Answer Happy

Problem 2 (1 point)
Figure below shows the performance curve family of Model 5009
Centrifugal pumps of Taco
Pump Inc., running at a fixed speed of N = 1160 rpm. For the pump
with the impeller diameter D
= 8.625 in., you are asked to do the following:
(a) Determine the best efficiency point (BEP) of the given pump,
including the flow rate (Q*),
the pump head (hp*), the pump efficiency (𝜂*), the brake horsepower
(BHP*), and the
NPSH* of the pump.
(b) Calculate the corresponding discharge coefficient (CQ*), the
head coefficient (CH*), and
the power coefficient (CP*) of the given pump at BEP if water is
the fluid.
Taco NPSH Model 5009 FI & CI Series 15 20 25 1160 RPM FEBRUARY 19. 2002 35 40 45 Curve no. 2140 Min. Imp. Dia 6.75" Size 6 x 5 x 9.0 50 55 60 L/SEC 5 10 30 50 NC FEET 15 12 9 6 3 0 REQUIRED NPSH 45 36 27 18 9 0 DOCKPA 352 459 75% 79% -100 10 8 HEAD IN FEET 40 9.25" (235mm) 8.625" L 30 (219mm) 8.00" (203mm) 7.375" (187mm) 20 6.75" (171mm) 26 8 80 77% 75% 12 MAX 72% 289 7.5HP(5.6KW) 6 -60 X Y 209 HEAD IN METERS HEAD IN KILOPASCALS de & 4 40 1 10 159 35% BHP(3.7KW) (2.2KW) 2HP(1.5KW) 2 20 CURVES BASED ON CLEAR WATER WITH SPECIFIC GRAVITY OF 1.0 1.5HB (1.1KW) 3HP 875 1000 125 250 375 500 625 750 FLOW IN GALLONS PER MINUTE