So, I’ve looked at about four different videos trying to figure out how refrigerants work and they have all left me with more questions than answers. Your video was actually the first one where I felt like I totally understood what a refrigerant is. Thanks a lot mate!!
Watched four different videos on this subject and all left me scratching my head. Then I watched this video with the same exact terminology and theory but explained completely different than the others and it made perfect sense. Goes to show why good teachers are important. You can have a bunch of teachers teaching on the same subject matter but one makes sense and the others don’t. The way you are being taught is just as important as what your being taught. Great Job!!
Phenomenal explanation! You just helped me turn months of confusion, uncertainty and anxiety into understanding. I realize that the information I was being taught was indeed correct, but somehow since I am not working in the field, I was unable to connect the dots to understand as I do now. Thank You very much!
Always had some trouble understanding the concept of refrigeration. This video gave a thorough explanation with step by step process of the entire cycle. The numbered illustration which was animated provided me a clear understanding of the refrigeration process. For someone who sometimes struggled in school, this was a godsend. Thanks very much.
thank you so much you cleared my some doubt in this video, pls sir its my request u will make some video about static pressure in HVAC and how they calculated
Pssst. Guess what? This channel is uploading thousands of dollars worth of easily digestible knowledge. 😂 it’s insane how good this channel is and that fact it’s free makes me laugh. I still paid for trade school but still this is literally the place to learn. I back up all my learning with this channel.
@@VenomSkywalker. refrigerant is just the stuff inside the lines that causes the fridge to get cold. Same thing as an air conditioner just slightly different for lower temps
This was a nice explaination EXCEPT for two major issues. 1. The refrigerant in State-1 is a superheated vapor and is NOT in its saturation state! If it was, this would pose a problem to the compressor which is a "vapor" pump. It can not and does not want to see any liquid! 2. Inversly, in State-2, at the output of the condenser, the refrigerant is in a high temperature-high pressure sub-cooled liquid. The refrigerant needs to be 100% sub-cooled liquid when entering the evaporator. This is where you want all of the absorbing of heat going on, not in the liquid line.
The emf generated by the external energy , separates charge carrier (electron) from the atom of copper coil in generator similarly the energy breaks the atom of refregerent to make it vapor and hence the liquid becomes somewhat cooler. Thanks from BD.
Thank you so much. Yours is an excellent description of the processes and the sciences behind each stage by explaining it with familiar examples like boiling water and spray can.
It's worth mentioning that the vapor entering the compressor is superheated, and the liquid entering the TEV is sub-cooled. Remember folks condensers reject latent heat and evaporators absorb latent heat.
Temperature and pressure are related. The saturation temperature of a substance is the temp at which it will change state from a vapor to a liquid or vice versa. The saturation temp depends on pressure. The high temp high pressure liquid refrigerant passes through the metering device. The metering device and compressor creates a pressure differential. So when the refrigerant passes through the metering device its pressure and temperature drops. So now the refrigerant temperature and saturation temperature is lower than the temperature in the space we are trying to cool. Heat moves from hot to cold so when air is passed through the evaporator coil it the refrigerant absorbs heat from the air. The refrigerant will remain as a liquid until it has absorbed enough heat to evaporate. The state change from a liquid to a vapor is where most of the cooling comes from. The liquid refrigerant has to absorb a lot of heat before it will evaporate and start increasing in temperature.
I have worked as mechanical engineer for many years for a major petrochemical refinery. among other maintenance areas of Lube and Fuel refineries I was in charge of the FEU unit where and the refrigeration unit was part it to get the wax out. I was also responsible for the centrifugal compressor and was trained to troubleshoot the refrigeration centrifugal compressor doing vibration analysis using Bentley Nevada instruments. We used to send out the control valves for calibration to the workshop and the instrumentation department would get the requirements from operations for calibration of TXV? Could u please do a video on calibration of TXV? Thanks, the video was super interesting
Your video made my every doubt clear, your explanation was very simple but damn high concept, Thanks brother, I will suggest other people to subscribe your channel, your explanation is superb.
I don't understand. If the refrigerant's boiling point is so low. Then what really makes the refrigerant become liquid again? Moving air alone can't get to minus 26 degree Celsius on its own. So what's dropping the temperature to below minus 26 degree to condensate the refrigerant to liquid form?? I must be missing something.
