Steam Boilers, Engines, Nozzles and Turbines
In regenerative air preheaters, the heat is transferred

Heat is transferred by bleeding some gas from furnace
By direct mixing
From a metal wall from one medium to another
From heating an intermediate material and then heating the air from this material

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

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

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