How Do Refrigerators and Heat Pumps Work? | Thermodynamics | (Solved Examples)

Learn how refrigerators and heat pumps work! We talk about enthalpy, mass flow, work input, and more. At the end, a few questions are solved step by step.
Extrapolate enthalpy: bit.ly/46EHhR1
🔹Internal Energy: • Ideal Gases - Specific...
🔹Energy transfer by mass: • Flow Work and Energy T...
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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 #airconditioner #heatpumps #refrigerator #enthalpy

[@RickC--oo2oz]

I don't understand why these vids don't have more views, its such a same to be honest. Great work

[@QuestionSolutions]

Thank you so much! I really appreciate it :)

[@burgundygiraffe726]

so glad to see you posting again, you really helped me understand relative motion analysis and im taking thermo-dynamics next semester so im sure ill be watching a lot more videos. Thank you so much for the help!

[@QuestionSolutions]

I am really glad to hear the videos helped you understand relative motion. Hopefully, the thermodynamics videos will help you out too. I've been really busy these days so I haven't been able to finish the next video, but hopefully soon, I can upload it :)

[@HANTRUONGPHUC]

Thank u so so much for those valuable videos. I really love this channel. You help me a lot in study. I dont have enough words to express my gratitude but this channel really deserves more people to know.

[@QuestionSolutions]

Thank you so much for your kind words! I am thrilled to hear that these videos have been helpful to you. Your support and feedback mean a lot. Keep learning and doing your best! 😊 Also, if you can, please consider sharing these videos with your classmates and friends, it could help them out too, and it will help the channel as well!

[@bonkgaming3646]

I just love your channel and the way you explain things, your channel has helped me a lot throughout my degree, i can't thank you enough bro

[@QuestionSolutions]

Thank you very much! I'm really happy to hear these videos helped you out with your degree. Makes me very happy!! Keep up the awesome work and I wish you the best with all your future endeavors.

[@deimonfighter]

Good videos! I am always waiting for new videos especially for Thermodynamics. Looking forward for Entropy videos 😇👀.

[@QuestionSolutions]

Thank you for your kind words! I’m thrilled to hear that you’re finding the videos helpful. I’m currently working on the Entropy videos and will upload them as soon as they’re ready. :)

[@engineeryarisowchannel8095]

you are amazing and I like your videos and the way you explain, you're the best teacher I have ever seen I'm appreciate you. if it possible I would like net time heat transfer, this subject I confused because it has a lot of proves and concepts those apply the example and I'm sure if do this it will be easier I hope you do soon. thank you again

[@QuestionSolutions]

Thank you very much, I really appreciate it. I will look into the chapter you mention, I am not sure if we cover that or not, but if we do, I will make a video on it. :)

[@engineeryarisowchannel8095]

​@QuestionSolutions ok thanks, teacher I will wait I.a .

[@natte431]

omg u deserve so much more

[@QuestionSolutions]

Thank you very much. If you can, please consider sharing these videos with your classmates and friends. It might help them out, and it will definitely help the channel. I would really appreciate it.

[@natte431]

@@QuestionSolutions i do we watch ur videos together and i SHARE ur playlist to my class and u never disappoint thank you

[@QuestionSolutions]

@@natte431 Thank you so very much! I truly appreciate it.

[@natte431]

@@QuestionSolutions I do hope u cover more subjects tho... I dont think i can benefit from them since i past it already but it can be useful for others

[@iamsad7714]

need video based on entropy

[@QuestionSolutions]

It's on my list to do :)

[@devinotero1798]

When do you think you would finish your thermo series? I start thermo soon

[@QuestionSolutions]

I am unsure. It depends on how much free time I have. So far, for a first year course, about 80% is covered in the playlist.

[@9_mo5yt70]

will you do about entropy?

[@QuestionSolutions]

Yes, I think so :)

[@9_mo5yt70]

@@QuestionSolutions when, no rush 🌚

[@QuestionSolutions]

I really hope soon, just been ridiculously busy these few months :(@@9_mo5yt70

[@EngSereneJibreen]

Do you have videos about Block Diagrams Models in control systems ?

[@QuestionSolutions]

Unfortunately, no.

[@yigitcan824]

I have a question here about at 4:30 what do _low temperature medium_ or _high temperature medium_ refer to here? I really appreciate it

[@QuestionSolutions]

A location, a place, a system, that has a relatively higher temperature than a location, place, or a system that has a lower temperature. So it could be a room, the space inside a fridge, etc.

[@yigitcan824]

@@QuestionSolutions One more thing, _refrigerators and heat-pumps_ also operate in a cycle ,right? I mean There's no change from initial to final, so that in our energy balance equation is zero?

[@QuestionSolutions]

Yes, they do work in cycles, but what do you mean by "so that in our energy balance equation is zero"? @@yigitcan824

[@yigitcan824]

@@QuestionSolutions I meant the right side of our equation, energy change

[@AhmedHassan-tz1me]

When do you plan to upload lectures for the remaining topics of thermodynamics?

[@QuestionSolutions]

Whenever I can finish and get them done :)

[@AhmedHassan-tz1me]

Thank you for your reply! I am taking this course now and I really found your videos helpful so will it be possible for you to get them done in a month? like chapter 6 and 7

[@QuestionSolutions]

@@AhmedHassan-tz1me chapter 6, yes, I think it's just the Carnot cycle left for that chapter. I'll try my best to get chapter 7 done as well. No guarantees, but I'll try my hardest. :)

[@qudhachure9598]

would you be able to make videos fluid dynamics or in the near future.

[@QuestionSolutions]

Thank you for your suggestion! So it's on my to-do list but I really don't know when I would get around to it. I think there might be a lot of videos on the subject on KZbin as well. So hopefully, they will be helpful to you :)

[@user-ui6vz3zv8r]

in 7:44 how do i know if the given is Qh or Ql its confusing

[@QuestionSolutions]

So whenever heat is rejected ("thrown away into the environment") into the environment, it's QH, and whenever heat is taken "away" from some space, like your freezer, that amount of heat is QL.

[@bumxrr]

I dont know if this is a correct way but cant i see the higher number and consider it as QH and the opposite for QL?@@QuestionSolutions

[@nacure360]

did yo voice change

[@QuestionSolutions]

From when I started the channel to now? Yes, it sure did. 😅Also, I got a new mic too.

[@nacure360]

@@QuestionSolutions From video to 22 to 23 (this one) it just sounds so different 😂

[@QuestionSolutions]

@@nacure360 Oh, I think I know why. I believe this was around the time I switched where I record from. 😅