The Lempor ejector is a
steam locomotive exhaust system developed by noted
Argentine
Argentines, Argentinians or Argentineans are people from Argentina. This connection may be residential, legal, historical, or cultural. For most Argentines, several (or all) of these connections exist and are collectively the source of their ...
locomotive engineer
Livio Dante Porta
Livio Dante Porta (21 March 1922 – 10 June 2003) was an Argentine steam locomotive engineer. He is particularly remembered for his innovative modifications to existing locomotive systems in order to obtain better performance and energy effi ...
. The ejector's name is a portmanteau of the names of Porta and Belgian locomotive engineer
Maurice Lemaître. The Lempor ejector follows the principles of the
de Laval nozzle.
Operation
In
steam locomotive
A steam locomotive is a locomotive that provides the force to move itself and other vehicles by means of the expansion of steam. It is fuelled by burning combustible material (usually coal, Fuel oil, oil or, rarely, Wood fuel, wood) to heat ...
s,
draft
Draft, the draft, or draught may refer to:
Watercraft dimensions
* Draft (hull), the distance from waterline to keel of a vessel
* Draft (sail), degree of curvature in a sail
* Air draft, distance from waterline to the highest point on a v ...
is produced in the
firebox by exhausting waste steam from the
cylinders into the chimney via a nozzle or 'blast pipe' to create a vacuum in the smokebox. The Lempor ejector is a development of similar multiple orifice/nozzle ejectors which create either a stronger vacuum or the same vacuum more efficiently by having less 'back pressure' or resistance to the exhausting cylinder.
Results
The Lempor exhaust is claimed to deliver a 100% improvement in draughting capacity over traditional exhaust systems and a 40% increase in ejector performance.
References
External links
Lempor Exhauston The Ultimate Steam Page.
Locomotive parts
Steam locomotive exhaust systems
Steam locomotive technologies
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