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Presentation on Pumps By G.MURALIKRISHNA EE(E) BSNL ED-1
An Overview <ul><li>Types of Pumps </li></ul><ul><li>Features of various Pumps </li></ul><ul><li>Selection of pumps </li><...
Types of Pumps <ul><li>Dynamic Pumps </li></ul><ul><ul><li>Centrifugal </li></ul></ul><ul><ul><li>Special effect pumps </l...
Order of Preference <ul><li>Centrifugal </li></ul><ul><li>Rotary </li></ul><ul><li>Reciprocating </li></ul>
Pumps Used in Building Services <ul><li>Sump Pumps </li></ul><ul><ul><li>Monobloc </li></ul></ul><ul><li>Bore well Pumps <...
Centrifugal Pumps <ul><li>Very simple design </li></ul><ul><li>Two main parts are the impeller and the diffuser </li></ul>...
Pressure developed by the Pump <ul><li>depends upon </li></ul><ul><ul><li>Impeller dia  </li></ul></ul><ul><ul><li>No.of i...
Size of the pump <ul><li>Depends on </li></ul><ul><ul><li>Head </li></ul></ul><ul><ul><li>Capacity </li></ul></ul>
Advantages of centrifugal Pump <ul><li>Very efficient </li></ul><ul><li>Produce smooth and even flow </li></ul><ul><li>Rel...
Disadvantages <ul><li>Loss of priming easily </li></ul><ul><li>Efficiency depends upon operating design head & speed. </li...
<ul><li>Centrifugal pump closely coupled with motor </li></ul><ul><li>Does not require long drive shaft </li></ul><ul><li>...
Jet Pumps <ul><li>Combination of a surface centrifugal pump, nozzle and venturi arrangement. </li></ul><ul><li>Used in sma...
DSM measures to reduce consumption in pumps <ul><li>Demand side management measures </li></ul><ul><li>Use of friction less...
<ul><li>Overall Efficiency =  Hydraulic power ( P2) X 100/ Power input ( P1) </li></ul><ul><li>Pump efficiency. =  Hydraul...
<ul><li>p = density of fluid in  kg/ m³ </li></ul><ul><li>g = acceleration due to gravity ( m/s²) </li></ul><ul><li>P1 =  ...
Key Parameter for determining efficiency <ul><li>Flow </li></ul><ul><li>Head </li></ul><ul><li>Power </li></ul>
Flow Measurement Techniques <ul><li>Tracer Method </li></ul><ul><li>Ultrasonic flow measurement </li></ul><ul><li>Tank fil...
Determination of total head <ul><li>Suction head  </li></ul><ul><ul><li>measured from pump inlet pressure gauge reading </...
<ul><li>Pumps: (Monoblock Pumps used for Drinking water) </li></ul><ul><ul><li>Sl.No  ITEM   Pump1  Pump2 </li></ul></ul><...
<ul><ul><li>5 Discharge  8 L/s  8 L/s </li></ul></ul><ul><ul><li>6 Amps   8   8 </li></ul></ul><ul><ul><li>7 Overall Effic...
<ul><li>PUMP EFFICIENCY CALCULATION SHEET </li></ul><ul><li>SL.NO. ITEM Pump1 Pump2  Units </li></ul><ul><li>1 Voltage   4...
<ul><li>5 Dis. Head   22.2   22.2  m </li></ul><ul><li>6 Suc.Head   2.2   2.2  m </li></ul><ul><li>7 discharge  8   8   L/...
<ul><li>1. Replace the existing discharge line with the 50 mm dia pipes to reduce the friction losses. </li></ul><ul><li>2...
<ul><li>Size pump correctly </li></ul><ul><li>Operate close to the best efficiency point. </li></ul><ul><li>Size all pipin...
Flow control Strategies <ul><li>Varying speed </li></ul><ul><li>Pumps in parallel </li></ul><ul><li>stop/start control </l...
Energy conservation opportunities in pumping <ul><li>Operate pump near best efficiency point. </li></ul><ul><li>Replace ol...
Energy conservation opportunities in pumping <ul><li>Conduct water balance to minimize water consumption.  </li></ul><ul><...
