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System and method for deriving storage tank operation plan
US9513639B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9513639-B2 |
| Application number | US-201214352656-A |
| Country | US |
| Kind code | B2 |
| Filing date | Oct 19, 2012 |
| Priority date | Oct 24, 2011 |
| Publication date | Dec 6, 2016 |
| Grant date | Dec 6, 2016 |
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Abstract
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To derive a feasible solution for an operation plan problem for storage tanks for storing liquefied natural gas, which is a complicated mixed-integer non-linear problem, given tank initial state information, reception plan information, and feed plan information, two solving processes are executed alternately two or more times, respectively: a first solving process that replaces a mixed-integer non-linear programming problem with a mixed-integer linear programming problem by linear approximation of a non-linear expression in non-linear constraints containing the non-linear expression, and solves the problem to derive provisional solutions or final solutions for a reception pattern that prescribes a storage tank that is to receive liquefied natural gas, and a discharge pattern that prescribes a storage tank that is to discharge liquefied natural gas, and a second solving process that replaces a mixed-integer non-linear programming problem with a continuous non-linear programming problem by provisionally fixing a discrete variable in discrete form constraints containing the discrete variable, and solves the problem to derive provisional solutions or final solutions for transitions of storage quantity and storage heat quantity of liquefied natural gas in each storage tank.
First claim
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The invention claimed is: 1. A storage tank operation plan deriving system, comprising: a storage device configured to accept respective inputs of tank initial state information containing initial storage quantity and initial storage heat quantity of liquefied natural gas of each of a plurality of storage tanks for storing the liquefied natural gas, reception plan information containing reception time, reception quantity and reception heat quantity of the liquefied natural gas in…
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- What does patent US9513639B2 cover?
- To derive a feasible solution for an operation plan problem for storage tanks for storing liquefied natural gas, which is a complicated mixed-integer non-linear problem, given tank initial state information, reception plan information, and feed plan information, two solving processes are executed alternately two or more times, respectively: a first solving process that replaces a mixed-integer …
- Who is the assignee on this patent?
- Osaka Gas Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification G05D9/12. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Dec 06 2016 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).