Multi Pump Test Rig Data n Calculation

READI NG

PRESS URE (m.H2O )

VACUU M (m.H2 O)

PUMP HEAD (m.H2 O)

1)1520

2.5

0.4

2.1

2)1405

2.2

0.3

1.9

VOLU ME (ltr)

5 5

3)1304

1.9

0.2

1.7

5

4)1200

1.7

0.1

1.6

5

5)1106

1.5

0.0

1.5

5

6)1006

1.3

0.0

1.3

5

TIM E (s)

FLOW RATE (m3/s)

5.7 5 5.8 8 6.6 5 7.4 6 8.5 0 9.2 0

8.7x10

TORQ UE (N.m)

1.95

-4

8.5x10

1.7

-4

7.5 x10-4 6.7 x10-4 5.9 x10-4 4.4 x10-4

1.54 1.43 1.23 1.13

DATA COLLECTION

READING 1(Calculation sample) Pump Head, H

= Pressure(m.H2O) - Vacuum(m.H2O)

= 2.5 – 0.4 = 2.1 m.H2O

Flow Rate,Q

= V(m3)/t(s) = 0.005/5.75 =8.7x10 -4 m3/s

Input Power,Pin = 2πN/60 x T = 2π(1520)/60 x 1.95 = 310.89 W Hydraulic Power,Po

= ρ.g.Q.H = (1000)(9.81)(8.7x10-4)(2.1) =17.92 W

Efficiency,η = Po/ Pin

INPU T POW ER (W) 310.8 9 250.1 23 210.2 94 179.6 99 142.4 59 119.6 43

HYDRA ULIC POWE R (W) 17.92

EFFICIE NCY (%)

5.76

15.85

6.34

12.54

5.96

10.52

5.85

8.65

6.07

6.93

5.79

= 17.92/310.89 = 5.76%