Elon Musk said post secondary is basically useless because you can learn almost anything on the internet, all the information is there. I agree with him. Post secondary is more of a life experience then it is a learning experience. Obviously you'll learn but it's not necessary. I start college in a couple months and I'm positive I'll learn more coming home and researching. 🤦♂️
@@topg893 You'll be right lol. You will receive a very high standard of education. This video speaks about what happens in each component. Beyond secondary you will be able to quantifiably express down to the energy of each molecule what is happening in each of these components. Im studying thermodynamics right now and this video provided some interesting background.
Wow! As a 9 month tradesman making a career jump, this was the MOST simplistic description of the ref cycle. Pressure increaser, heat rejector, pressure dropper, heat collector. I love it!
I'm a mechanical engineer and your presentation is so logical and well-thought out, it's a blessing for me as well. Not just for technicians, to be honest
Question for you since you're a mechanical engineer. What is the physical reason the refrigerant is heating up when it compresses? And why does it cool when it expands? Would be nice to have a discussion on this. tia
@@mattstringfellow9353 thanks for the response! Type of discussions i look forward to. I am definitely going for the "physical reasons" why it occurs as you mentioned. Particularly getting into those "complicated reasons". Here are some things to consider: given that temperature is the kinetic energy of molecules, say if the molecules were on one side of a room divided by a wall. Now that wall magically and instantly disappears...then the volume has increased and pressure decreased. What is to cause the temperature (which is the kinetic energy of the molecules) to decrease? In other words, what causes the molecules to slow down. (There is an answer but for sake of provoking deeper thought Ill leave the question as it is). I believe the physical phenomenon can be explained simply. What I believe to be the case is that people don't understand the full reason. At least I havent found one on RUclips yet
@@mattstringfellow9353 have you considered what I mentioned yet? The critical part of the explanation that I see is missing in almost all YouTubr vids is where you went from "squeeze the room to half it's volume...now you have twice as many particles bumping into each other" to "they will all speed up". There is a jump in the logic here. Just because the particles occupy a smaller space, there isnt a reason for their speeds to increase. When this HVAC guy says "because there is an increase in pressure, there is an increase in temperature"...he does not actually give the explanation why.
This is a great video just what I needed I just recently started hvac schooling at AAI arizona and felt like I didn't under stand every thing like I could of then I found this video on you tube took notes as I was watching it I paused it rewind it a dozen times it took me about hour to watch this term min video but now I feel like I actually understand now thank you for explaining o it the way you did appreciate you much thanks
I'm a middle school technology teacher(shop) , I think I missed my calling-HVAC. I just installed a four zone mini split myself and a one zone. I find this type of work very fascinating in that you use a variety of skills. A lot of students would be much better off going into a trade like this than college. Unfortunately college as been pushed for a long time as the answer for success but that is slowly changing. Thanks for the lesson.
I am also a trainer in HVAC sir. your video helps a lot specially we are on online training now because of the pandemic. you are such an inspiration for me as a trainer here in the Philippines because they require us to do also videos in teaching students online. your knowledge is awesome about HVAC and i picked a lot of information to also share to my students. God bless you more sir :)
As someone with no background in this field I found myself researching almost every word to its scientific definition just to understand the concept. Thank you for the clear and concise content.
The reason he transfers is part of the second law of thermodynamics which is anything that is hot will share its heat with whatever is cold the evaporator in your house is cold and the Air in your house moving across the evaporator gets absorbed into that cold refrigerant the same thing happens outside the condenser is hotter than the outside air, so it transfers the heat into the outside air. Again the second law of thermodynamics is whatever is hot will share its heat with whatever is cold. on 100° day the refrigerant coming out of the compressor will be 215° and the heat will get transferred into the 100° air outside.
and this is only a 10 minute video. I'm starting college in September and I already know that they're going to make things more complicated. People think being smart is making easy things complicated but it's making complicated things easy.
😮how in the world did I not find this channel right away. Stupid algorithym must hate my profile. Took me a week to know basic concept, when your instructions specifically made me understand in less than 10 minutes. Shout out to my classmate, John Luna, for sharing this channel. Awesome channel, definitely a subscriber now.
