Patent EP0101119A1 successfully refreshed from Google Patents.
EP0101119A1
Expired / Lapsed
EP
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Method and device for measuring the flow of a physical quantity
Assignee: CC Controls BV
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Filing: 1983-07-26
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Granted: —
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Expires: 2003-07-26
Abstract
Abstract The invention relates to a method of measuring the stream of a physical magnitude correlating with the mass stream of a medium flowing through a duct, for example, the mass stream itself or the heat stream given off by said medium to a consumer station or derived therefrom. The invention has for its object to provide a method and a device of the kind set forth operating with excellent accuracy and reproduceability for long and short periods within a very large range of values. The invention proposes to measure the mass stream of the medium by arranging in the medium a streamline element, by imparting to at least one predetermined, thermally active part of the wall of said streamline element a predetermined temperature, which may vary along said wall part, by measuring the temperature of the medium in the thermally undisturbed medium, for example, upstream with respect to the streamline element, by measuring the temperature of the medium affected by said wall part in thermal respect such as the heat conduction capacity, the density, the viscosity and the specific heat and by assessing the mass stream from said temperatures and the physical properties of the medium.
Inventors
- 👤 Augustinus Wilhelmus Maria Bertels
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 21:50
CPC Classifications
G; G01; G01F; G01F1/00; G01F1/68; G01F1/684; G01F1/6842; G01F1/6847; G01K; G01K17/00; G01K17/06; G01K17/08; G01K17/10; G01K17/12; G01K17/16
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
113 words
A method of measuring the stream of a physical magnitude correlated with the mass stream of a medium flowing through a duct characterized in that the mass stream is measured by arranging a streamline element in the medium, by imparting to at least one predetermined, thermally active part of the wall of said streamline element a predetermined temperature which may vary along said wall part, by measuring the temperature of the medium in the thermally undisturbed medium, for example, upstream of the streamline element, by measuring the temperature of the medium thermally affected by said wall part and by assessing the mass stream from said temperatures and the physical properties of the medium.
Claim 2
Independent Claim
113 words
A method of measuring the stream of a physical magnitude correlated with the mass stream of a medium flowing through a duct characterized in that the mass stream is measured by arranging a streamline element in the medium, by imparting to at least one predetermined, thermally active part of the wall of said streamline element a predetermined temperature which may vary along said wall part, by measuring the temperature of the medium in the thermally undisturbed medium, for example, upstream of the streamline element, by measuring the temperature of the medium thermally affected by said wall part and by assessing the mass stream from said temperatures and the physical properties of the medium.
Claim 3
Dependent Claim
82 words
A method of measuring of the heat stream given off or derived by a medium flowing through a duct to or from, respectively, a consumer station included in said duct characterized in that the mass stream is measured by the method claimed in Claim 1, the temperature difference of the medium upstream and, respectively, downstream of the consumer station is measured and subsequently the heat stream is assessed from the mass stream, the temperature difference and the physical properties of the medium.
Claim 4
Dependent Claim
38 words
A method as claimed in anyone of Claim 1 or 2 characterized in that the thermally active wall part of the streamline element forms part of a heat pipe activated by a heat source or a heat sink.
Claim 5
Independent Claim
29 words
A method as claimed in Claims 2 and 3 characterized in that as a heat source or a heat sink the medium upstream of the consumer station is used.
Claim 6
Dependent Claim
144 words
A method as claimed in Claim 4 characterized in that the temperature is assessed upstream of the consumer station by arranging a streamline element identical to the first streamline element and having a second wall part forming part of the heat pipe and being identical to the first-mentioned wall part in the medium upstream of the consumer station, said second wall part serving to transfer heat between the medium and the heat pipe and having a heat transfer coefficient equal to the heat transfer coefficient of the first wall part, in that the temperature difference across the first wall part is measured, the temperature difference of the medium upstream and downstream respectively of the consumer station is measured and the ratio between the two temperature differences is assessed, said ratio between representative of the power absorbed or, respectively given off by the consumer station.
