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Presentation on Pumps

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Presentation on Pumps By G.MURALIKRISHNA EE(E) BSNL ED-1 Energy conservation opportunities in pumping Conduct water balance to minimize water consumption. – PowerPoint PPT presentation

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Title: Presentation on Pumps


1
Presentation on Pumps
  • By
  • G.MURALIKRISHNA
  • EE(E) BSNL ED-1

2
An Overview
  • Types of Pumps
  • Features of various Pumps
  • Selection of pumps
  • Performance Calculation
  • Flow control strategies
  • Energy saving measures in Pumps

3
Types of Pumps
  • Dynamic Pumps
  • Centrifugal
  • Special effect pumps
  • Displacement Pumps
  • Rotary
  • Reciprocating

4
Order of Preference
  • Centrifugal
  • Rotary
  • Reciprocating

5
Pumps Used in Building Services
  • Sump Pumps
  • Monobloc
  • Bore well Pumps
  • Submersible Pumps
  • Jet Pumps

6
Centrifugal Pumps
  • Very simple design
  • Two main parts are the impeller and the diffuser
  • Impellers
  • Bronze
  • poly carbonate
  • cast iron
  • stainless steel

7
Pressure developed by the Pump
  • depends upon
  • Impeller dia
  • No.of impellers
  • size of the impeller eye
  • shaft speed

8
Size of the pump
  • Depends on
  • Head
  • Capacity

9
Advantages of centrifugal Pump
  • Very efficient
  • Produce smooth and even flow
  • Reliable with good service life

10
Disadvantages
  • Loss of priming easily
  • Efficiency depends upon operating design head
    speed.

11
Submersible Pumps
  • Centrifugal pump closely coupled with motor
  • Does not require long drive shaft
  • Motor operates at a cooler temperature.
  • Noiseless operation.
  • High efficiency
  • Smooth and even flow
  • In case of repair full pump to be removed.

12
Jet Pumps
  • Combination of a surface centrifugal pump, nozzle
    and venturi arrangement.
  • Used in small dia bore wells.
  • Simple design
  • Low purchase and maintenance cost.
  • Easy accessibility to all moving parts.
  • Low efficiency.

13
DSM measures to reduce consumption in pumps
  • Demand side management measures
  • Use of friction less foot valve.
  • Use of HDPE pipes
  • Use of appropriate capacitor.
  • Use of higher size suction pipe compared to
    delivery pipe.

14
Pump Performance calculation
  • Overall Efficiency Hydraulic power ( P2) X
    100/ Power input ( P1)
  • Pump efficiency. Hydraulic power ( P2) X
    100/ Power input to pump shaft ( P3)
  • Hydraulic Power ( P2) Q X Total Head ( hd -
    hs ) X p X g / 1000
  • Q discharge in m³/s

15
  • p density of fluid in kg/ m³
  • g acceleration due to gravity ( m/s²)
  • P1 1.732 X V X I X pf
  • P3 P1 X eff.of motor.

16
Key Parameter for determining efficiency
  • Flow
  • Head
  • Power

17
Flow Measurement Techniques
  • Tracer Method
  • Ultrasonic flow measurement
  • Tank filling method
  • Installation of online flow meter

18
Determination of total head
  • Suction head
  • measured from pump inlet pressure gauge reading
  • Discharge head
  • This is taken from the pump discharge side Pr.
    gauge

19
Typical name plate details of pump
  • Pumps (Monoblock Pumps used for Drinking water)
  • Sl.No ITEM Pump1 Pump2
  • 1 Make Beacon Beacon
  • 2 Capa hp/kW 5 (3.7) 5 (3.7)
  • 3 Pipe sizes S/D 65/50 mm 65/50 mm
  • 4 Head 25 m
    25 m

20
Typical name plate details of pump
  • 5 Discharge 8 L/s 8 L/s
  • 6 Amps 8
    8
  • 7 Overall Efficiency 47
    47

21
Typical performance calculations
  • PUMP EFFICIENCY CALCULATION SHEET
  • SL.NO. ITEM Pump1 Pump2 Units
  • 1 Voltage 406 407 volts
  • 2 Current 6.0 6.6 amps
  • 3 P.F 0.83 0.82
  • 4 Power input 3.5 3.48 KW

22
Typical performance calculations
  • 5 Dis. Head 22.2 22.2 m
  • 6 Suc.Head 2.2 2.2 m
  • 7 discharge 8 8 L/s
  • 8 Hyd.Power 1.57 1.57 KW
  • 9 Pump Effi. 44.85 45.10

23
Typical observations/ Recommendations
  • 1. Replace the existing discharge line with the
    50 mm dia pipes to reduce the friction losses.
  • 2. Provide water level switch to switch off the
    pump sets as soon as the Tank is filled.
  • 3. Replace the existing pump sets with high
    efficiency pump sets.

24
Factors to be considered from user side
  • Size pump correctly
  • Operate close to the best efficiency point.
  • Size all piping and valves correctly
  • Avoid all leakages.

25
Flow control Strategies
  • Varying speed
  • Pumps in parallel
  • stop/start control
  • Flow control valve
  • By pass control valve
  • Trimming impeller
  • Use of VFDS

26
Energy conservation opportunities in pumping
  • Operate pump near best efficiency point.
  • Replace old pumps by energy efficient pumps
  • Reduce system resistance by pressure drop
    assessment and pipe size optimization.
  • Provide booster pump for few areas of higher
    head.

27
Energy conservation opportunities in pumping
  • Conduct water balance to minimize water
    consumption.
  • Ensure availability of instruments like pressure
    gauges, flow meters.
  • Repair seals and packing to minimize water loss.
  • Avoid valves in discharge side as far as
    possible.
  • Operate pumpset during non-peak hours.

28
Thank You
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