The ST05G Stirling Engine Project
The ST05G is a basic 500 Watt
experimental Stirling Engine. It
was designed by Dieter Viebach in 1992 to promote microcogeneration
with biomass fuels.
Technical
Data
| Dimensions
|
350x300x600mm |
| Weight |
20kg (cast
aluminum version) |
| Flywheel |
7,5kg; diameter:
280mm |
| Bore |
power piston: 85mm, displacer:
96mm |
| Stroke |
75mm |
| Working Gas |
nitrogen, dry air or helium
@10bar |
| Efficiency |
22% (engine only) |
| Power (mech.) |
500W @ 650°C
heater temperature |
| Idle Speed |
800 1/min |
| Heat Source |
optional, pref. biomass fuels |
| Lowest temp. |
-100°C in
refrigerator mode |
ST05G and ST05G-G
The engine was first demonstrated to the public at the 1993 ISEC
Stirling Engine Conference in Eindhofen. To make it more popular Dieter
Viebach began publishing a set of construction drawings for this
engine. He even started distributing a set of aluminum castings to make
it easier to manufacture the engine. About 120 sets were sold. There
was a lively exchange under the ST05G-enthusiasts and the original
design experienced a number of improvements. Even a version with
integrated generator (ST05G-G) was added.There is an old
website on
that project with additional information (in german language only).
Today the plans for this engine are distributed under the Creative Commons -
Attribution-Noncommercial-Share Alike-licence and are available as free download.
Updated Version:
ST05G-CNC
 During
the last years it turned out that producing the castings for the ST05G
became more and more uneconomical due to the low number of prototypes
that were built. So Dieter Viebach decided not to reissue any further
lot. On the other hand CNC-machining techniques have improved a lot
during the last years. So we decided to update the ST05G-drawings and
bring out the ST05G-CNC.
There
are no more cast aluminum parts needed. The engine now can be built in
any up to date workshop with 3- or 5-axis machining centre. The new
drawings are available here.
As
in its beginnings the project is still open to everyone. During the
first years Dieter Viebach gathered all the ideas on
stiring-micro-cogeneration in his newsletters ("Ringinfos"). He
regularly published them and sent prints to anyone involved in the
project. Today the internet offers far better possibilities for a
collaboration. For that reason we have opened a ST05G-Stiring-Forum.
There you can find the latest information on our stirling engine
project. Feel free and use this forum to dicuss your questions or share
your ideas with us!
 The
Italian company El.Ma. srl was the first to finish and operate
the ST05-G-CNC built according to our plans. You can download
a movie of the running engine here.
There are some more videos and animations in our
YouTube
Channel.
 Despite
the fact that the ST05G-CNC is one of the most basic power stirling
engines it still requires a well equipped workshop to build it. For all
those who might face some problems with major CNC-parts we now have a
choice of parts on stock.
For availability and prices please contact us.
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