Research on the offshore adaptability of new offshore ammonia-hydrogen coupling storage and transportation technology

Hydrogen energy and ammonia energy have received worldwide attention as ideal wind and solar energy storage media, which can effectively solve the problem of grid-connected deep-sea wind power and uneven spatial distribution of global energy. Accelerating the layout of the deep-sea ammonia energy industry is of great significance to build a global ammonia-hydrogen coupling interconnection system and ensure the security of energy supply. Ammonia storage and transportation is the key to offshore ammonia utilization. The new concept of LNH3 floating production storage and offloading unit (FLNH3) is proposed for the offshore ammonia energy gathering and transportation. Ammonia gas is directly liquefied at sea, which can simplify the storage and transportation process of ammonia energy. However, the sloshing condition of wind and waves at sea needs to be considered for the special environment of offshore operations. The offshore adaptability of the refrigerant in the floating ammonia liquefaction process system is particularly important. In this paper, a floating low-temperature heat transfer experimental device has been built to study the effect of complex sloshing conditions at sea on the flow and heat transfer characteristics of refrigerant in the liquid ammonia temperature zone. The results show that the sloshing motion has little effect on the heat transfer performance in the liquid ammonia temperature zone, and the process system shows strong marine adaptability.