Calculation method of daily supply of liquefied natural gas under fob and des mixed delivery mode
A technology of liquefied natural gas and a calculation method, which is applied in the field of calculation of the daily supply of liquefied natural gas, can solve the problems of not reflecting the uneven influence of daily gas consumption, low calculation accuracy of the supply, and high frequency of supply chain accidents, and achieves alleviation Contradictions of urban peak regulation, good economic benefits, and the effect of improving safety
Active Publication Date: 2016-08-24
SHANGHAI GAS ENG DESIGN & RES
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Problems solved by technology
This method has the following three main disadvantages: first, the calculation accuracy of the supply is not high, and the deviation from the actual supply is large, which affects the gas consumption of users; second, the calculation of the supply only considers the balance of supply and demand from the perspective of the annual total. The impact of unevenness in daily gas consumption is not reflected, which makes the contradiction of peak shaving prominent; third, the calculation of supply volume does not match the overall resource shipping plan of the upstream, and the frequency of supply chain accidents is relatively high
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[0031] When using the calculation method of the daily supply of liquefied natural gas of the present invention to determine the daily supply of liquefied natural gas to an area (target area), such as figure 1 shown, including the following steps:
[0032] Step 100, determine n user types and m+1 gas sources, wherein m is the number of pipeline natural gas sources and 1 is the number of liquefied natural gas sources.
[0033]Specifically, multiple user types and multiple gas sources providing natural gas are determined for the target area, wherein the number of multiple user types is n, and the number of multiple gas sources is m+1. In this embodiment, the target area is Shanghai, and the user types include four user types (n=4) including city gas user type, industrial and chemical user type, 2500-hour natural gas power plant user type and 7000-hour natural gas power plant user type. Among them, the urban gas user type refers to the urban gas users in Shanghai; the industrial ...
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The invention discloses a computing method for the daily supply quantity of liquefied natural gas. The method is used for computing the daily supply quantity of the liquefied natural gas in an area and comprises the following steps: determining multiple user types and providing a plurality of gas sources comprising pipeline natural gas sources and liquefied natural gas sources; acquiring the daily demand characteristic index of the jth user type in the area, and computing the daily demand of the natural gas of the kth day; acquiring the gas supply index of the lth pipeline natural gas source, and computing the daily supply quantity of the pipeline natural gas of the kth day; and computing the daily supply quantity of the liquefied natural gas of the kth day according to the daily demand of the natural gas of the kth day and the daily supply quantity of the pipeline natural gas of the kth day. The method disclosed by the invention also comprises a process for determining the computed daily supply of the liquefied natural gas of the kth day. The invention provides a scientific, special and normative computing method for the daily supply quantity of the LNG (liquefied natural gas) under the FOB and DES mixed delivery mode, and has better economic and social benefits.
Description
technical field [0001] The invention relates to a calculation method for the daily supply of liquefied natural gas, in particular to a calculation method for the daily supply of liquefied natural gas under the mixed delivery mode of FOB and DES. Background technique [0002] Recently, the world oil price keeps rising, and the long-distance cross-sea pipeline transportation of natural gas is restricted by many aspects, which promotes the rapid growth of liquefied natural gas (LNG) trade. my country introduced the first imported LNG project in China in 2006, and then the imported LNG project developed rapidly in my country. According to the national energy development strategy, medium and long-term imported LNG will account for about 1 / 3 of the domestic market share. [0003] At present, there are two methods of free on board (FOB) and delivery on board (DES) for bulk LNG custody transfer measurement in the world. FOB, FOB (Free On Board), is one of the commonly used trade t...
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IPC IPC(8): G06Q50/06
Inventor 金芳马迎秋蒋克武刘军
Owner SHANGHAI GAS ENG DESIGN & RES