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:
Financial justification:Life cycle cost (LCC)
Benefits, drawbacks and operational issues:Tangible benefits to the user
Concepts for estimating pumping energy costs:Systems without static head or closed loop systems
Applications on pneumatic:Mining and quarrying equipment.
Compressed Air Transmission and Treatment:Carbon dioxide
Air flow rate evaluation:Volumetric flow rate
First approximation design methods:Methods presented
Pipelines and valves:Isolating valves and Butterfly valves
High pressure:Single blow tank systems
Health and safety:Dust risks, Dust emission and Dust as a health hazard.
Maintenance and troubleshooting:Commissioning procedures
Control components in a hydraulic system:Sequencing valve.
CONTROL VALVES:COUNTERBALANCED VALVES
Loading valves.
Air Compressors, Air Treatment and Pressure Regulation:compressor types and Piston compressors