Life cycle assessment as an evaluation tool for carbon reduction techniques in marine industry

Global warming has been drawing researchers’ attention for decades and in marine industry many different strategy and 
technologies are introduced to mitigate the global warming effect. As a main contributor to global warming, carbon 
dioxide has been targeted as a significant emission to reduce from marine activities and there are many carbon emission 
reduction technologies introduced to shipping. However, the results of the reduction are varied and an evaluation tool to 
investigate their performances in a long term are necessary. Life cycle assessment is an evaluation method considering a 
product or system’s life span, from cradle to grave, covering all the activities which generate carbon emissions. While 
applying new carbon reduction technologies, the emissions from different activities are estimated and determined through 
life cycle assessment. Considering the related costs, a life cycle economic assessment can illustrate the overall savings 
with the application of carbon emission reduction technologies. Currently the assessments have been conducted to 
evaluate the applying of hybrid propulsion system, selection of engine configuration, utilization of solar panel array, 
adoption of carbon capture system, determination of maintenance strategy and so on. The results have indicated the 
performances of these carbon reduction methods from the perspectives of environment and economy which indicates that 
life cycle assessment is a feasible and comprehensive evaluation tool for the performance evaluations on carbon reduction 
techniques.