Also, just to be understood, we all learn differently, I have very little experience with HVAC and its theories and is taking me a long time to understand technical readings and schematics. Since the amount of information absorbed from this RUclips lecture I find it easier now. Great straight to the point explanation and visuals. Quite a spoon-feeding example. For many tradesman, this type of lecture is more ideal. For studious type, spoon-feeding may not be ideal. I am not the white collar type, and this lecture is spot on straight. Loved it..!
I’ve been in the trade for a while now and refrigerant cycle is very simple in fact is as simple as this guy describes it. Now if you get really technical there is a lot more to it but in principle is simple. To many teachers out there acting all smart are scaring youngsters away make it sound like rocket science. Truth is half the techs “fixing” ac’s out there have no idea how refrigerant works and that’s the teachers fault for not keeping it simple. Thank you for the excellent video sir.
This should be a required statement at the beginning of classes. Our first week in and we lost 4 students because the instructor made it sound complicated.
I work for a HVAC company and im now doing Residential. This will help a ton when explaining to customers as well as understanding how Refrigeration/Acs work
ive come to this video a lot these past few years and learn something new every time, you are by far the best hvac teacher ive ever seen, you teach more than my hvac program does i go to you to pass test instead of the content they teach.
Doing my last week of schooling to get my plumbing ticket and we have a small section on refrigeration. Was taking notes during the video. Super helpful and to the point. Thank you!
Appreciate video. I’m going to school in the Fall and wanted to get some basics beforehand. I’ll check out some of your other videos. I’m 45 y/o and I’m hoping for the best.
Thank you so much ! I'm a newbie at hvac and am barely starting classes about 3 weeks ago but this definitely helps me get a real good picture and understanding thank you !
Thank you soooo much!! I've seen many videos but yours goes into depth of the process and stays simple! Finally a year and half of college makes sense! I'm so happy to finally understand what's going on!! 🙂🙂🙂🙂
Wow, for real, I have been having a hard time grasping the cycle of refrigerant despite watching and read things over time and only getting pieces. Your explanation is EXCELLENT, and finally makes it make sense! ❤ Thank you for the great explanation. I saw you on SkillCat.
Brian is a great teacher and I'm sure being a student in his school is the beginning of a new and exciting life. Pay attention to details. There is alot of info when this guy speaks. People pay you for what you know.
Thanks a lot, i'm making a switch from electronics to refrigiration but couldn't understand my instructor because he was explaining in Turkish. You saved me a lot of work.
I'm not even going to HVAC school but I'm having my evaporator coil replaced tomorrow and I wanted to see the process of an AC unit. I understand now!!
This guy is great. I'm not going into HVAC necessarily but industrial mechanics as a whole and I've watched this video multiple times as refresher. Taking my NIUPLE exam tomorrow. Wish me luck.
The details are what make Brian great at teaching. Clearly has a passion for teaching his students all they need to know. I hope they focus on getting this stuff
Good Day ! After being in the heating and air conditioning field for 40 years I still watch the little reminder class's because every now and then I will relearn a good topic.. This video is a good starting point or reminder point. Thanks
Wonderful video. I have learned more bullet points from this than I have learned from the paid site I used to study for the EPA 608 test. Bravo! Thanks so much.
I feel a lot more confident going to this interview next Tuesday. I thought I had a general understanding of the circuit but this was the simplest for my brain to digest. Good stuff amigo. Cheers.
I've been really struggling with keeping the components straight in my head even though I can work on a system in meat space fairly well, using the terms of "Heat Rejector/Absorber" and "Pressure Increaser/Decreaser" was so stupidly straightforward i face palmed for not picking it up so intuitively. Thanks a bunch!
I am going to this school trying to get my certificate in HVAC I feel like they just scamm me all this 8 months I am paying 20k and really feel like they are all about money ....😥😓 Great info and you also keep it simple
I just bought my first house. It doesn't have central A/C, instead it has a whole house fan/attic fan. So I bought some window units. But before I bought them, I wanted to learn more about BTUs and what size window unit I needed and anyway long story short, ended up here learning about the A/C cycle and I am absolutely fascinated. The fact we use the changing of a liquid to a gas and a gas to a liquid as a means of cooling is just the absolutely craziest and awesome thing to me.
