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VARIABLE SPEED PUMPING - Energy

VARIABLE SPEED PUMPING . A GUIDE TO. SUCCESSFUL APPLICATIONS. EXECUTIVE SUMMARY. VARIABLE SPEED DRIVES. A WAY TO LOWER LIFE CYCLE COSTS. Department of Energy Energy Efficiency and Renewable Energy uropump Industrial Technologies Program Bringing you a prosperous future where Energy is clean, abundant, reliable, and affordable Table of Contents Introduction .. 1. PUMPING Systems .. 1. Selection Process New Systems .. 8. Selection Process Retrofitting to Existing Equipment .. 10. Benefits of VSDs .. 10. Potential Drawbacks of VSDs .. 10. Estimating PUMPING Energy Costs .. 12. Capital Cost Savings .. 13. Financial Justification .. 13. Example: VARIABLE SPEED Drives Fitted on a Primary Feed Pump and Product Transfer Pump in a Refinery.

Pressure is needed to make the liquid flow at the required rate and this must overcome losses in the sys-tem. Losses are of two types: static and friction head. Static head, in its most simple form, is the difference in height of the supply and destination of the liquid being moved, or the pressure in a vessel into which the

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