SAMPLE SLIDES OF THE 2-DAY SEMINAR FOR ENGINEERS

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SAMPLE SLIDES OF THE 2-DAY SEMINAR FOR ENGINEERS
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.
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PUMP SYSTEM ANALYSIS
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A BRIEF HISTORY OF PUMPS
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A BRIEF HISTORY France 1600S
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HYDROSTATIC PRESSURE VS. FLUID COLUMN HEIGHT
The weight of a fluid column is
Pressure (p) is equal to the weight of the fluid
(F) divided by the surface area (A) at the bottom
of the fluid column
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PRESSURE VS. THE SHAPE OF CONTAINERS
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OPEN SYSTEMS AND ENTHALPY
Conservation of energy demands that
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PUMP TOTAL HEAD
The energy balance is
The specific energy or head balance is
Subsituting other expressions for head terms
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THE CONTROL VOLUME APPLIED TO A REAL SYSTEM
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PRESSURE HEAD ANYWHERE ON THE SUCTION SIDE OF THE
PUMP
0
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NET POSITIVE SUCTION HEAD AVAILABLE (N.P.S.H.)
DEFINITION NPSH is the head at the pump suction
minus the vapor pressure head
What is vapor pressure ?
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N.P.S.H. REQUIRED
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HOW IS THE N.P.S.H. REQUIRED LEVEL DETERMINED? 
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SPECIFIC SPEED 
Example
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NPSH REQUIRED CURVES
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OPTIMAL SELECTION OF THE IMPELLER DIAMETER AND
PUMP
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SYSTEM CURVE
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Why increase the impeller diameter when the flow
must be increased?
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MEASURING TOTAL HEAD
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SOURCES OF INFORMATION ON MOTOR EFFICIENCIES
DATA BASE - MotoMaster Department of Energy USA
(DOE)
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Opportunities with higher return
Opportunities in electrical energy reduction Possible decrease in electrical consumption 1 Winning conditions
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.
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High efficiency motors
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Opportunities with higher return
Opportunities in electrical energy reduction Possible decrease in electrical consumption 1 Winning conditions
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
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PUMP SYSTEMS
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Pumps in parallel - Instability
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Minimum submergence of the pump inlet
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The effect of air (or gas) entrainment in the
pump suction
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VARIOUS ITEMS Quick guide Viscosity ASME max.
pressure allowable
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DYNAMIC VISCOSITY
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THE EFFECT OF VISCOSITY ON PUMP PERFORMANCE