I know it's been two years, but the compressor compresses the vapor into a liquid and packs it into the high pressure line where it can stay a liquid for a moment
so correct me if i'm wrong but long story short, the refrigerant gets heated up (pressurized), all that heat is blown outside to make it easier to cool down when its depressurized, then once its depressurized, it passes across another fan that blows cooled air inside?
6:57 the pressure does not decrease in the cans the liquid absorb some heat to become gas and maintain the pressure the pressure will decrease only when there is no liquid in the can
Doesn’t the refrigerants boiling point change at the different pressure value? So after the condenser it actually turns into liquid even though temperature is most likely not below -26C.
The Compressor compresses from state 1 to 2, and increases pressure, and temperature. Yet the (T, s) graph on the top left shows that the transformation 1 to 2 is isothermal (T is constant). Is the (T, s) graph wrong? Sorry if I missed something.
Refrigerant also condenses at higher temperature at higher pressure and it facilitates dumping out heat just like it evaporates at lower temperature at lower pressure and it facilitated absorption of heat?
Could you please make a video on VRF/VRV - especially outlining how the heat recovery function works so that heating and cooling can be carried out simultaneously?
Hi Paul I've been following your channel for a very long time. Your contents are vivid and unique. I'm learning about HVAC too, so I would appreciate if you help me suggesting the book which you've been following for HVAC. Keep doing your good work. Thank you.
Great video, thank you. It may be a silly question, but what effect (if any) does the boiling point of a refrigerant have on the temperature that can be achieved? If I wanted to make a freezer capable of reducing the temperature to -40 C what refrigerants should I consider?
The liquid accumulator at (C) is missing and the (red) compressor gas outlet appears to be going the wrong way but this might be a facet of the monitor resolution playing tricks on the eyes. Otherwise an excellent video.
Thank you for the explanation! I have a question about the used method and the process of maintaining a specific temperature. So I want to know things like what happen when the the system reach the requested temperature ? what will happen to the refrigerant, the compressor, and the fans! And what are the steps the system follow, and what happen when the temperature increases again?
Most refrigerant systems, be they the refrigerator in your house, your home A/C, or the A/C in your car, will cycle on and off. When your thermostat in your house detects that the temperature has risen above a certain range, it will simply close a small switch, which causes a couple of big relays to close, which starts your compressor, the fan on your condenser unit outside, and the blower for the evaporator inside your house. It will run until the temperature in your house reaches the lower threshold on your thermostat, then it turns off. Your refrigerator works much the same, cycling on and off as the temperature rises and falls. With your car, it depends on what sort of a/c control you have. Many cars have a simple set of knobs - you turn on the a/c, the a/c runs. As the pressure inside the a/c system rises and falls, the compressor itself will cycle off and on - that's the clicking you hear under the hood - and your radiator fan will come on, if your car has an electric one,. while the blower motor inside the car runs to cool you off. There are some cars that have automatic temperature control - these work basically the same way, only they will throttle the blower motor inside the car up and down to keep the temperature in a certain range.
so does the boiling point rise with the higher pressure? i thought 410a boiled above -50-60F, so if it leaves the compressor, it would seem like it would most definitely be a vapor, unless the increased pressure makes that boiling point rise substantially.
⚠️ *Found this video super useful?* Buy Paul a coffee to say thanks: ☕
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How Do Flash Drives Work?
The Engineering Mindset nice video
Can you please make a video about subcooling and super heat
Thank you ,it's educational item.
Why your videos are not coming in hindi version??
So, I’ve looked at about four different videos trying to figure out how refrigerants work and they have all left me with more questions than answers. Your video was actually the first one where I felt like I totally understood what a refrigerant is. Thanks a lot mate!!
Watched four different videos on this subject and all left me scratching my head. Then I watched this video with the same exact terminology and theory but explained completely different than the others and it made perfect sense. Goes to show why good teachers are important. You can have a bunch of teachers teaching on the same subject matter but one makes sense and the others don’t. The way you are being taught is just as important as what your being taught.
Great Job!!
as a civil engineer who always hated this stuff, being forced to recently understand it, the videos you make are super helpful.
Why did you need to learn this?
