Abstract: With the increase of the ship that uses liquified natural gas (LNG) as main fuel, the technology, methods, facilities and equipment for the filling of LNG fuel have been a prominent issue in shipbuilding and shipping industry. LNG bunker vessel is an important development direction of LNG offshore filling technology because of its advantages of self-navigation ability, safety and reliability, flexible scheduling and so on. Considering the research work of the design of the LNG bunker vessel and experts advice in recent years, a set of evaluation index system for LNG bunker vessel is established and its evaluation method is studied. On the basis of establishing the evaluation index system, the optimization of design scheme is made by using the improved fuzzy analytic hierarchy process. Preliminary analysis and calculation examples show that the evaluation index system and evaluation method are applicable and reliable.

Key words: liquified natural gas (LNG) bunker vessel, evaluation index system, evaluation method, fuzzy synthetic discrimination, hierarchy analysis