Method for accurately calculating volume and weight of LNG in storage tank

A storage tank and volume technology, applied in the field of accurate calculation of the volume and weight of LNG in the storage tank, can solve the problems of inaccuracy and other problems, and achieve the effect of facilitating storage management

Inactive Publication Date: 2018-12-18
JEREH OIL & GAS ENG
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since this comparison table only selects certain points for comparison according to the differential pressure from small to large, the rest can only be estimated, which is not accurate enough

Method used

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  • Method for accurately calculating volume and weight of LNG in storage tank
  • Method for accurately calculating volume and weight of LNG in storage tank
  • Method for accurately calculating volume and weight of LNG in storage tank

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Embodiment Construction

[0021] Such as Figures 1 to 2 As shown, a method for accurately calculating the volume and weight of LNG in a storage tank includes the following steps:

[0022] 1) Install a differential pressure transmitter on the storage tank to collect the differential pressure value P;

[0023] 2) Use the formula P=ρgh to calculate the liquid level height h in the storage tank;

[0024] 3) Use the tank volume calculation formula to calculate the storage tank volume V;

[0025] 4) Use the formula M=ρV to calculate the LNG weight M.

[0026] The storage tank is a storage tank with a standard oval head.

[0027] When calculating the volume V of the storage tank, let the length of the inner cylinder of the storage tank be L, the radius of the inner cylinder be R, then the radius of the head is R / 2, and the height of the liquid level in the storage tank be h;

[0028] 1) For vertical storage tanks, the bottom is a half ellipsoid,

[0029] When the liquid level height h is at or below the...

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Abstract

The invention discloses a method for accurately calculating the volume and weight of LNG in a storage tank. The method comprises the following steps that (1) a differential pressure transmitter is arranged on the storage tank, and the differential pressure value P is collected; (2) the liquid level height h in the storage tank is calculated by using the formula P= [rho]gh; (3) the storage tank volume V is calculated by using the storage tank volume calculation formula; and (4) the weight M of the LNG is calculated by using the formula M=[rho]V. The method for accurately calculating the volumeand weight of the LNG in the storage tank has the beneficial effects that the method can accurately calculate the volume and weight of the LNG in the storage tank, and users can conveniently perform reserve management of an LNG filling station well.

Description

technical field [0001] The invention relates to the field of natural gas equipment, in particular to a method for accurately calculating the volume and weight of LNG in a storage tank. Background technique [0002] At the LNG filling station, users need to know the LNG inventory. [0003] LNG storage tanks are generally equipped with a differential pressure transmitter, through which the LNG liquid level in the storage tank can be calculated. [0004] Through the comparison table on the storage tank, the volume and weight of LNG in the storage tank can be estimated. Since this comparison table only selects some points for comparison according to the differential pressure from small to large, the rest can only be estimated, which is not accurate enough. [0005] For this reason, there is an urgent need for a method that can accurately calculate the volume and weight of LNG in the storage tank. Contents of the invention [0006] The object of the present invention overcom...

Claims

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Application Information

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IPC IPC(8): G01D21/02
CPCG01D21/02
Inventor 张泽华王文鑫李建举王文斌杨友权
Owner JEREH OIL & GAS ENG
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