A pump is drawing water from a reservoir through a suction pipe of 10.5 m long with the inside diameter of 35 mm at a rate of 2.3 l/s. The pipe is smooth so that the friction factor is given by f = 0.316 Re-0.25 where Re is the pipe Reynolds number and there are other minor losses like the pipe entrance and a control valve with a total loss of 0.58 m. If the maximum net positive suction head of the pump is 2.1 m calculate the suction head for a satisfactory pump operation without the risk of cavitation. Assume water density and dynamic viscosity as p = 1000 kg/m3 and μ = 0.001 kg/ms, respectively and take water vapors pressure as 5.5 kPa and the atmospheric pressure as 100.3kPa.
Assumptions: Take g = 9.81 m/s2 and the density and kinematic energy of water as 1000 kg/m3 and 1 × 10-6 m2/s
The question belongs to Chemistry and it discusses about calculating the suction head for pump operation without risk cavitation.
Total Word Count 120
Download Full Solution
If you are here for the first time, you can request for a discount coupon, which can knock off upto 20% of the quoted price on any service.