Heat Engines - 2nd Law of Thermodynamics | Thermodynamics | (Solved examples)

Learn about the second law of thermodynamics, heat engines, thermodynamic cycles and thermal efficiency. A few examples are solved at the end of the video as well to elaborate on the new principals explained.
🔸Mass Flow: • Forms of Energy & Mass...
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Intro (00:00)
Heat Engines (01:38)
Thermodynamic Cycles (02:44)
Thermal Efficiency (04:05)
Kelvin-Planck Statement (06:25)
A 600 MW steam power plant which is cooled by a nearby river (07:10)
An Automobile engine consumed fuel at a rate of 22 L/h and delivers (08:29)
A coal burning steam power plant produces a new power of 300 MW (10:12)
Books used:
📘Çengel Yunus A. and M. A. Boles, Thermodynamics: an engineering approach. New York, NY: McGraw-Hill Education, 2016.
📘C. Borgnakke and R. E. Sonntag, Fundamentals of thermodynamics. Hoboken, NJ: Wiley, 2019.
#thermodynamics #secondlawofthermodynamics #heatengine #engineering

[@randhamid4535]

this channel deserves more recognition. Thank you for clearing out all of my confusion and drawing a solid bird-eye view of the material. This really grounded me and made me understand what I was missing!

[@QuestionSolutions]

Wow, thank you! I am really glad you found it helpful.

[@mrxcellar8913]

Once again thank you for keeping on teaching us. You are one of the most prestigious teachers on this youtube platform. Sorry for being demanding but can you do advanced chapters of thermodynamics 2 as well?

[@QuestionSolutions]

Thank you very much! Right now, my plan is to cover the chapters needed for a 1st or 2nd year course. Usually, there are some overlap with those and advanced chapters. My goal is to create a few playlists of all the fundamental courses so students can grasp those concepts and hopefully make their transition to more advanced courses easier. So I might not go really deep into the advanced topics because I will switch to another subject and cover the basics of that. But I will do my best so let's see where that takes us :)

[@muhammadharis8925]

How are you umar?

[@Redant1Redant]

Wow. I am only 1:35 in, and he has ready said about Heat Engines better than I have ever heard it explained before. Well, done. I am now excited to watch the rest :-)

[@QuestionSolutions]

Thank you very much! I hope it was helpful to you :)

[@ukc155]

hey, love your channel from turkey!if you could make a series about mechanics of materials it would be so helpful.Keep up the good work!

[@QuestionSolutions]

Thank you very much. It's on my to-do list, though I don't know when I will get to it 😅

[@yigitcanbaysal824]

Hi again I have another question here about 3:58 .Why Wnet equals to _Wout - Win_ but not _Win - Wout_ ? I am grateful ,you always help with your viewers' questions 🙂

[@QuestionSolutions]

So in a heat engine, our goal is to get work output. But a heat engine requires energy for it to work. So if you want to figure out how much net work output was "created" by the heat engine, then you have to subtract the amount of work that was put into the system from the amount of work that was produced by the system.

[@yigitcanbaysal824]

@@QuestionSolutions Oh I see.Lastly why we add _out_ in the subscript for *Wnet* and it becomes *Wnet,out*?

[@QuestionSolutions]

Out, as in output. So what is the total net output, or in simple terms, what did we gain from this heat engine. @@yigitcanbaysal824

[@Barney-ps8bl]

could you do a series on mechanics of materials your videos are so far above anything else I can find online and it's a subject I struggle with at university

[@QuestionSolutions]

It's definitely on my to-do list but I don't know when I will be able to get to it :(

[@dossanifamily2226]

What is next on your list of courses to make a playlist on? These basic vids are extremely powerful!

[@QuestionSolutions]

Right now, I am leaning towards electric circuit analysis. I don't know when I can start that yet, but I will see. I also need to create some shorter videos covering how to solve simultaneous equations, when to use sine or cosine, etc., since I get a ton of questions on those fundamental topics.

[@qudhachure9598]

I appreciate your effort in helping us thanks a lot. are you planning to create videos about vibrations

[@QuestionSolutions]

Yes, I will but probably not soon 😅

[@mikejonson8292]

very good explanation, that's true. When do u upload new video about COP?

[@QuestionSolutions]

Probably soon when I do a video on refrigerator cycles.

[@user-ui6vz3zv8r]

May you please explain entropy and thank you for this great work

[@QuestionSolutions]

I am planning on it, but it's been incredibly busy for me these days. I will try my best.

[@timurtihonov2859]

Your videos look stunning. What software do you use to make them?

[@QuestionSolutions]

Thank you very much! I use after effects for animations and illustrator for diagrams.

[@nonamelegit6503]

Will you be making any videos about Exergy? Thanks for the amazing videos

[@QuestionSolutions]

I'll add it to my list :) And thank you very much!

[@joshuacharlery5826]

I’m finally an engineer at the Best Aerospace & Defense Company in the World! Couldn’t do it without yah :)

[@QuestionSolutions]

Congratulations! Really happy to hear that and thank you for taking the time to write your comment. Makes me happy knowing some of these videos were helpful to you in some way. I wish you the absolute best with your future endeavors! :)

[@loyisongcobo6371]

what an inspiration you both are. how are you liking the job so far?

[@user-uy2zv7zq9c]

Please do a video on fluid mechanics

[@QuestionSolutions]

I have it on my list to do :)

[@user-ui6vz3zv8r]

May you please explain Rankine cycle and entropy i have a final :(((

[@QuestionSolutions]

I will do my best :)

[@nahommerk9493]

@ 7:30, don't you mean "work per second" instead of "power per second"...? Just pointing out. Other than that, thanks for the great video!

[@QuestionSolutions]

No, I mean power. So power is the rate of energy transferred during a specific time, with the units W for watts. 1 Watt = 1 J/s. Hope that helps 👍

[@Miftahul_786]

@@QuestionSolutions You said “power per second” which is what he is mentioning. It’s not “power per second” but “work per second” as you mentioned after