Steam Boilers, Engines, Nozzles and Turbines
Proximate analysis of fuel is determination of percentage of

Lower calorific value
Fixed carbon, ash, volatile matter, moisture
Higher calorific value
Carbon, hydrogen, nitrogen, sulphur, moisture

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Steam Boilers, Engines, Nozzles and Turbines
In designing air preheaters, the important design consideration is that

Stack gases should not be cooled to the dew point
Handling and maintenance should be easier
Approach temperature should be as low as possible
Heat transfer area should be optimum

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