Best instructor/ teacher I have found by far. I am so thankful you have dedicated your time to help people like me that are new to refrigeration. You are a great example for others on how to teach.
Hi Ty, I wanted to say thank you for your excellent videos on HVAC systems! They have and continue to be a great source of knowledge for me. I only wish I can go in to the “lab” with when you break at the end of the videos. Thanks again, Steve
Okay I'm a graduate of NTI online course for hvacr I think I'm doing pretty decent on my own about to go work for somebody else hopefully but I just wanted to say thank you and I'm kind of happy I found your videos on TH-cam because I know you will inspire others. You did a good job. Keep up the good work
In 2010, a European Regulation called the ‘ODS Regulation’ banned all use of new R22. If you’re in possession of AC or refrigeration units that still operate on R22, you won’t be able to top them up from 2015. Instead, you’ll either have to replace your old units with new, compliant equipment, or use a modern refrigerant to top them up, which will mean having parts of the existing units replaced.
Its such a touchy topic here. people are hard one way or the other. I find most techs here don't believe in Ozone depletion or recovery. I would love to do some refrigeration work over there!
You are an amazing teacher that teaches with passion. I'm HVAC student and eager to learn. Unfortunately my teacher doesn't have not even near fraction how you teach. But was fortunate to find you and watch your videos. Keep up great work and God bless you and lots if years of health and success.
Excellent explaination. I love your style of teaching. Can you do lessons on; hot gas bypass, compressor pressure regulator, evaporator pressore regulator, recievers, oil separator
at around 22:45 you ask them to notice theres a little liquid in the container so, 410a is at its saturation point at 200 psig. then you ask them the temperature of it. what formula are they using to get the answer? also, agree to everyone saying youre easily the best instructor ive run across on the subject. thanks
Thank you! We use a temperature pressure chart. That can be found with printed versions but now most people use apps. You select the refrigerant, then you choose the pressure and it will tell you the temperature, or you choose the temperature and it will show you the pressure.
If you want a nice first day prop to demonstrate the "cooling" effect of phase change, fill a big glass jar with acetone (so you can seal it and reuse it,) and have some surgical gloves handy and have them put on a glove and dip their hand in the acetone and bring it back out. Ask them how their hand feels. The acetone is at room temperature but the saturation point ie evaporation point is actually far higher but the vapor pressure is greater and creates a faster evaporation. Anyways, none of that is needed because it'll just confuse your presentation here but the point is to show them how a drastic phase change causes a drastic temperature change. Your hand will "feel" cold because your hand is accelerating the rate of change and heat is being drawn off. you'll probably want to vent the room or do it near the window or something.
there are some Israeli AC with compressors that will vary the speed to save energy so the compressor won't start and stop all the time. The compressor will keep running always but at lower speed when it is not needed
@@love2hvac Thanks for the reply.....yes I'm sure its gonna raise a snigger with my students ( I ordered one a few days ago)....to be honest, I just caught a glimpse of the box as you put it away 🙂. I'm a Refrigeration and Air Con Lecturer and Assessor here in the UK ( soon to retire)....I'm a great fan of your tutorial videos and I like the delivery. I have a few videos of my own I use for my students for remote teaching and learning. Keep up the great work buddy 🙂 Wishing you all the best from over the Pond....keep safe and well Rob
Hi Ty, Another quick question, If the temperature of the gas is now lower coming out of the condensor, is the pressure lower in the liquid line then or does the pressure stay the same?? So before the condesor we get a high pressure vapour and a lower pressure on the liquid line due to the heat the condensor has given up??? P.S Great seeing you back on youtube 👍👍
The pressure on the high side is about the same all the way threw. We convert that pressure to a saturated temperature that is taking place in the middle of the condenser. Before that (compressor to the top little bit of condensor) the refergerant is superheated above that point. At the end of the condenser and the liquid line the compressor is sub cooled below the saturation point. We can get the pressure anywhere on the high side since it's almost the same. We just need that number to convert to know our saturation.
