New Simplified Heat Engine
This site describes a new engine design having these key benefits:
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It demonstrates the principle of heat engines
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It is incredibly simple (even for heat engines)
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You can build it from scratch
The
new design is substantially simpler than a conventional Stirling
engine. Until now, ultra simple heat engine designs were generally
devices that rocked or vibrated but did not rotate. This new design is
extremely simple and rotates. (This site assumes familiarity with
conventional Stirling engines. To learn about Stirling engines search
for them at google.)
The new design unifies the displacer
and flywheel. Unification is achieved by placing the flywheel inside
the displacer chamber, placing the hot and cold plates adjacent to each
other instead of parallel to each other, and using a D-shaped displacer
attached to the flywheel. Although a low temperature differential (LTD)
model is described, the concept extends to HTD configurations.
With
the chamber held horizontally (like a pie) the hot and cold sides are
to the front and rear respectively instead of top and bottom. A
rotating flywheel/displacer rotates the air in the chamber between the
hot and cold regions. An external piston is the only other significant
moving part and is oriented parallel to the chamber instead of
perpendicular.
This configuration has several advantages over the conventional configuration, including:
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Less points of friction - 5 bearing joints instead of 8 or more
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Fewer parts - simplifies time and cost of construction and improves reliability
-
More compact - allows use in tighter spaces
The five bearing points in comparison to eight in a conventional Senft LTD are:
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Top crankshaft bearing
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Bottom crankshaft bearing
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Connecting rod bearing
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Yoke bearing
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Piston
The compactness comes from eliminating the 90 degree relationship of the flywheel to the displacer chamber.
Although
this design has less points of friction than a conventional Stirling
engine, it is slightly less efficient as it lacks dwell time and a
regenerator, and chamber air turbulence is lower. It is not the first
pseudo-rotary heat engine but it is the simplest. This site shows the
simple parts needed to build the engine. The model shown has a 6 inch
chamber diameter.
Note 1: We do NOT offer a kit of any type - however you can use emachineshop.com to design and make many of the parts.
Note 2: I did this project many years ago and am not active in this area - working on other projects now.