As a retired AC tech with a AS degree in air conditioning and 40 years of work experience I have to say you did a really good job of explaining the refrigeration cycle. You would be surprised how many people explain it wrong or don't clearly understand an refrigeration cycle. My way of explaining it is by manipulating the pressures and temperatures of a refrigerant you force the refrigerant to either condense or evaporate therefore either releasing or absorbing heat. This is how you can transfer heat from one area to another by way of the refrigerant. Your explanation was much more thorough.
@@Howie875 i may be pedantic and myopic on your explanation and perhaps for sake of simplicity you explained it that way. The inaccuracy is when you say "force the refrigerant to either condense or evaporate therefore releasing or absorbing heat". That is not the correct reasoning if you mean that because the refrigerant condenses or evaporates does it absorb or release heat. The state change does not matter. You can still get a refrigeration cycle without a state change. It is not a state change that matter, it's pressurizing a refrigerant so that a temperature difference is created between the ambient temperature wherein it allows you to move heat.
@@Howie875 If too long or not clear...it's not that because the refrigerant condenses/evaporates that allows heat to be moved. It's more that because the refrigerant had its pressure changed and heat (not temperature) removed/added, does the refrigerant condense/evaporate. It just so happens that the property of the refrigerant has a low boiling point. And it also just so happens that matter changing states stays the same temperature but requires the addition of energy (ie Heat). And that's why things like R22 refrigerant is good because we are able to add heat to it without changing the temperature. "We are leveraging the refrigerant's phase change" (a pressure-enthalpy chart shows this) as mentioned in the vid. Say if we were in a different environment where 100C is cold, then we'd be using water as a refrigerant. and btw, not knowing the thermodynamics and physics behind HVACs isn't necessary to be a good HVAC tech. I doubt many engineers even understand the cycle correctly. I certainly know some engineers with masters and doctorates who don't even know extremely basic things. Had one EE phd friend who tried to jump his car...it was driving and then it stopped...he had run out of fuel.
@@felixchien1664 I think you are a little confused. The evaporation and condensation of the refrigerant has everything to do with it. Very large amounts of heat are absorbed and released during a change of state. Heat is absorbed when a liquid refrigerant evaporates and is released when the refrigerant gas condenses to a liquid. Let's go over a refrigeration cycle starting at the suction line entering the compressor. Low temperature, low pressure gas enters the compressor and is pressurized to a high temperature, high pressure gas. Air traveling over the condenser coil cools the refrigerant below its condensing pressure which forces the refrigerant gas to condense into a medium temperature, high pressure liquid. This releases a considerable amount of heat, heat that was absorbed from the conditioned space. Next the liquid refrigerant goes thru a metering device, typically a TXV. This is basically a restrictor which induces a large pressure drop. This drop in pressure forces the refrigerant to evaporate (and the evaporator coil temperature is above the boiling temperature of the refrigerant at this pressure) and therefor it absorbs heat from the conditioned space. We are left now with a low temperature, low pressure gas which now once again enters the compressor. It's all about manipulating refrigerant to condense and evaporate, (change of state) by manipulating temperatures and pressures, forcing it to absorb and release heat, thereby allowing us to move heat from one area (inside) to another area(outside) by way of the refrigerant,
I am going to be starting school for HVAC at MTTI... Due to covid 19 everything is a disaster, so I may have to start late :/ However in the time being I am using the vids to get a head start, and learn the basics. So far I like it they are informative, and breaks it down step by step.
I have watched a lot of The Engineering Mindset videos on HVAC which have helped develop a basic understanding of the systems. Watching these videos is helping me to truly understand the concepts. Thank you so much for these videos!!
Thank You for posting! I’m great at troubleshooting but not so great on theory’s. I’m more “hands on” than book knowledge. I’ve studied refrigeration years ago at a vocational/ technical school many years ago but trying to get back into it at my workplace. Looking forward to watching more of your videos! Thanks for keeping it simple!
This was absolutely fantastic. There is a lot of confusing information about how the A/C system works. I thought the system worked the opposite of how you just explained it. Thank you, thank you.
Great crash course that makes me instantly feel like I have a firmer grasp on this stuff. I'm an instrumentation guy that's making the jump to a maintenance manager (includes HVAC techs), so I am looking to learn up a little bit on the process.
Thanks for the explanation, I practice mechanics applied to different fields, I do work some in the ac car systems and I have read a lot about HVAC. Your explanation is great and your pronunciation is just perfect, you speak very good English, I could understand all you said.
