SAMPLE SLIDES OF THE 1 DAY SEMINAR FOR

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. 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 tank The pressure in the suction tank The friction loss in the suction line The 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 : _____

4. Give your opinion on the piping layout at the pump suction in terms of good, medium or poor? 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

Causes and problems associated with pump systems • Excessive vibration causing damage to the impeller due to: - cavitation

Causes and problems associated with pump systems • NPSH or low pressure at the inlet

Opportunities with higher return Opportunities in electrical energy reduction Possible decrease in electrical 1. Replace a standard motor with a high efficiency motor Typically 1. 5 to 5% and as much as 8% Replace a standard efficiency motor with one that meets or surpasses the NEMA Premium standard Winning conditions consumption 1 When the motors are defective or at the end of their useful life or when a motor must be replaced to accommodate a VFD.

High efficiency motors

Opportunities with higher return Opportunities in electrical energy reduction Possible decrease in electrical 2. Install a variable frequency drive (VFD) Typically 12 to 15% and as much as 27% 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. Winning conditions consumption 1 Ideal solution when the flow varies between 40 and 60%