Liquefied natural gas(LNG)fueled fishing vessels have a wide horizon of development

in order to improve the LNG cold energy utilization efficiency of them

this paper compared the pros and cons of recycling LNG cold energy through refrigerated warehouse and power generation

and proposed a new LNG cold energy utilization system for LNG-fueled fishing vessels.The utilizing efficiency of cold energy and exergy in different Rankine cycle condensation temperature

evaporation temperature and secondary refrigerant outlet temperature were obtained in this paper.The results show that the utilizing efficiency of cold energy increases significantly when Rankine cycle condensation temperature decreases or evaporation temperature rises.As secondary refrigerant outlet temperature increases

the utilizing efficiency of cold energy increases slightly

but the flow rate of secondary refrigerant increases significantly.In this system

the maximum cold energy utilization efficiency and exergy utilizing efficiency can respectively reach 200.1% and 28.6%

improved significantly and energy-saving effect is remarkable.