eficiencia de las bombas y de los ventiladores

Calculation of the efficieny:

1. Enter volume flow V at best efficiency point.
2. Enter the pump head H at best efficiency point.
3. Enter power reserve S.

The minimum efficiency at best efficiency point will be calculated according to EU 547-2012 (η1,BEP) using flow, head, speed and pump type. In addition the minimum efficiencies at 75% volume flow (partial load, PL) and 110% volume flow (overload, OL) will be determined.
The efficiency of the gearbox and the coupling will be set to 1 (η2=1).
With factor S (1 <= S <= 2) you determine how much reserve output a IEC norm motor should at least have. The rated power P_n will be chosen from the following rating chart.

Pn [kW]	0.75	1.1	1.5	2.2	3.0	4.0	5.5	7.5	11	15
Pn [kW]	18.5	22	30	37	45	55	75	90	110	132

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