液化天然气(LNG)的长距离输送及其冷能利用

Long-distance transportation of liquefied natural gas(LNG) and cold energy utilization

通过Sinda/Fluint软件针对在不同保温层厚度及外界环境温度的条件,对LNG长输管道进行模拟仿真,得到了管道末端的温度及长距离输送的压力损失。模拟结果表明保温层厚度0.1 m,外界温度33.5℃时,-160℃、6.6MPa的LNG经过12km的长距离输送后温度升高4.068℃,压力损失2.52MPa。以此为初始条件,通过HYSYS软件设计管道下游的LNG冷能利用方案,为LNG接收站12 km外的共30×104m2的低温库、常温库和高温库提供冷量。

The end temperatures and the pressure drop of the long-distance pipeline for the LNG transportation,at different thickness of the thermal insulation layer with different external environment temperatures,are obtained by using Sinda/Fluint software.The simulation results show that the LNG temperature increase is 4.068℃,and the pressure drop is 2.52 MPa at thickness of the thermal insulation layer of 0.1 m and the outside temperature of 33.5℃,after 12 km long distance transportation of LNG at inlet temperature of-160℃and inlet pressure of 6.6 MPa.Taking into account of these conditions,the LNG cold energy utilization scheme at downstream of the pipeline is designed by HYSYS software,for a total cold capacity of 300000m^2 operating respectively at cold storage,normal temperature storage and high temperature storage,at around 12 km away from the LNG receiving station.