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Expansion Engine
This is a vertical single acting reciprocating type Engine. This produces the cold required for operating the plant. The high-pressure air enters through inlet valve at the start of downward stroke of the piston and expands. During upward stroke outlet valve opens and the expanded air pushed out side. The Electric Motor is used to start the engine initially, thereafter the engine is moved by the air pressure itself and the air gets cooled. This cooling is more than the expansion valves. The temperature drops in this engine in 50oC to 70oC depending on air pressure, temperature and inlet cam position.
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