Steam Boilers, Engines, Nozzles and Turbines
The proximate analysis of fuel lists

Fuel constituents as percents by weight of moisture, volatile, fixed carbon and ash
Fuel constituents as percents by volume of moisture, volatile, fixed carbon and ash
Various chemical constituents, carbon, hydrogen, oxygen, etc, plus ash as percents by weight
Various chemical constituents, carbon, hydrogen, oxygen etc, plus ash as percents by volume

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

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

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Steam Boilers, Engines, Nozzles and Turbines
Carbonization of coal is the process of

Pulverizing coal in inert atmosphere
Binding the pulverized coal into briquettes
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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