Fuel cells are one of the future technologies for marine energy sources. A fuel cell combines hydrogen and oxygen to produce electricity, with water and heat as its by-product. Since the conversion ...of the fuel to energy takes place via an electrochemical process, the process is clean, quiet and highly efficient.This paper presents the types and characteristics of fuel cells, the status of marine use, and the outline of safety requirements which apply to fuel cell power generation systems.
Over the years, ClassNK has made extensive failure investigations and incorporated the results into the classification rules, and presented the information on failures to other concerned parties. The ...objective of the presenting this information is to share the knowledge between related parties in order to avoid the future failures, and this paper was prepared towards this aim. In this paper, case studies on propellers, crankshafts, main engine bearings and coupling bolts have been selected as a failure in marine propulsion systems. The case studies together with detailed information including the results of investigations and the cause of failure will be of interest to marine engineers and other concerned parties.
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