Consider the pump and piping system of Problem 10.51. Estimate the percentage reductions in volume flow rate that occur after

(a) 20 years 

(b) 40 years of use, if the pump characteristics remain constant. Repeat the calculation if the pump head is reduced 10 percent after 20 years of use and 25 percent after 40 years. Use the data in the table below for the effect of age on the multiplier of the friction factor.

Data From Problem 10.51

Transcribed Image Text:

Pipe Age (years) Small Pipes, 4-10 in. Large Pipes, 12-60 in. New 1.00 1.00 30 2884887 10 2.20 1.60 20 5.00 2.00 7.25 2.20 40 8.75 2.40 50 9.60 2.86 60 10.0 3.70 70 10.1 4.70