The document is an analysis of a centrifugal pump submitted by Mohammad Shahbaz to his professor Aditya Mishra. It discusses the working mechanism of centrifugal pumps, including their components, power and efficiency calculations, and advantages and disadvantages. Centrifugal pumps work by converting mechanical energy to hydraulic energy using centrifugal force on liquids. They are commonly used to move liquids through piping systems and have rotating impellers and stationary casings.

1. MAJOR ASSIGNMENT
SUBJECT-R.A.C.
TOPIC –ANALYSIS OF CENTRIFUGAL PUMP
SUBMITTED BY SUBMITTED TO
MOHAMMAD SHAHBAZ MR. ADITYA
MISHRA
U.I.D.-K10611 ASST. PROFESSOR M.E.
BRANCH-M.E. DEPT. CPU

2. WHAT IS CENTRIFUGAL PUMP?
WORKING MECHANISM OF A
CENTRIFUGAL PUMP
POWER AND EFFICIENCY
CALCULATION.
COMPONENTS OF CENTRIFUGAL
PUMPS
ADVANTEGAES AND
DISADVANTAGES OF
CENTRIFUGAL PUMPS

3.  Convert the mechanical
energy into hydraulic energy
by centrifugal force on the
liquid
 Constitute the most common
type of pumping machinery
 Used to move liquids through
a piping system
 Has two main components:
1. Stationary componets,
casing, casing cover and
bearings
2. Rotating components,
impeller and shaft
 Classified into three
categories ; Radial Flow,
Mixed Flow, Axial Flow

4. Simplest piece of
equipment in any process
plant
Energy changes occur by
virtue of impeller and
volute
Liquid is fed into the
pump at the center of a
rotating impeller and
thrown outward by
centrifugal force
The conversion of kinetic
energy into pressure
energy supplies the
pressure difference
between the suction side
and delivery side of the
pump
Liquid flow path
inside a
centrifugal pump

5. •The power supplied to the pump:
Where m=mass flow rate, kg/s
∆H= total discharge head,
N.m/kg
η=efficiency
…………(1)

6. •The power delivered to the fluid:
…………(2)
•From equations (1) and (2) efficiency:

7. nq is the specific speed for a unit machine that
is geometric similar to a machine with the head
Hq = 1 m and flow rate Q = 1 m3
/s
43q
H
Q
nn ⋅=
qs nn ⋅= 55,51

8. Three basic
components:
Volute, casing,
body
or Diffuser
Impeller
or impellers
Driver (motor)

9. Centrifugal Pumps
Vanes
Direction of
rotation

10. Centrifugal Pumps
• Open
• Semi-open
• Closed
- Single suction
- Double suction
• Non-clogging
• Axial flow
• Mixed flow

11. Maximum efficiency lies in the
range:
2000<NS<3000
High head, low capacity pumps:
500<NS<1000
Low head, large capacity pumps:
NS>15000

12. Centrifugal Pumps
Rotation
Impeller
Blades
Vt
V
r
V
s
Vr = Radial Velocity
Vt = Tangential Velocity
Vs = Vector Sum Velocity

13. Centrifugal Pumps
Suction Eye
Cutwater
Arrows represent the
direction of water flow Discharge
Nozzle

14. Advantages
Simple in construction and cheap
Handle liquid with large amounts of
solids
No metal to metal fits
No valves involved in pump operation
Maintenance costs are lower

15. Disadvantages
Cannot handle highly viscous fluids efficiently
Cannot be operated at high heads
Maximum efficiency holds over a narrow range
of conditions