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
Efficiency of Rankine cycle can be increased by

Increasing exhaust pressure

Increasing the expansion ratio

Decreasing initial steam pressure and temperature

Decreasing exhausts pressure

Increasing exhaust pressure

Increasing the expansion ratio

Decreasing initial steam pressure and temperature

Decreasing exhausts pressure

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Steam Boilers, Engines, Nozzles and Turbines
The velocity of flue gases (V) through the chimney under a static draught of (H') metres is given by

V = 2g/H'

V = 2gH'

V = H'/2g

V = 2g H'

V = 2g/H'

V = 2gH'

V = H'/2g

V = 2g H'

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Steam Boilers, Engines, Nozzles and Turbines
In regenerative air preheaters, the heat is transferred

Heat is transferred by bleeding some gas from furnace

From a metal wall from one medium to another

From heating an intermediate material and then heating the air from this material

By direct mixing

Heat is transferred by bleeding some gas from furnace

From a metal wall from one medium to another

From heating an intermediate material and then heating the air from this material

By direct mixing

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Steam Boilers, Engines, Nozzles and Turbines
For burning 1 kg of carbon to CO as per chemically correct combustion, amount of air required is

8/3 kg

2 kg

1 kg

4/3 kg

8/3 kg

2 kg

1 kg

4/3 kg

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Steam Boilers, Engines, Nozzles and Turbines
A device used to increase the temperature of saturated steam without raising its pressure, is called

Blow off cock

Stop valve

Superheater

Fusible plug

Blow off cock

Stop valve

Superheater

Fusible plug

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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 Efficiency of Rankine cycle can be increased by

Steam Boilers, Engines, Nozzles and Turbines The velocity of flue gases (V) through the chimney under a static draught of (H') metres is given by

Steam Boilers, Engines, Nozzles and Turbines In regenerative air preheaters, the heat is transferred

Steam Boilers, Engines, Nozzles and Turbines For burning 1 kg of carbon to CO as per chemically correct combustion, amount of air required is

Steam Boilers, Engines, Nozzles and Turbines A device used to increase the temperature of saturated steam without raising its pressure, is called

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
Efficiency of Rankine cycle can be increased by

Steam Boilers, Engines, Nozzles and Turbines
The velocity of flue gases (V) through the chimney under a static draught of (H') metres is given by

Steam Boilers, Engines, Nozzles and Turbines
In regenerative air preheaters, the heat is transferred

Steam Boilers, Engines, Nozzles and Turbines
For burning 1 kg of carbon to CO as per chemically correct combustion, amount of air required is

Steam Boilers, Engines, Nozzles and Turbines
A device used to increase the temperature of saturated steam without raising its pressure, is called