Offshore adaptability enhancement mechanism of falling film flow outside the FLH2 channel tube during floating hydrogen energy storage and transportation
With the development of hydrogen production technology from offshore wind power and natural gas,the deep-sea energy interconnection system using hydrogen energy as the medium is constantly improving.Liquid hydrogen storage and transportation is an effective method for large-scale transportation and utilization of offshore hydrogen energy.Revealing the mechanism of falling film flow under offshore sloshing conditions is the key to realize efficient storage and transportation of floating hydrogen energy.In this paper,the method of floating visualization experiment and numerical simulation is conducted to reveal the offshore adaptability enhancement mechanism of falling film flow outside the FLH2(floating hydrogen liquefaction unit)channel tube during floating hydrogen energy storage and transportation,based on high-speed camera technology and sloshing platform,the coupled VOF and Level Set two-phase flow model and moving grid technology.The results show that the liquid film uniformity of the falling film flow outside the corrugated tube is better than the conventional circular tube,spiral grooved tube and square corrugated tube.Under the offshore conditions,the flow pattern of corrugated tube is stable,and the dry patch of corrugated tube surface does not appear.It is recommended to use the corrugated tube in the floating hydrogen liquefaction unit.Based on visual experiments and numerical simulation results,the evolution law of falling film flow pattern and a calculation correlation for film thickness of corrugated tube are obtained.
hydrogen storage and transportationfalling film flowoffshore adaptabilityenhancement mechanism
万方数据
维普
