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Expansion Engine
Expansion Engine is
a vertical reciprocating machine which can expand air adiabatically
from operating air pressure to 5 Km / cm2 to produce the required cold
for the Oxygen / Nitrogen plant. It greatly helps to reduce power
consumption.
The Electric Motor
is used initially to start the machine. Thereafter the engine is moved
by the air pressure itself during which time the engine motor retains
the speed by acting as a brake. Since work is done by air in rotating
the Flywheel, it loses its heat content (enthalpy). Thus the air gets
cooled. This cooling is more than that of an expansion in an expansion
valve.
The Expansion Engine can be considered as three major units:
- The drive unit
- The Cylinder unit for air expansion and
- The Hydraulic Systems for operating the Valves
A High Pressure Expansion Engine is used for liquid Plants.
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