Search found 3471 matches
- Fri May 10, 2024 5:10 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Does a medium sized SE exist that could charge 12 V car battery properly?
- Replies: 8
- Views: 7604
Re: Does a medium sized SE exist that could charge 12 V car battery properly?
I first became aware of this ability of Stirling engines to "grow stronger" under a gradually increasing load reading a VITA publication authored by William Beale: PDF: https://pdf.usaid.gov/pdf_docs/pnaas739.pdf Compress_20240510_200747_7072.jpg This is probably the result of the added wo...
- Fri May 10, 2024 4:22 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Does a medium sized SE exist that could charge 12 V car battery properly?
- Replies: 8
- Views: 7604
Re: Does a medium sized SE exist that could charge 12 V car battery properly?
This engine made from water bottles, according to the description, is charging two 12 volt batteries. https://youtu.be/CXsFAB77Mzo Only a few watts though. How do you define "properly"? Almost any wattage will charge a battery eventually . Most common car battery chargers are between 2 amp...
- Fri May 10, 2024 3:37 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Does a medium sized SE exist that could charge 12 V car battery properly?
- Replies: 8
- Views: 7604
Re: Does a medium sized SE exist that could charge 12 V car battery properly?
15Watts for $499. Plus $150 shipping. :laugh: petrol shill :laugh: :laugh: What are you planning on firing your 15W generator with Tom? How much do you think it'll use? There is room for a lot of improvements. The displacer chamber and the displacer itself, I found, are made of ordinary steel, not ...
- Fri May 10, 2024 3:05 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Does a medium sized SE exist that could charge 12 V car battery properly?
- Replies: 8
- Views: 7604
Re: Does a medium sized SE exist that could charge 12 V car battery properly?
This is a nice little semi-DIY engine with 12v output potential.
Based around some cheap stainless steel cooking pots but would obviously take some skilled machining to actually build.
https://youtu.be/QcppEhp2RfA
Based around some cheap stainless steel cooking pots but would obviously take some skilled machining to actually build.
https://youtu.be/QcppEhp2RfA
- Fri May 10, 2024 12:39 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: The TRUTH? η = 1 – (Qc / Qh) = 1 – (Tc / Th)
- Replies: 500
- Views: 26174
Re: The TRUTH? η = 1 – (Qc / Qh) = 1 – (Tc / Th)
... The videos are awesome. Thanks for posting those. Watching the top of the displacer dome make liquid air recalls Tom's contention that mechanical work can reduce the temperature of the working fluid , ... That's hardly my "contention", it's a well established fact. Textbook physics/th...
- Fri May 10, 2024 11:52 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Tesla's Ambient Heat Engine revisted
- Replies: 144
- Views: 1773
Re: Tesla's Ambient Heat Engine revisted
... I'm trying to be open-minded about everything, so I definitely don't believe _anything_ about temperature distribution ... One thing that is fairly obvious. Atmospheric pressure across the entire globe varies very little from 14.7 psi By comparison air temperature can vary quite markedly, even ...
- Fri May 10, 2024 9:08 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Does a medium sized SE exist that could charge 12 V car battery properly?
- Replies: 8
- Views: 7604
Re: Does a medium sized SE exist that could charge 12 V car battery properly?
BTW, that eBay engine looks bigger than it actually is.
There is a pretty big compartment underneath just for housing the burner.
There is a pretty big compartment underneath just for housing the burner.
- Fri May 10, 2024 8:07 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Does a medium sized SE exist that could charge 12 V car battery properly?
- Replies: 8
- Views: 7604
Re: Does a medium sized SE exist that could charge 12 V car battery properly?
8 amps would be a good charge rate for a 12V car battery. That's 12*8 = 96 Watts An unpressurised SE using air making 100W might be fairly chunky unless its of Andy Ross level sophistication. Possibly bigger and heavier than my 40 year old Honda EG550 sidevalve generator, which will make 450W conti...
- Thu May 09, 2024 4:44 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Tesla's Ambient Heat Engine revisted
- Replies: 144
- Views: 1773
Re: Tesla's Ambient Heat Engine revisted
To prove gases contract. A plugged syringe at atmospheric pressure, temperature and half full must be put into an ice water bath. After the air cools and the atmosphere pushed, compresses, in the cold gas. Put the bath and syringe into a vacuum chamber and evacuate the air. It will need to stay con...
- Thu May 09, 2024 4:20 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: The TRUTH? η = 1 – (Qc / Qh) = 1 – (Tc / Th)
- Replies: 500
- Views: 26174
Re: The TRUTH? η = 1 – (Qc / Qh) = 1 – (Tc / Th)
How?
The heat engine runs a generator.
The heat is converted to electricity.
You can't return what's no longer there. Or anywhere. It's no longer heat at all.
The "heat" has been converted and has gone out as "work".
- Thu May 09, 2024 4:07 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: The TRUTH? η = 1 – (Qc / Qh) = 1 – (Tc / Th)
- Replies: 500
- Views: 26174
Re: The TRUTH? η = 1 – (Qc / Qh) = 1 – (Tc / Th)
... Your twisting of evidence, inconsistent logic, slippery slope and other logical fallacies are very plain to see. If the Carnot limit is 20%, the reversed Carnot will have a COP of 5, ideally. The two hooked together will return 100% of the heat back to the hot source, removing all heat rejected...
- Thu May 09, 2024 12:25 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Tesla's Ambient Heat Engine revisted
- Replies: 144
- Views: 1773
Re: Tesla's Ambient Heat Engine revisted
... ..., it all boils down to the fact that expanding internal gas outputs energy. Compressing gas absorbs energy. Both for the entire stroke. The system, engine, will put out energy during expansion and or absorb it depending on which way the pressure difference is compared with the motion. Higher...
- Thu May 09, 2024 9:00 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: The TRUTH? η = 1 – (Qc / Qh) = 1 – (Tc / Th)
- Replies: 500
- Views: 26174
Re: The TRUTH? η = 1 – (Qc / Qh) = 1 – (Tc / Th)
No it isn't. That is conservation of energy plain and simple. The Carnot limit contradicts conservation of energy.
The rest of your post, as usual, is mostly opinionated, largely incoherent rambling.
- Thu May 09, 2024 8:52 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: The TRUTH? η = 1 – (Qc / Qh) = 1 – (Tc / Th)
- Replies: 500
- Views: 26174
Re: The TRUTH? η = 1 – (Qc / Qh) = 1 – (Tc / Th)
I know you've seen the following two video links before. When you make engines as capable as these, or better, using your theories, people will be more willing to listen. Until then you will get a lot of opposition. Be very kind to those that stop to listen, and even kinder to those that enter into...
- Thu May 09, 2024 8:14 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Tesla's Ambient Heat Engine revisted
- Replies: 144
- Views: 1773
Re: Tesla's Ambient Heat Engine revisted
It's just one wishy-washy sequence in essentially an open chamber. The gas is free to move around. Even with the displacer fully raised, convection causes the cold gas to sink and be replaced by hot gas, which in turn is cooled, and again sinks. I know I mentioned the speed of sound before, but as ...