Help in calculations needed
Posted: Thu Aug 31, 2006 11:40 am
I looked everywhere I could before bothering anyone with a post, as I
myself have trouble with forming replies to questions asked.
However, I am unable to find details concerning how to calculate
Stirling engine RPS and watts. I have looked over Schmidt's theory
many times, and purused several dozen websites and .pdfs, including
those for educational, commercial, and recreational purposes.
Having exhausted said options, I turn here with my question: How may
the Revolutions Per Second and Watts of a Stirling engine be
determined? I do not have the means to construct one, nor the method
for physically testing and measuring the output it if I did. My
engine exists only as numbers on paper.
ANY help will be GREATLY appreciated.
Though a method would be prefered to an answer, I provide the
statistics:
The gas in the expansion space can be prevented from dropping under
330ºK.
The surface area of the compression space remains at 273ºK.
Swept volume of expansion piston: 4.31754 m^3
Swept volume of compression piston: 4.31754 m^3
Dead volume of expansion space: 3.53961 m^3
Dead volume of compression space: 3.53961 m^3
Dimensions of dead volume containers: 1.524 m * 1.524 m * 1.524 m
Dimensions of swept volume for pistons: 1.524 m * 1.524 m * 1.859 m
Gas Constant (He): 2078.5 J/(mol*ºK)
Engine Pressure: 2068430 Pa == 300 PSI
Alternatively (or perhaps in addition), a 0.371612 m^2 surface area
of the expansion space can be heated and kept at a constant 600.3ºK.
However, the cost increases rapidly for this method as the surface
area increases, though actual power output difference between using
this surface-area-heat and the constant-volume-heat eludes me.
Thanks in advance!
myself have trouble with forming replies to questions asked.
However, I am unable to find details concerning how to calculate
Stirling engine RPS and watts. I have looked over Schmidt's theory
many times, and purused several dozen websites and .pdfs, including
those for educational, commercial, and recreational purposes.
Having exhausted said options, I turn here with my question: How may
the Revolutions Per Second and Watts of a Stirling engine be
determined? I do not have the means to construct one, nor the method
for physically testing and measuring the output it if I did. My
engine exists only as numbers on paper.
ANY help will be GREATLY appreciated.
Though a method would be prefered to an answer, I provide the
statistics:
The gas in the expansion space can be prevented from dropping under
330ºK.
The surface area of the compression space remains at 273ºK.
Swept volume of expansion piston: 4.31754 m^3
Swept volume of compression piston: 4.31754 m^3
Dead volume of expansion space: 3.53961 m^3
Dead volume of compression space: 3.53961 m^3
Dimensions of dead volume containers: 1.524 m * 1.524 m * 1.524 m
Dimensions of swept volume for pistons: 1.524 m * 1.524 m * 1.859 m
Gas Constant (He): 2078.5 J/(mol*ºK)
Engine Pressure: 2068430 Pa == 300 PSI
Alternatively (or perhaps in addition), a 0.371612 m^2 surface area
of the expansion space can be heated and kept at a constant 600.3ºK.
However, the cost increases rapidly for this method as the surface
area increases, though actual power output difference between using
this surface-area-heat and the constant-volume-heat eludes me.
Thanks in advance!