By watching this video which is full of content..... really impressed I am your student now Need to learn more all from basic to next level. Appreciate
What an incredible video - and so clearly explained! Doing an Engineering degree and this has just explained EVERYTHING I need to know regarding this subject - it should be used by Universities everywhere for explaining the refrigeration cycle and Khan Academy should book you too. Now, please do a vid on Calculus :-)
Thank you very much sir. My HVAC class has moved online due to the quarantine & stuff and we happen to be watching some of your videos. Not only do I have great instructors, but also great informative videos to watch in the mean time. :)
Very interesting way to describe the main system components. I was forces to remember them by actual name and function but I see the advantage for initial system introduction. Well done!
Great Content Sir. I can't thank you enough, I'll just subscribe and like your contents. I am starting a career as a Facility Engineer and your deep explanation of HVAC Systems in this video among other contents helps me a lot. Kudos.
Straight to the point. Not a waste of time at all...will have to watch again and take notes lol
Elon Musk said post secondary is basically useless because you can learn almost anything on the internet, all the information is there. I agree with him. Post secondary is more of a life experience then it is a learning experience. Obviously you'll learn but it's not necessary. I start college in a couple months and I'm positive I'll learn more coming home and researching. 🤦♂️
How do I remove air from the compressor line
@@vickispeakman4300 you'd need to evacuate all the refrigerant then pull a vacuum to about 500 microns, then add the proper amount back in.
@@vickispeakman4300 get a hose and let all the freon out into the sky then fill it back up
@@topg893 You'll be right lol. You will receive a very high standard of education. This video speaks about what happens in each component. Beyond secondary you will be able to quantifiably express down to the energy of each molecule what is happening in each of these components. Im studying thermodynamics right now and this video provided some interesting background.
Wow! As a 9 month tradesman making a career jump, this was the MOST simplistic description of the ref cycle. Pressure increaser, heat rejector, pressure dropper, heat collector. I love it!
How much is your pay🤷♂️
Bro same ! 😂
Qq
I'm a mechanical engineer and your presentation is so logical and well-thought out, it's a blessing for me as well. Not just for technicians, to be honest
Question for you since you're a mechanical engineer. What is the physical reason the refrigerant is heating up when it compresses? And why does it cool when it expands? Would be nice to have a discussion on this. tia
@@mattstringfellow9353 thanks for the response! Type of discussions i look forward to. I am definitely going for the "physical reasons" why it occurs as you mentioned. Particularly getting into those "complicated reasons".
Here are some things to consider: given that temperature is the kinetic energy of molecules, say if the molecules were on one side of a room divided by a wall. Now that wall magically and instantly disappears...then the volume has increased and pressure decreased. What is to cause the temperature (which is the kinetic energy of the molecules) to decrease? In other words, what causes the molecules to slow down. (There is an answer but for sake of provoking deeper thought Ill leave the question as it is).
I believe the physical phenomenon can be explained simply. What I believe to be the case is that people don't understand the full reason. At least I havent found one on RUclips yet
@@mattstringfellow9353 bunch of typos in my first comment. I'll look at statistical mechanics. thanks again for the info
@@mattstringfellow9353 have you considered what I mentioned yet?
The critical part of the explanation that I see is missing in almost all YouTubr vids is where you went from "squeeze the room to half it's volume...now you have twice as many particles bumping into each other" to "they will all speed up".
There is a jump in the logic here. Just because the particles occupy a smaller space, there isnt a reason for their speeds to increase. When this HVAC guy says "because there is an increase in pressure, there is an increase in temperature"...he does not actually give the explanation why.
Thanks a ton. In 10 minutes I understood more than a month of R &D on the internet. A wonderful wonderful teacher. Really appreciate it
Glad it was helpful!
@@HVACSGreat video sir! Just a quick question, is the refrigerant hot in the outdoor unit and cold in the indoor unit?
This is a great video just what I needed I just recently started hvac schooling at AAI arizona and felt like I didn't under stand every thing like I could of then I found this video on you tube took notes as I was watching it I paused it rewind it a dozen times it took me about hour to watch this term min video but now I feel like I actually understand now thank you for explaining o it the way you did appreciate you much thanks
Thank you, I am just telling you I have read BOOKS and watched several RUclips videos and you are the only one that transferring the idea. THANK YOU.
