Search found 102 matches
- Fri Aug 31, 2018 2:41 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Alpha vs Beta
- Replies: 3
- Views: 10262
Re: Alpha vs Beta
So if the power-to-weight advantage is due to the 1:1 ratio, why isn't that used for the other configurations?
- Fri Aug 31, 2018 2:36 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Dual stirling generators electrically heated
- Replies: 16
- Views: 13297
Re: Dual stirling generators electrically heated
Running two engines off a single flame is not the same thing - the flame isn't dependant on the output of either engine. Unfortunately, every type of engine has an upper-limit to efficiency - this is often described as being a "Theoretical Limit" but that isn't really good grammar, as ther...
- Fri Jun 15, 2018 5:18 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Tesla's "Ambient Heat Engine" Experiment
- Replies: 175
- Views: 188377
Re: Tesla's "Ambient Heat Engine" Experiment
Is that a double displacer there? and 180 degrees out of phase with each other?
- Wed Jan 10, 2018 6:13 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Tesla's "Ambient Heat Engine" Experiment
- Replies: 175
- Views: 188377
Re: Tesla's "Ambient Heat Engine" Experiment
So, if no heat ever goes into the ice, what effect does it have on the system???? I think what Tesla was really getting at, (probably incorrectly) was that if the engine was 100% efficient (no chance) then the _output_ of the engine could be used to cool the ice/cold end. Which sounds to me rather l...
- Fri May 19, 2017 6:25 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Multi cylinder Stirling engine question.
- Replies: 4
- Views: 7771
Re: Multi cylinder Stirling engine question.
What info are you looking for? I'd have thought that the problems involved in building an eight cylinder engine are pretty much the same as for twelve cylinders, just with different angles. (And not necessarily then - sometimes multi-cylinder IC engine designs are merely two/three/four cylinder desi...
- Tue Apr 25, 2017 4:59 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Volum alfa model
- Replies: 26
- Views: 22359
Re: Volum alfa model
That picture shows the cylinder being vented at the right hand side - is that a mistake in the drawing, or how you've built it??
- Tue Apr 25, 2017 4:50 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Carnot and Stirling cycles
- Replies: 3
- Views: 6368
Re: Carnot and Stirling cycles
Even in an ideal Stirling Engine the piston has to move to draw power, which will result in a small change in volume.
- Tue Mar 14, 2017 8:58 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Stirling Generators
- Replies: 8
- Views: 11316
Re: Stirling Generators
Do you want enough power to run a computer, or just enough to be able to charge a device - there's a massive difference between the two figures.
- Fri Oct 14, 2016 4:10 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Tesla's Heat Engine
- Replies: 19
- Views: 18889
Re: Tesla's Heat Engine
Sounds to me like you are talking about a variation on what is currently known as an "Air Source Heat Pump"
I can't say I understand it well enough though, to do the maths to check whether it is theoretically possible or not.
I can't say I understand it well enough though, to do the maths to check whether it is theoretically possible or not.
- Fri Sep 04, 2015 7:09 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: varible phasing
- Replies: 27
- Views: 24259
Re: varible phasing
For the record, you can also get small ball bearings out of certain types of computer back-up tapes - I've grabbed a few from DLT tapes.
But am I reading you correctly - the 'proper' ball bearings have _more_ friction than your 'hand made' bearings?
But am I reading you correctly - the 'proper' ball bearings have _more_ friction than your 'hand made' bearings?
- Fri Sep 04, 2015 6:47 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: 500kw/5MW
- Replies: 3
- Views: 5665
Re: 500kw/5MW
Of course it's _possible_ - though you might find it easiest to build a farm of smaller engines, or a single large engine with a large number of pistons. Whether it is in anyway financially viable is a different story, but it seems highly unlikely. Most people build Stirlings as a hobby, or to get a...
- Fri Jun 26, 2015 7:52 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Gamma not working
- Replies: 66
- Views: 37355
Re: Gamma not working
That sealing looks to me like it is going to introduce an awful lot of friction.