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Pumps

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  1. 1. Presentation on Pumps By G.MURALIKRISHNA EE(E) BSNL ED-1
  2. 2. An Overview <ul><li>Types of Pumps </li></ul><ul><li>Features of various Pumps </li></ul><ul><li>Selection of pumps </li></ul><ul><li>Performance Calculation </li></ul><ul><li>Flow control strategies </li></ul><ul><li>Energy saving measures in Pumps </li></ul>
  3. 3. Types of Pumps <ul><li>Dynamic Pumps </li></ul><ul><ul><li>Centrifugal </li></ul></ul><ul><ul><li>Special effect pumps </li></ul></ul><ul><li>Displacement Pumps </li></ul><ul><ul><li>Rotary </li></ul></ul><ul><ul><li>Reciprocating </li></ul></ul>
  4. 4. Order of Preference <ul><li>Centrifugal </li></ul><ul><li>Rotary </li></ul><ul><li>Reciprocating </li></ul>
  5. 5. Pumps Used in Building Services <ul><li>Sump Pumps </li></ul><ul><ul><li>Monobloc </li></ul></ul><ul><li>Bore well Pumps </li></ul><ul><ul><li>Submersible Pumps </li></ul></ul><ul><ul><li>Jet Pumps </li></ul></ul>
  6. 6. Centrifugal Pumps <ul><li>Very simple design </li></ul><ul><li>Two main parts are the impeller and the diffuser </li></ul><ul><li>Impellers </li></ul><ul><ul><li>Bronze </li></ul></ul><ul><ul><li>poly carbonate </li></ul></ul><ul><ul><li>cast iron </li></ul></ul><ul><li>stainless steel </li></ul>
  7. 7. Pressure developed by the Pump <ul><li>depends upon </li></ul><ul><ul><li>Impeller dia </li></ul></ul><ul><ul><li>No.of impellers </li></ul></ul><ul><ul><li>size of the impeller eye </li></ul></ul><ul><ul><li>shaft speed </li></ul></ul>
  8. 8. Size of the pump <ul><li>Depends on </li></ul><ul><ul><li>Head </li></ul></ul><ul><ul><li>Capacity </li></ul></ul>
  9. 9. Advantages of centrifugal Pump <ul><li>Very efficient </li></ul><ul><li>Produce smooth and even flow </li></ul><ul><li>Reliable with good service life </li></ul>
  10. 10. Disadvantages <ul><li>Loss of priming easily </li></ul><ul><li>Efficiency depends upon operating design head & speed. </li></ul>
  11. 11. <ul><li>Centrifugal pump closely coupled with motor </li></ul><ul><li>Does not require long drive shaft </li></ul><ul><li>Motor operates at a cooler temperature. </li></ul><ul><li>Noiseless operation. </li></ul><ul><li>High efficiency </li></ul><ul><li>Smooth and even flow </li></ul><ul><li>In case of repair full pump to be removed. </li></ul>Submersible Pumps
  12. 12. Jet Pumps <ul><li>Combination of a surface centrifugal pump, nozzle and venturi arrangement. </li></ul><ul><li>Used in small dia bore wells. </li></ul><ul><li>Simple design </li></ul><ul><li>Low purchase and maintenance cost. </li></ul><ul><li>Easy accessibility to all moving parts. </li></ul><ul><li>Low efficiency. </li></ul>
  13. 13. DSM measures to reduce consumption in pumps <ul><li>Demand side management measures </li></ul><ul><li>Use of friction less foot valve. </li></ul><ul><li>Use of HDPE pipes </li></ul><ul><li>Use of appropriate capacitor. </li></ul><ul><li>Use of higher size suction pipe compared to delivery pipe. </li></ul>
  14. 14. <ul><li>Overall Efficiency = Hydraulic power ( P2) X 100/ Power input ( P1) </li></ul><ul><li>Pump efficiency. = Hydraulic power ( P2) X 100/ Power input to pump shaft ( P3) </li></ul><ul><li>Hydraulic Power ( P2) = Q X Total Head ( hd - hs ) X p X g / 1000 </li></ul><ul><li>Q = discharge in m³/s </li></ul>Pump Performance calculation
  15. 15. <ul><li>p = density of fluid in kg/ m³ </li></ul><ul><li>g = acceleration due to gravity ( m/s²) </li></ul><ul><li>P1 = 1.732 X V X I X pf </li></ul><ul><li>P3 = P1 X eff.of motor. </li></ul>
