LOW EMISSION PROPULSION PLANTS FOR URBAN AND COASTAL TRANSPORTATION

The problem of the pollution in the urban areas is increasingly conditioning our social life in many ways; the aim of this work is to give an outlook of some possible fields of application of alternative solutions having the goal of minimizing the environmental impact of the urban public transportation and of moving part of it at sea (when possible). Moreover, since in most cases load profiles present very particular characteristics from the point of view of their regularity, the evaluation of the use of alternative propulsion systems is opportune. In this work, the main aspects of the problem are examined while taking into account both conventional technical solutions and new solutions under development.