Three kinds of boil-off gas(BOG)recovery method of liquefied natural gas(LNG)filling station were comparatively analyzed and the recovery technology using a high power Stirling cryocooler was the best choice.This recovery method was not restricted by the nature gas pipeline network and compressed nature gas(CNG)and the "zero emissions" in LNG storage and transportation was performed.Its economy and social benefit were distinct.On the basis of the above analysis

refrigerating capacity of the single integral Stirling cryocooler and liquefaction capacity of BOG were discussed.The experimental and calculation results showed that the cooling capacity of cryocooler are 1 kW at 77 K and 2 kW at 110 K.The monthly liquefaction capacity of BOG is more than 8 t and meets the demands of cooling capacity of BOG recovery.