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A speed of sound based feed water temperature sensor
RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Volym, flöde, temperatur o densitet.
RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Volym, flöde, temperatur o densitet.
RISE, SP – Sveriges Tekniska Forskningsinstitut.
RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Mätteknik, Volym, flöde, temperatur o densitet.
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2012 (English)In: 9th International Temperature Symposium on Temperature, 2012, Vol. 1552, p. 925-930p. 925-930Conference paper, Published paper (Refereed)
Abstract [en]

Controlling thermal power in the feed water line of a power plant presupposes both accurate flow and temperature measurement. In this application the temperature measurement is usually a single Pt-100. This results in a measurement error of several kelvin. In this study we have investigated two different sensors based on the speed of sound (SoS) in the flowing medium for measuring the average temperature across a flow pipe cross-section. This is a task within the on-going European research project called ENG-06. The two SoS-based temperature measuring sensors were investigated under laboratory conditions. Investigations were done using both homogenous and non-homogenous temperature distributions with temperature differences up to 25 K. In addition the influence of pressure (50-200 kPa) and flow rates (0.5-2 m/s) on the SoS devices were also investigated. Our results show that the SoS-based temperature principle is working. Furthermore, depending on the measurement conditions a SoS temperature measurement device significantly can reduce the deviation to the reference sensor compared with a single Pt-100 sensor. Relative reductions in the deviation to the reference of 20-85 % were possible to achieve. This opens for the possibility of increasing the energy efficiency in power plants as aimed for in the ENG-06 project.

Place, publisher, year, edition, pages
2012. Vol. 1552, p. 925-930p. 925-930
Series
AIP Conference Proceedings, ISSN 0094-243X ; 1552
Keywords [en]
Fluid temperature, Platinum Resistance Thermometer, Ultrasound thermometer
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-12337DOI: 10.1063/1.4819668Scopus ID: 2-s2.0-84885003772Local ID: 16003OAI: oai:DiVA.org:ri-12337DiVA, id: diva2:970159
Conference
9th International Temperature Symposium on Temperature: Its Measurement and Control in Science and Industry, ITS; Los Angeles, CA; United States; 19-23 March 2012
Available from: 2016-09-13 Created: 2016-09-13 Last updated: 2021-06-16Bibliographically approved

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