When you say the compressor uses more electricity but runs at the same speed is that because the extra energy is lost in the form of electrical resistance under higher load/ pressure?
so if low on refrigerant the pressure goes down and the temp goes down in the evaporator, which means it gets colder, and can freeze up. so why then when my cars ac is low on refrigerant It stops cooling? there is less refrigerant so less pressure so less temperature so it gets colder, and if you had air moving past the coils which had no moisture in it then no ice up so you should be getting even more cold air than before. and if the pressure keeps dropping where does it end? does the evaporator keep getting colder and colder? once you have liquid refrigerant it would seem that you would want it to spray out and go to the lowest pressure possible to get the lowest temperature possible for the most cooling possible. but why does the low side always operate at a higher pressure ? when it seems the lower pressures produce colder temperatures? what happens if you feed the compressor with refrigerant gas that is not under any pressure, would it still compress then condense and make liquid refrigerant? I am not understanding the why behind the evaporator system that can freeze up, why not have a larger evaporator so you distribute the cold over a larger surface area and prevent it from freezing? and then you can run everything at lower pressures and maybe save on electrical power in the evaporator fan motor? or maybe not need the fan at all. and I know the compressor produces the heat during the compressing process just wondering if you could compress the gas without producing the heat would the refrigerant become a liquid just from being compressed? if so then why would you need the condensing coils? I don't understand the waste energy in the heat pump. how come the heat produced by the compressor is just blown out into the environment ? the compressor should be cooled by a liquid that can be stored to use at night. and in effect the ac unit is a atmospheric water extractor, why do we not collect the water? also the refrigerant under pressure is potential energy if sprayed out it has force, why are we not using this force to do something as it is released and turned to a gas? I guess in order to sell heat pumps and ac units they have to conform to a certain size which require fans. however it would seem that you could do away with the fans and the energy they use by just creating a heat pump that takes up more room with much larger condenser and evaporator coils or maybe you could just use a large tank like the crosley icy ball. allow conduction, radiation and convection to extract heat and cool. oh and you are like the most skilled teacher I have ever listened too.
Your videos are excellent. I think they would be even more helpful if they were titled such that you could view them in the order in which you delivered them live.
Thank you. I am going to work on some this winter. I recorded with a videographer for National Technical Institute. Thay have a full program that is organized and 1000 times better quality. Plus they have diploma options. Thanks for watching and the feed back.
very interesting..., but what if we have a variable displacenent compressor, then SH and SC do not "be/work" naturally anymore, but we may have some deceptive parameters due to the variable operation of the compressor. do not speak english very well hope you understand.
That is correct. 2stage we can check on high with Sh SC, However with variable speed we have to follow the manufactures instructions, typically including weighing in the charge. They use algorithms to control everything else
@@love2hvac so in a car air conditioning system, if we have a fixed piston compressor, we can rely on the SH and SC parameters, with a variable displ. compressor we can also deduce something useful from SH and SC? or not much ?
In a car ac we can run the RPM to a set point and check superheat and subcooling. In a single to single variable speed unit it is sometimes possible to check with SH SC with the highest setting also. Most of the variable Refregerant Flow VRF, variable Refregerant volume, VRV systems have multiple heads and valves changing the flow constantly. It's not just the compressor changing speed, the the valves, metering devices, fans, and a bunch of other controls working together. It's a beautiful thing
The reason for a metering device is to drop pressure/temperature so the saturation pres/temp is lower....why we have to make.sure.pressure/temp is.rediced.before.the evaporator!?? Does anyone also know what should be DTD for.an.AC evap.coil in Cels...
Freon™ is a trademark of the Chemours company FC, LLC. Filed in February 3 (1972) but originally trademarked by Dupont in 1930. It is one brand of many such as option, puron, hotshot, choice, bluon, Forane, ecofreze, and many any more. If you dip the refergerant tank in water, it will only change the saturation of the refregerants depending on the temperature of the water. Warmer water will have a higher saturated temperature and pressure. Cooler water will result in a lower temperature and pressure. There should never be any refregerant consumption. The re of refregeranteans it continues in a cycle of low temp boiling low tep superheat, high temp superheat, high temp desuperheat, high temp condensing, high temp subcool, low temperature flash gas and back to low temp boiling. Refregerant never wears out, only leaks out and is never consumed.
