Question

A pump carries water at a temperature of 30 ° C from one tank (A) to another (B). The diameter of the pipe leaving tank A and reaching the pump is 4 inches. The diameter of the pipe leaving the pump and reaching tank B is 3 inches. The pump motor increases the fluid pressure by 3 kgf / cm2 (ΔP), and generates a power per unit of mass of 300 J / kg. Calculate the height difference (ΔZ) between the end of the pipe leading to tank B (discharge) and the water surface of tank A. Schedule 80 commercial steel pipe. Pipe (4 inches): Pipe length: 20 m; rounded outlet; fully open gate valve; 90 ° elbow without guide vanes. Pipe (3 inches): Pipe length: 50m; two 90 ° elbows without director blades.

B AZ A

Answer 1

solation, Criven, С. Ap= 3 kgf cm² B W . 3003/kg Δz m А cu? cin? per unit wass, Diameter of pipe Learning touk A = Da = 4 inch = 0.1016m Diameter of pipe reaching tank B = Dy a 3 inch = 0.0762m 1kgf. 980 66.5 Nous Pi-P = Ap= 3kyf 294200 Nyon? Applying Bernoulli equation between point A and C pi eft Pe +92 + 4 Р P.-P2 시 Р 294200 Nominn 30003 1000 kg Kg AZ =335.8m AZ = 33580 cm AZ = 13220. 472 inch Ans + + Р + g 22 m g (Z₂-2,) 9.&1 AZ

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