In an ideal Stirling cycle, the isochoric steps have heat exchanged across an infinitesimal temperature difference, which is maintained by the regenerator having a continuous gradient of temperature between the hot and cold reservoirs. The gas can then cool or heat in alignment with that gradient. This is the very ideal part of the design that enables zero change in entropy during the two isochoric stages. This heat is just shuffled back and forth internally and so the only actual exchange with the outside is in via the hot reservoir and out via the cold. Hence the ideal efficiency. I'm not sure it's correct to call what happens in the regenerator stages isothermal. The temperature is changing continuously but ideally always across an infinitesimal difference. Is there a commonly used term for that? None the less, the isochoric stages are very different to the isothermal stages.
I've noticed in my searches on the internet about the topic of Stirling engines that many sources confuse these ideas. I've often seen efficiency analyses that ignore the effect of the regenerator altogether. This is possibly to do with the fact that isochoric processes are not usually associated with zero change in entropy but in the case of the Stirling engine there is a very special type of this process involved, using a regenerator.
The ideal Stirling engine has the same efficiency as the Carnot cycle, but its advantage is that it enables the building of real engines that, although they may not be able to achieve perfect isothermal and totally smooth regenerator isochoric stages, they do come close and are much more feasible than the possibility of building a practical Carnot engine.
So, in reality, real manufactured Stirling engines do not achieve the full ideal Carnot efficiency, but many do much better than other types of heat engine.
In conclusion, in consideration of the ideal Stirling engine:
(1) The ideal maximum efficiency of the Carnot engine is achieved. (2) Your calculation does not contradict this because it is wrong. You include the heat exchanged in the isochoric stages as part of the cost, whereas the only cost is the external heat input during the isothermal power stroke. (3) This cycle is reversible as there is no change in entropy during the isochoric stages. (4) The diagram on its own is not enough to show this as we need to also know that the ideal regenerator is what enables the third point. That is, if you remove the regenerator the diagram is still the same.How to get rid of cellulite on butt? What is is called when your mind tricks you into seeing something? What tricks has dana young done to bob buesing? How long does it take for a suppository to work? What is the meaning of howled? How to lock apps on android? What are we voting for today in georgia? Tips when recording vinyl into reaper levels? What does push p mean? What does eel sauce taste like? What is solid white line road meaning? What does irie mean? How to know if my dog is pregnant? What percent of tax is taken on tips? What is the meaning of the word cosmos? What does yu mean? What can be the meaning of the deep sleep cast on the man? What does gs mean? How to know if chicken is bad? Show where two guys do magic tricks? I meant what i said meaning? How to stream yellowstone? What does drs mean in formula 1? What does it mean when a guy calls you beautiful? What does a cashier's check look like? What does it mean to drop the soap? What does bovine mean? What is the meaning of sta? What is the meaning of the name russell? What does it mean when the engine light is on? What channel does? Wow how to get rid of newbie tips in map? How to stretch biceps? How to download maps on google maps? What does ntm mean? What is the full meaning of u.n.i.v.a.c? How to make tteokbokki? How to cook zucchini? How to transfer apple pay to bank? What is italian seasoning? What was noel original meaning in latin? What is the meaning of halloween day? How to be the other woman tips? What devices are compatible with spectrum tv app? What is tapioca made of? How to change twitter @? How do you use tricks of the trade ijn pvp? What does arigato mean? How to draw stitch? How to smile? How to become a notary public? How to unclog nostril? How to lose belly fat fast in 1 week with 9 foods and 7 tips? What is cellulitis? Tricks to feeling better when you have a stomach virus? why is google chrome helper using so much cpu What is the meaning of dtb? What are the vertical tips on a wing do? How to double your money? What does anthrax look like? What does pms mean? What does hollow tips do? What does automatic transmission mean? What shows are on apple tv? How to check blood pressure at home? What is snap benefits? What does duma mean? Netflix movie where magician reveals tricks? How to count heart rate? What are the best nail tips to use? How to get blood out of jeans? What does tnr mean? How to reset google home? Is it ok if i own a bmx and dont know how to do tricks? How to use roblox gift card? How to turn off firestick? How to harmonize? How to remove stickers? what is steam client web helper How to make a water bottle bong? how to stop google helper from using memory on mac Css how to make a bacgound imag that fits on the screen css tricks? What is the meaning of a diamond? What does rigger mean? What does psi stand for? Video meme where kid playing football tricks other team false start? What is the first letter of a four letter word meaning to go in search of c? What is the meaning of the promised land? How to get a lot of tips on chaturbate? What does knock on wood mean? what is an hvac helper supposed to know What time does sam's club gas station close? What does it mean when poop floats? How to make a bracelet with string? What are the boroughs of new york? What does counterfeit mean? What is the meaning of wrung? What does a bean mean? What does heirloom mean? When do babies say mama'' and mean it? What is the meaning of payroll tax? What are jiggers?