Steam Boilers, Engines, Nozzles and Turbines
The indicated thermal efficiency is defined as the

Ratio of brake power to the indicated power
Ratio of thermal efficiency to the Rankine efficiency
Product of thermal efficiency and Rankine efficiency
Ratio of heat equivalent to indicated power to the energy supplied in steam

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Steam Boilers, Engines, Nozzles and Turbines
Coke is produced by

Pulverizing coal in inert atmosphere
Heating wood in a limited supply of air at temperatures below 300°C
Enriching carbon in the coal
Strongly heating coal continuously for about 48 hours in the absence of air in a closed vessel

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