摘要采用Fluent多相流混合模型,选用蒸发—沸腾相变模型实现了液氮相变数值模拟,对不同进口流速下LNG储罐整体温度场进行了计算与分析,进而得到储罐预冷的最佳流速。结果表明,为保证规范设计要求,LNG储罐温降速率不应超过5 K/h,因而液氮预冷速度不应过大,储罐温度至少要降低到160 K以下才能采用2 m/s的入流速度。此研究成果为LNG储罐的试验及实际应用提供了借鉴和参考。Evaporation-boiling phase change model is adopted to conduct numerical simulation of liquid nitrogen phase change by using the mixture multiphase flow model in Fluent software, and the overall temperature field of LNG storage tanks under different inlet flow velocities are calculated and analyzed, and then the optimum flow velocity for storage tank precooling can be obtained. The result indicates that the temperature drop rate of LNG storage tanks shalt not be more than 5 K/h, so the liquid nitrogen precooling velocity shall not too high, and the inlet flow velocity of 2 m/s can be adopted when the tank temperature drops to below 160 K. The study result provides references for the experiment and actual application of LNG storage tanks.
机构地区大庆油田工程建设公司安装公司
出处《油气田地面工程》 2017年第8期43-45,共3页Oil-Gas Field Surface Engineering
基金基金论文:中型天然气液化厂施工关键技术研究(AR/AO/7-14-01)
关键词LNG 低温储罐 液氮 相变预冷 数值模拟LNG cryogenic storage tank liquid nitrogen phase change precooling numerical stimulation
分类号
TE972 [石油与天然气工程—石油机械设备]
