what is a rough estimate of the pump efficiency for a 115 Ho

what is a rough estimate of the pump efficiency for a 1/15 Horse power pump ? pipeline has a height of 1.4meters
I\'ll say around 60%.

Solution

depends on the head coefficient and sp speed. Too few parameters given.

a 1/15 hp pump works at 1/15 *550 ft lbf/s = 36.67 ft lbf/s

for a height of 1.4 m = 4.62 ft, this is a force of 7.94 lbf

Depending on the pipe dia, a velocity of flow is found

From typical pump curves (See sabersky p 449) , loading coeff is about .4

From loading coeff alone, the standard curves give a lower efficiency about 35%