Who needs college when you got the EGINEERING MINDSET!!! Thanks bro...
Keep up the great work...
Thank you, we can only help teach you, we can't certify unfortunately.
@@EngineeringMindset nicely teaching sir,
@@EngineeringMindset You make it easier to pass for certification. Thank you for what you do.
Phenomenal explanation! You just helped me turn months of confusion, uncertainty and anxiety into understanding. I realize that the information I was being taught was indeed correct, but somehow since I am not working in the field, I was unable to connect the dots to understand as I do now. Thank You very much!
13,995 subs back in 2017 (1:46) to now 2.17M. That wasn't earned by making trendy videos either, well deserved. Thank you for these videos!
I feel like collecting all my “likes” on other videos on this subject and placing them here
Very clear and easy eXplanation
Glad it was helpful! we have a newer version "Supermarket HVAC" check it out
⚠️Learn how to *DESIGN A REFRIGERATION SYSTEM* here: th-cam.com/video/TPabv9iDENc/w-d-xo.html ⚠️
THIS. This is the best video to ever explain the compression refrigeration cycle thank you so much.
Always had some trouble understanding the concept of refrigeration. This video gave a thorough explanation with step by step process of the entire cycle. The numbered illustration which was animated provided me a clear understanding of the refrigeration process. For someone who sometimes struggled in school, this was a godsend. Thanks very much.
Just wait till next summer. You will have forgotten everything, so bookmark this video.
@@skipwin9895 So true 🤣🤣
best ac explaination after watching countless videos so far
thank you so much you cleared my some doubt in this video, pls sir its my request u will make some video about static pressure in HVAC and how they calculated
Thanks for this informative video, but what is the difference between vapour and steam?
i had seen many vidoes in famous chanel to understand that principe of refrigerants, this video is the best thanks 👍
Dear sir, so far the best video ever seen with the clear status of the refrigerant, god bless you sir, really a good video!
Pssst. Guess what? This channel is uploading thousands of dollars worth of easily digestible knowledge. 😂 it’s insane how good this channel is and that fact it’s free makes me laugh. I still paid for trade school but still this is literally the place to learn. I back up all my learning with this channel.
My teacher couldn’t teach this. I thank you much
Way better than what I learned in school hands down ..
Wow. Thanks for making this video. It was explained very very well.
Thank you for clearing a lot of points and linking explaination with real phenomena. Thank you very much 🙏
It's the best video I've watched to explain how refrigerant work
Minh Nguyễn hello
Best video I've watched to explain how a fridge works. Thank you.
I thought it said refrigerant not a fridge
@@VenomSkywalker. refrigerant is just the stuff inside the lines that causes the fridge to get cold. Same thing as an air conditioner just slightly different for lower temps
This was a nice explaination EXCEPT for two major issues. 1. The refrigerant in State-1 is a superheated vapor and is NOT in its saturation state! If it was, this would pose a problem to the compressor which is a "vapor" pump. It can not and does not want to see any liquid! 2. Inversly, in State-2, at the output of the condenser, the refrigerant is in a high temperature-high pressure sub-cooled liquid. The refrigerant needs to be 100% sub-cooled liquid when entering the evaporator. This is where you want all of the absorbing of heat going on, not in the liquid line.
The emf generated by the external energy , separates charge carrier (electron) from the atom of copper coil in generator similarly the energy breaks the atom of refregerent to make it vapor and hence the liquid becomes somewhat cooler. Thanks from BD.
Great video. Very well explained. Thanks a ton. The world needs teachers like you.
Best explanation with visuals I’ve seen 👏🏼 thank you
I just had a lightbulb moment! Thanks for explaining it so clearly👍🏻
Expansion valve
1. Saturated liquidity
2. Liquid/ vapor mixer
3.saturated vapour
Mindset you did it good
This is by far the most informative and easiest explanation of how system works ! Thanks so much!
There are no other best videos than this one. You are in right place! Go Ahead! and you won't regret to give me thanks!
Is it bad that I learn more in these videos than I do at school ?
Thanks for this video. This is very very good. Easy to understand.
Thank you very much for posting helps me understand HVAC systems and how coolants work
Thank you so much. Yours is an excellent description of the processes and the sciences behind each stage by explaining it with familiar examples like boiling water and spray can.