@@love2hvac mu question is based on our equipment using a freon with pressure regulator mixed with air with certain pressure. And it was applied directly in hot formed glass bottles. The purpose is to prevent bloom inside the formed bottles. In other words no condenser and evaporator in our system.. Im just correlating from your inputs that if the pressure and temp is drop or lower, the saturation temp is also lower.. With that im thinking that we can save freon consumption
Freon™ of Chemours, you will have to contact them as I'm not an authorized representative of thir specific products. Here is the link. www.chemours.com/en/contact?_ga=2.182411175.187493589.1627482008-1710441185.1625681717
why can't we use leverage some how to compress the gas like the milkovic oscillator uses gravity to create a secondary oscillation which has a lot of power. compress the gas over time with lower energy cost and store the pressurized liquid like we would propane. then use it when needed while using again conduction, convection and radiation to do the work of the fans.
This Dude was a great teacher man. He explained and referenced the refrigerant cycle better than any of my 3 teachers in my 3 years of school so far…
Best instructor/ teacher I have found by far. I am so thankful you have dedicated your time to help people like me that are new to refrigeration.
You are a great example for others on how to teach.
I am Slovak. This is the best explanation process of refrigerant. Big Thanks :)
This guy is best the teacher of this subject that I've ever come across. I salute you sir! Thanks for making my life easier!
I find this instructor to be a good communicator. Know his subject, and is good with the students.
What a great understanding of the dynamics of the system which makes diag easier
Hi Ty, I wanted to say thank you for your excellent videos on HVAC systems! They have and continue to be a great source of knowledge for me. I only wish I can go in to the “lab” with when you break at the end of the videos. Thanks again, Steve
Im going to make some lab videos soon focused for the viewer
Okay I'm a graduate of NTI online course for hvacr I think I'm doing pretty decent on my own about to go work for somebody else hopefully but I just wanted to say thank you and I'm kind of happy I found your videos on TH-cam because I know you will inspire others. You did a good job. Keep up the good work
Thank you George
@@love2hvac actually, thank you.
Thank you very much for the wonderful explanation. Rony, Israel.
In 2010, a European Regulation called the ‘ODS Regulation’ banned all use of new R22.
If you’re in possession of AC or refrigeration units that still operate on R22, you won’t be able to top them up from 2015. Instead, you’ll either have to replace your old units with new, compliant equipment, or use a modern refrigerant to top them up, which will mean having parts of the existing units replaced.
Its such a touchy topic here. people are hard one way or the other. I find most techs here don't believe in Ozone depletion or recovery.
I would love to do some refrigeration work over there!
..."it's going to go up" Drill it until they get it! great vid!
Thanks for this, It just got me through early hours of the morning on night shift in a gas plant...
You are an amazing teacher that teaches with passion. I'm HVAC student and eager to learn. Unfortunately my teacher doesn't have not even near fraction how you teach. But was fortunate to find you and watch your videos. Keep up great work and God bless you and lots if years of health and success.
Excellent explaination. I love your style of teaching. Can you do lessons on; hot gas bypass, compressor pressure regulator, evaporator pressore regulator, recievers, oil separator
Thank you and Yes, I am working on them
Sir the way you are teaching with is really excellent.
at around 22:45 you ask them to notice theres a little liquid in the container so, 410a is at its saturation point at 200 psig. then you ask them the temperature of it. what formula are they using to get the answer? also, agree to everyone saying youre easily the best instructor ive run across on the subject. thanks
Thank you!
We use a temperature pressure chart.
That can be found with printed versions but now most people use apps.
You select the refrigerant, then you choose the pressure and it will tell you the temperature, or you choose the temperature and it will show you the pressure.
