Flow charts
Flow charts to assess the suitability of a VSD for a pump system are shown in Figures 9.1 for rotodynamic pumps and 9.2 for positive displacement
pumps. These are based on using a variable frequency drive, which will be more efficient than any speed control device, which uses slip to vary the speed. Having established that using a VFD is appropriate, Figure 9.3 is a flow chart for selecting the correct drive and making the life cycle cost calculation. Chapter 12 will help in making the financial justification.
Appendix A2.4 contains information on the factors to be considered in sizing a drive.
Related posts:
Particle degradation:Test rigs and data sources
Gas–solid separation devices:Dust control and Particle degradation
Low pressure and vacuum:Screw feeders and The simple screw feeder.
Optimizing and up-rating of existing systems:System not capable of duty
Design procedures:The influence of pipeline bore
ACTUATORS:Trunnion Mount and Clevis Mount
Hydraulic accessories:Steel tubing.
Hydraulic fluids:Fire-resistant fluids
Hydraulic circuit design and analysis:Hydraulic circuits
Cleanliness.
Air compressors, air treatment and pressure regulation.
Air Compressors, Air Treatment and Pressure Regulation:air treatment
ENTROPY:ENTROPY CHANGE OF LIQUIDS AND SOLIDS
HEAT EXCHANGERS:THE LOG MEAN TEMPERATURE DIFFERENCE METHOD
FORCED CONVECTION:THERMAL BOUNDARY LAYER