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Detection of pulsating flows in an ultrasonic flow meter
Luleå tekniska universitet, Institutionen för system- och rymdteknik, EISLAB.ORCID-id: 0000-0002-4133-3317
2002 (engelsk)Inngår i: Proceedings of the 8th International Symposium on District Heating and Cooling, 2002Konferansepaper, Publicerat paper (Fagfellevurdert)
Abstract [en]

Transit-time ultrasonic flowmeters present advantages for district heating applications, since they are accurate, non-intrusive, and cheap. However, such flowmeters are sensitive to velocity profile variations since the flow rate is measured in the volume area between two ultrasonic transducers. Ultrasonic flowmeters are therefore sensitive to installation effects. Installation effects could be either static or dynamic. A pulsating flow is a dynamic installation effect. In the field, the diagnostic can only be performed with the measured flow rate. Flow measurements with and without pulsating flow have been recorded in a flow meter calibration facility. The detection of a pulsating flow can be made by using Hinich's harmogram. It is possible to detect harmonics that emerge from the noise by using the harmogram.

sted, utgiver, år, opplag, sider
2002.
HSV kategori
Forskningsprogram
Industriell elektronik
Identifikatorer
URN: urn:nbn:se:ltu:diva-32604Lokal ID: 725761e0-e83d-11db-b9a9-000ea68e967bOAI: oai:DiVA.org:ltu-32604DiVA, id: diva2:1005838
Konferanse
International Symposium on District Heating and Cooling : 14/08/2002 - 16/08/2002
Prosjekter
Fjärrvärme
Merknad

Godkänd; 2002; 20070328 (pekkari)

Tilgjengelig fra: 2016-09-30 Laget: 2016-09-30 Sist oppdatert: 2017-11-25bibliografisk kontrollert

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