Search found 308 matches

by Aviator168
Tue Feb 07, 2017 11:01 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Disappointing
Replies: 34
Views: 16271

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...
by Aviator168
Tue Feb 07, 2017 9:32 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Pressurization
Replies: 20
Views: 10241

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...
by Aviator168
Mon Feb 06, 2017 7:37 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Pressurization
Replies: 20
Views: 10241

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...
by Aviator168
Mon Feb 06, 2017 5:15 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Pressurization
Replies: 20
Views: 10241

Re: Pressurization

I was talking about this engine. The builder only pressurize the engine. The crank case is open to outside air.
[youtube][/youtube]

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by Aviator168
Mon Feb 06, 2017 8:48 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Stirling piston for a shaker table?
Replies: 11
Views: 5197

Re: Stirling piston for a shaker table?

yes the normal way is to use a crank and shaft with a cam arrangement.
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.
by Aviator168
Mon Feb 06, 2017 7:52 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Pressurization
Replies: 20
Views: 10241

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?
by Aviator168
Mon Feb 06, 2017 4:15 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Disappointing
Replies: 34
Views: 16271

Re: Disappointing

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.
I pretty much want to read about this engine.
by Aviator168
Sun Feb 05, 2017 5:57 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Stirling piston for a shaker table?
Replies: 11
Views: 5197

Re: Stirling piston for a shaker table?

why don't you just use a motor?
by Aviator168
Sun Feb 05, 2017 9:28 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Disappointing
Replies: 34
Views: 16271

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.
by Aviator168
Fri Feb 03, 2017 4:16 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Disappointing
Replies: 34
Views: 16271

Re: Disappointing

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 missed this.
I guest they had no clue
by Aviator168
Fri Feb 03, 2017 7:34 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Disappointing
Replies: 34
Views: 16271

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...
by Aviator168
Fri Feb 03, 2017 4:15 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: 2 KWh LTD Stirling Engine
Replies: 28
Views: 18195

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.
by Aviator168
Thu Feb 02, 2017 7:07 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: 2 KWh LTD Stirling Engine
Replies: 28
Views: 18195

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.
by Aviator168
Thu Feb 02, 2017 4:10 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Disappointing
Replies: 34
Views: 16271

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.
by Aviator168
Wed Feb 01, 2017 10:47 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: 2 KWh LTD Stirling Engine
Replies: 28
Views: 18195

Re: 2 KWh LTD Stirling Engine

The whispergen has an over all electrical efficiency of 9% with a tiny regenerator and no economizer.