Centrifugal Compressors Process Considerations

Th chapter presents an overview of the types of compresL . ,. eratic i for selecting a type of compressor, a procedure for estimating hors iwer and number of stages, and some process considerations for both ciprocating and centrifugal compressors. Chapter 11 discusses... 

Turboexpanders with Dry Gas Seals. As mentioned above, the application of dry gas seals in centrifugal compressors dates back to the early 1980s. They are useful in process compressors because seal gas leakage is considerably reduced. Also, the contact of process gas and other constituents that may dilute lubricating oil is minimized. 

Some process equipment such as reciprocating pumps, compressors, and conveyors must be started while fully loaded other drives such as centrifugal pumps, fans, and agitators have light loads at starting. Many applications require considerably more torque to start and accelerate the load than to run it the reverse is also true. Starting torque, maximum or breakdown torque, inertia of the load, and the accelerating time must be considered. 

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