I'm a middle school technology teacher(shop) , I think I missed my calling-HVAC. I just installed a four zone mini split myself and a one zone. I find this type of work very fascinating in that you use a variety of skills. A lot of students would be much better off going into a trade like this than college. Unfortunately college as been pushed for a long time as the answer for success but that is slowly changing. Thanks for the lesson.
With the tuition rates being charged at most colleges these days, I think this change is coming more rapidly.
I finally understand how HVAC systems work! Thanks for this
Very smart. Congratulations for this level of explanation, it's rarely seen! Thank you for it, it was a pleasure!
I am also a trainer in HVAC sir. your video helps a lot specially we are on online training now because of the pandemic. you are such an inspiration for me as a trainer here in the Philippines because they require us to do also videos in teaching students online. your knowledge is awesome about HVAC and i picked a lot of information to also share to my students. God bless you more sir :)
As someone with no background in this field I found myself researching almost every word to its scientific definition just to understand the concept. Thank you for the clear and concise content.
The reason he transfers is part of the second law of thermodynamics which is anything that is hot will share its heat with whatever is cold the evaporator in your house is cold and the Air in your house moving across the evaporator gets absorbed into that cold refrigerant the same thing happens outside the condenser is hotter than the outside air, so it transfers the heat into the outside air. Again the second law of thermodynamics is whatever is hot will share its heat with whatever is cold. on 100° day the refrigerant coming out of the compressor will be 215° and the heat will get transferred into the 100° air outside.
Going to HVAC training at ForgeNow Academy next month. Thanks for this quick crashcourse!
Ac service tech channel will teach you more than them usually.
90% problems are electrical
I'm a hvac mechanic and this is the video I send to someone who wanna know how refrigeration system work! Great explanation
I would fire all the lecturers at technical colleges and play your videos in all HVAC schools and not waste student’s time
and this is only a 10 minute video. I'm starting college in September and I already know that they're going to make things more complicated. People think being smart is making easy things complicated but it's making complicated things easy.
Warm Poo couldn’t agree more
Trust me I’m in a college this was a whole 2 hour lecture for all the info he said in this 10 mins
OK. I wonder if you'll still feel that way after you look at a pressure-enthalpy chart.
So you would rather watch videos, than be taught by someone who’s been there and done it? I don’t see the logic in that…
😮how in the world did I not find this channel right away. Stupid algorithym must hate my profile. Took me a week to know basic concept, when your instructions specifically made me understand in less than 10 minutes. Shout out to my classmate, John Luna, for sharing this channel.
Awesome channel, definitely a subscriber now.
Also, just to be understood, we all learn differently, I have very little experience with HVAC and its theories and is taking me a long time to understand technical readings and schematics. Since the amount of information absorbed from this RUclips lecture I find it easier now. Great straight to the point explanation and visuals. Quite a spoon-feeding example. For many tradesman, this type of lecture is more ideal. For studious type, spoon-feeding may not be ideal. I am not the white collar type, and this lecture is spot on straight. Loved it..!
I’ve been in the trade for a while now and refrigerant cycle is very simple in fact is as simple as this guy describes it. Now if you get really technical there is a lot more to it but in principle is simple. To many teachers out there acting all smart are scaring youngsters away make it sound like rocket science. Truth is half the techs “fixing” ac’s out there have no idea how refrigerant works and that’s the teachers fault for not keeping it simple. Thank you for the excellent video sir.
This should be a required statement at the beginning of classes. Our first week in and we lost 4 students because the instructor made it sound complicated.
I’ve never heard a more comprehensive explanation of the refrigeration cycle explained in the most understandable language, thank you!
I work for a HVAC company and im now doing Residential. This will help a ton when explaining to customers as well as understanding how Refrigeration/Acs work
ive come to this video a lot these past few years and learn something new every time, you are by far the best hvac teacher ive ever seen, you teach more than my hvac program does i go to you to pass test instead of the content they teach.
BRIAN THANK YOU FOR THESE VIDEOS I GRADUATED FROM TWO TRADE SCHOOLS WISH YOU BEST IN THE NEW YEARS &LOOKING FORWARD TO MORE VIDEOS!
Just started going to school for HVAC/R with zero prior knowledge and your videos are a big help. Thank you sir!