It's worth mentioning that the vapor entering the compressor is superheated, and the liquid entering the TEV is sub-cooled. Remember folks condensers reject latent heat and evaporators absorb latent heat.
Thanks for the knowledge my dude
Could you go more into detail for the evaporator stage. Everything makes sense and was easy to understand until the evaporator cycle
Temperature and pressure are related. The saturation temperature of a substance is the temp at which it will change state from a vapor to a liquid or vice versa. The saturation temp depends on pressure.
The high temp high pressure liquid refrigerant passes through the metering device. The metering device and compressor creates a pressure differential. So when the refrigerant passes through the metering device its pressure and temperature drops. So now the refrigerant temperature and saturation temperature is lower than the temperature in the space we are trying to cool.
Heat moves from hot to cold so when air is passed through the evaporator coil it the refrigerant absorbs heat from the air. The refrigerant will remain as a liquid until it has absorbed enough heat to evaporate. The state change from a liquid to a vapor is where most of the cooling comes from. The liquid refrigerant has to absorb a lot of heat before it will evaporate and start increasing in temperature.
I have worked as mechanical engineer for many years for a major petrochemical refinery. among other maintenance areas of Lube and Fuel refineries I was in charge of the FEU unit where and the refrigeration unit was part it to get the wax out. I was also responsible for the centrifugal compressor and was trained to troubleshoot the refrigeration centrifugal compressor doing vibration analysis using Bentley Nevada instruments.
We used to send out the control valves for calibration to the workshop and the instrumentation department would get the requirements from operations for calibration of TXV?
Could u please do a video on calibration of TXV?
Thanks, the video was super interesting
See our new video on how to build mechanical versions of electronic circuits? Watch here: th-cam.com/video/Zv9Q7ih48Uc/w-d-xo.html
This is the best explanation video that I've ever watched! Thank you!
it is very helpful and not complicated. thanks:)
This is a really good video. I learnt much
Incredible explanation 👏
Great graphics and logical explanation. However doesn't the refrigerant need to be superheated and not saturated before it enters the compressor?
Best video i have seen
That's a proper good video!
Your video made my every doubt clear, your explanation was very simple but damn high concept,
Thanks brother, I will suggest other people to subscribe your channel, your explanation is superb.
Great explaination
One of best video explanation about refrigerated cycle... Thank you sir.....
Lots of valuable information God bless you man it worth its weight in gold
same tutorial content. this video is very useful for those who are just learning
Pls. Make a video presentation also of pressure switch, thermistor and other ac unit accesories.
Seen our new pressure switch video? Link: th-cam.com/video/YG81w0HFXNc/w-d-xo.html
Very well explained and demonstrated, with perfect analogies, as you usually do in your videos. Loved it. Keep it up.
I don't understand. If the refrigerant's boiling point is so low. Then what really makes the refrigerant become liquid again? Moving air alone can't get to minus 26 degree Celsius on its own. So what's dropping the temperature to below minus 26 degree to condensate the refrigerant to liquid form?? I must be missing something.
I know it's been two years, but the compressor compresses the vapor into a liquid and packs it into the high pressure line where it can stay a liquid for a moment
What a great video.
Thanks a lot sir ,great education.
VERY HELPFUL HOW EXPANSION VALVE WORK NICE THANK YOU MR PAUL
way back he still have 13k subs... not its 1.4M subs.. I am feeling positive now..
so correct me if i'm wrong but long story short, the refrigerant gets heated up (pressurized), all that heat is blown outside to make it easier to cool down when its depressurized, then once its depressurized, it passes across another fan that blows cooled air inside?
Excellent video!
6:57
the pressure does not decrease in the cans
the liquid absorb some heat to become gas and maintain the pressure
the pressure will decrease only when there is no liquid in the can
GREAT LEARNING TOOLS.
Thanks, very nice and good explanation
Thank you a lot teacher! Very intresting!
simple, superb and nice explanation. keep it up👌
Doesn’t the refrigerants boiling point change at the different pressure value? So after the condenser it actually turns into liquid even though temperature is most likely not below -26C.
