experimental station for soil erosion measurement in Sicily, South Italy. The paper includes a presentation of the experimental site, a description of the methods and procedures for measuring soil erosion processes both available in the literature and applied at the Sparacia station (sediment sampling and water level reading in the storage tanks for total erosion measurements; profilometer, and Structure from Motion technique for rill erosion measurements), and the main results obtained in the monitoring period in the experimental site. The latter concern the effects of plot size and steepness on soil loss, the measurement variability, the frequency analysis of soil loss, the rill erosion characterization, and the comparison between rill and interrill erosion rates. Each of these topics is addressed with multi-temporal analyses performed with increasing size of the available database, which allowed to draw robust conclusions. Soil loss did not vary appreciably with plot length in contrast with the assumption made in the USLE/RUSLE. The variability of the measurements of soil loss, runoff volume, and sediment concentration at the event scale in replicated plots decreased as the mean measured value increased. The normalized event soil loss was distributed according to a two-component distribution. A power relationship between rill volumes and lengths was established. The measurements also confirmed the morphological similarity between the channels of the rills and ephemeral gullies described by a power dimensionless relationship. Rill erodibility of the sampled clay soil varied over time, maintaining relatively low values. Finally, rill erosion was dominant relative to interrill erosion, and a more efficient sediment transport system through the rill network occurred as plot steepness increased.
Thèses sur le sujet "Electric power distribution – Sicily (Italy)"
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Scarsi, Gian Carlo. « Electricity distribution in Italy : microeconomic efficiency analysis of local distributing units with methodological cross-checking ». Thesis, University of Oxford, 1998. http://ora.ox.ac.uk/objects/uuid:ca322a0b-7fd0-4a02-a237-bb4b6f02eeda.
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This thesis analyses technical efficiency of local electricity distribution in Italy (1994, 1996) by using both econometric (deterministic frontier, stochastic frontier) and linear programming (Data Envelopment Analysis) tools. Cross-sectional data was examined with respect to (a) ENEL - the Italian electricity monopolist whose restructuring and privatisation is now under way - and its local distribution branches (Chapters 2, 3, and 5); (b) municipal authorities (MUNIs), i.e. town-based electric utilities which sometimes hold franchises for electricity distribution within city limits (Chapters 4 and 5). Estimation results from Chapters 2 and 3 highlighted non-exhaustion of scale economies at sample-mean values. Scope economies between medium and low-voltage distribution were also detected (Ch. 2). Efficiency score series stemming from both econometric and linear programming techniques in Chapters 3 and 5 showed that Southern distributors were relatively under-represented among top units even after allowing for several exogenous environmental variables. The external effects which proved to influence technical efficiency in electricity distribution were consumer density, the percentage of industrial customers, the geographical nature of areas served (metropolitan areas, mountains, etc.), and the interaction between ENEL's units and municipal utilities in those towns featuring ENEL and MUNIs bordering each other. Pooled ENEL-MUNI analysis from Chapter 4 failed to spot any systematic superiority of ENEL's units over municipalities. Generalisation on the ENEL-MUNI efficiency dispute was then discarded, in favour of case-by-case comparison. Paired-samples statistical testing (both parametric and non-parametric) from Chapter 5 showed limited agreement between Stochastic Frontier Estimation (SFE) and Data Envelopment Analysis (DEA) efficiency outcomes. Statistical concordance was more often found when comparing SFE and DEA models sharing the same input-output specification. Again, no apparent superiority of ENEL over MUNIs was found out by DEA linear programs. One-to-one comparisons confirmed that the outcomes were mixed, with ENEL's local branches outperforming MUNIs in metropolitan and (sometimes) rural areas, and MUNIs faring better in medium-sized, Po Valley towns (Northern Italy). Results were not clear-cut for Alpine and rural distributors. The latter however - should be considered on a separate basis in that they will probably need permanent subsidies to meet universal service obligations, irrespective of the future structure of electricity distribution in Italy. Comparable (e.g., urban) units might - on the other hand - be subject to yardstick regulation based upon DEA's 'efficient peer' outcomes. Apart from the main empirical work, this thesis also features institutional and theoretical overviews (Chapters 2 to 5) with relevant literature surveys, a DEA Numerical Appendix (Chapter 5), and a regional map of the Italian territory (end of thesis).
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DI, GREGORIO Giuseppa. « La nascita e lo sviluppo di un sistema elettrico in Sicilia dalla fine dell'ottocento alla II guerra mondiale ». Doctoral thesis, 1991. http://hdl.handle.net/1814/5747.
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Defence date: 24 June 1991Examining board: Prof. Giuseppe Barone ; Prof. Albert Carreras ; Prof. Peter Hertner (supervisor) ; Prof. Giorgio Mori ; Prof. Henri Morsel
PDF of thesis uploaded from the Library digitised archive of EUI PhD theses completed between 2013 and 2017
Livres sur le sujet "Electric power distribution – Sicily (Italy)"
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Italy) International Conference on Electric Power Engineering (2003 Bologna. 2003 IEEE Bologna PowerTech : Conference proceedings : June 23-26, 2003, Faculty of Engineering, University of Bologna, Bologna, Italy. Piscataway, NJ : IEEE, 2003.
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Madnick, Stuart, Oliver Kramer, Wei Lee Woon et Zeyar Aung. Data Analytics for Renewable Energy Integration : 4th ECML PKDD Workshop, DARE 2016, Riva del Garda, Italy, September 23, 2016, Revised Selected Papers. Springer, 2017.
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Bosisio, Alessandro, Samuele Grillo, Andrea Morotti, Enea Bionda, Francesca Soldan et Gaetano Iannarelli. « Analysis of fault data in urban electric distribution grids : lesson learned from Milan, Italy ». Dans 2022 International Symposium on Power Electronics, Electrical Drives, Automation and Motion (SPEEDAM). IEEE, 2022. http://dx.doi.org/10.1109/speedam53979.2022.9842024.
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Ciani, A., L. Tay-Wo-Chong, A. Amato, E. Bertolotto et G. Spataro. « Hydrogen Blending Into Ansaldo Energia AE94.3A Gas Turbine : High Pressure Tests, Field Experience and Modelling Considerations ». Dans ASME Turbo Expo 2021 : Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2021. http://dx.doi.org/10.1115/gt2021-58650.
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Abstract Fuel flexibility in gas turbine development has become increasingly important and modern engines need to cope with a broad variety of fuels. The target to operate power plants with hydrogen-based fuels and low emissions will be of paramount importance in a future focusing on electric power decarbonization. Ansaldo Energia AE94.3A engine acquired broad experience with operation of various natural gas and hydrogen fuel blends, starting in 2006 in the Brindisi (Italy) power plant. Based on the exhaustive experience acquired in the field, this paper describes the latest advancements characterizing the operation of the AE94.3A burner with high pressure combustion tests adding hydrogen blends ranging from 0 to 40% in volume. The interpretation of the test results is supported by reactive and non-reactive simulations describing the effects of varying fuel reactivity on the flame structure as well as the impact of fuel / air momentum flux ratio on the fuel / air interaction and fuel distribution in the combustion chamber. As expected, increasing amounts of hydrogen in the fuel are also associated with higher amounts of NOx production, however this effect could be countered by optimization of the fuel staging strategy, based on the mentioned CFD considerations and feedback from high pressure tests.