This was super helpful! Thank you so much for the explanation :)
Animator Matt. Good stuff
I promise to study hard to be a hvac technician because I’m tired of working at chipotle!!!!!!!!!!!
One of the most straightforward and best described video that I’ve ever seen, god bless you
Thanks!
Doing my last week of schooling to get my plumbing ticket and we have a small section on refrigeration. Was taking notes during the video. Super helpful and to the point. Thank you!
Thank you for sharing your knowledge! It took me a while to find someone who can really articulate the cycle in a very simple manner 👍
Appreciate video. I’m going to school in the Fall and wanted to get some basics beforehand. I’ll check out some of your other videos. I’m 45 y/o and I’m hoping for the best.
this might've been the best explanation of the refrigeration cycle I've seen so far, thank you
Thank you so much ! I'm a newbie at hvac and am barely starting classes about 3 weeks ago but this definitely helps me get a real good picture and understanding thank you !
How are you doing now? Did you finish? Salary? Enjoyment?
I’ve been taking Ac and refrigeration class fir the past 4 months. The way you explained in 10 minutes made up what I didn’t understand for 4 months
Thank you soooo much!!
I've seen many videos but yours goes into depth of the process and stays simple!
Finally a year and half of college makes sense! I'm so happy to finally understand what's going on!! 🙂🙂🙂🙂
Wow, for real, I have been having a hard time grasping the cycle of refrigerant despite watching and read things over time and only getting pieces. Your explanation is EXCELLENT, and finally makes it make sense! ❤ Thank you for the great explanation. I saw you on SkillCat.
Brian is a great teacher and I'm sure being a student in his school is the beginning of a new and exciting life. Pay attention to details. There is alot of info when this guy speaks. People pay you for what you know.
Thanks a lot, i'm making a switch from electronics to refrigiration but couldn't understand my instructor because he was explaining in Turkish. You saved me a lot of work.
Great content. I now have a basic understanding of what an AC system actually does. Thanks so much for your expert illustration.
I'm not even going to HVAC school but I'm having my evaporator coil replaced tomorrow and I wanted to see the process of an AC unit. I understand now!!
This guy is great. I'm not going into HVAC necessarily but industrial mechanics as a whole and I've watched this video multiple times as refresher. Taking my NIUPLE exam tomorrow. Wish me luck.
The details are what make Brian great at teaching. Clearly has a passion for teaching his students all they need to know. I hope they focus on getting this stuff
Good Day ! After being in the heating and air conditioning field for 40 years I still watch the little reminder class's because every now and then I will relearn a good topic.. This video is a good starting point or reminder point. Thanks
The most STRAIGHT FORWARD ANSWER I've been looking for!! Thank you so much!!!
An excellent "boiled down" explanation that is EXTREMELY helpful in understanding the cycle. Thanks!
Yeh I agree. I'm a heating engineer just looking to branch out into HVAC and this video was very informative.
You explained better in a half hour than my instructor in 5 months.
No kidding same here
Wonderful video. I have learned more bullet points from this than I have learned from the paid site I used to study for the EPA 608 test. Bravo! Thanks so much.
I feel a lot more confident going to this interview next Tuesday. I thought I had a general understanding of the circuit but this was the simplest for my brain to digest. Good stuff amigo. Cheers.
Just started HVAC School . Thank you for making this video helped a lot.
It took couple of weeks in my school to explain this simple thing!
Now I know how it works. Thank you.
Great vid, btw not sure if it helped any one else but the hand gestures really helped.
Amazing video, very informative…simplified for your pleasure. May you live long and happy!!!
Very informative. Makes sense now. Explained in a simple way. A way a novice tech can understand.
Thank you guys for these episodes, there is much more informations each time.
I've been really struggling with keeping the components straight in my head even though I can work on a system in meat space fairly well, using the terms of "Heat Rejector/Absorber" and "Pressure Increaser/Decreaser" was so stupidly straightforward i face palmed for not picking it up so intuitively. Thanks a bunch!
Best video I have ever seen on basic system breakdown.
I am going to this school trying to get my certificate in HVAC I feel like they just scamm me all this 8 months
I am paying 20k and really feel like they are all about money ....😥😓
Great info and you also keep it simple
Dude, the best way to go about getting your certification is getting on with a company that will PAY for the school.
