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

To convert heat energy of the steam into mechanical work
To exhaust steam from the cylinder at proper moment
To guide motion of the piston rod and to prevent it from bending
To transfer motion from the piston to the cross head

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Steam Boilers, Engines, Nozzles and Turbines
A regenerative steam cycle renders

Increased thermal efficiency
Increased work output per unit mass of steam
Decreased work output per unit mass of steam
Decreased work output per unit mass of steam as well as increased thermal efficiency

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