The ratio of the energy required to produce the artificial draught (expressed in meters head or J/kg of flue gas) to the mechanical equivalent of extra heat carried away per kg of flue gases due to natural draught, is known as

Steam Boilers, Engines, Nozzles and Turbines
The ratio of the energy required to produce the artificial draught (expressed in meters head or J/kg of flue gas) to the mechanical equivalent of extra heat carried away per kg of flue gases due to natural draught, is known as

Efficiency of the chimney

Power of the boiler

Efficiency of the fan

Efficiency of the boiler

Efficiency of the chimney

Power of the boiler

Efficiency of the fan

Efficiency of the boiler

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Steam Boilers, Engines, Nozzles and Turbines
Equivalent evaporation of water is the evaporation for a feed water supply at 100°C

And its corresponding conversion into dry saturated steam at 100°C and 1.033 kg/cm²

Conversion into steam at the same pressure at which feed water is supplied

And its corresponding conversion into dry steam at desired boiler pressure

Conversion into steam at atmospheric condition

And its corresponding conversion into dry saturated steam at 100°C and 1.033 kg/cm²

Conversion into steam at the same pressure at which feed water is supplied

And its corresponding conversion into dry steam at desired boiler pressure

Conversion into steam at atmospheric condition

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Steam Boilers, Engines, Nozzles and Turbines
The major axis of elliptical manholes on the shell should be provided

On dished end

Anywhere

Circumferentially

Longitudinally

On dished end

Anywhere

Circumferentially

Longitudinally

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Steam Boilers, Engines, Nozzles and Turbines
Pulverized fuel is used for

Less radiation loss

More calorific value

Better burning

Medium sized units

Less radiation loss

More calorific value

Better burning

Medium sized units

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Steam Boilers, Engines, Nozzles and Turbines
The shell of the Cochran boiler is made hemispherical

None of these

To give maximum space and strength

Both (A) and (B)

To withstand the pressure of steam inside the boiler

None of these

To give maximum space and strength

Both (A) and (B)

To withstand the pressure of steam inside the boiler

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Steam Boilers, Engines, Nozzles and Turbines
Calorific value of coal is of the order of

800-1200 kcal/ kg

2000-4000 kcal/ kg

200-400 kcal/ kg

5000-8000 kcal/ kg

800-1200 kcal/ kg

2000-4000 kcal/ kg

200-400 kcal/ kg

5000-8000 kcal/ kg

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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines The ratio of the energy required to produce the artificial draught (expressed in meters head or J/kg of flue gas) to the mechanical equivalent of extra heat carried away per kg of flue gases due to natural draught, is known as

Steam Boilers, Engines, Nozzles and Turbines Equivalent evaporation of water is the evaporation for a feed water supply at 100°C

Steam Boilers, Engines, Nozzles and Turbines The major axis of elliptical manholes on the shell should be provided

Steam Boilers, Engines, Nozzles and Turbines Pulverized fuel is used for

Steam Boilers, Engines, Nozzles and Turbines The shell of the Cochran boiler is made hemispherical

Steam Boilers, Engines, Nozzles and Turbines Calorific value of coal is of the order of

Steam Boilers, Engines, Nozzles and Turbines
The ratio of the energy required to produce the artificial draught (expressed in meters head or J/kg of flue gas) to the mechanical equivalent of extra heat carried away per kg of flue gases due to natural draught, is known as

Steam Boilers, Engines, Nozzles and Turbines
Equivalent evaporation of water is the evaporation for a feed water supply at 100°C

Steam Boilers, Engines, Nozzles and Turbines
The major axis of elliptical manholes on the shell should be provided

Steam Boilers, Engines, Nozzles and Turbines
Pulverized fuel is used for

Steam Boilers, Engines, Nozzles and Turbines
The shell of the Cochran boiler is made hemispherical

Steam Boilers, Engines, Nozzles and Turbines
Calorific value of coal is of the order of