Question

Pump A: Q(m3/s) 0 0.006 0.012 0.018 0.024 0.030 0.036 H (m) 22.621.9 20.3 n(%) 10 3.9 28 14.2 9.7 32 74 86 85 Pump B: m3/s H (m) 16.2 n(%) 10 0.006 0.012 0.018 0.024 0.030 0.036 13.6 14 11.6 110.7 60 11.9 6.4 34 80 80 60 One of the pumps is required to lift water continuously through 3.2 m of vertical lift and the pipe to be used is 21 m long, 10 cm diameter and friction coefficient is 0.02. (20 pts) (5 pts) (a) Determine the pump power and the flow rate for the two pumps (b) Select the more suitable pump for this duty and justify your selection.

Answer 1

One of to pumps is required to lift water continuously through. vertical lift and pipe. given data length L = 21 m diameter d = 10 cm pricition conficient = 0.02 we are select to suitable pump is pump A Because pump head is uses then the pump B head. * And also we know that input is directly proportional to head developed. fo rall Therefore less power is required Now calculate to input power p/deal = eq wh_1 Bc = Fca^r/120 ^5 = 0.02 times (2) times (0.36)^2/12 times (0.1)^5 = 5.4432 times 10^-4/1.2 times 10^-9 h_1 = 4.536m