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Method and measurement device for determining compressibility of flowing fluid

A technology of flowing fluid and measuring device, applied in the direction of mass flow measuring device, measuring device, liquid/fluid solid measurement, etc., can solve the problem of not directly available

Active Publication Date: 2018-05-11
ENDRESS HAUSER FLOWTEC AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in many cases it is not directly available

Method used

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  • Method and measurement device for determining compressibility of flowing fluid
  • Method and measurement device for determining compressibility of flowing fluid
  • Method and measurement device for determining compressibility of flowing fluid

Examples

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Embodiment Construction

[0031] Embodiment of method 1 of the present invention figure 1 The illustrated example comprises: in a first step 10, recording a first density measurement ρ of the flowing fluid 1 and the associated first pressure measurement p 1 , where, through the first flow resistance R relative to the throttling device with variable flow resistance 1 Pumping the fluid creates a first pressure of the flowing fluid.

[0032] After recording the first density measurement ρ 1 and the associated first pressure measurement p 1 Then, in the second step 20, at the second flow resistance R of the throttling device 2 Recording a second density measurement ρ of the flowing fluid occurs when 2 and the associated second pressure measurement p 2 , where the first flow resistance is different from the second flow resistance. In the case of an essentially constant volume flow of the fluid through the throttling device, correspondingly different values ​​of the first static pressure and of the se...

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Abstract

A method (1) for determining the compressibility of a flowing fluid comprises the following steps: driving a volume flow of the fluid by means of a pump through at least one measuring tube of a vibronic density meter at a first pressure which is maintained by means of a throttle; determining a first density measurement value of the flowing fluid at the first pressure (10); determining a first pressure measurement value of the flowing fluid at the first pressure (10); driving a volume flow of the flowing fluid by means of a pump through a density meter at a second pressure which is maintained by means of a throttle; determining a second density measurement value of the fluid at the second pressure, which differs from the first pressure (20); determining a second pressure measurement value of the flowing fluid at the second pressure (20); determining the compressibility of the fluid based on the first density measurement value, the second density measurement value, the first pressure measurement value, and the second pressure measurement value, under the assumption that the composition of the fluid is unchanged between the detection of the first density measurement value and of the second density measurement value (30).

Description

technical field [0001] The invention relates to a method for determining the compressibility of a flowing fluid. Background technique [0002] Under reference conditions, especially at a reference pressure of 1013 MPa, the density of the fluid is meaningful for evaluating the fluid. However, in many cases it is not directly available. One solution is to calculate the density at a reference pressure from density measurements recorded at higher pressures. In order to be able to perform this calculation reliably, as precise as possible knowledge of the compressibility is required. Contents of the invention [0003] It is therefore an object of the present invention to provide a method and a measuring device which make it possible to determine the compressibility of a fluid as simply and reliably as possible, in particular for determining the density of a medium at a reference pressure. [0004] The object of the invention is achieved by the method of independent claim 1 an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N9/00G01N9/26G01F1/84G01F15/00G01F15/02G01F1/44G01F1/88G01F5/00
CPCG01N9/002G01F5/005G01F15/005G01N9/26G01F1/44G01F1/84G01F1/88G01F15/001G01F1/36
Inventor 克里斯托夫·胡伯米歇尔·兰布里格
Owner ENDRESS HAUSER FLOWTEC AG
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