Experimental Study on the Effect of Pitch Sloshing on the Heat Transfer and Pressure Drop of an LNG Spiral-Wound Heat Exchanger

With the development and utilization of offshore liquefiednaturalgas, it is increasingly important to study the influence of the heattransfer performance of a spiral-wound heat exchanger under sloshingconditions. This study focused on the effects of different sloshingamplitudes and sloshing periods on the heat transfer and pressuredrop performance of a heat exchanger. Through experimental research,the results showed that the fluctuation of the UA (U is the heat transfer coefficient; A is the heatexchange area) value first increased and then decreased with an increasein the sloshing amplitude. The UA value increased by 12.92% and decreasedby 42.03% compared to the static value at 3 and 9 & DEG;, respectively.The fluctuation in the UA value first decreased and then increasedwith an increase in the sloshing period. The UA value decreased by36.66% and increased by 10.82% slowly compared to the static valuewhen the sloshing period was 6 and 20 s, respectively. Based on this,a mathematical model of heat transfer under the condition of pitchsloshing was established.