Question

If a pump with the characteristic curve shown in the accompanying graph (Figure 2) is used to pump water from the lower to the upper tank (water flows from Tank 2 to Tank 1 in this question) shown in Figure 1. Use information provided in Figure 1 and assume that diameter of pipe AB is 600 mm (DAB 600 ) and diameter of pipe BC is 300 mm DBc 300 mm) a. Find the operation point of this systenm b. Calculate the power to operate the pump, if pump efficiency is 70% h (m) 45 30 N1100 rpm 15 0 0.15 0.30 0.45 Figure 2 Water flows from Tank 1 to Tank 2 as shown in Figure 1. The water temperature in the system is 20° C. It is desirable to have a discharge of 0.57 m/s from Tank 1 to Tank 2. Knowing the diameter of pipe AB is twice the diameter of pipe BC, find the diameter of both pipes. Assume f-0.020 for both pipes. Ignore minor losses Tank 1 EL. 100 m A LAB-1500 m Tank 2 EL. 85 m LBc 100 nm f= 0.020 f 0.020 Figure 1

Answer 1

0.5チ AB A B オ tyr.v 160ーー Pa.tw+5t hAB t hbc 2 2 d 6c dAB dAD dAD0 16 12 5 64 O. 16788 SGG hm CS Scanned with Camscanner