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

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

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Compressors, Gas Turbines and Jet Engines
The overall isothermal efficiency of compressor is defined as the ratio of

Isothermal h.p. to adiabatic h.p.
Power to drive compressor to isothermal h.p.
Isothermal h.p. to the BHP of motor
Work to compress air isothermally to work for actual compression

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