CALCULATE POWER SUPPLIED TO THE PUMP TO MAINTAIN Q. (USE ENERGY EQN INCLUDE MINO

Question

CALCULATE POWER SUPPLIED TO THE PUMP TO MAINTAIN Q. (USE ENERGY EQN INCLUDE MINOR FRICTION) CHANGES MADE TO THE PUMP DECREASE SOLUTION LINE (1.5 M) DECREASE LENGTH L DISCHARGE (213.4 M) ADD FULLY OPEN GATE VALUE IN THE SECTION LINE INCREASE DISCHARGE LINE SIZE FROM 1.052.5 M ADD A CHECK VALUE K = 1.8 REPLACE THE GLOBE VALUE W/A WIDE OPEN GATE VALUE REPLACE W/FULLY OPEN GLOBE VALUE IS THERE, IS THERE A SAVING? IF SO, HOW MUCH COMPARISON? RECALCULATE POWER NEEDED TO SUPPLY TO THE PUMP AND COMPARE POWER IN BEFORE TO PIN AFTER.

Explanation / Answer

A simple demonstration of how the Grashof number arises in free convection is to consider a parcel of light fluid, rho less than rho not, rising a distance x due to buoyancy. Equate the decrease in potential energy of the parcel to its increase in kinetic energy to form a characteristic "velocity" of the parcel. Use this velocity-scale to form a Reynolds number Re_x and then interpret its square, Re_x^2.

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