- Ah M Or P 10 Kw Efficiency 7 600 500 400 300 200 100 0 0 100 95 90 85 80 75 70 65 60 55 50 45 0 2 Un T Oos Am P Q 1 (80.89 KiB) Viewed 50 times
answers because they are WRONG. Thank you
AH (m) or P (10 kW) Efficiency 7,% 600 500 400 300 200 100 0.0 100 95 90 85 80 75 70 65 60 55 50 45 0.2 UN T oos AM P-Q AH-Q 7-Q Poly. ~Q Poly. (AH-Q) Poly.(n-Q) 02 0.6 0.8 1.0 Q (³¹) Figure 1. The dimensional performance curves of the pump. 0.3 0.5 11g 1.0 1.5 2.0 3.0 4.0 7 Radial-flow Mixed-flow €1 N₂ Figure 2. Specific speed curves for pump selection. Axial- flow 12 10 0.9 0.8 0.7 0.6 05 04 03 02 0.1 0.0 2.5 2.0 1.5 1.0 0.5 0.0 10,000 15,000 4.
28 pts | Problem I: Figure 1 shows the dimensional performance curves of a pump with an impeller size of 50 cm. The pump, which is installed at an elevation of 210 m and rotates at an angular speed of 3600 rpm, is used to pump 20°C water (y = 9.789 kN/m³, p. = 2.34 kN/m² abs, v = 1.003×106 m²/s) from a reservoir with a water surface elevation of 350 m to a reservoir with a water surface elevation of 450 m through a 25-cm-diameter steel pipe. The pipe has a total length of 610 m, of which 200 m is the suction line. The pipe has a Darcy-Weisbach friction factor of f = 0.015, an entrance loss coefficient of 0.5, and an exit loss coefficient of 1.0. Any other losses are negligible. Figure 2 shows the specific speed curves for pump selection. For the pump, determine the: (1) Specific speed (n.) and type 4 pt 10 pt (2) Operation point, efficiency, output power, brake power, and power transferred to water 6 pt(3) Coefficients of CH, Co, and Cp at the operation point 8 pt(4) Net positive suction head (NPSH) and cavitation number (6)