The Thermodynamic Efficient Measurement provides a powerful tool to establish performance characteristics of rotating machinery. The fundamental principle rests on accurate measurements of the temperature difference of the fluid up and downstream of the unit investigated. The temperature drop typically being in the tens of milli – Kelvins. For hydroturbine units the IEC 41 outlines the measurement procedure. The FDB Eta software takes this procedure a step further, in that it allows the instantaneous calculation of efficiency. In this way, FDB Eta allows the instant control of captured data, and if doubtful results makes on-site corrective measures possible.
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