I know how you feel, my school was such a joke. It makes me upset that there are alot of technical schools out there that run these schemes. 😡😡
20k😮
Im start in december and its 300$! Good school in quebec! In refregeration ! Im stoked to start
Thank you so much ! This is the simplest and most logical explanation on the internet, I completley understood from beginning to end
Thank you for that knowledge! Keep on posting and posting , I love watching you’re videos man I learn something every time.! Love from Houston TX
Thanks for taking the time to brake down the systems and teaching us how each one operates.
I just bought my first house. It doesn't have central A/C, instead it has a whole house fan/attic fan. So I bought some window units. But before I bought them, I wanted to learn more about BTUs and what size window unit I needed and anyway long story short, ended up here learning about the A/C cycle and I am absolutely fascinated. The fact we use the changing of a liquid to a gas and a gas to a liquid as a means of cooling is just the absolutely craziest and awesome thing to me.
As a retired AC tech with a AS degree in air conditioning and 40 years of work experience I have to say you did a really good job of explaining the refrigeration cycle. You would be surprised how many people explain it wrong or don't clearly understand an refrigeration cycle. My way of explaining it is by manipulating the pressures and temperatures of a refrigerant you force the refrigerant to either condense or evaporate therefore either releasing or absorbing heat. This is how you can transfer heat from one area to another by way of the refrigerant. Your explanation was much more thorough.
Hmm, i dont think you were entirely accurate either
@@felixchien1664 Hi Felix. Everybody is welcome to their own opinion. Just out of curiosity, what do you think is inaccurate about my statement ?
@@Howie875 i may be pedantic and myopic on your explanation and perhaps for sake of simplicity you explained it that way. The inaccuracy is when you say "force the refrigerant to either condense or evaporate therefore releasing or absorbing heat".
That is not the correct reasoning if you mean that because the refrigerant condenses or evaporates does it absorb or release heat. The state change does not matter. You can still get a refrigeration cycle without a state change. It is not a state change that matter, it's pressurizing a refrigerant so that a temperature difference is created between the ambient temperature wherein it allows you to move heat.
@@Howie875 If too long or not clear...it's not that because the refrigerant condenses/evaporates that allows heat to be moved. It's more that because the refrigerant had its pressure changed and heat (not temperature) removed/added, does the refrigerant condense/evaporate. It just so happens that the property of the refrigerant has a low boiling point. And it also just so happens that matter changing states stays the same temperature but requires the addition of energy (ie Heat). And that's why things like R22 refrigerant is good because we are able to add heat to it without changing the temperature. "We are leveraging the refrigerant's phase change" (a pressure-enthalpy chart shows this) as mentioned in the vid.
Say if we were in a different environment where 100C is cold, then we'd be using water as a refrigerant. and btw, not knowing the thermodynamics and physics behind HVACs isn't necessary to be a good HVAC tech. I doubt many engineers even understand the cycle correctly. I certainly know some engineers with masters and doctorates who don't even know extremely basic things. Had one EE phd friend who tried to jump his car...it was driving and then it stopped...he had run out of fuel.
@@felixchien1664 I think you are a little confused. The evaporation and condensation of the refrigerant has everything to do with it. Very large amounts of heat are absorbed and released during a change of state. Heat is absorbed when a liquid refrigerant evaporates and is released when the refrigerant gas condenses to a liquid. Let's go over a refrigeration cycle starting at the suction line entering the compressor. Low temperature, low pressure gas enters the compressor and is pressurized to a high temperature, high pressure gas. Air traveling over the condenser coil cools the refrigerant below its condensing pressure which forces the refrigerant gas to condense into a medium temperature, high pressure liquid. This releases a considerable amount of heat, heat that was absorbed from the conditioned space. Next the liquid refrigerant goes thru a metering device, typically a TXV. This is basically a restrictor which induces a large pressure drop. This drop in pressure forces the refrigerant to evaporate (and the evaporator coil temperature is above the boiling temperature of the refrigerant at this pressure) and therefor it absorbs heat from the conditioned space. We are left now with a low temperature, low pressure gas which now once again enters the compressor. It's all about manipulating refrigerant to condense and evaporate, (change of state) by manipulating temperatures and pressures, forcing it to absorb and release heat, thereby allowing us to move heat from one area (inside) to another area(outside) by way of the refrigerant,
I am going to be starting school for HVAC at MTTI... Due to covid 19 everything is a disaster, so I may have to start late :/
However in the time being I am using the vids to get a head start, and learn the basics. So far I like it they are informative, and breaks it down step by step.
