# US 2014/0190271 A1 · High-precision determination of the mass proportion of a component in a multi-component fluid

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- Number: US 2014/0190271 A1
- Document ID: US20140190271A1
- Status: Published application
- Kind: A1
- Application number: 14/237,875
- Filed: 2012-08-22
- Published: 2014-07-10
- Earliest claimed: 2011-08-23
- Assignees: Siemens Aktiengesellschaft
- Inventors: Gilbert Braun; Peter Kury
- Web page: https://patentgrep.com/patent/US20140190271A1

## CPC

- G01F 1/74: Devices for measuring flow of a fluid or flow of a fluent solid material in suspension in another fluid
- G01F 15/08: Air or gas separators in combination with liquid meters; Liquid separators in combination with gas-meters
- G01N 33/0014: {by eliminating a gas (by a chemical reaction G01N33/0013; a chemical reaction taking place or a gas being eliminated in one or more analysing channels G01N33/0024)}
- G01F: MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01N: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES (measuring or testing apparatus or processes other than immunoassay, involving enzymes or microorganisms C12M, C12Q)

## Abstract

A method to determine a mass proportion of a first component of a multi-component fluid is provided that includes separating the first component in a separation step at least in part from the multi-component fluid, determining at least two reference flow rates, selected from a flow rate of the multi-component fluid supplied to the separation step, a flow rate of a residual fluid resulting from the separation of the first component, and a flow rate of a separation fluid accumulating in the separation step, and determining the mass proportion of the first component from the selected reference flow rates, taking into account a non-separated residual content of the first component in the residual fluid. An extraneous content of an additional separated component of the multi-component fluid is additionally taken into account.

## Claims

### Claim 1

A method for determining a mass proportion of a first component (W) of a multi-component fluid (F), comprising
at least partially separating the first component (W) from the multi-component fluid (F) in a separation step,
determining at least two reference flow rates (M1, M2), selected from
a flow rate (m1) of the multi-component fluid (F) fed to the separation step,
a flow rate (m2) of a residual fluid (T) resulting from the separation of the first component (W), and
a flow rate (m3) of a separation fluid (K) occurring in the separation step,
determining the mass proportion (xW) of the first component (W) from the chosen reference flow rates (M1, M2) while taking into account a non-separated residual proportion (mW2) of the first component (W) in the residual fluid (T), and
accounting for an extraneous proportion (mD3) of a further component (D) of the multi-component fluid (F) that is separated at the same time in the separation step.

### Claim 2 (depends on 1)

The method as claimed in claim 1,
wherein the reference flow rates (M1, M2) are determined by direct measurement of the mass flow rate (m1, m2) of the multi-component fluid (F), of the residual fluid (T) and of the separation fluid (K).

### Claim 3 (depends on 2)

The method as claimed in claim 2,
wherein the determination of the reference flow rates (M1, M2) takes place in each case by a Coriolis mass flowmeter.

### Claim 4 (depends on 1)

The method as claimed in claim 1,
wherein the pressure (p) of the multi-component fluid (F) fed to the separation step is controlled to a predetermined setpoint value by means of a pressure controller.

### Claim 5 (depends on 4)

The method as claimed in claim 4,
wherein pressure fluctuations of the multi-component fluid (F) fed to the separation step that are caused by the pressure controller are reduced by a damping element arranged downstream of the pressure controller.

### Claim 6 (depends on 1)

The method as claimed in claim 1,
wherein a gas flow is used as the multi-component fluid (F), and in which in the separation step the separation fluid (K) is separated by condensation in a condenser.

### Claim 7 (depends on 6)

The method as claimed in claim 6,
wherein the non-separated residual proportion (mW2) of the first component (W) in the residual fluid (T) is determined on the basis of the saturation vapor pressure (pS) at the condenser temperature (TK).

### Claim 8 (depends on 6)

The method as claimed in claim 6,
wherein the extraneous proportion (mD3) of the further component (D) in the separation fluid (K) is determined on the basis of the solubility (β) of the further component (D) in the first component (W) at the condenser temperature (TK).

### Claim 9 (depends on 5)

The method as claimed in claim 5, wherein the damping element comprises a filter.