液化天然气浮式生产储卸装置低温液货卸载参数的定量分析

基于海上液化天然气的浮式生产储卸装置,应用Aspen plus软件建立1∶1的物理及数学模型,模拟计算了其低温液货卸载的流程,结合模拟结果和动量及能量方程分析了影响海上天然气卸载的主要参数,着重研究液化天然气输送流量、管路高度差对泵压差和蒸发气体质量的影响.结果表明:随着液化天然气输送流量增加,泵压增大而蒸发气体质量先减小而后增大,并存在一个最为经济的设计流量值;管路高度差对低温软管液货卸载的影响明显.

Quantitative Analysis of Main Parameters on Cryogenic LNG Offloading from LNG-FPSO

Based on the conceptual design of LNG offloading system for LNG FPSO (liquefied natural gas floating production storage and offloading unit), a 1∶1 model of the floating LNG offloading process from LNG FPSO to LNG carrier was established. Detailed simulations were conducted and the main parameters, in particular the influences of the flow rate and the height difference of pipeline on the pump head and BOG (boil of gas) of the LNG offloading processes were quantitatively analyzed with the Aspen plus software. The results indicate that there are the dissimilar influences of the flow rate on the pump head and BOG therefore there would be an economic flow rate for practical design. The height difference of pipeline has obvious influence on the pump head for LNG FPSO offloading.