Search found 307 matches

by Fool
Wed May 08, 2024 8:30 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Compression cycle.. worthwhile?
Replies: 11
Views: 9837

Re: Compression cycle.. worthwhile?

"Ah..., that doesn't apply to Stirling engines", I've been told again and again. If not, why not. The energy represented on a PV diagram depends on path, and the direction traveled on the path. The initial difference between a Stirling Engine and a Stirling cooler is the direction taken o...
by Fool
Wed May 08, 2024 7:57 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Regenerators.... Have I got it straight what they do?
Replies: 8
Views: 1517

Re: Regenerators.... Have I got it straight what they do?

Matt ran into the problem, in one of his schemes, that the temperature of the regenerator was significantly higher than the regenerator so was ineffective in that adiabatic temperature range of the cold plate. Conversely it didn't get high enough either, for the hot plate. Changed his theoretical ef...
by Fool
Wed May 08, 2024 7:33 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Tesla's Ambient Heat Engine revisted
Replies: 110
Views: 1182

Re: Tesla's Ambient Heat Engine revisted

hopefully others will verify the results with their own independent research. I'm not looking for a "following". Following your experiments to verify them, is different from a following. But you knew that anyway, and thought the statement sounded cool, misleading, but cool. What I'm still...
by Fool
Wed May 08, 2024 7:01 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: The TRUTH? η = 1 – (Qc / Qh) = 1 – (Tc / Th)
Replies: 487
Views: 25198

Re: The TRUTH? η = 1 – (Qc / Qh) = 1 – (Tc / Th)

Try not to tell people about me, you obviously know nothing about me. Your ignorance appears to be fostering your arrogance.
by Fool
Wed May 08, 2024 6:57 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: The TRUTH? η = 1 – (Qc / Qh) = 1 – (Tc / Th)
Replies: 487
Views: 25198

Re: The TRUTH? η = 1 – (Qc / Qh) = 1 – (Tc / Th)

The only thing more ignorant than "Get what?". Is thinking there is a god.

Try to stay out of the fantasies. Even Charles Schultz gets it. Feynman was talking about how the ability to find errors in science books makes a student smarter, and complaining about them, even fixing them, not.
by Fool
Wed May 08, 2024 6:51 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: The TRUTH? η = 1 – (Qc / Qh) = 1 – (Tc / Th)
Replies: 487
Views: 25198

Re: The TRUTH? η = 1 – (Qc / Qh) = 1 – (Tc / Th)

Some don't get it.
Some don't get it.
image000000.png (136.26 KiB) Viewed 7 times
by Fool
Mon May 06, 2024 6:36 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: The TRUTH? η = 1 – (Qc / Qh) = 1 – (Tc / Th)
Replies: 487
Views: 25198

Re: The TRUTH? η = 1 – (Qc / Qh) = 1 – (Tc / Th)

No I'm not a "good student". Sorry to disappoint I think the quote is "smart students". I can tell. Smart students learn how to identify errors in teaching, learning, and experimenting. The rest, who cares. They won't be doing much productive anyway. Why would your not getting i...
by Fool
Mon May 06, 2024 6:20 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Tesla's Ambient Heat Engine revisted
Replies: 110
Views: 1182

Re: Tesla's Ambient Heat Engine revisted

https://m.youtube.com/watch?v=P11q-BAhvqk You claim the engine was running for three hours, but it is clearly removed from the heat seconds before all measurements are made. Placed on a "cold" ambient table cooling it enough that even when placed back on the water cup, with mist coming off...
by Fool
Mon May 06, 2024 6:12 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: The TRUTH? η = 1 – (Qc / Qh) = 1 – (Tc / Th)
Replies: 487
Views: 25198

Re: The TRUTH? η = 1 – (Qc / Qh) = 1 – (Tc / Th)

Adiabatic.svg.png Top left of adiabatic is point 2. Isentropic expansion follows down thick green line, and does positive work equal to the shaded green area under the curve. Compression returns along the same line back to point 2. Requires work input equal to the shaded green area under the thick ...
by Fool
Mon May 06, 2024 4:44 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Tesla's Ambient Heat Engine revisted
Replies: 110
Views: 1182

Re: Tesla's Ambient Heat Engine revisted

No. It's just modeling a wall, and given surface temperatures. The constant temperatures outside are standard heat source and sink models. That is similar to all the high and low constant temperature.sources used to model engines. As Feynman said, "TSOWGI". It's supposed to show how heat f...
by Fool
Mon May 06, 2024 1:38 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: The TRUTH? η = 1 – (Qc / Qh) = 1 – (Tc / Th)
Replies: 487
Views: 25198

Re: The TRUTH? η = 1 – (Qc / Qh) = 1 – (Tc / Th)

"You just skip 1 and go straight to 2?" You are proposing a series of adiabatic processes that start at point 2. The only adiabatic path available is the one that starts at point two, where you switch to adiabatic processes, follows an adiabatic expansion line forward until all motion is e...
by Fool
Mon May 06, 2024 1:26 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Tesla's Ambient Heat Engine revisted
Replies: 110
Views: 1182

Re: Tesla's Ambient Heat Engine revisted

n=1-Tc/The

1-300/400 = 0.25
1-1000/1200 = 0.166

Wider ∆T lower efficiency! How come?
by Fool
Mon May 06, 2024 1:15 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Tesla's Ambient Heat Engine revisted
Replies: 110
Views: 1182

Re: Tesla's Ambient Heat Engine revisted

https://www.engineeringtoolbox.com/cond ... d_428.html
Conductive heat transfer.
Conductive heat transfer.
conductive_heat_transfer.png (13.84 KiB) Viewed 87 times
by Fool
Sun May 05, 2024 7:14 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Tesla's Ambient Heat Engine revisted
Replies: 110
Views: 1182

Re: Tesla's Ambient Heat Engine revisted

I keep thinking that acrylic is transparent to infrared, so what is the camera reading that has that temperature? Also when there is a wall, the temperature difference between the inside and outside is an indicator of how much heat is being ejected. A function of delta T and R value. I also think th...
by Fool
Sun May 05, 2024 6:56 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: The TRUTH? η = 1 – (Qc / Qh) = 1 – (Tc / Th)
Replies: 487
Views: 25198

Re: The TRUTH? η = 1 – (Qc / Qh) = 1 – (Tc / Th)

Is this supposed to be isochoric heat addition at TDC? Yes. V1 V2, point 1 to point 2, isochoric heat addition. V1=V2. You got it. Isochoric. Is there a point 1 ? Yes. Qcz, V1, T1, P1. Engine cycle starting point. Point 2. Qhz Beginning of isentropic expansion stroke. End of isentropic compression ...