Considering the recent introduction of restrictions on air pollutant onboard ships and the increasing interest towards more energy efficient naval transportation, an effort is made in the present thesis to assess the possible design of a novel engine unit. More specifically, in the current regulation context, Gas Turbines are a promising alternative to current diesel engines, thanks to lighter fuel requirements, low NOx pollutants and the potential to run in combined cycle architecture with cogeneration strategies. While their application has shown clear advantages and drawbacks on large ships, there seems to be little if no data concerning smaller units. The present work tries to assess the possible design of a radial turbine for an engine to be employed onboard ships as a Mini Gas Turbine, i.e. up to 5 MW output power, taking into account cycle, aerodynamic and structural design. To this purpose, a platform was built in Ansys Workbench to perform Computational Fluid Dynamics and thermo-mechanical Finite Element simulations aimed to design and optimize such a novel radial turbine.

Small scale Cogenerative Energy Systems with low Environmental impact for Naval applications

LUZZI, MATTEO
2022

Abstract

Considering the recent introduction of restrictions on air pollutant onboard ships and the increasing interest towards more energy efficient naval transportation, an effort is made in the present thesis to assess the possible design of a novel engine unit. More specifically, in the current regulation context, Gas Turbines are a promising alternative to current diesel engines, thanks to lighter fuel requirements, low NOx pollutants and the potential to run in combined cycle architecture with cogeneration strategies. While their application has shown clear advantages and drawbacks on large ships, there seems to be little if no data concerning smaller units. The present work tries to assess the possible design of a radial turbine for an engine to be employed onboard ships as a Mini Gas Turbine, i.e. up to 5 MW output power, taking into account cycle, aerodynamic and structural design. To this purpose, a platform was built in Ansys Workbench to perform Computational Fluid Dynamics and thermo-mechanical Finite Element simulations aimed to design and optimize such a novel radial turbine.
Marine Propulsion; Statistical Analysis; Gas Turbines; Mini Gas Turbines; COGES; CFD; FEM; Radial Turbomachinery; Multidisciplinary Optimization;
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Descrizione: Multidisciplinary Design and Optimization of a Mini Gas Turbine for combined Heat and Energy generation onboard passenger ships
Tipologia: Tesi di dottorato
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11567/1082823
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