Search found 8 matches

by blairmc
Fri Mar 18, 2011 4:48 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Definitions for Stirling Analysis
Replies: 0
Views: 4648

Definitions for Stirling Analysis

Could someone explain in more detail the following items: 1. Free flow area of the regenerator, expansion, and compression areas. I have not been able to find the formula. 2. Normalized length of the regenerator, expansion, and compression areas. 3. Normalized hydraulic radius of each. 4. How do you...
by blairmc
Tue Mar 15, 2011 9:53 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Free Piston Stirling Engine
Replies: 1
Views: 3179

Free Piston Stirling Engine

Does anyone know of good references on the web regarding free piston Stirling engines? How does one determine the size of the bounce cavity and the mass of the displacer? I am interested in a linear alternator so that the entire engine is encased and therefore the internal pressure can be high. Thanks
by blairmc
Fri Mar 11, 2011 12:57 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Design/Build One HP Alpha Stirling Engine
Replies: 33
Views: 28624

Re: Design/Build One HP Alpha Stirling Engine

Can someone explain these based on the above image? Thanks, Michael Don't know exactly what you mean. Both the left and right engines are of double acting alpha type. As for the regenerator, it should be designed to be able to absorb/release the amount of heat injected into the engine in one cycle ...
by blairmc
Fri Mar 11, 2011 11:39 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Design/Build One HP Alpha Stirling Engine
Replies: 33
Views: 28624

Re: Design/Build One HP Alpha Stirling Engine

Stirling_Engine_Design.jpg In reading the design spreadsheet from SESUSA, it talks about the length of the regenerator, the diameter of the regenerator housing, the free-flow area of the regenerator, the diameter of the regenerator wire, the mesh number of the wire mesh, and the number of gauzes in...
by blairmc
Thu Mar 10, 2011 9:24 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Design/Build One HP Alpha Stirling Engine
Replies: 33
Views: 28624

Re: Design/Build One HP Alpha Stirling Engine

Engine close in a shell, needs inside also a start motor (or the generator that supply starting action). In fact the motor have to be started...., as all thermical engines The use Hydrogen or helium, instead of air nitrogen impacts on dimension of tube/clearances, for eat exchanges (hot side-cols s...
by blairmc
Thu Mar 10, 2011 9:22 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Design/Build One HP Alpha Stirling Engine
Replies: 33
Views: 28624

Re: Design/Build One HP Alpha Stirling Engine

Engine close in a shell, needs inside also a start motor (or the generator that supply starting action). In fact the motor have to be started...., as all thermical engines The use Hydrogen or helium, instead of air nitrogen impacts on dimension of tube/clearances, for eat exchanges (hot side-cols s...
by blairmc
Tue Mar 08, 2011 7:40 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Design/Build One HP Alpha Stirling Engine
Replies: 33
Views: 28624

Re: Design/Build One HP Alpha Stirling Engine

If you used helium as a working fluid, what pressures are common?
by blairmc
Tue Mar 08, 2011 7:02 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Design/Build One HP Alpha Stirling Engine
Replies: 33
Views: 28624

Design/Build One HP Alpha Stirling Engine

Where can I find more information on how to build a one horsepower alpha stirling engine? Are detailed design plans available? How does one evaluate using air or helium as a heat transfer medium? How or can one create a sealed bushing sufficient enough to keep the helium within the pressurized chamb...