S.No Factors Briquettes Wood/Loose  Biomass/Rice Husk Coal
1. Calorific Value 3800-4500 2500 to 3000 5000-5500
2. Ash Contents 2  to 10 20 to 25% 20 to 40%
3. Pollution/Poisonous effluent Smoke No Smoke No Sulfur Smoke Sulphur,Co2,
phosphorous fumes
4. Moisture 8 %( max) 25 to 35% 10 to 20%
5. Cost Rs.4.5 /Kg Rs. 3.5 /kg Rs. 8.0 /kg
6. Cost Rs./Kcal 1.18 1.4 1.6
7. Efficiency of boiler 75% 70% 75%
8. Wastages/Loss 8-10% 20-25% 15-20%
8 a. Actual usable value Rs./Kcal after losses 1.29 1.75 1.92
8 b. Remarks Best value achieved per Rupee spent Medium value achieved per rupee spent Least value achieved per rupee spent
9. Labour usage Single person is enough Require maximum persons in handling and cutting Require two persons
10. Boiler efficiency Normal Fly ash deposit on tubes Require regular maintenance High wear & tear
11. Handling Easy because of packed material Tough require more areas Tough material
Fossil Fuels
Heavy Furnace Oil 9900 Coal Grade ‘B’ 5000
Kerosene 8900 Coal Grade ‘C’ 4000
Diesel 9400 Fire Wood 3300
LPG 9400 Char Coal 6000
Calorific Value Of Briquette “White Coal” 4000
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