Search found 112 matches
- Mon Apr 20, 2020 4:38 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Old stirling with a twist
- Replies: 9
- Views: 3899
Re: Old stirling with a twist
Sounds like an interesting project. I think the general issue with Stirling engines at the moment is three-fold: 1) Bulkier than internal combustion engines. 2) Very little demand for engines driven by solid fuel. 3) Lack of investment, leading to lower relative efficiency than internal combustion e...
- Tue Mar 24, 2020 5:30 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Please Someone help me , How Alpha Stirling engine works?
- Replies: 17
- Views: 13020
Re: Please Someone help me , How Alpha Stirling engine works?
Momentum. That is why a fly-wheel is part of every Stirling design.
- Tue Feb 25, 2020 9:03 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Gamma Engine with Bailey Linkages
- Replies: 2
- Views: 8729
Re: Gamma Engine with Bailey Linkages
I can't find any reference to "Bailey Linkages" online, and have never heard of them before - any chance of an explanation/link?
- Tue Jan 14, 2020 7:21 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Counterbalancing displacers
- Replies: 8
- Views: 31517
Re: Counterbalancing displacers
Doesn't it add an awful lot of friction to have the two displacer rods running inside each other?
- Mon Sep 02, 2019 4:00 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: manson engine with alternate breathing
- Replies: 4
- Views: 10436
Re: manson engine with alternate breathing
Probably not critical, but it seems to me that this is only going to work well if the engine is already running at a reasonably high speed, so might need a lot of 'assistance' to get started.
- Fri Jul 05, 2019 9:49 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Torque question.
- Replies: 3
- Views: 14353
Re: Torque question.
I would say that this is a question of finding the 'sweet spot'. If you think about it, if you have a displacer stroke of zero, then the working fluid doesn't get moved from hot to cold to hot, so no energy can be obtained, but at the other extreme, if you have an incredibly long displacer (and stro...
- Tue Jun 25, 2019 6:19 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Stirling engine software
- Replies: 7
- Views: 16267
Re: Stirling engine software
Nlog looks to be a very complex bit of software - in a commercial environment you would have to pay a lot of money to get anyone to write anything that sophisticated, but having said that half an hour to initialise (as mentioned on that site) does seem inordinately slow.
- Thu Jun 20, 2019 7:09 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Proposed Air Cooling Tower
- Replies: 7
- Views: 21050
Re: Proposed Air Cooling Tower
How long would you expect this to run? You would get a very high rate of evaporation from this, which would aid the cooling, but might make it 'unexpectedly' run dry.
- Thu Mar 28, 2019 7:05 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: My stirling engine school project
- Replies: 28
- Views: 34519
Re: My stirling engine school project
That diagram still shows a large space behind your diaphram, which will be detrimental to the performance of the engine - make that as small as possible, so that the pipe essentially just goes straight onto the back of the diaphram.
- Fri Jan 04, 2019 7:19 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Burnt pancake displacer (carbon foam)
- Replies: 10
- Views: 15048
Re: Burnt pancake displacer (carbon foam)
I can see this kind of material being useful for displacers, particularly if you are using an inert gas, but surely not very useful for "open air" applications (such as round the hot cap, as suggested). Basically, what you have is open-cell graphite, so given enough heat, and any amount of...
- Fri Aug 31, 2018 2:41 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Alpha vs Beta
- Replies: 3
- Views: 10348
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: 13712
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: 192981
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: 192981
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: 7984
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...