An 80-percent-efficient pump with a power input of 30 hp is pumping water from a lake to a nearby pool at a rate of 1.5 ft³/s through a constant-diameter pipe. The free surface of the pool is 80 ft above that of the lake. Determine the mechanical power used to overcome frictional effects in piping. We take the density of water to be p = 62.4 lbm/ft³. The mechanical power used to overcome frictional effects in piping is hp.

An 80-percent-efficient pump with a power input of 30 hp is pumping water from a lake to a nearby pool at a rate of 1.5 ft³/s through a constant-diameter pipe. The free surface of the pool is 80 ft above that of the lake. Determine the mechanical power used to overcome frictional effects in piping. We take the density of water to be p = 62.4 lbm/ft³. The mechanical power used to overcome frictional effects in piping is hp.

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter5: Analysis Of Convection Heat Transfer

Section: Chapter Questions

Problem 5.37P

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