Search results for " rene."
showing 10 items of 258 documents
Wave Energy Assessment around the Aegadian Islands (Sicily)
2019
This paper presents the estimation of the wave energy potential around the Aegadian islands (Italy), carried out on the basis of high resolution wave hindcast. This reanalysis was developed employing Weather Research and Forecast (WRF) and WAVEWATCH III ® models for the modelling of the atmosphere and the waves, respectively. Wave climate has been determined using the above-mentioned 32-year dataset covering the years from 1979 to 2010. To improve the information about wave characteristics regarding spatial details, i.e., increasing wave model resolution, especially in the nearshore region around the islands, a SWAN (Simulating WAves Nearshore) wave propagation model was used. Results obtai…
Nexus Water & Energy: A Case Study of Wave Energy Converters (WECs) to Desalination Applications in Sicily
2016
The recent studies about interactions among energy and water are considered as a new field of research. As almost all energy generation processes require significant amounts of water, and water requires energy for treatment and transport, so these two resources are inextricably linked. The main aim of this work is a presentation of the use of renewable energy for desalination plants in Sicily: in particular exploitation of wave energy into electrical energy necessary for water treatment. Desalination is the most energy intensive water treatment technology but it could be solution for many problems in water supply for areas with chronic debt of water. In this study we find three section: in …
DC/DC converter topologies for electrolyzers: State-of-the-art and remaining key issues.
2017
In recent years, the use of electrolyzers to produce cleanly and efficiently hydrogen from renewable energy sources (i.e. wind turbines, photovoltaic) has taken advantage of a growing interest from researchers and industrial. Similarly to fuel cells, DC/DC converters are needed to interface the DC bus with the electrolyzer. Usually, electrolyzers require a low DC voltage to produce hydrogen from water. For this reason, a DC/DC buck converter is generally used for this purpose. However, other DC/DC converter topologies can be used depending on the feature of the electrolyzer and electrical grid as well. The main purpose of this paper is to present the current state-of-the-art of DC/DC conver…
Sustainable Approach to Waste-Minimized Sonogashira Cross-Coupling Reaction Based on Recoverable/Reusable Heterogeneous Catalytic/Base System and Ace…
2016
In this contribution, we present a chemically efficient and sustainable protocol for the palladium-catalyzed copper-free Sonogashira cross-coupling reaction, based on the use of a heterogeneous catalytic system. This consists in the combination of a palladium catalyst on highly cross-linked thiazolidine network on silica and a polystyrene-supported base. The solid catalyst/base system acts as a palladium scavenger avoiding leaching of the metal and consequent product contamination. The reaction can be conducted in safe and easily recoverable acetonitrile/water azeotrope as reaction medium. This proved to be an efficient greener alternative to the classic toxic aprotic media commonly used in…
Ville et fortifications : de l'héritage à la production du territoire urbain
2015
A large number of french cities host military historical edifices (citadels, barracks, bastions, defensive walls, etc.). Although their initial defensive functions have been lost over time, these edifices remain deeply rooted in the urban fabric of their host cities. They continue exerting an impact on these cities’ urban morphology and modern-time functions as well as the way in which the concept of city is understood. Cities nowadays face some new challenges,the increasing awareness of urban sprawl and its consequences, coupled with an urge to promote a renewed and sustainable urbanism, invites us to adopt new approaches to study urban fortifications. In addition to their symbolic aspect,…
Sea wave energy to produce Hydrogen for public transport in Trapani (Italy)
2016
The coupling of renewable energy and hydrogen technologies represents in the mid term a very interesting way to match the tasks of increasing the reliable exploitation of wind and sea wave energy introducing clean technologies in the transportation sector. This paper presents a feasibility study of two plants for the production, storage and distribution of hydrogen for Public transportation facilities in the West Sicily. In these plants the energy needs for the process is generated by a wind farm and/or a sea wave farm. All the buses will be equipped with a fuel-cell. A first economic analysis is presented together with the assessment of the avoidable greenhouse gas emissions during the ope…
Rigenerazione di aree produttive dismesse nel territorio della Val Chisone in Piemonte. L’ex setificio Gütermann di Perosa Argentina
2017
Il paper presenta i risultati parziali di un’attività di ricerca che l’autrice sta svolgendo in Piemonte nell’ambito del Bando Talenti della Società Civile promosso dalla Fondazione Giovanni Goria e dalla Fondazione CRT, cofinanziato dall’associazione spagnola INCUNA (Industria, Cultura, Naturaleza) di Gijón. La ricerca riguarda le tematiche della rigenerazione partecipata delle aree produttive dismesse come risorsa per lo sviluppo territoriale. L’articolo si focalizza sul territorio della Val Chisone, situato nella provincia torinese e a stretto contatto con la realtà transfrontaliera. La ricerca pone l’attenzione sull’analisi delle peculiarità di questa valle che grazie alla sua posizione…
Rigenerazione urbana e pratiche urbane microspaziali
2017
Nello scenario post-crisi attuale, che ha visto la sensibile riduzione delle risorse pubbliche per i progetti di rigenerazione urbana, in molte realtà urbane italiane e non solo, stiamo assistendo alla crescita di una serie di pratiche urbane micro-spaziali che stanno ridisegnando gli spazi urbani. Si tratta di esperienze che diversi studiosi hanno definito come "insurgent", "do-it-yourself" (DIY), "guerrilla", "everyday", "participatory" e/o "grassroots" urbanism (Haydn and Temel, 2006; Borasi and Zardini, 2008; Chase et al., 2008; Burnham, 2010; Hou, 2010; Zeiger, 2011a) e che si caratterizzano per una capacità proattiva che sfida gli approcci tradizionali delle politiche urbane e le loro…
Sustainable technologies for greenhouse systems
2020
The greenhouse cultivation system in European countries represents one of the most energy-intensive sectors in the agriculture and agro-industry sector. In this regard, renewable energies represent an innovative solution to reduce energy costs and environmental impacts. Both, the energy demands and the economic aspects are analyzed with regard to the main energy users, i.e.: heating and cooling systems, lighting and pumping for irrigation. This work considers the use of solar photovoltaic and thermal energy. The use of semi-closed greenhouses is also considered.
Vēstures procesa izpratne Nikolo Makjavelli darbos
2018
Maģistra darbs "Vēstures procesa izpratne Nikolo Makjavelli darbos" ir veltīts vēstures teorijas jautājumiem Nikolo Makjavelli sacerējumos. Pētījuma ietvaros tiek analizēti Makjavelli nozīmīgākie darbi - "Pārdomas par Tita Līvija pirmo dekādi", "Valdnieks" un "Florences vēsture". Pētījuma mērķis ir atspoguļot un analizēt Nikolo Makjavelli darbos paustās idejas par vēstures procesu un to ietekmējošajiem faktoriem. Darba ievadošajā nodaļā ir sniegts ieskats Nikolo Makjavelli biogrāfijā, kā arī Itālijas reģiona un Florences republikas politiskajās un kulturālajās norisēs. Otrajā nodaļā tiek aplūkotas Nikolo Makjavelli politiskās un sociālās idejas. Trešajā nodaļā tiek analizēta metafizisko asp…