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102 results on '"Giglioli, Romano"'

10. Feasibility analysis of a hybrid auxiliary power unit for pleasure boats

Author

Ferrari Lorenzo, Frate Guido Francesco, Giglioli Romano, Girolami Alessia, Pasini Gianluca, and Tocchi Federico

Subjects
Environmental sciences, GE1-350
Abstract

To reduce the pollutant emissions in the naval sector, the use of alternative fuels and new power generator systems are both promising solutions. In this study, the feasibility of replacing a pleasure boat Auxiliary Power Unit (APU) with a hybrid solution is studied from the economic and technical points of view. Several power generation technologies and layouts are considered. Many configurations were investigated, from hybrid battery/diesel generator to innovative layouts including fuel cell with onboard Liquified Natural Gas (LNG) reforming for hydrogen production. Since hybrid APUs may yield significant advantages in terms of both environmental and noise pollution, the opportunity of operating the system for several hours without powering up the traditional generators is also considered. For each configuration, CO2 and NOx emissions, purchasing and operating costs, as well as weight and volume, are estimated. Emissions may be reduced up to 20 % and 60 % for CO2 and NOx, respectively, and fuel cost reductions up to 35 % may be achieved.

Published
2020
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19. Technical-Economical Comparison Between Cogeneration, Pellet Production and Thermal Uses of Biomass

Author

Poli, Davide and Giglioli, Romano

Subjects
pellet, Combined heat and power generation (CHP), district heating, pellet, Combined heat and power generation (CHP), Biomass, district heating
Abstract

The logistics for the collection of energy biomasses is a major constraint in areas with severe orography, lack of transportation infrastructures and dispersed land ownership. The use of small size units eases this process for it reduces the extension of the gathering area. Nevertheless, small size means low electrical efficiency and high specific costs. Many yearly operating hours are required for making a small plant become a cost effective solution. A difficult compromise must be settled, between the proximity of the plant to the woodland and the presence of a local heat demand, for a full exploitation of the power output.This paper discusses the idea of using the heat surplus of a biomass-fired cogeneration unit to treat a share of the biomass and produce fuel like pellet, to be stored and distributed for heating purposes. This form of thermal energy storage makes time and geographical shift of heat utilization possible, also in small-scale applications. A technical-economical comparison is carried out and discussed between the above mentioned system and a district heating supplied by a traditional biomass boiler, or a conventional chip-fired cogeneration plant without pellets production. The economic profitability of different plant solutions is investigated in some case-studies., Proceedings of the 23rd European Biomass Conference and Exhibition, 1-4 June 2015, Vienna, Austria, pp. 702-708

Published
2015
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