The structure of LNG marine equipment mainly includes the following aspects:
LNG storage and monitoring system: For small LNG-powered ships, the storage of LNG fuel generally adopts C-type storage tanks, while for large LNG transport ships, there are many types of liquid cargo tanks for LNG storage, including independent liquid cargo tanks (type A, type B, type C), membrane liquid cargo tanks, semi-membrane liquid cargo tanks, integral liquid cargo tanks and internal insulation liquid cargo tanks. For example, type A independent liquid cargo tanks are mainly square in design and need to be equipped with complete secondary barriers. The maximum design pressure generally does not exceed 0.07MPa, and the operating temperature is below -55℃. Type B independent liquid cargo tanks include MOSS spherical and SPB prismatic structures, and the design pressure generally does not exceed 0.07MPa. Type C independent liquid cargo tanks are designed and produced according to the requirements of pressure vessels, and the design pressure is usually not more than 2.16MPa.
LNG gasification/heating system: This system is responsible for gasifying, heating, and pressurizing the liquefied natural gas stored on board, and providing it to the ship's main engine or other gas-using equipment in a timely and quantitative manner.
LNG filling and gas supply pipeline: This part is responsible for the filling of LNG and the layout of the gas supply pipeline to ensure that LNG can be safely and efficiently transported to the point of use.
Control system: It is used to monitor and control the operating status of the entire LNG system to ensure the stability and safety of the system.
Safety system: It includes various safety devices and emergency measures to ensure rapid response in abnormal situations and protect the safety of personnel and equipment.