液化天然气接收站不同船期下动态罐容模型建立及分析

ESTABLISHMENT AND ANALYSIS OF DYNAMIC TANK CAPACITY MODELS UNDER DIFFERENT SHIPPING SCHEDULES FOR LNG TERMINALS

根据规划的不同船期模式,考虑外输量的季节调峰、日调峰以及安全余量影响,建立了均匀船期、半均匀船期和自主船期3种罐容动态计算模型。针对某接收站,分别采用3种模型进行计算。对比计算结果可知:均匀船期模型船期安排自由度最小,计算所需罐容最大;自由船期模型船期安排自由度最高,计算所需罐容最小;半均匀船期模型船期安排自由度、计算所需罐容均适中。因此建议各接收站根据实际进货计划合理安排船期,尽可能做到自主船期经营,从而减少储罐建造个数,节省投资。

According to different shipping schedules,three dynamic calculation models of tank capacity required for uniform shipping schedule,semi-uniform shipping schedule and adjustable shipping schedule are established after taking the influence of seasonal and daily peak shaving and safety margin into consideration.Three models have been applied to calculate the required tank capacity for one LNG terminal.After comparing the results,it is obtained that the tank capacity required for uniform shipping schedule model which has the smallest degree of freedom in scheduling is the largest;the tank capacity required for free shipping schedule model which has the highest degree of freedom in scheduling is the smallest and the tank capacity required for semi-uniform shipping schedule model which has the moderate degree of freedom in scheduling is moderate.Therefore,it is recommended that each LNG terminal should arrange the shipping schedule reasonably according to the actual purchase plan and try to achieve independent shipping schedule operation model so as to reduce the number of storage tanks to be built and save investment.