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Temperature is a measure of the average kinetic energy of the particles in a sample of matter, expressed in terms of units or degrees designated on a standard scale. So, kinetic energy transferred to the thermometer bulb. But Joules are also representative of energy transfer. So this is all about e...

Entropy. The thermodynamics definition boils down to: S = ∆Q/T Energy transfered, Joules, divided by Temperature, Kelvin. Both being real values therefore, Entropy S is a real concept and value, too. ... Not necessarily 2 hamsters / 2 cups of milk = 1 Milkster. 7 dinosaurs x 3 grapefruits = 21 grap...

Just arrived:

Not sure what your saying, but my point was basically that the gas is compressed making it hotter. Expanded making it colder. Work is taken out making it colder, work put in making it hotter. Even without a displacer, these events take place at different times changing the state of the working fluid...

"thermal-to-electrical" efficiency includes, presumably, conversion loses, mechanical transmission loses, and depends at least in part on the generator efficiency? Admittedly the "overall system efficiency" of even a 100% efficient engine would be very low for a coal fired plant ...

Wow, I just checked. It looks like the two Kontax engines will be delivered today!

Atmospheric pressure across the entire globe varies very little from 14.7 psi Good point. However that is exactly why we have wind - air mass "moving itself" in order to equalise _pressure_ differences caused (largely/entirely?) by temperature differences. Which rather brings me back to t...

A little strange the three "real world" examples chosen are antiquated steam power stations West Thurrock station built in 1957 was decommissioned in 1993 Candu Nuclear Station built between 1950-60 Larderello dubbed "Oldest geothermal power plant in the world" operational since ...

...The Otto cycle proved that compression could easily increase output, but the headbanger at the time was that it also could increase efficiency, and this took a long time to sort out... So what's the answer? How was it sorted out? How does compression increase efficiency? The best explanation I'v...

... BTW my original intent on this thread was that Tesla's cold hole appears valid on paper. I've got a few problems with it. Tesla wrote: the virtue of the principle I have discovered resides wholly in the conversion of the energy on the downward flow."... In other words. His thinking was sti...

The added energy has increased pressure, but temperature? Possibly, but this is apparently not essential. So how, or in what way is the engine "running on" i.e. powered by a temperature difference? I think this is the unicorn forest Matt always talks about. Explain the mechanism where pre...

But Tom, you can't deny that Stirling engines can run on hot and cold temperature diffentials can you? What is actually going on? Take away the extraneous trappings and look at what is actually happening with the working fluid and piston. You have a piston. Trapped air on one side, open atmosphere ...

... To say the engine "runs on a temperature differential" suggests or implies, or a causative relation. ... Should have been To say the engine "runs on a temperature differential" suggests or implies, or assumes a causative relation." Not sure what my phones rather over ze...

To add to the above. A Stirling engine, much like a heat pump or refrigerator, at least in part CREATES a temperature differential, or perhaps MAINTAINS the given temperature differential, it does not "run on" the temperature differential. To say the engine "runs on a temperature diff...

The new meter and thermocouples arrived today Compress_20240512_125355_5025.jpg For the experiment, when the engines arrive, I won't be posting to this thread though. As I don't think that is what Matt started the thread for. There is a previous thread where this experiment was first proposed I may ...