In a boiler, feed water supplied per hour is 205 kg while coal fired per hour is 23 kg. The net enthalpy rise per kg of water is 145 kJ. If the calorific valve of the coal is 2050 kJ/kg, then the boiler efficiency will be

Steam Boilers, Engines, Nozzles and Turbines
In a boiler, feed water supplied per hour is 205 kg while coal fired per hour is 23 kg. The net enthalpy rise per kg of water is 145 kJ. If the calorific valve of the coal is 2050 kJ/kg, then the boiler efficiency will be

0.74

0.78

0.63

0.56

0.74

0.78

0.63

0.56

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Steam Boilers, Engines, Nozzles and Turbines
The fire tubes in, a Coarran and Scottish marine boiler are

Horizontal

Both horizontal and vertical

Vertical

Inclined

Horizontal

Both horizontal and vertical

Vertical

Inclined

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Steam Boilers, Engines, Nozzles and Turbines
Evaporative capacity of boiler is expressed as

kg of steam produced

kg of fuel fired

Steam pressure produced

kg of steam produced per kg of fuel fifed

kg of steam produced

kg of fuel fired

Steam pressure produced

kg of steam produced per kg of fuel fifed

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Steam Boilers, Engines, Nozzles and Turbines
When the circulation of water, in a boiler, is by convection currents which are set up during the heating of water, then the boiler is known as

Internally fired boiler

Natural circulation boiler

Externally fired boiler

Forced circulation boiler

Internally fired boiler

Natural circulation boiler

Externally fired boiler

Forced circulation boiler

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Steam Boilers, Engines, Nozzles and Turbines
In order to obtain superheated steam, a superheater is added in an existing boiler. As as result, furnace vacuum will

Improve

Remain unaffected

May improve/worsen depending on size

Worsen

Improve

Remain unaffected

May improve/worsen depending on size

Worsen

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Steam Boilers, Engines, Nozzles and Turbines
The feed check valve is used in order to

Recirculate unwanted feed water

Regulate flow of boiler water

Allow high pressure feed water to flow to drum and not allow reverse flow to take place

Check level of water in boiler drum

Recirculate unwanted feed water

Regulate flow of boiler water

Allow high pressure feed water to flow to drum and not allow reverse flow to take place

Check level of water in boiler drum

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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines In a boiler, feed water supplied per hour is 205 kg while coal fired per hour is 23 kg. The net enthalpy rise per kg of water is 145 kJ. If the calorific valve of the coal is 2050 kJ/kg, then the boiler efficiency will be

Steam Boilers, Engines, Nozzles and Turbines The fire tubes in, a Coarran and Scottish marine boiler are

Steam Boilers, Engines, Nozzles and Turbines Evaporative capacity of boiler is expressed as

Steam Boilers, Engines, Nozzles and Turbines When the circulation of water, in a boiler, is by convection currents which are set up during the heating of water, then the boiler is known as

Steam Boilers, Engines, Nozzles and Turbines In order to obtain superheated steam, a superheater is added in an existing boiler. As as result, furnace vacuum will

Steam Boilers, Engines, Nozzles and Turbines The feed check valve is used in order to

Steam Boilers, Engines, Nozzles and Turbines
In a boiler, feed water supplied per hour is 205 kg while coal fired per hour is 23 kg. The net enthalpy rise per kg of water is 145 kJ. If the calorific valve of the coal is 2050 kJ/kg, then the boiler efficiency will be

Steam Boilers, Engines, Nozzles and Turbines
The fire tubes in, a Coarran and Scottish marine boiler are

Steam Boilers, Engines, Nozzles and Turbines
Evaporative capacity of boiler is expressed as

Steam Boilers, Engines, Nozzles and Turbines
When the circulation of water, in a boiler, is by convection currents which are set up during the heating of water, then the boiler is known as

Steam Boilers, Engines, Nozzles and Turbines
In order to obtain superheated steam, a superheater is added in an existing boiler. As as result, furnace vacuum will

Steam Boilers, Engines, Nozzles and Turbines
The feed check valve is used in order to