The draught (in mm of water), for maximum discharge of flue gases through the chimney, is given by (where H = Height of the chimney in meters, and T1 = Absolute temperature of air outside the chimney in K)

Steam Boilers, Engines, Nozzles and Turbines
The draught (in mm of water), for maximum discharge of flue gases through the chimney, is given by (where H = Height of the chimney in meters, and T1 = Absolute temperature of air outside the chimney in K)

T1 /88.25H

176.5H/T1

88.25H/T1

T1 /176.5H

T1 /88.25H

176.5H/T1

88.25H/T1

T1 /176.5H

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Steam Boilers, Engines, Nozzles and Turbines
Stage efficiency is also known as

None of these

Diagram efficiency

Gross efficiency

Nozzle efficiency

None of these

Diagram efficiency

Gross efficiency

Nozzle efficiency

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

0.5

0.4

0.9

0.75

0.5

0.4

0.9

0.75

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Steam Boilers, Engines, Nozzles and Turbines
The pressure of feed water has to be raised before its entry into the boiler. The pressure is raised by a device known as

Pressure gauge

Feed pump

Injector

Feed check valve

Pressure gauge

Feed pump

Injector

Feed check valve

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Steam Boilers, Engines, Nozzles and Turbines
If a steam sample is nearly in dry condition, then its dryness fraction can be most accurately determined by

Throttling calorimeter

Separating calorimeter

Bucket calorimeter

Combined separating and throttling calorimeter

Throttling calorimeter

Separating calorimeter

Bucket calorimeter

Combined separating and throttling calorimeter

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Steam Boilers, Engines, Nozzles and Turbines
Primary air is the air used to

Air delivered by forced draft fan

Convert CO (formed in lower zone of furnace) into CO₂ at higher zone

Transport and dry the coal

Provide air around burners for obtaining optimum combustion

Air delivered by forced draft fan

Convert CO (formed in lower zone of furnace) into CO₂ at higher zone

Transport and dry the coal

Provide air around burners for obtaining optimum combustion

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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines The draught (in mm of water), for maximum discharge of flue gases through the chimney, is given by (where H = Height of the chimney in meters, and T1 = Absolute temperature of air outside the chimney in K)

Steam Boilers, Engines, Nozzles and Turbines Stage efficiency is also known as

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

Steam Boilers, Engines, Nozzles and Turbines The pressure of feed water has to be raised before its entry into the boiler. The pressure is raised by a device known as

Steam Boilers, Engines, Nozzles and Turbines If a steam sample is nearly in dry condition, then its dryness fraction can be most accurately determined by

Steam Boilers, Engines, Nozzles and Turbines Primary air is the air used to

Steam Boilers, Engines, Nozzles and Turbines
The draught (in mm of water), for maximum discharge of flue gases through the chimney, is given by (where H = Height of the chimney in meters, and T1 = Absolute temperature of air outside the chimney in K)

Steam Boilers, Engines, Nozzles and Turbines
Stage efficiency is also known as

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

Steam Boilers, Engines, Nozzles and Turbines
The pressure of feed water has to be raised before its entry into the boiler. The pressure is raised by a device known as

Steam Boilers, Engines, Nozzles and Turbines
If a steam sample is nearly in dry condition, then its dryness fraction can be most accurately determined by

Steam Boilers, Engines, Nozzles and Turbines
Primary air is the air used to