Search found 3221 matches

by Tom Booth
Wed Apr 17, 2024 6:18 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: The TRUTH? η = 1 – (Qc / Qh) = 1 – (Tc / Th)
Replies: 266
Views: 11032

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

Tom, by "removing rocks" you are reducing the inside pressure. .... ...That is why it will generate zero CYCLIC work. ... Even your description conveys zero work. Rocks are removed, forward stroke. All the same rocks are put back on, return stroke. Equal and opposite "rock" work...
by Tom Booth
Wed Apr 17, 2024 4:36 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: The TRUTH? η = 1 – (Qc / Qh) = 1 – (Tc / Th)
Replies: 266
Views: 11032

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

.... You still are, mechanically getting zero cyclic work out. That is also part of the Carnot theorem. Work out equals Th-Tc . You've described nothing more than an adiabatic steam spring. ... Actually, work out is Qh-Qc. That represents joules of heat transfered in less joules of heat transfered ...
by Tom Booth
Wed Apr 17, 2024 4:00 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: The TRUTH? η = 1 – (Qc / Qh) = 1 – (Tc / Th)
Replies: 266
Views: 11032

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

...Boiling removes energy from the liquid and adds it to the gas, zero heat. All done with work input. ... The transfer of energy: "Boiling removes energy from the liquid and adds it to the gas " by definition, IS heat . https://m.youtube.com/watch?v=glLPMXq6yc0 You still are, mechanicall...
by Tom Booth
Tue Apr 16, 2024 3:25 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: The TRUTH? η = 1 – (Qc / Qh) = 1 – (Tc / Th)
Replies: 266
Views: 11032

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

I've even demonstrated this recently. https://youtu.be/KBtv3skwfDw With water held at the boiling/condensation point just a very slight pressure change causes a transition between condensing and vigorous boiling. Do you really imagine such a rapid pressure change has any significant effect on the te...
by Tom Booth
Tue Apr 16, 2024 2:21 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: The TRUTH? η = 1 – (Qc / Qh) = 1 – (Tc / Th)
Replies: 266
Views: 11032

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

Maybe you are forgetting temperature is a measure of the average kinetic energy of a substance?
by Tom Booth
Tue Apr 16, 2024 1:20 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: The TRUTH? η = 1 – (Qc / Qh) = 1 – (Tc / Th)
Replies: 266
Views: 11032

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

The following quote from the following website : http://www.iapws.org/faq1/boil.html In the following table, we list the vapor pressure for water as a function of temperature as taken from the latest IAPWS formulation for general and scientific use. Temperature (degrees Celsius) Vapor Pressure (MPa...
by Tom Booth
Tue Apr 16, 2024 11:57 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: The TRUTH? η = 1 – (Qc / Qh) = 1 – (Tc / Th)
Replies: 266
Views: 11032

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

... Only during an adiabatic process does Caloric/heat not "fall"/flow,. You have described an adiabatic process. That is why it will generate zero CYCLIC work. ... No I haven't 1st convenient search reference: Isothermic reactions are characterized as reactions that occur in constant tem...
by Tom Booth
Tue Apr 16, 2024 11:30 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: The TRUTH? η = 1 – (Qc / Qh) = 1 – (Tc / Th)
Replies: 266
Views: 11032

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

Tom, by "removing rocks" you are reducing the inside pressure. Reduced pressure on water reduces the temperature at which it boils. That is a delta T. Sorry. ... No it isn't. Reducing the boiling point only means the water boils/changes phase to a gas much more readily at 100°C it does no...
by Tom Booth
Tue Apr 16, 2024 8:46 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: The TRUTH? η = 1 – (Qc / Qh) = 1 – (Tc / Th)
Replies: 266
Views: 11032

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

The essence of "Caloric theory" is that "the fall of Caloric" (temperature change) is the only metric and that without that there is zero work, zero efficiency. Such a view is based on obsolete, incomplete knowledge. I could, for example, envisage a "perfect" or "i...
by Tom Booth
Tue Apr 16, 2024 2:37 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: The TRUTH? η = 1 – (Qc / Qh) = 1 – (Tc / Th)
Replies: 266
Views: 11032

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

The rocks are the load... .... The magic answer is the flywheel ... Sure. The flywheel however is only a very small part of "the load". A "reversible" part. Around 7:00 I think, Kahn mentions that the gas does work putting "potential energy" into the rocks. The potenti...
by Tom Booth
Mon Apr 15, 2024 8:53 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: The TRUTH? η = 1 – (Qc / Qh) = 1 – (Tc / Th)
Replies: 266
Views: 11032

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

OK, well, suppose we all watch this video: https://youtu.be/aAfBSJObd6Y What is the taking away and replacing of the "pebbles" supposed to represent? This seems to be essential to the operation of the engine but in the real world people don't remove weights from the piston in their engine ...
by Tom Booth
Mon Apr 15, 2024 5:05 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: The TRUTH? η = 1 – (Qc / Qh) = 1 – (Tc / Th)
Replies: 266
Views: 11032

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

Right, so here is your typical Carnot cycle PV diagram: Carnot_cycle_p-V_diagram.jpg Perhaps one of you guys can determine the external load or shaft work output for this PV representation and explain how you arrived at that determination or value for mechanical torque, watts generated or whatever.
by Tom Booth
Mon Apr 15, 2024 12:32 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: 60L drum medium temp Gamma build
Replies: 42
Views: 14348

Re: 60L drum medium temp Gamma build

Do you have the power piston finished?

Are you still using a break diaphragm?
by Tom Booth
Mon Apr 15, 2024 9:29 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: The TRUTH? η = 1 – (Qc / Qh) = 1 – (Tc / Th)
Replies: 266
Views: 11032

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

I fist proposed the comparative engines running and not running on ice here: https://stirlingengineforum.com/viewtopic.php?p=3951 And included this illustration: tesla-test.gif One prediction of the outcome was: The experiment is worth trying, but my bet would be that the ice would melt fastest unde...
by Tom Booth
Mon Apr 15, 2024 7:53 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: The TRUTH? η = 1 – (Qc / Qh) = 1 – (Tc / Th)
Replies: 266
Views: 11032

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

... I tend to believe that in a piston engine, heat is largely not converted to work and that it does infact flow through the engine, if work is being done. ..... After what must have been several years of reading all kinds of conflicting views and theories spanning centuries, I didn't know what to...