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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
Volatile matter
The loss in mass, when dry coal is heated under standard conditions and out of contact with air. This test is empirical and results are very sensitive to operating conditions. Results obtained from different standard methods will not necessarily give the same result. The ASTM method generally gives a higher result than other methods.