  16. 16. Key Parameter for determining efficiency <ul><li>Flow </li></ul><ul><li>Head </li></ul><ul><li>Power </li></ul>
  17. 17. Flow Measurement Techniques <ul><li>Tracer Method </li></ul><ul><li>Ultrasonic flow measurement </li></ul><ul><li>Tank filling method </li></ul><ul><li>Installation of online flow meter </li></ul>
  18. 18. Determination of total head <ul><li>Suction head </li></ul><ul><ul><li>measured from pump inlet pressure gauge reading </li></ul></ul><ul><li>Discharge head </li></ul><ul><ul><li>This is taken from the pump discharge side Pr. gauge </li></ul></ul>
  19. 19. <ul><li>Pumps: (Monoblock Pumps used for Drinking water) </li></ul><ul><ul><li>Sl.No ITEM Pump1 Pump2 </li></ul></ul><ul><ul><li>1 Make Beacon Beacon </li></ul></ul><ul><ul><li>2 Capa hp/kW 5 (3.7) 5 (3.7) </li></ul></ul><ul><ul><li>3 Pipe sizes S/D 65/50 mm 65/50 mm </li></ul></ul><ul><ul><li>4 Head 25 m 25 m </li></ul></ul>Typical name plate details of pump
  20. 20. <ul><ul><li>5 Discharge 8 L/s 8 L/s </li></ul></ul><ul><ul><li>6 Amps 8 8 </li></ul></ul><ul><ul><li>7 Overall Efficiency 47% 47 % </li></ul></ul>Typical name plate details of pump
  21. 21. <ul><li>PUMP EFFICIENCY CALCULATION SHEET </li></ul><ul><li>SL.NO. ITEM Pump1 Pump2 Units </li></ul><ul><li>1 Voltage 406 407 volts </li></ul><ul><li>2 Current 6.0 6.6 amps </li></ul><ul><li>3 P.F 0.83 0.82 </li></ul><ul><li>4 Power input 3.5 3.48 KW </li></ul>Typical performance calculations
  22. 22. <ul><li>5 Dis. Head 22.2 22.2 m </li></ul><ul><li>6 Suc.Head 2.2 2.2 m </li></ul><ul><li>7 discharge 8 8 L/s </li></ul><ul><li>8 Hyd.Power 1.57 1.57 KW </li></ul><ul><li>9 Pump Effi. 44.85 45.10 </li></ul>Typical performance calculations
  23. 23. <ul><li>1. Replace the existing discharge line with the 50 mm dia pipes to reduce the friction losses. </li></ul><ul><li>2. Provide water level switch to switch off the pump sets as soon as the Tank is filled. </li></ul><ul><li>3. Replace the existing pump sets with high efficiency pump sets. </li></ul>Typical observations/ Recommendations
  24. 24. <ul><li>Size pump correctly </li></ul><ul><li>Operate close to the best efficiency point. </li></ul><ul><li>Size all piping and valves correctly </li></ul><ul><li>Avoid all leakages. </li></ul>Factors to be considered from user side
  25. 25. Flow control Strategies <ul><li>Varying speed </li></ul><ul><li>Pumps in parallel </li></ul><ul><li>stop/start control </li></ul><ul><li>Flow control valve </li></ul><ul><li>By pass control valve </li></ul><ul><li>Trimming impeller </li></ul><ul><li>Use of VFDS </li></ul>
  26. 26. Energy conservation opportunities in pumping <ul><li>Operate pump near best efficiency point. </li></ul><ul><li>Replace old pumps by energy efficient pumps </li></ul><ul><li>Reduce system resistance by pressure drop assessment and pipe size optimization. </li></ul><ul><li>Provide booster pump for few areas of higher head. </li></ul>
  27. 27. Energy conservation opportunities in pumping <ul><li>Conduct water balance to minimize water consumption. </li></ul><ul><li>Ensure availability of instruments like pressure gauges, flow meters. </li></ul><ul><li>Repair seals and packing to minimize water loss. </li></ul><ul><li>Avoid valves in discharge side as far as possible. </li></ul><ul><li>Operate pumpset during non-peak hours. </li></ul>
  28. 28. Thank You
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