Piston Displacer or Dual Piston Engine

Discussion on Stirling or "hot air" engines (all types)
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sham.MY
Posts: 11
Joined: Mon Oct 31, 2016 6:26 pm

Piston Displacer or Dual Piston Engine

Post by sham.MY » Fri Nov 11, 2016 9:07 am

Image

Based on this picture,
are this Stirling engine a Piston Displacer Engine or a Dual Piston Engine?
Hope you guys would help me with this.

Ian S C
Posts: 2221
Joined: Thu Dec 02, 2010 5:15 am
Location: New Zealand

Re: Piston Displacer or Dual Piston Engine

Post by Ian S C » Sat Nov 12, 2016 12:02 am

The engine shown is commonly known as an ALPHA type motor, this is what you call a dual piston engine. The format of this one is a Ross Yoke type, developed by Andy Ross in the USA. Hot piston on the left, cold on the right.
Ian S C

sham.MY
Posts: 11
Joined: Mon Oct 31, 2016 6:26 pm

Re: Piston Displacer or Dual Piston Engine

Post by sham.MY » Sat Nov 12, 2016 1:25 am

I have found this formula in a Stirling Engine Design Manual Book

P = Bn x p x f x Vo
P - engine power
Bn - beale number
p - pressure
f - frequency
Vo - ?

i have determine all the value of P, Bn, p and f. I just want to know what is Vo represent,
is Vo a total volume or expansion volume?
If both are not, what is Vo?

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