Handbook of Civil Engineering Calculations

Part 2 Pump Operating Modes, Affinity Laws, Speed and Head
Series Pump Installation Analysis
Parallel Pumping Economics
Similarity or Affinity Laws for Centrifugal Pumps
Similarity or Affinity Laws in Centrifugal Pump Selection
Specific Speed Considerations in Centrifugal Pump Selection
Selecting the Best Operating Speed for a Centrifugal Pump
Total Head on a Pump Handling Vapor-Free Liquid
Pump Selection for any Pumping System
Analysis of Pump and System Characteristic Curves
Net Positive Suction Head for Hot-Liquid Pumps

Part 3 Centrifugal Pumps and Hydro Power

Minimum Safe Flow for a Centrifugal Pump
Selecting a Centrifugal Pump to Handle a Viscous Liquid
Pump Shaft Deflection and Critical Speed
Effect of Liquid Viscosity on Regenerative-Pump Performance
Effect of Liquid Viscosity on Red p roc a ting-Pump Performance
Effect of Viscosity and Dissolved Gas on Rotary Pumps
Selection of Materials for Pump Parts
Sizing a Hydropneumatic Storage Tank
Using Centrifugal Pumps as Hydraulic Turbines
Sizing Centrifugal-Pump Impellers for Safety Service
Pump Choice to Reduce Energy Consumption and Loss
Small Hydro Power Considerations and Analysis
"Clean" Energy from Small-Scale Hydro Sites
Use of Solar-Powered Pumps in Irrigation and Other Services

6.29

6.32

6.36

6.37

6.38

6.40

6.42

6.47

6.55

6.61

6.63

6.64

6.66

6.67

6.69

6.70

6.72

6.72

6.73

6.78

6.81

6.84

6.87

6.90

PARTl

FLUID MECHANICS

Hydrostatics

The notational system used in hydrostatics is as follows: W= weight of floating body, Ib

(N); V= volume of displaced liquid, ft^3 (m^3 ); w = specific weight of liquid, lb/ft^3 (N/m^3 );

for water w = 62.4 lb/ft^3 (9802 N/m^3 ), unless another value is specified.

BUOYANCYAND FLOTATION

A timber member 12 ft (3.65 m) long with a cross-sectional area of 90 in

2

(580.7 cm

2

)

will be used as a buoy in saltwater. What volume of concrete must be fastened to one end