Search found 3560 matches
- Mon May 20, 2024 10:43 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Tesla's "Ambient Heat Engine" Experiment
- Replies: 194
- Views: 193567
Re: Tesla's "Ambient Heat Engine" Experiment
Heat is not internal energy. To imply that the two are the same, as you often do, is misleading. To claim gases contract, as you do, is misleading. A Stirling engine has to concentrate heat by other means, certainly not by heat being "rejected to the cold plate". Especially considering at...
- Mon May 20, 2024 8:04 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Tesla's "Ambient Heat Engine" Experiment
- Replies: 194
- Views: 193567
Re: Tesla's "Ambient Heat Engine" Experiment
The "lost" kinetic energy is converted into heat. What is less misleading? 1: The "lost" kinetic energy is converted into heat. 2: The "lost" kinetic energy is converted into internal energy as seen by a temperature and pressure rise in the gas. Two ways of saying the ...
- Mon May 20, 2024 7:39 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Tesla's Ambient Heat Engine revisted
- Replies: 226
- Views: 3107
Re: Tesla's Ambient Heat Engine revisted
... The orifice works by the pressure drop from flow. ... ...I still contend, am skeptical, that the reduced size tube is insufficient for the pump and claimed performance. Pinching the tube to make a smaller orifice might help, ... P.S., orifices need liquid to work properly. It takes more pressur...
- Mon May 20, 2024 4:24 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Tesla's "Ambient Heat Engine" Experiment
- Replies: 194
- Views: 193567
Re: Tesla's "Ambient Heat Engine" Experiment
At the start of the compression stroke (in a Stirling engine) the working fluid is cooling and contracting and the piston is driven in by atmospheric or buffer pressure. And where is the heat from this "cooling" going ??? The preference would be to have a drop in temperature that results ...
- Mon May 20, 2024 4:07 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Tesla's Ambient Heat Engine revisted
- Replies: 226
- Views: 3107
Re: Tesla's Ambient Heat Engine revisted
The capillary tube is the "orifice". It's diameter and length must be sized to the pressure difference, and flow rate. Longer and narrower for lower flows and higher pressure drops. Shorter and wider for higher flows an lower pressure drops. Higher pressure drops are needed for higher tem...
- Mon May 20, 2024 3:38 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Carnot was being too generous
- Replies: 22
- Views: 293
Re: Carnot was being too generous
This is a diagram of the 12.5-kW Stirling convertor built by Mechanical Technology Inc. (MTI) Resize_20240520_054933_3508.jpg As can be seen it incorporates a heater and cooler virtually sandwiched together on either side of a regenerator of modest extent. In other words, it is not only possible, bu...
- Sun May 19, 2024 3:36 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Carnot was being too generous
- Replies: 22
- Views: 293
Re: Carnot was being too generous
Why would anyone pay for something that doesn't work? No. Indoctrinated does not equal educated. Education teaches to be skeptical, inquisitive, and comprehensive. Only the well educated would realize that. When (science) "education" has no basis in the real world. No empirical evidence t...
- Sun May 19, 2024 3:15 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Tesla's "Ambient Heat Engine" Experiment
- Replies: 194
- Views: 193567
Re: Tesla's "Ambient Heat Engine" Experiment
Towards the end of the Stirling's compression stroke the displacer is moving the gas to the hot side, and the regenerator is heating the gas. Your description is misleading. True, (in bold) but so what? https://stirlingengineforum.com/viewtopic.php?t=5556 You want all the heat you can get at TDC. C...
- Sun May 19, 2024 3:06 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Tesla's "Ambient Heat Engine" Experiment
- Replies: 194
- Views: 193567
Re: Tesla's "Ambient Heat Engine" Experiment
A turbo charged diesel engine uses an intercooler between the compressor and intake to the cylinder. Apples to oranges. The intercooler is to prevent OVERHEATING because the turbocharger is hot, being powered by exhaust gases. Different purpose, different application. In an IC engine you want dense...
- Sun May 19, 2024 2:03 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: The Carnot efficiency problem
- Replies: 264
- Views: 119837
- Sun May 19, 2024 1:55 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: The Carnot efficiency problem
- Replies: 264
- Views: 119837
- Sun May 19, 2024 1:02 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Tesla's Ambient Heat Engine revisted
- Replies: 226
- Views: 3107
Re: Tesla's Ambient Heat Engine revisted
For butane the vacuum side is below 1 atmosphere. To get to -30°C the vacuum would need to be about 0.5 ATM From looking at the specs of similar small vacuum pumps sold on Amazon, it looks to me like that might just be possible. Anyway, I don't see any major theoretical flaws in the design but the p...
- Sun May 19, 2024 10:43 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: The Carnot efficiency problem
- Replies: 264
- Views: 119837
Re: The Carnot efficiency problem
... When you have those two values, work out .. blah blah blah... We will reconsider your temperature anomaly. ... I could care less what you or "we" consider or don't consider. Your concerns are not my concerns. Do your own experiments. Seems like you have nothing better to do than gawk ...
- Sun May 19, 2024 10:33 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Tesla's "Ambient Heat Engine" Experiment
- Replies: 194
- Views: 193567
Re: Tesla's "Ambient Heat Engine" Experiment
Another thing I think happens is on the return stroke the air in the cylinder is compressed, maybe not to the extent that air is compressed in a fire piston, but the principle is the same. https://youtu.be/-39wmSBO2FM It seems strange that you have ignored that fact and are now attempting to conjur...
- Sun May 19, 2024 9:51 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Tesla's Ambient Heat Engine revisted
- Replies: 226
- Views: 3107
Re: Tesla's Ambient Heat Engine revisted
... I just have one more question, how does ipoo get -32 degrees C out of a chemical that boils at 10 degrees F, in a system that is running at atmospheric pressure? ... Funny how you believe the video can be easily faked by letting butane evaporate on the outside of the pipe, but can't believe the...