If you want a nice first day prop to demonstrate the "cooling" effect of phase change, fill a big glass jar with acetone (so you can seal it and reuse it,) and have some surgical gloves handy and have them put on a glove and dip their hand in the acetone and bring it back out. Ask them how their hand feels. The acetone is at room temperature but the saturation point ie evaporation point is actually far higher but the vapor pressure is greater and creates a faster evaporation. Anyways, none of that is needed because it'll just confuse your presentation here but the point is to show them how a drastic phase change causes a drastic temperature change. Your hand will "feel" cold because your hand is accelerating the rate of change and heat is being drawn off. you'll probably want to vent the room or do it near the window or something.
Awesome! My next class I will get acetone!!!!
Thank you, great idea!
there are some Israeli AC with compressors that will vary the speed to save energy so the compressor won't start and stop all the time. The compressor will keep running always but at lower speed when it is not needed
Yes we use those here aswell.
Great Tutorial....whats the technical name for the Lab Glassware...ie the 2 Balls with fluid? thanks.....wait up....I see it...'Hand boiler' 🙂
Sorry for the late reply, yes its a hand boiler I should have included that. The thought of asking for 2 balls with fluid makes me chuckle.
@@love2hvac Thanks for the reply.....yes I'm sure its gonna raise a snigger with my students ( I ordered one a few days ago)....to be honest, I just caught a glimpse of the box as you put it away 🙂. I'm a Refrigeration and Air Con Lecturer and Assessor here in the UK ( soon to retire)....I'm a great fan of your tutorial videos and I like the delivery. I have a few videos of my own I use for my students for remote teaching and learning. Keep up the great work buddy 🙂 Wishing you all the best from over the Pond....keep safe and well Rob
My doubts cleared. Thanks sir.
Hi Ty,
Another quick question,
If the temperature of the gas is now lower coming out of the condensor, is the pressure lower in the liquid line then or does the pressure stay the same??
So before the condesor we get a high pressure vapour and a lower pressure on the liquid line due to the heat the condensor has given up???
P.S
Great seeing you back on youtube 👍👍
The pressure on the high side is about the same all the way threw.
We convert that pressure to a saturated temperature that is taking place in the middle of the condenser. Before that (compressor to the top little bit of condensor) the refergerant is superheated above that point. At the end of the condenser and the liquid line the compressor is sub cooled below the saturation point.
We can get the pressure anywhere on the high side since it's almost the same. We just need that number to convert to know our saturation.
you are great teacher thank you!
Thank you Sir for clearing basic doubts
👍🥃
Great teacher 👨🏫 👍🏽
Solid
When you say the compressor uses more electricity but runs at the same speed is that because the extra energy is lost in the form of electrical resistance under higher load/ pressure?
Yes!
so if low on refrigerant the pressure goes down and the temp goes down in the evaporator, which means it gets colder, and can freeze up. so why then when my cars ac is low on refrigerant It stops cooling? there is less refrigerant so less pressure so less temperature so it gets colder, and if you had air moving past the coils which had no moisture in it then no ice up so you should be getting even more cold air than before. and if the pressure keeps dropping where does it end? does the evaporator keep getting colder and colder? once you have liquid refrigerant it would seem that you would want it to spray out and go to the lowest pressure possible to get the lowest temperature possible for the most cooling possible. but why does the low side always operate at a higher pressure ? when it seems the lower pressures produce colder temperatures? what happens if you feed the compressor with refrigerant gas that is not under any pressure, would it still compress then condense and make liquid refrigerant? I am not understanding the why behind the evaporator system that can freeze up, why not have a larger evaporator so you distribute the cold over a larger surface area and prevent it from freezing? and then you can run everything at lower pressures and maybe save on electrical power in the evaporator fan motor? or maybe not need the fan at all. and I know the compressor produces the heat during the compressing process just wondering if you could compress the gas without producing the heat would the refrigerant become a liquid just from being compressed? if so then why would you need the condensing coils? I don't understand the waste energy in the heat pump. how come the heat produced by the compressor is just blown out into the environment ? the compressor should be cooled by a liquid that can be stored to use at night. and in effect the ac unit is a atmospheric water extractor, why do we not collect the water? also the refrigerant under pressure is potential energy if sprayed out it has force, why are we not using this force to do something as it is released and turned to a gas? I guess in order to sell heat pumps and ac units they have to conform to a certain size which require fans. however it would seem that you could do away with the fans and the energy they use by just creating a heat pump that takes up more room with much larger condenser and evaporator coils or maybe you could just use a large tank like the crosley icy ball. allow conduction, radiation and convection to extract heat and cool. oh and you are like the most skilled teacher I have ever listened too.
