Research progress in LNG floating production storage and offloading unit

Based on conceptual design of LNG floating production storage and offloading units (FLNG) in recent years, the research history and the latest research progress in FLNG in the hull, LNG storage tank, liquefaction process, cryogenic heat exchanger, product loading and unloading and other technologies are analyzed. FLNG research is continuously improved and the feasibility and reliability of FLNG key technology are verified through computer simulation and experimental simulation. The conceptual design of FLNG generally uses double-hull, SPB LNG storage tanks, simple liquefaction process (such as mixed refrigerant agent or expansion refrigeration process) and side-by-side unloading method. Through analysis of construction investment and operating income of the FLNG unit, it is pointed out that the FLNG transformed from a used LNG cargo ship and simple liquefaction process can make the FLNG unit obtain the better economic benefits.