Conclusion Laser-based on-site calibration bridges the gap between laboratory calibration and everyday operation. By combining accredited laser metrology, automated field measurements and rigorous uncertainty evaluation, utilities can verify the accuracy of installed large flow meters under real operating conditions. As district heating systems become increasingly digital and efficiency-driven, reliable measurement data will remain a key prerequisite for sound technical, commercial and regulatory decisions.
Abbreviations FM Flow meter
LDV Laser Doppler velocimetry
OSC On-site calibration
References [1] ISO 3966:2008. Measurement of fluid flow in closed conduits – Velocity area method using Pitot static tubes. ISO Standard, 2008.
[2] EN ISO/IEC 17025:2018-03. General requirements for the competence of testing and calibration laboratories. ISO Standard, 2018-03.
[3] AGFW – Der Energieeffizienzverband für Wärme, Kälte und KWK e.V. “EnEff. Wärme – Energieeffizienz in der Fernwärme durch Vor-Ort-Kalibrierung von Durchflussmessgeräten – Kopplung von laseroptischen und numerischen Verfahren”. Joint Final Report by the Partners ILA R&D GmbH, OPTOLUTION Messtechnik GmbH, Physikalische-Technische Bundesanstalt, Technische Universität Berlin, VATTENFALL Europe Wärme AG, AGFW, Forschung und Entwicklung, Issue 46, Frankfurt/Main, 2018. [4] Müller, U.; Dues, M.; Hübert, W.; Rautenberg, C.: Improving operational efficiency of power plants through on-site calibration of flow sensors. 16th International Symposium on District Heating and Cooling, DHC2018, 9–12 September 2018, Hamburg, Germany. DOI 10.1016/j.egypro.2018.08.183
For further information please contact: Dr. Ulrich Müller, mueller@optolution.com
19 www.dbdh.dk
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