Study On The Scale Of LNG Wharf And Receiving Terminal Based On The Different Demand

With the rapid growth of natural gas demand and import in China,liquefied natural gas(LNG)wharf and receiving terminal,as the hub of strategic channel for offshore import of LNG,are of great significance to ensure the stable supply of natural gas.However,the scale design of LNG wharf and receiving terminal in China has not been fully developed.Imbalance between supply and demand have become increasingly prominent,which have a serious impact on production and life.Therefore,evaluating the impact of demand fluctuation on the construction scale of LNG wharf and receiving terminal,and studying the optimal construction scale from a systematic point of view,so as to improve the receiving capacity and reduce the operation cost,become the key to determine the size of LNG wharf and receiving terminal facilities.Firstly,this paper analyses the characteristics of natural gas demand and the influencing factors of LNG wharf and receiving terminal scale,focusing on the influence of natural gas demand and imbalance of demand on LNG wharf and receiving terminal scale;Secondly,it divides the operation system modules of LNG wharf and receiving terminal,analyses the cost drivers of each operation link based on activity-based costing method and establishes a resource base,and then builds a resource base to consider the needs.The cost optimization model of fluctuating LNG wharf and receiving terminal is solved by system simulation method,which can be more objectively and truly reflect the changes of factors in the operation process,and realize all-round quantitative evaluation of transportation,production and energy-deficiency costs.Finally,the influence of demand fluctuation on LNG berth number and storage tank capacity is studied by taking demand volume and peak-valley difference as variables,respectively.According to the output of the simulation model,the substitution relationship between berth and storage tank is analyzed,and the influence of demand fluctuation on the shortage is analyzed according to the shortage of each simulation scheme.On this basis,the optimal berth number and tank capacity under different demand fluctuations are obtained by solving the optimization model.This paper studies the impact of demand fluctuation on the size of LNG wharf and receiving terminal.On the basis of in-depth analysis of the characteristics of natural gas demand and the factors affecting the size of LNG wharf and receiving terminal,the resource base of LNG wharf and receiving terminal operation system is established based on the activity-based costing method,and then the optimization model of LNG wharf and receiving terminal activitybased costing with the objective of minimizing the system activity-based costing is constructed.The results show that both demand and peak-valley difference have an impact on the determination of LNG berth number and tank capacity.The larger the demand and peak-valley difference are,the more berth number and tank capacity are needed.From the point of view of meeting the gas demand,berths and tanks can be replaced,one berth can replace 2-5 tanks.The large-scale ship and the improvement of navigation rules can improve the passing capacity of LNG wharf and improve the gas shortage.The example analysis shows that when the demand increases by 15% from 10 million tons,the corresponding berths remain unchanged and the operation cost increases by 8.9% by adding two tanks.When the peak-valley difference decreases from 12.5 to 3.0,one berth and 0 tanks can be reduced,and the operation cost can be reduced by 4.2%.