Index Circular Stirling Stirling program source code Links
circular Gamma dual circular Alpha Siemens Alpha Beta

Gamma type Stirling engine animation with crankshaft.
displacer
compression space displacer drive rod compression space
power piston
connecting rod
crank 1 crank 1 crank 1 crank crank 1 crank 1
crank 1 crank 1 crank 1 crank 1
hot gas in heater tube or expansion space.
heater
regenerator
hot cap
displacer
connecting duct
cold gas in cooler tube or compression space
cooling water
cylinder wall
power piston
displacer drive rod
displacer connecting rod
power piston connecting rod
gudgeon pin (UK, wrist pin US)
power piston crank
displacer crank
crankshaft
Degree of cycle (of cylinder 1).
degree of cycle
0 30 60 90 120 150 180 210 240 270 300 330 360
Animation speed (cycles/minute.) Stops after 3 minutes.
animation speed
0 5 10 15 20 25 30 35 40 45 50 55 60


Info to calculate movements. -----------
 1. crank angle between the cranks on the crank shaft.
 2. Angle between the two cylinders. Often 0 or 90 degrees.
 3. cm, crank radius of the displacer crank.
 4. cm, length of the displacer connecting rod.
 5. cm, crank radius of the power piston cranks.
 6. cm, length of the power piston connecting rod.

Info to calculate active volumes and volume changes. -----------
 7. cm, diameter displacer cylinder.
 8. cm, diameter of the displacer drive rod.
 9. cm, diameter power piston cylinder.

Info to calculate dead volumes. -----------
10. cm, displacer end clearance at the hot side.
11. cm, displacer end clearance at the cold side.
12. cm, power piston end clearance.
13. cm, gap in hot cap.
14. cm, length of hot cap.

Info to calculate engine outputs. -----------
15. number of similar engine units per engine.


CALCULATED OUTPUTS.

%
100-
90-
80-
70-
60-
50-
40-
30-
20-
10-
0-
Volume, red= hot, green= total, blue= cold
( % of maximum total volume)
c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c c
0 30 60 90 120 150 180 210 240 270 300 330 360
Angle degree

HOT CYLINDER VOLUMES
= hot cylinder end clearance dead volume, cm^3.
= hot active volume, cm^3.
+ -------------
= total maximum hot cylinder volume, cm^3.

COLD CYLINDER VOLUMES
= cold cylinder dead volume, cm^3.
= cold cylinder active volume, cm^3.
+ -----------
= total maximum cold cylinder volume, cm^3.

POWER CYLINDER VOLUMES
= power cylinder dead volume, cm^3.
= power cylinder active volume, cm^3.
+ -----------
= total maximum power cylinder volume, cm^3.

REGENERATOR VOLUMES
= gap in hot cap dead volume, cm^3.

MAXIMUM VOLUMES
= total maximum total cylinder volume, cm^3.
= total maximum cold volume, cm^3.

AREAS
= displacer, hot piston area, cm^2.
= cold piston area, cm^2.
= power piston area, cm^2.