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New Methods for Metering Quality Assurance in Natural Gas Grids
Luleå tekniska universitet.
1997 (English)Licentiate thesis, comprehensive summary (Other academic)
Place, publisher, year, edition, pages
Luleå: Luleå tekniska universitet, 1997. , 26 p.
Series
Licentiate thesis / Luleå University of Technology, ISSN 1402-1757
Research subject
Industrial Electronics
Identifiers
URN: urn:nbn:se:ltu:diva-63839OAI: oai:DiVA.org:ltu-63839DiVA: diva2:1107515
Supervisors
Available from: 2017-07-04 Created: 2017-06-09 Last updated: 2017-07-04Bibliographically approved
List of papers
1. Identification of inaccurate gasflow meters by a finger-print technique
Open this publication in new window or tab >>Identification of inaccurate gasflow meters by a finger-print technique
1996 (English)In: Proceedings of the 8th International Conference on Flow Measurement: FLOMEKO '96 / [ed] Zhang Baoyu, Beijing: Standard Press of China , 1996, 590- p.Conference paper (Refereed)
Place, publisher, year, edition, pages
Beijing: Standard Press of China, 1996
Research subject
Industrial Electronics
Identifiers
urn:nbn:se:ltu:diva-35764 (URN)a6c380b0-eb46-11db-88eb-000ea68e967b (Local ID)7-506-61231-3 (ISBN)a6c380b0-eb46-11db-88eb-000ea68e967b (Archive number)a6c380b0-eb46-11db-88eb-000ea68e967b (OAI)
Conference
International Conference on Flow Measurement : 20/10/1996 - 24/10/1996
Note
Godkänd; 1996; 20070327 (pekkari)Available from: 2016-09-30 Created: 2016-09-30 Last updated: 2017-06-09Bibliographically approved
2. In situ detection of inaccurate gas flow meters using a fingerprint technique
Open this publication in new window or tab >>In situ detection of inaccurate gas flow meters using a fingerprint technique
1998 (English)In: Flow Measurement and Instrumentation, ISSN 0955-5986, E-ISSN 1873-6998, Vol. 9, no 3, 143-152 p.Article in journal (Refereed) Published
Abstract [en]

This work describes an in situ method for the testing of mechanical flow meters. The method was developed on diaphragm gas meters, but can be applied to most mechanically-based flow meters. The proposed fingerprint method analyses the behaviour of the meter during a work cycle. The result from the analysis is a ''fingerprint'' of the meter, in which mechanical errors in the meter can be detected. This is explained by the mechanical connection between the sensing mechanism and the mechanical output from the meter. An error analysis of a diaphragm meter was carried out to deduce the type of errors that are likely to occur in such meters. The most severe malfunctions are leakage, internal friction and liquid in the meter. These errors can either lead to measuring errors or can cause the meter to cease functioning. The fingerprint method has been tested on meters with simulated errors and on used meters taken from the gas grid in Lund. The fingerprint method can correctly diagnose errors such as leakage, increased friction and liquid in the meter.

Research subject
Industrial Electronics
Identifiers
urn:nbn:se:ltu:diva-4197 (URN)10.1016/S0955-5986(98)00024-7 (DOI)21c06de0-68da-11db-8cbe-000ea68e967b (Local ID)21c06de0-68da-11db-8cbe-000ea68e967b (Archive number)21c06de0-68da-11db-8cbe-000ea68e967b (OAI)
Note
Godkänd; 1998; 20061029 (ysko)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2017-06-09Bibliographically approved

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