- 6 A Centrifugal Pump Is To Be Placed Above A Large Open Water Tank To Pump Water At A Rate Of 1 4 X 10 2 M3 S 1 As Sho 1 (89.72 KiB) Viewed 37 times
- 6 A Centrifugal Pump Is To Be Placed Above A Large Open Water Tank To Pump Water At A Rate Of 1 4 X 10 2 M3 S 1 As Sho 2 (89.72 KiB) Viewed 37 times
- 6 A Centrifugal Pump Is To Be Placed Above A Large Open Water Tank To Pump Water At A Rate Of 1 4 X 10 2 M3 S 1 As Sho 3 (97.42 KiB) Viewed 37 times
6. A centrifugal pump is to be placed above a large, open water tank to pump water at a rate of 1.4 x 10-2 m3 s-1 as shown in Figure Q6. At this flow rate, the required NPSH, NPSHR is 4.5m as specified by the pump manufacturer. The water is at 300 C at the atmospheric pressure is 101.3 kPa. Assume that the water density, p is 1000 kg m³. The pipe diameter, D is 10 cm. (2) Reference plane P1 = Patm (1) Z1 Figure Q6 a) Find the loss by friction, EF, given a minor loss coefficient, KL is 20. Ans: 3.3 m b) Determine the available NPSH when the water vapour pressure, P, is 4.243 kPa. Ans: 2.09 m
5. Air is flowing through a venture meter whose diameter is 5.0 cm at the entrance and 3.5 cm at the throat. The gauge pressures, P₁ and P2 are measured to be 101.3 kPa bar at the entrance and 95 kPa at the throat respectively. Neglecting frictional effects (i.e. Cv the experimental coefficient for venture meter can be neglected): a) Show that the volumetric flow rate can be expressed as: 2 (P₁-P₂) v = A₂ 2 4-01] A₁ where A₁ and A2 the cross sectional areas at the entrance and throat section and p the air density that is taken as 1.00 x 10-3 kg/m³. b) Determine the air flow rate. Ans: 4.48 ft³/s 3