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SAMPLE SLIDES OF THE 1-DAY SEMINAR FOR PUMP USERS. As you will notice there are few words on these slides, your trainer will provide you with his experience which will make these images come alive providing you with the opportunity to reflect and ask questions, the more the better. - PowerPoint PPT Presentation
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SAMPLE SLIDES OF THE 1-DAY SEMINAR FOR PUMP USERSAs you will notice there are few words on these slides, your trainer will provide you with his experience which will make these images come alive providing you with the opportunity to reflect and ask questions, the more the better.
All of the presentation slides are available in a binder supplied with the seminar.
Pump systems
A BRIEF HISTORY
Pressure is independent of the shape of the reservoirs
Low pressure helps to suspend the fluid
A pump system acts as a reverse siphon
Demo for low pressure at the high point of a piping system
The energy required of the pump
Specific energy or head
The total head or total specific energy required of the pump
Pump performance curves
Vapor pressure
Experiment to boil water at room temperature
Operating principle of a centrifugal pump
Section of a centrifugal pump
Performance curves
NPSH depends on:The elevation of the surface of the suction tankThe pressure in the suction tankThe friction loss in the suction lineThe vapor pressure of the fluid at the operating temperature
Selecting the right impeller diameter
Measurements on demo system
3. Evaluate these situations in terms of good, medium or poor?Ans: _____Ans : _____Ans : _____
4. Give your opinion on the piping layout at the pump suction in terms of good, medium or poor?Ans : _____Ans : _____
SOLUTION TO THE ELBOW TOO CLOSE TO THE PUMP SUCTION PROBLEM
USING AN EXCENTRIC ELBOW
Pumps in parallel - Instability
Minimum submergence of the pump suction piping
The effect of air (or gas) entrainment in the pump suction
Excessive vibration causing damage to the impeller due to: - cavitationCauses and problems associated with pump systems
NPSH or low pressure at the inletCauses and problems associated with pump systems
Opportunities with higher return
1. Replace a standard motor with a high efficiency motor
Replace a standard efficiency motor with one that meets or surpasses the NEMA Premium standard Typically 1.5 to 5% and as much as 8% When the motors are defective or at the end of their useful life or when a motor must be replaced to accommodate a VFD.
Opportunities in electrical energy reduction Possible decrease in electrical consumption 1 Winning conditions
High efficiency motors
Opportunities with higher return
2. Install a variable frequency drive (VFD)
A VFD can adjust the speed of a motor in response to a variable demand avoiding the throttling of control valves or the opening of recirculation control valves and the energy losses incurred. Typically 12 to 15% and as much as 27% Ideal solution when the flow varies between 40 and 60%
Opportunities in electrical energy reduction Possible decrease in electrical consumption 1 Winning conditions