Method and device for detecting a non-condensable portion of a medium which is at least in part gaseous
AssigneeEndress + Hauser Flowtec AG
InventorRainer Höcker
Life of this patent
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Abstract
Disclosed is a method and a device for detecting a non-condensable portion of a medium, which has at least one condensable portion and is present at least partially in gaseous form, wherein in a first method step a temperature measuring device measures a temperature of the medium and a pressure measuring device measures a pressure of the medium, wherein in a second method step a ratio of the pressure to temperature is formed by means of an electronic measuring/operating circuit and this ratio is compared with a desired ratio of a desired pressure and a desired temperature, and wherein in a third method step the electronic measuring/operating circuit outputs a report in case of a minimum deviation of the ratio from the desired ratio.
Claims10
A method for detecting a non-condensable portion of a medium flowing through a pipeline, wherein the medium includes at least one condensable portion and is present in gaseous form, the method comprising:
- measuring a temperature of the medium with a temperature measuring device and a pressure of the medium with a pressure measuring device;
- forming by means of an electronic measuring and operating circuit a ratio of the pressure to the temperature and comparing the ratio with a desired ratio of a desired pressure and a desired temperature;
- deducing a presence of the non-condensable portion of the medium when the ratio deviates from the desired ratio;
- outputting a report by means of the electronic measuring and operating circuit when the ratio deviates from the desired ratio;
- verifying a presence of a gaseous medium by means of a verification measuring device;
- measuring with the verification measuring device a flow velocity of the medium in the pipeline and at least one of the following media properties:
- velocity of sound, sound absorption, absorption of electromagnetic radiation, electrical conductivity, density, viscosity, thermal conductivity, amplitude of a surface wave, frequency of a surface wave, and phase of a surface wave;
- and
- deducing a presence of a liquid medium when one of the measured media properties deviates from an expected desired value or a desired value range.
A device for detecting a non-condensable portion of a medium, wherein the medium includes at least one condensable portion and is present at least partially in gaseous form, the device comprising:
- a temperature measuring device adapted to measure a temperature of the medium;
- a pressure measuring device adapted to measure a pressure of the medium;
- a verification measuring device adapted to verify a presence of a gaseous state of the medium and further adapted to measure a flow velocity of the medium in the pipeline and at least one of the following media properties:
- velocity of sound, sound absorption, absorption of electromagnetic radiation, electrical conductivity, density, viscosity, thermal conductivity, amplitude of a surface wave of an inner wall of the pipeline, frequency of a surface wave of the inner wall of the pipeline, and phase of a surface wave of the inner wall of the pipeline;
- and
- an electronic measuring and operating circuit adapted to operate the temperature measuring device, the pressure measuring device, and the verification measuring device, wherein the electronic measuring and operating circuit is further adapted to:
- measure the temperature of the medium with the temperature measuring device and the pressure of the medium with the pressure measuring device;
- form a ratio of the pressure to the temperature and compare the ratio with a desired ratio of a desired pressure and a desired temperature;
- deduce a presence of the non-condensable portion of the medium when the ratio deviates from the desired ratio;
- deduce a presence of a liquid medium when one of the measured media properties deviates from an expected desired value or a desired value range;
- and
- output a report when the ratio deviates from the desired ratio.
Dependencies are inferred from the claim text.