Comparison of Model-Based Flow Rate Estimation Methods in Frequency-Converter-Driven Pumps and Fans
Tamminen, Jussi; Viholainen, Juha; Ahonen, Tero; Ahola, Jero; Hammo, Simo; Vakkilainen, Esa (2014)
Jussi Tamminen, Juha Viholainen, Tero Ahonen, Jero Ahola, Simo Hammo, and Esa Vakkilainen (2014) Comparison of Model-Based Flow Rate Estimation Methods in Frequency-Converter-Driven Pumps and Fans. Energy Efficiency, Vol 7, Issue 3, pp 493-505. The final publication is available at Springer via http://dx.doi.org/ 10.1007/s12053-013-9234-6
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Model-based pump or fan monitoring methods implemented in variable speed drives have proven to be able to give information on the system output without additional metering; however, the current model-based methods may not be usable or sufficiently accurate in the whole operation range of the fluid handling device. To apply model-based system monitoring in a wider selection of systems and to improve the accuracy of the monitoring, this paper proposes a new method for pump and fan output monitoring with variable-speed drives. The method uses a combination of already known operating point estimation methods. Laboratory measurements are used to verify the benefits and applicability of the improved estimation method, and the new method is compared with five previously introduced model-based estimation methods. According to the laboratory measurements, the new estimation method is the most accurate and reliable of the model-based estimation methods.
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