Gas Compressors Pdf

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Compressors?

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• Compressors used to increase the pressure of a gas (compressible fluid)

Examples

• Compressors increase the pressure for instrument air systems (to get control valves to operate), 

• Transport gases such as hydrogen, nitrogen, fuel gas, etc. in a chemical plant

Types of Compressors

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Positive Displacement (PD) : Operate by trapping a specific volume of gas and forcing it into a smaller volume

• Two Basic Designs for PD Compressors

1. Rotary
2. Reciprocating

• Centrifugal : Operate by accelerating the gas and converting the energy to pressure

• Two Basic Designs for Centrifugal Compressors

1. Centrifugal
2. Axial

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