Search results for "efficiency"
showing 10 items of 1430 documents
The upgraded ISOLDE yield database – A new tool to predict beam intensities
2020
At the CERN-ISOLDE facility a variety of radioactive ion beams are available to users of the facility. The number of extractable isotopes estimated from yield database data exceeds 1000 and is still increasing. Due to high demand and scarcity of available beam time, precise experiment planning is required. The yield database stores information about radioactive beam yields and the combination of target material and ion source needed to extract a certain beam along with their respective operating conditions. It allows to investigate the feasibility of an experiment and the estimation of required beamtime. With the increasing demand for ever more exotic beams, needs arise to extend the functi…
Direct electrochemical detosylation of tetratosylcyclen to cyclen with carbon cathodes
2005
The electrochemical detosylation of tetratosylcyclen to cyclen (1,4,7,10-tetraazacyclododecane) in aprotic solvents at a carbon cathode was investigated both in a bench-scale batch electrochemical reactor and in a continuous batch recirculation reaction system equipped with a parallel-plate electrochemical cell. Yields and faradaic efficiency in cyclen, respectively, of 80 and 55% were obtained in the bench-scale reactor working in acetonitrile. It was found that the faradaic efficiency in cyclen depends on the competition between the reduction of the tetratosylcyclen and parasitic processes as the reduction of the tetraalkylammonium cations present in the supporting electrolyte. We have ob…
Impact of the environmental taxes on reduction of emission from transport in Latvia
2021
Transport has a significant contribution to climate change and many post-Soviet republics, including Latvia, struggle to decrease these emissions to reach carbon neutrality by 2050. In this paper, ...
Italy’s North-South Divide Yet Again: Some New Evidence from Firms, Sectors and Territories
2021
The recent literature on the North-South divide in Italy has refuted a homogeneous reading and treatment of the “Southern question” and has recalled the importance of deep intra-South disparities. This paper contributes to this line of research, offering some descriptions of intra-South disparities. We first make use of data at the firm level pertaining to the manufacturing sector between 2008 and 2019 to show how productive units differ within each macro-area according to their main balance-sheet indicators and to technical efficiency, both in terms of their average and variability. Secondly, we use different data available at the provincial level to assess the territorial disparities exis…
An Electronic Emulator of Combined Photovoltaic and Solar Thermal Systems
2010
An emulator of combined Photovoltaic and Solar Thermal (CPS) systems is presented. In order to carry out early testing on the design of such systems, a - microcontrolled based - hardware board has been designed, implemented and tested. This emulator is able run several typical daily solar irradiation patterns as a function of the seasons and a complete solar thermal and photovoltaic model that depends on a very flexible set of parameters characterizing the real CPS behaviour. By properly varying these parameters many different CPS models can easily be created and tailored to the energy performance needed for a predefined target application. Beside these functionalities, the CPS emulator is …
Carbon efficiency analysis in the provision of drinking water : Estimation of optimal greenhouse gas emissions
2023
Producción Científica
Agroalimentare e sviluppo economico sostenibile: energia, efficienza energetica, ambiente e cibo
2013
Nell’ultimo decennio, il sistema agroalimentare nazionale nella sua accezione più ampia di agricoltura e industria alimentare, ha assunto una configurazione fortemente sistemica, aperta al contributo di diverse discipline e tecnologie. Tale evoluzione ha consentito al sistema agricolo di raggiungere posizioni ragguardevoli se consideriamo che nel complesso l’agroalimentare rappresenta per l’economia italiana un valore di 250 miliardi €, pari a circa 16% del PIL. Il mondo agricolo, nel suo complesso, costituisce ormai uno snodo fondamentale per attività che riguardano: l’energia, l’ambiente, il cibo, il territorio, il benessere dei cittadini, il sistema economico aree urbane-aree rurali. Il …
Integration of green roofs&walls in urban areas
2020
Growing urbanization is associated with the emergence of environmental problems, such as the reduction of natural resources, the atmosphere pollution and the increase of the heat islands phenomenon in cities. The integration of vegetation in the urban areas, through the creation of green hanging systems, represents a possible solution to improve the energy sustainability of buildings, to combat meteoric excesses, to improve stormwater management and to reduce pollutant levels. These energy and environmental benefits are related to the properties of evapotranspiration, shading and thermal insulation of the vegetation. The work reports the results of the main studies concerning the use of han…
Green infrastructures for the energetic and environmental sustainability of cities
2019
The inexorable extension of urbanization is consuming huge amounts of soil drastically reducing natural vegetation, replacing it with buildings and low albedo surfaces. The changes due to the different thermal properties of surface materials and the lack of evapotranspiration in urban areas lead to a phenomenon known as "urban heat island effect". By reintroducing the vegetation back into the urban landscape, a partnership between nature and cities should be strengthened to create a new sustainable urban environment. Since the outer surfaces of building offer a great amount of space for vegetation, planting on roofs and walls has become one of the most innovative way to provide several envi…
Lead acetate precursor based p-i-n perovskite solar cells with enhanced reproducibility and low hysteresis
2015
A low temperature approach for the fabrication of p-i-n perovskite solar cells is presented. Using lead acetate-based precursors, flat and homogeneous CH3NH3PbI3 films, compatible with the use of thin organic charge transport layers, can be obtained. The corresponding solar cells showed power conversion efficiency up to 12.5%, with remarkable reproducibility and very low hysteresis.