| 摘要 |
A method for determining power and energy saving, preferably by rotation speed regulation/speed control of rotodynamic machines, i.e. primarily pumps, fans, turbo- compressors and agitators, relative to another type of regulation, where a constant rotation speed is used. Primarily, a power saving &Dgr;P, &Dgr;P′, &Dgr;P″ is determined, which, after integration over time, yields an energy saving. The method is characterized in that the shaft speed n and the shaft power P1 of the machine or a power depending on the same, are measured directly or indirectly and that the required power P0, P0′, P0″ is calculated from the affinity laws. During throttle regulation with a regulating valve, a power P2 at full rotation speed is determined from, among other things, the slope of the power curve kp. The power saving is then constituted of &Dgr;P=P2−P1 for throttle regulation, and &Dgr;P′=P0′−P1 and &Dgr;P″=P0″−P1, respectively, for some other regulating methods. Losses in prime mover as well as in rotation speed control equipment are taken into account for refining the size of the saving. The parameters required for power determination are refined from the values measured during operation according to the foregoing through a continuously adaptive method.
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