Sentence examples for best efficiency point and from inspiring English sources
Nondimensional pump curves are obtained by expressing head, flow rate, power input, and efficiency as percentages of the corresponding values at the best efficiency point, and such curves are useful for comparing the hydraulic properties of pumps belonging to the same type and assessing the performance of pumps of different specific speeds for various applications.
The efficiency is maximum at the best efficiency point and gets reduced uniformly to the right of the best efficiency point.
A large number of studies have been reported on the prediction of head and flow rate conversion factors (h and q) at the best efficiency point (BEP) between pump and turbine mode, but the theoretical and experimental correlations are usually valid only within a certain range of specific speeds for pumps.
Figure 6 shows the time domains of the pressure fluctuations on the best efficiency point at measurement points S1, S2, and S3 on the wall of the semi-suction chamber.
The best efficiency point shifted towards higher flow rate with h/b reducing, and the high efficiency area was broadened by using half vane diffusers.
Based on the results, the flow rate of numerical best efficiency point (BEP) is very close to that of theoretical BEP, and the flow rate of BEP increases with extending the blade inlet angles.
The amplitudes of pressure fluctuations on half blade passage frequency at 0.2 and 1.2 Qn are 3.9 and 1.6 times of that at the best efficiency point, respectively.
In the volute casing, a pronounced pressure fluctuation pattern can be caused by the interaction between the impeller blades and the volute tongue [24, 25]. Figure 10 illustrates the time domains and their corresponding spectral domains at the best efficiency point on measurement point P1.
This value depends on the PAT's (pump's) operating speed nPAT (n pump) as well as on its absorption capacity Q opt (supply discharge q opt), and hydraulic head H opt (pumping head h opt) at best efficiency point.
