Compressors, Gas Turbines and Jet Engines
Producer gas is produced by

Carbonisation of coal
Passing air and a large amount of steam over waste coal at about 65°C
Passing steam over incandescent coke
Partial combustion of coal, coke, anthracite coal or charcoal in a mixed air steam blast

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Compressors, Gas Turbines and Jet Engines
Volumetric efficiency of a compressor without clearance volume

Is not dependent upon compression ratio
Decreases with increase in compression ratio
May increase/decrease depending on compressor capacity
Increases with increase in compression ratio

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