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User:MichaelFrey/Manson engine

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The Manson engine is a Hot air engine was first described by A. D. Manson in the March 1952 issue of Newnes Practical Mechanics-Magazines.[1]

Manson Engines can be started both ways (clockwise and counter clockwise).[2]

The piston is stepped. The front part is acting as a displacer and the back part as work piston. (Displacer and Piston move as a single component)[3][1]

The Manson Engine has no commercial or practical application. Engines are mainly build as Desk toys/Physics demonstration/novelties.[2]

The engine is double acting,[1] as it is using both the expansion of the warmed air and the contraction of cooling air to exploit work.[3][4][5]

The engine only requires three moving parts (Piston[3], Piston Rod and crank).

Functioning mechanism

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Drawing based on the original design[1]
ideal PV-Diagramm[6][7]
  • Phase 1 (cooling down the work medium, suction stroke)
    • when the Piston is moved towards the heat source, the hot gas inside the engine is moved to the cool side of the cylinder.
    • the gas is cooled there, resulting in a drop in pressure, further moving the piston towards the heat source.
  • Phase 2 (upper death center)
    • When the piston reaches the upper death center, the valve is open, releasing the vacuum.
    • the flywheel keeps the piston moving
  • Phase 3 (heating up the work medium, expansion stroke)
    • when the piston is moving away from the heat source, the air is pushed towards the heat source.
    • the air is then heating up, resulting in the air expanding and the piston being further pushed away from the heat source
  • Phase 4 (lower death center)
    • when the piston reaches the lower death center, the valve is open, releasing the build up pressure and hot air.
    • the flywheel keeps the piston moving

differences to Stirling engines

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Stirling engines are typically closed systems. Manson Engines are open system.[3][5][8][2]

Displacer and Work piston of the Manson Engine have zero phase angle.[4]

Variations

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Manson-Ruppel-Engine[9]

The valve/gas paths are considered by some to be complicated to manufacture, so various variants exists with improved/modified simplified vales/gas paths.[9][10]

Sources

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  1. ^ a b c d "The Manson experimental double acting engine". www.stirlingengines.org.uk.
  2. ^ a b c "Nano Disc - Horizontal - From www.stirlingengine.co.uk". Stirlingengine.co.uk.
  3. ^ a b c d "Manson". techref.massmind.org.
  4. ^ a b "New generation of hot air engines: Manson engine".
  5. ^ a b "Manson". www.geocities.ws.
  6. ^ "Principes de fonctionnement du moteur Manson". web.archive.org. December 22, 2018.
  7. ^ "Manson-Motor". www.w-haag.de.
  8. ^ https://journeymans-workshop.uk/images/downloads/manson.pdf
  9. ^ a b C2 DE 19904269 C2, Michael Ruppel, "Heißluftmotor - Heat engine has a simplified design with combined piston and valve and with alternate sides of the piston vented in either limits of the piston movement", published 2000-11-9, issued 2001-6-5 
  10. ^ GB application 2554458A, Christopher Guise, "Improvement to Manson engine", published 2000-11-09 
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Category:Hot air engines