Your videos are excellent. I think they would be even more helpful if they were titled such that you could view them in the order in which you delivered them live.
Thank you.
I am going to work on some this winter.
I recorded with a videographer for National Technical Institute. Thay have a full program that is organized and 1000 times better quality. Plus they have diploma options. Thanks for watching and the feed back.
@@love2hvac I want in
very interesting..., but what if we have a variable displacenent compressor, then SH and SC do not "be/work" naturally anymore, but we may have some deceptive parameters due to the variable operation of the compressor. do not speak english very well hope you understand.
That is correct.
2stage we can check on high with Sh SC,
However with variable speed we have to follow the manufactures instructions, typically including weighing in the charge.
They use algorithms to control everything else
@@love2hvac so in a car air conditioning system, if we have a fixed piston compressor, we can rely on the SH and SC parameters, with a variable displ. compressor we can also deduce something useful from SH and SC? or not much ?
@@love2hvac what you mean 2stage?
In a car ac we can run the RPM to a set point and check superheat and subcooling.
In a single to single variable speed unit it is sometimes possible to check with SH SC with the highest setting also.
Most of the variable Refregerant Flow VRF, variable Refregerant volume, VRV systems have multiple heads and valves changing the flow constantly. It's not just the compressor changing speed, the the valves, metering devices, fans, and a bunch of other controls working together.
It's a beautiful thing
climate.emerson.com/en-us/products/heating-and-air-conditioning/two-stage-compressors
Great lectures!
The reason for a metering device is to drop pressure/temperature so the saturation pres/temp is lower....why we have to make.sure.pressure/temp is.rediced.before.the evaporator!?? Does anyone also know what should be DTD for.an.AC evap.coil in Cels...
So AC system for a home and AC system for a car are the same principles?
Pretty much every AC system across the board is the same basic principles.
Yes sir!
What’s the website Ty??
Question
What if we dip the freon tank in water, can we save freon consumption?
Freon™ is a trademark of the Chemours company FC, LLC. Filed in February 3 (1972) but originally trademarked by Dupont in 1930.
It is one brand of many such as option, puron, hotshot, choice, bluon, Forane, ecofreze, and many any more.
If you dip the refergerant tank in water, it will only change the saturation of the refregerants depending on the temperature of the water. Warmer water will have a higher saturated temperature and pressure. Cooler water will result in a lower temperature and pressure.
There should never be any refregerant consumption. The re of refregeranteans it continues in a cycle of low temp boiling low tep superheat, high temp superheat, high temp desuperheat, high temp condensing, high temp subcool, low temperature flash gas and back to low temp boiling. Refregerant never wears out, only leaks out and is never consumed.
@@love2hvac mu question is based on our equipment using a freon with pressure regulator mixed with air with certain pressure. And it was applied directly in hot formed glass bottles. The purpose is to prevent bloom inside the formed bottles. In other words no condenser and evaporator in our system..
Im just correlating from your inputs that if the pressure and temp is drop or lower, the saturation temp is also lower.. With that im thinking that we can save freon consumption
Is it possible sir? Please enlighten me. thank you
Freon™ of Chemours, you will have to contact them as I'm not an authorized representative of thir specific products.
Here is the link. www.chemours.com/en/contact?_ga=2.182411175.187493589.1627482008-1710441185.1625681717
!
Wow 😨 R22 that is unicorn juice 😂
why can't we use leverage some how to compress the gas like the milkovic oscillator uses gravity to create a secondary oscillation which has a lot of power. compress the gas over time with lower energy cost and store the pressurized liquid like we would propane. then use it when needed while using again conduction, convection and radiation to do the work of the fans.
1d audio 🥶