For a pumping system with dynamic head of 62.2 m, the pump delivers 441 m'/h at a rotational speed (n) of 1241 rpm at 80% efficiency (Mpump). The pump operates at an elevation of 1000 m (hoperation) above the sea level and the temperature is 20C. Determine the following:

1

a) Pump flow rate, Q in mmin

(2 marks)

b) Specific speed (ns)

(2 marks)

c) Value of K in S.I. unit at 80% pump efficiency

(2 marks)

d) Cavitation constant (o)

Given:

(2 marks)

e) Net positive suction head at cavitation inception (NPSHi)

Question 2 For a pumping system with dynamic head of 62.2m, the pump delivers 441m3/h at a rotational speed (n) of 1241rpm at 80% efficiency (pump). The pump operates at an elevation of 1000m(hoperation) above the sea level and the temperature is 20C. Determine the following: 1 a) Pump flow rate, Q in m3/min (2 marks) b) Specific speed (ns) (2 marks) c) Value of K in S.I. unit at 80% pump efficiency (2 marks) d) Cavitation constant () Given: =106KnS4/3 (2 marks) e) Net positive suction head at cavitation inception (NPSHi)