The Compressor compresses from state 1 to 2, and increases pressure, and temperature. Yet the (T, s) graph on the top left shows that the transformation 1 to 2 is isothermal (T is constant). Is the (T, s) graph wrong? Sorry if I missed something.
Refrigerant also condenses at higher temperature at higher pressure and it facilitates dumping out heat just like it evaporates at lower temperature at lower pressure and it facilitated absorption of heat?
Love it, make very clear
Could you please make a video on VRF/VRV - especially outlining how the heat recovery function works so that heating and cooling can be carried out simultaneously?
Check out our supermarket hvac video
New VRF unit video here:➡️ th-cam.com/video/4i1XgcP1tmw/w-d-xo.html
Best explain and clearly I am understanding. thank you so much..pls continue to update many videos sir.pls....
Thanks to the information sir
Thank you so much for the videos
Hi Paul
I've been following your channel for a very long time. Your contents are vivid and unique. I'm learning about HVAC too, so I would appreciate if you help me suggesting the book which you've been following for HVAC. Keep doing your good work.
Thank you.
There is no one book unfortunately, you need to read everything from everywhere. Or watch our videos!
@@EngineeringMindset than I will just watch your videos XD
great explanation
Very nicely done how much would it cost for a 3 bedroom semi detached.
great video as always!
thanks, very well explained
Good mate, however the vapour entering the compressor shouldn’t be saturated, it should be superheated from absorbing heat in the evaporator.
Great video, thank you. It may be a silly question, but what effect (if any) does the boiling point of a refrigerant have on the temperature that can be achieved?
If I wanted to make a freezer capable of reducing the temperature to -40 C what refrigerants should I consider?
great content!
1. Saturated vapour ( compressor )
2. superheated vapour( condenser)
Great video
Very good video. I request you to label the system refrigerant with temperature and pressure during it's path. Thank you.
We have already, please see our advanced videos
The liquid accumulator at (C) is missing and the (red) compressor gas outlet appears to be going the wrong way but this might be a facet of the monitor resolution playing tricks on the eyes. Otherwise an excellent video.
Thanks for the great videos, here is a large coffee brother!
Really appreciated, thank you for supporting us
very good .
How much temperature for the refrigerant entering the condensor?
Very good explanation
Really awesome videos i have ever came along this way of explanation till now you're explaining with best examples we are learning very quickly......
very nice video! well informed.
Very nice
Cup-il-uh-ree....really bro.... just bustin balls. great info though for new peeps. Welcome newcomers.
Thank you for the explanation! I have a question about the used method and the process of maintaining a specific temperature.
So I want to know things like what happen when the the system reach the requested temperature ? what will happen to the refrigerant, the compressor, and the fans! And what are the steps the system follow, and what happen when the temperature increases again?
Most refrigerant systems, be they the refrigerator in your house, your home A/C, or the A/C in your car, will cycle on and off. When your thermostat in your house detects that the temperature has risen above a certain range, it will simply close a small switch, which causes a couple of big relays to close, which starts your compressor, the fan on your condenser unit outside, and the blower for the evaporator inside your house. It will run until the temperature in your house reaches the lower threshold on your thermostat, then it turns off. Your refrigerator works much the same, cycling on and off as the temperature rises and falls. With your car, it depends on what sort of a/c control you have. Many cars have a simple set of knobs - you turn on the a/c, the a/c runs. As the pressure inside the a/c system rises and falls, the compressor itself will cycle off and on - that's the clicking you hear under the hood - and your radiator fan will come on, if your car has an electric one,. while the blower motor inside the car runs to cool you off. There are some cars that have automatic temperature control - these work basically the same way, only they will throttle the blower motor inside the car up and down to keep the temperature in a certain range.
THANK YOU SOOOOO MUCH MR ODDMAN1980...
Seen our new pressure switch video? Link: th-cam.com/video/YG81w0HFXNc/w-d-xo.html
Very good video
Thank so much Sir...
so does the boiling point rise with the higher pressure? i thought 410a boiled above -50-60F, so if it leaves the compressor, it would seem like it would most definitely be a vapor, unless the increased pressure makes that boiling point rise substantially.
Hi, what determines the Suction pressure (Evaporating temperature) & Discharge pressure (Condensing temperature) of refrigerant?
Can you get a flow alarm if you havent evacuated a heat pump?
Thank you.