Steam Boilers, Engines, Nozzles and Turbines
The function of a flywheel is

To convert reciprocating motion of the piston into rotary motion
To keep the engine speed uniform at all load conditions
To convert rotary motion of the crankshaft into to and fro motion of the valve rod
To prevent fluctuation of speed

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Steam Boilers, Engines, Nozzles and Turbines
The equivalent evaporation of a boiler is a measure to compare

The two different boilers of the same make
Any type of boilers operating under any conditions
Two different makes of boilers operating under the same operating conditions
The given boiler with the model

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Steam Boilers, Engines, Nozzles and Turbines
In forced circulation type boiler

Water is supplied in drum and through down comers located in atmospheric condition it passes to the water wall and rises to drum in the form of mixture of water and steam
Water is converted into steam in one pass without any recirculation
Heating takes place at bottom and the water supplied at bottom gets converted into the mixture of steam bubbles and hot water which rise to drum
Feed pump is employed to supplement natural circulation in water wall type furnace

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