Chitti

Member • Dec 13, 2011

## Efficiency Of Boiler!

If-----

Duration of trial of boiler is 16 hrs.

Total heating surface is 3000 m[sup]2[/sup].

Total grate area is 4 m[sup]2[/sup].

Mean absolute pressure is 12.5 bar.

Total coal burned is 6850 kg.

Total mass of water evaporated is 65000 kg.

Temperature of feed water is 40[sup]o[/sup] C.

Conditions of steam is 0.93 dry.

then determine ---

Mas of coal burned per m square of grate area per hour.

Mass of water evaporated per kg of coal under actual condition.

Equivalent evaporation per kg of coal.

Equivalent evaporation per m square of total heating surface per hour.

Efficiency of boiler.

(the calorific value of coal is 27720 KJ/kg.)

Duration of trial of boiler is 16 hrs.

Total heating surface is 3000 m[sup]2[/sup].

Total grate area is 4 m[sup]2[/sup].

Mean absolute pressure is 12.5 bar.

Total coal burned is 6850 kg.

Total mass of water evaporated is 65000 kg.

Temperature of feed water is 40[sup]o[/sup] C.

Conditions of steam is 0.93 dry.

then determine ---

Mas of coal burned per m square of grate area per hour.

Mass of water evaporated per kg of coal under actual condition.

Equivalent evaporation per kg of coal.

Equivalent evaporation per m square of total heating surface per hour.

Efficiency of boiler.

(the calorific value of coal is 27720 KJ/kg.)