Offshore platforms will shake and tilt because of marine motion

which will influence flow distribution in the header of plate-fin heat exchanger. The distribution of pure water/air and air-water two-phase flow in horizontal and tilt state were conducted in the air-water two-phase flow distribution experimental apparatus. The effect of gas-liquid ratio and tilt angle on flow distribution in the header of plate-fin heat exchanger in tilt state were studied. The results show that flow distribution in static state is subject to the influence of the inertial force

and the flow distribution unevenness increases with the increase of the inlet flow and gas-liquid ratio. In tilt state

flow distribution is subject to the influence of both inertial force and gravity

and flow distribution evenness is much lower than the static state. Flow distribution unevenness increases with the increase of tilt angle

and is more sensitive to tilt when gas-liquid ratio increases. It is suggested that the header and heat exchanger should be fixed and installed strictly at horizontal/vertical state. Meanwhile the influence of tilt can be eliminated through the improvement of liquefaction process and heat exchanger design.