Stirlingengineforum.com

"What seems interesting to me about compressed air is as the air is compressed there is the heat of compression that could be recovered and used towards running a Stirling engine." I'm curious how you plan to capture that energy for reuse? Do you plan to keep the back work low by capturing...

Tom replied with the following in the "Heat is never hot or cold. Internal energy can be hot or cold." , thread. I thought it belonged more here, so will address it here. What I object to mostly is how (added) "heat" and (existing) "internal energy" are treated as equiv...

I'm assuming that you see, and perhaps accept the current engineering use of the difference of heat and internal energy. I'm moving and addressing the off topic post into the, "The TRUTH? η = 1 – (Qc / Qh) = 1 – (Tc / Th)", thread. The only way you could have an objection is if you accept ...

Yeah. Peltier's are temperature difference devices, not absolute temperature devices. Putting more energy into a Stirling Engine than it can use just rases the temperatures, and heat loss, mostly directly from the hot side. Definitely a good investigation.

The phase change engines usually run on the Rankin Cycle, steam engine. The original steam engines ran from the vacuum side of it. The water phase diagram, steam tables, are used to design those systems. Here is a Wikipedia page on.heat pipes: https://en.m.wikipedia.org/wiki/Heat_pipe Vacuum systems...

I think that chart is for steady state currents and temperatures and COP's.

At 0.1 times Amax, it will produce 10° of delta T, at a COP of 2.

At 0.2 times Amax, it will produce 20° of delta T, at a COP of .7

Very tiny amounts of power for small steady state COP's, and delta T's, max.

So does that mean the "M" is for Mythical. LOL Don't forget my Unicorn.

It doesn't look like it's supposed to run on ambient energy, as it shows an outside heat source just before that heat exchanger, rendering the heat exchanger useless. Qin #2.

Jack, I offer no disrespect. I think you should try it. We probably don't "know" anything. However, lots of people, some are scientists, have tried lots of things and gotten them to apparently work. Reinventing the wheel, or worse reinventing a failed square wheel, is time wasted. I've lea...

Tom, the Peltier displacer should work just fine. It will produce a temperature difference, hotter and colder inside the engine. The entire displacer chamber could be insulated and it will still work fine, maybe even better. I liked the hollow displacer rod and the wires running up through it. Put a...

Jack, I think you could use a vacuum cleaner and mason jar with a pinwheel like turbine inside for a simple test. A bit more testing could be done with a five gallon bucket and larger turbine. The following is an interesting homemade kinda inside out Tesla turbine: https://m.youtube.com/watch?v=h02V...

... "heat of compression" , a misleading statement. No heat involved. ... Your dissertation does not address Work . Seems to deny a work-heat relationship. "Heat of compression" is a transfer of energy. Work input results in an increase in temperature. Calling that increase in t...

Matt, Thanks for the kudos. I've procrastinated responding to this thread because I've been busy and the second and third posts have questions and comments that require careful wording. The easiest to explain is Jack's point. He is very close to understanding the difference between heat, work, compr...

I think the Phillips Company had nothing slip by. In the mid of century numbered "19", 1900's, they were building Stirling Engines and Cryo Coolers that people contributing to this forum only dream of. Thanks for the attaboys, and thanks for the ah rats too. The attaboys are more fun. LOL ...

In fact I'll do it again. Qh heat added from Tc to get to Th. Uh total energy contained in the gas at Th Uc total energy contained in the gas at Tc Qh=Uh-Uc 100=400-300 Heat equals the change in internal energy. Starting point one: Uc=MCvTc 300=MCv300 Maximum point two: Uh=MCvTh 400=MCv400 MCv= Mass...

Only the ratios are equivalent. Because the differences cancel.

That was shown many times over. The 45 pages of waste is from you not seeing the obvious.