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ar as received basis | ad air dried basis | d dry basis
Specific Energy Conversions
For conversions between units
1 btu/lb = 0.002326 mj/kg
1 kcal/kg 0.0041868 mj/kg
1 metric ton (tonne) 1.10231 short tons
From GAR to NAR
The difference between net and gross as received (NAR v/s GAR) specific energy values is the latent heat of the water vapour which lowers the effective calorific value in the boiler. To convert from GAR to NAR for bituminous coals subtract approximately
1.09 mj/kg
260 kcal/kg
470 btu/lb
Knowledge = Power…
Coal Basics
A picture is worth a thousand words.
Select a term from the list
=coal that includes TOTAL MOISTURE, ASH, VOLATILE MATTER, and FIXED CARBON
Phosphorus
Should be avoided in coking coal because it accumulates in the hot metal and gives undesirable properties to the resultant steel. Can also create problems during coal combustion by the formation of hard phosphatic deposits Iinside boilers.