You rock Brian, the very best explanation i heard so how as to how a HVAC system operates. Keep up the good work Sir.
Thank you very much. this video helps me so much. I just began new job in HVAC industry.
I have watched a lot of The Engineering Mindset videos on HVAC which have helped develop a basic understanding of the systems. Watching these videos is helping me to truly understand the concepts. Thank you so much for these videos!!
These videos are career builders. Thank you brother i am grateful.
im currently in uei college for HVAC im now in refrigerant module and this helped me understand it way more thanks!
Excellent and straight-forward lesson that is presented in a respectful manner. Thanks!
3 days of class summed up in one video. Lol thanks
Thank You for posting! I’m great at troubleshooting but not so great on theory’s. I’m more “hands on” than book knowledge. I’ve studied refrigeration years ago at a vocational/ technical school many years ago but trying to get back into it at my workplace. Looking forward to watching more of your videos! Thanks for keeping it simple!
This was absolutely fantastic. There is a lot of confusing information about how the A/C system works. I thought the system worked the opposite of how you just explained it. Thank you, thank you.
I am extremely thankful for the knowledge. Thank you.
Starting my apprenticeship in January, couldn't be more excited 🍻
I am a refrigeration apprentice and this has massively helped thank you so much
Great crash course that makes me instantly feel like I have a firmer grasp on this stuff. I'm an instrumentation guy that's making the jump to a maintenance manager (includes HVAC techs), so I am looking to learn up a little bit on the process.
Welcome gues
Thanks for the explanation, I practice mechanics applied to different fields, I do work some in the ac car systems and I have read a lot about HVAC. Your explanation is great and your pronunciation is just perfect, you speak very good English, I could understand all you said.
By watching this video which is full of content..... really impressed
I am your student now
Need to learn more all from basic to next level.
Appreciate
Very comprehensive explanation. Helped me a lot.
Great way to explain it . I am going to watch this again. Straight to the point outstanding.
Awesome video man, you taught me a lot. What I would like to see in the video is where the load or the air outages to a home.
Clear and concise. Thank you!
This is a great educational tool and video. Thank you
This is fantastic. Best explanation I've come across. Thank you
Thank you B. My boss told me today I needed to go back to basics. Otherwise I was just filter changer
What an incredible video - and so clearly explained! Doing an Engineering degree and this has just explained EVERYTHING I need to know regarding this subject - it should be used by Universities everywhere for explaining the refrigeration cycle and Khan Academy should book you too. Now, please do a vid on Calculus :-)
So impressed I've subscribed!
This was helpful. This is my first week in HVAC school
Thank you very much sir. My HVAC class has moved online due to the quarantine & stuff and we happen to be watching some of your videos. Not only do I have great instructors, but also great informative videos to watch in the mean time. :)
You’re awesome thanks! 2 years into the trade, lots to learn!
Fantastic !! Top shelf education... has filled in all of the holes un my comprehension.... very many thanks :)
this is one of the best videos ever why cant everyone teach this way , dawood is so right ,
thanks
This is fantastic! I will fail my midterm this evening by much less thanks to watching this vuddeo.
Thank you so much for this lesson, it helped me a lot brother, May GOD Bless you.
I love the way you explain things! 😘
Thank you! 😊
Outstanding teaching technique my friend. Thank you
Very interesting way to describe the main system components. I was forces to remember them by actual name and function but I see the advantage for initial system introduction. Well done!
You are an awesome instructor!!!
This is really cool, Sir. You took your time explaining jargons and made understanding really easier for newcomers like me. Thank you.
Please keep uploading videos with this level of explanation detail. Good job btw. I have it a thumbs up 👍
Just suscribed because of you teaching heart ..
Keep it like this as cool and as simple , so dummies like me can understand. .
Great work!!!
Just had an interview and they asked me to explain the refrigeration cycle. Wish i had watched some sort of refresher beforehand..
Great Content Sir. I can't thank you enough, I'll just subscribe and like your contents. I am starting a career as a Facility Engineer and your deep explanation of HVAC Systems in this video among other contents helps me a lot. Kudos.
Thank you very concise and informative for laymen!!!