Search found 308 matches
- Tue Feb 07, 2017 11:01 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Disappointing
- Replies: 34
- Views: 31120
Re: Disappointing
Trevor, thinking about that P-40 single cylinder engine that produced 72hp you mentioned. Either it had a very inefficient burner or it is impossible. Considering that if the engine itself achieved 50% carnot efficiency, the outside area has to receive 100K joules per second and that will take a ver...
- Tue Feb 07, 2017 9:32 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Pressurization
- Replies: 27
- Views: 32764
Re: Pressurization
I know the right way to do it is to pressurize the crank case and let the working fluid to get into the engine through a valve. But my question is what is the difference between pressurizing the crank case and pressurizing the engine directly. Pressurizing the engine directly and letting the crank c...
- Mon Feb 06, 2017 7:37 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Pressurization
- Replies: 27
- Views: 32764
Re: Pressurization
Just my opinion, but I'm not a fan of very high pressure. I don't see a Stirling competing successfully with I.C.s or P.V.s; so a truly useful Stirling needs to use an alternate low-grade heat source and co-generate to make up for its low efficiency. That necessitates that the exchange area both in...
- Mon Feb 06, 2017 5:15 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Pressurization
- Replies: 27
- Views: 32764
Re: Pressurization
I was talking about this engine. The builder only pressurize the engine. The crank case is open to outside air.
[youtube]https://www.youtube.com/watch?v=LLzFi9aZcBM&t=93s[/youtube]
[youtube]https://www.youtube.com/watch?v=a5aket-HSYI&t=356s[/youtube]
[youtube]https://www.youtube.com/watch?v=LLzFi9aZcBM&t=93s[/youtube]
[youtube]https://www.youtube.com/watch?v=a5aket-HSYI&t=356s[/youtube]
- Mon Feb 06, 2017 8:48 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Stirling piston for a shaker table?
- Replies: 11
- Views: 9606
Re: Stirling piston for a shaker table?
No. The normal way is to attach an engine/motor to the table and mount an off center axis weight. When the motor turns, the whole table shakes.yes the normal way is to use a crank and shaft with a cam arrangement.
- Mon Feb 06, 2017 7:52 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Pressurization
- Replies: 27
- Views: 32764
Pressurization
I am getting a lot of conflicting information about pressurization. The standard way for pressurization is to simulate a higher atmospheric pressure, but most people I have seen just pressurize the engine, not the crank case. So what is it?
- Mon Feb 06, 2017 4:15 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Disappointing
- Replies: 34
- Views: 31120
Re: Disappointing
I pretty much want to read about this engine.It was a model P-40 Rider type engine with compressed hydrogen at 2200psi with a piston displacement of 492cc. The engine produced 72Hp at 4000 rpm.
- Sun Feb 05, 2017 5:57 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Stirling piston for a shaker table?
- Replies: 11
- Views: 9606
Re: Stirling piston for a shaker table?
why don't you just use a motor?
- Sun Feb 05, 2017 9:28 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Disappointing
- Replies: 34
- Views: 31120
Re: Disappointing
Yeah. How can you based your paper on a TMG, which technically is a toy. With a good counter flow burner, you can get the top end temperature much lower than the exhaust temperature.
- Fri Feb 03, 2017 4:16 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Disappointing
- Replies: 34
- Views: 31120
Re: Disappointing
I missed this.The university in your first part of this thread have another site I seem to remember in which they constructed (rather crudely I thought) a Stirling Engine using a V twin compressor, they seemed to wonder why it didn't work too well.
Ian S C
I guest they had no clue
- Fri Feb 03, 2017 7:34 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Disappointing
- Replies: 34
- Views: 31120
Re: Disappointing
All the news came from the same source. If he is going a build a stirling that gets that efficiency, he will have a lot of challenges. Is it possible? you bet. Just some facts. In general, a full size car need 300w per mile, and this is from real world data from many Tesla (X model) owners. My HighL...
- Fri Feb 03, 2017 4:15 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: 2 KWh LTD Stirling Engine
- Replies: 32
- Views: 75882
Re: 2 KWh LTD Stirling Engine
That does not make sense Ian. If the real situation is what you described, should WhisperGen be more efficient in the production of electricity? As I say, its electricity generation efficiency is less than 10%. The rest is heat and you can't sell heat back to the grid.
- Thu Feb 02, 2017 7:07 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: 2 KWh LTD Stirling Engine
- Replies: 32
- Views: 75882
Re: 2 KWh LTD Stirling Engine
Here is the problem Ian. WhisperGen is $20K. Their justification is that 1kW ELECTRICAL output. Most of the fuel is used to produce heat/HW and I can get an 30 gallon oil fire HW burner for less than $600, and on demand ones are much less. To me, it is a scam.
- Thu Feb 02, 2017 4:10 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Disappointing
- Replies: 34
- Views: 31120
Re: Disappointing
Seen that news a few times. If I am not mistaken, that's a Mod II engine. I will believe his claim when it happens.
- Wed Feb 01, 2017 10:47 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: 2 KWh LTD Stirling Engine
- Replies: 32
- Views: 75882
Re: 2 KWh LTD Stirling Engine
The whispergen has an over all electrical efficiency of 9% with a tiny regenerator and no economizer.