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If possible, it would be nice if the P-V diagram and T-S diagram had consistent state labels. Brvman 07:04, 3 April 2014 (UTC) — Preceding unsigned comment added by Brvman ( talk • contribs)
The term Carnot efficiency redirects here, to Carnot Cycle.
Carnot efficiency, however, should have its own page, since the Carnot efficiency is a limit that cannot be exceeded by an method of converting heat to electricity, not merely by carnot engines. Geoffrey.landis ( talk) 21:49, 28 May 2008 (UTC)
this reads like a textbook. it is not very clear and expects people to understand calculus notation. i do not think it is necessary to be so technical, this aint rocket science. —Preceding unsigned comment added by 68.240.189.9 ( talk) 23:37, 28 July 2008 (UTC)
--Yep, a little bit of introductory info about this, more basic would be in the interest of this article and for others. The technical part, though is just as important. AkshayGenius ( talk) 21:38, 15 November 2008 (UTC)
I looked at this article on 12 April 2012, and the equations are not properly displaying in my IE 7 broswer. For instance, instead of getting math integral symbols, I see markup tags. — Preceding unsigned comment added by 192.35.35.34 ( talk) 19:07, 12 April 2012 (UTC)
I agree there should be a simpler introduction, something for high school students who haven't had calculus (yet). It's amusing that the page says this is best understood by examining a temperature-entropy diagram. Now if everyone just understood entropy, that would be fine. Jlhollin ( talk) 15:39, 28 November 2018 (UTC)
We need the P-V diagram back. Bring back the P-V diagram 220.227.165.210 ( talk) 08:51, 15 September 2008 (UTC)
The absence of a P-V diagram in this article renders it useless, the temperature entropy diagram it has gives no indication of how heat is converted into work by change of volume (the word volume does not appear in the text), which is the principle to be illustrated by any explanation of the Carnot (or any other heat engine) cycle. There isn't even a mathematical explanation of just how heat is converted to work. -- Damorbel ( talk) 07:20, 1 October 2009 (UTC)
Equations not rendering — Preceding unsigned comment added by 68.193.49.58 ( talk) 12:54, 13 April 2012 (UTC)
The Otto engine does not necessarily follow Carnot because combustible fuels release heat but also may release mechanical pressure, meaning they have a second pressure component in addition to heat, in that the exhaust products may take up more volume than the intake products at room temperature.
This article should clarify that, as contrary to many texts these engines do not always follow the Carnot cycle (which was originally intended for external combustion steam engines where any pressure component is lost to the exhaust). — Preceding unsigned comment added by 24.136.29.223 ( talk) 00:05, 8 June 2016 (UTC)
The labels should be Th and Tc, not T1 and T2, respectively. I changed T1 to Th and T2 to Tc in the text, but I don't know how to edit the svg image.
In the section heading Carnot's theorem, figure 6 shows a T-S diagram comparing a "real engine" with an ideal carnot cycle. The colors chosen for 'liquid' and 'vapour' are visually indistinguishable by those of us who are colorblind. In choosing colors for diagrams, it is important to use colors that have different light intensity. For instance (I am guessing about the colors in the diagram) a light blue for liquid and a dark pink for vapour. I am assuming that what is here is light blue and light pink, because I am unable to distinguish between those colors.
There is a lot of information out on the web that can help inform the color decisions when creating diagrams of this type. See the Wikipedia article on color blindness for more details. Rdm2020 ( talk) 14:10, 25 October 2018 (UTC)
It is stated that dU is an exact differential, but I cannot find a definition of U in the article. 97.113.94.112 ( talk) 14:06, 7 October 2020 (UTC)
Figure 6 is an image of an ST diagram for an idealised and realistic Carnot cycle, however both 'liquid' and 'vapour' are labelled as the same colour. This is easily fixed however I'm very new to editing Wikipedia so someone who knows what they're doing should probably fix it. NervousDendrite ( talk) 00:07, 28 May 2021 (UTC)
https://en.wikipedia.org/?title=Carnot_cycle&action=submit#Carnot's_theorem
The subsection Carnot's Theorem contains this "Thus, Equation 3 gives the..." but there is no equation numbered "3" in this article. Indeed none of the equations in the article are numbered. The digit 3 is actually a hypertext link that does not work. The hypertext is "Thus, Equation {{EquationNote|3}} gives the maximum". My hope is that someone who knows thermodynamics and who reads this talk page note will fix this, so that I will be able to find equation 3. Thanks Nick Beeson ( talk) 03:20, 15 March 2022 (UTC)