Claim 7
Independent Claim
33 words
A device for measuring the stream of a physical magnitude correlated with the mass stream of a medium flowing through a duct characterized by means for measuring the mass stream, said means comprising
Claim 8
Independent Claim
33 words
A device for measuring the stream of a physical magnitude correlated with the mass stream of a medium flowing through a duct characterized by means for measuring the mass stream, said means comprising
Claim 9
Dependent Claim
149 words
a streamline element to be arranged in the duct, means for imparting to a predetermined, thermally active part of the wall of said streamline element a predetermined temperature, which may vary across said wall part, a first temperature sensing member to be arranged in the thermally undisturbed medium, for example, upstream of the streamline element in the duct for generating a first temperature signal, a second temperature sensing member in the medium thermally affected by said wall part in the duct for generating a second temperature signal, means for forming and giving off a third temperature signal representative of the temperature of the thermally active wall part, means for forming and giving off signals representative of the physical properties of the medium, means for forming a signal representative of the value of the stream from said signals and, as the case may be, display means for displaying said value.
Claim 10
Dependent Claim
149 words
a streamline element to be arranged in the duct, means for imparting to a predetermined, thermally active part of the wall of said streamline element a predetermined temperature, which may vary across said wall part, a first temperature sensing member to be arranged in the thermally undisturbed medium, for example, upstream of the streamline element in the duct for generating a first temperature signal, a second temperature sensing member in the medium thermally affected by said wall part in the duct for generating a second temperature signal, means for forming and giving off a third temperature signal representative of the temperature of the thermally active wall part, means for forming and giving off signals representative of the physical properties of the medium, means for forming a signal representative of the value of the stream from said signals and, as the case may be, display means for displaying said value.
Claim 11
Dependent Claim
84 words
A device for measuring a heat stream given off or derived by a medium flowing through a duct to or, respectively, from a consumer station included in said duct characterized by a device as claimed in Claim 6, means for forming and giving off a fourth temperature signal representative of the temperature upstream of the consumer station, means forming a signal representative of the value of the heat stream from said signals and, as the case may be, display means for displaying said value.
Claim 12
Dependent Claim
31 words
A device as claimed in Claim 6 or 7 characterized in that the thermally active wall part forms part of a heat pipe activated by a heat source or heat sink.
Claim 13
Dependent Claim
34 words
A device as claimed in Claim 7 or 8 characterized by a part of the heat pipe to be arranged upstream of the consumer station in the duct or at least thermally coupled herewith.
Claim 14
Dependent Claim
75 words
A device as claimed in Claim 9 characterized by a second streamline element to be arranged in the duct upstream of the consumer station, which element is identical to the first streamline element and is provided with a second wall part being identical to the first-mentioned wall part and forming part of the heat pipe and by means for forming and giving off a fifth temperature signal representative of the temperature of the heat pipe.
Claim 15
Independent Claim
29 words
A device as claimed in anyone of Claims 6 to 10 characterized by turbulence generating means for generating a predetermined turbulent stream along the or each active wall part.
Claim 16
Dependent Claim
25 words
A device as claimed in Claim 11 characterized by a threshold arranged in front of the wall part concerned viewed in the direction of flow.
Claim 17
Dependent Claim
30 words
A device as claimed in Claim 11 characterized by a zone of relatively great, predetermined roughness arranged in front of the wall part concerned, viewed in the direction of flow.
Claim 18
Independent Claim
50 words
A device as claimed in anyone of Claims 6 to 13 characterized in that the means for forming and giving off the second temperature signal are arranged on a part of the first streamline element consisting of thermally insulating. material in the medium undisturbed by the thermally active wall part.
Claim 19
Independent Claim
36 words
A device as claimed in anyone of Claims 6 to 14 characterized in that the or each streamline element is fastened, if desired in a releasable manner, to a supporting member fitting in the duct concerned.
Claim 20
Dependent Claim
26 words
A device as claimed in Claim 15 characterized in that the supporting member is integral with a duct portion to be included in the duct concerned.
Claim 21
Dependent Claim
17 words
A device as claimed in Claim 16 characterized in that the duct portion is a sectional portion.
Claim 22
Independent Claim
61 words
A device as claimed in Claims 10 to 16 characterized in that each streamline element is arranged in an associated duct portion, said duct portions being integral with one another and forming a coupling piece rigidly coupling both duct portions and being adapted to be included in the ducts concerned, said portions being manufactured together with the coupling piece by casting.
Claim 23
Dependent Claim
18 words
A device as claimed in Claim 18 characterized in that the heat pipe extends across the coupling piece.
References Cited (Backward Citations)
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