A steam turbine, in which a part of the steam after partial expansion, is used for process heating and the remaining steam is further expanded for power generation, is known as

Steam Boilers, Engines, Nozzles and Turbines
A steam turbine, in which a part of the steam after partial expansion, is used for process heating and the remaining steam is further expanded for power generation, is known as

Impulse turbine

Pass out turbine

Back pressure turbine

Low pressure turbine

Impulse turbine

Pass out turbine

Back pressure turbine

Low pressure turbine

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Steam Boilers, Engines, Nozzles and Turbines
The evaporation of 15.653 kg of water per hour from and at 100°C is called

Equivalent evaporation

One boiler h.p.

Factor of evaporation

Evaporative capacity

Equivalent evaporation

One boiler h.p.

Factor of evaporation

Evaporative capacity

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Steam Boilers, Engines, Nozzles and Turbines
Thermal efficiency of well maintained boiler will be of the order

0.75

0.4

0.9

0.5

0.75

0.4

0.9

0.5

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Steam Boilers, Engines, Nozzles and Turbines
Spontaneous combustion is a phenomenon in which

Coal bursts into flame without any external ignition source but by itself due to gradual increase in temperature as a result of heat released by combination of oxygen with coal

Explosion in furnace

All the fuel burns instantaneously producing high energy release

Fuel burns with less air

Coal bursts into flame without any external ignition source but by itself due to gradual increase in temperature as a result of heat released by combination of oxygen with coal

Explosion in furnace

All the fuel burns instantaneously producing high energy release

Fuel burns with less air

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Steam Boilers, Engines, Nozzles and Turbines
Willian’s line follows the law (where b = A constant representing the shape of the Willian’s line, a = Another constant i.e. no load consumption per hour, I.P. = Indicated power, and m = Steam consumption per hour)

m = a + b × I.P.

m = (b/I.P.) - a

I.P. = b × m + a

I.P. = a × m + b

m = a + b × I.P.

m = (b/I.P.) - a

I.P. = b × m + a

I.P. = a × m + b

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Steam Boilers, Engines, Nozzles and Turbines
Steam turbines may be classified according to

Mode of steam action

Number of stages

Direction of steam flow

All of these

Mode of steam action

Number of stages

Direction of steam flow

All of these

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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines A steam turbine, in which a part of the steam after partial expansion, is used for process heating and the remaining steam is further expanded for power generation, is known as

Steam Boilers, Engines, Nozzles and Turbines The evaporation of 15.653 kg of water per hour from and at 100°C is called

Steam Boilers, Engines, Nozzles and Turbines Thermal efficiency of well maintained boiler will be of the order

Steam Boilers, Engines, Nozzles and Turbines Spontaneous combustion is a phenomenon in which

Steam Boilers, Engines, Nozzles and Turbines Willian’s line follows the law (where b = A constant representing the shape of the Willian’s line, a = Another constant i.e. no load consumption per hour, I.P. = Indicated power, and m = Steam consumption per hour)

Steam Boilers, Engines, Nozzles and Turbines Steam turbines may be classified according to

Steam Boilers, Engines, Nozzles and Turbines
A steam turbine, in which a part of the steam after partial expansion, is used for process heating and the remaining steam is further expanded for power generation, is known as

Steam Boilers, Engines, Nozzles and Turbines
The evaporation of 15.653 kg of water per hour from and at 100°C is called

Steam Boilers, Engines, Nozzles and Turbines
Thermal efficiency of well maintained boiler will be of the order

Steam Boilers, Engines, Nozzles and Turbines
Spontaneous combustion is a phenomenon in which

Steam Boilers, Engines, Nozzles and Turbines
Willian’s line follows the law (where b = A constant representing the shape of the Willian’s line, a = Another constant i.e. no load consumption per hour, I.P. = Indicated power, and m = Steam consumption per hour)

Steam Boilers, Engines, Nozzles and Turbines
Steam turbines may be classified according to