I absolutely love how thorough you are! thank you! recently changed my career and became a hvac tech for the union in Hawaii but being a female in this field has its disadvantages. your videos will definitely help me. thank you
Thank you very much for creating this video and sharing. Great job. The very difficult job of explaining a multiple things - multiple equipment, diagrammatic presentation and the real world equipment - has been made very simple to understand. The overall quality of the video talks a lot about the efforts you have put into this.
What a great guy you are. Thank you immensely for connecting with real world applications. I never understood what are the real functions of all these systems up until now. Subscribed :)
The display of pictures of real thing along the way is very effective. Most building I have seen have the chiller on the roof. The AHU are most effective on each floor as you have display. Very good and thank you!
My brother, thank you for this. Just got hired at Hilton Ballpark in downtown St Louis, Missouri as an engineer. I've mostly have done apartment maintenance so haven't touched chillers since I was a student at Ranken Tech so wanted to brush up on my chiller knowledge since we have 2. This brought back everything for me. Thank you...
I have designed many systems where AHUs are located in hallways, inside the facility, usually above drop ceilings for in indoor agriculture and greenhouse design. Rooftop units work best on flat roofs but many buildings and greenhouses are pitched/temered glass and are pitched roof design. AHU's can be located above drop ceilings in office buildings or dropped directly inside the greenhouse, to prevent infiltration. It is also recommended that AHU's are placed in the conditioned space, as shown modeled in this video, for CO2 injection applications.
I have been trying to learn about HVAC systems for a while now and this is the first video I've come across that has done an amazing job of it. It was very well explained and informative. I now intend to watch all of your videos because you made it a very enjoyable experience. THANK YOU! I will be donating for sure. Wonderful~!
Chris C I have worked in high rise building here in the US, and all of the buildings have the AHU's just like the illustration shown. Every floor has a Mechanical room with its AHU, now the only difference is, the cooling tower some have it separated from the building its self. Built by it self on the parking garage.
I really appreciate your work! Although i'm from Asia, I can fully understand your clear explanation. I hope you may make more videos in various topics such as fire service, pipe and electrical installation.
Thank you for creating these videos, I am taking notes to be prepared when I start my HVAC study course next year. Question though: How does the evaporator able to absorb heat when it is next to a blower that blows cold air?
Good video. I used to work in a server room, and we would have to check the temperature on a regular basis. We had to check to chiller sometimes as well, and I always wondering how everything was connected.
+Eddy Temiz Thanks, Eddy. Glad you enjoyed. We'll be uploading some more detailed videos soon so subscribe to get notified. We're working on a number of engineering calculators for the website too.
Hi do you have some video in which you show how to carry out jobs like: replacing oil filters, or replacing the oil in the compressor, or the dryer filter or that kind of stuff? also how to recharge refrigerant and so?...
just one question, in the video, you said the red pipe is the higher temperature, but why the compressor is connected to the orange pipe? I thought the red pipe should connect the compressor because it needs to be pumped up to the cooling tower? (like the darker blue pipe pumping up to the AHU'S
Great video! I hope anyone could answer my question: I have question regarding the condenser's purpose. What is the point of the hot water loop, and how does it reach such high temperatures? It comes back a bit chilled, and then it absorbs heat from the refrigerant and continues it's hot water loop? The refrigerant as well, is the purpose of the process to have the refrigerant absorb the heat from the cold water return and circulate the water back up to the AHU? Thank you in advance for clarifying!
Do you need a pump on your warm condensor return to push the return to cooling tower? The diagram shows the pump in the wrong pipe. Just wanted to know.
The video didnt help. Does the pump push through the condensor and then up to the cooling tower? Or should the pump be in front of the condensor? Or does it vary system to system?
Wow.. What a fantastic narration and presentation. My thirst to know on how chillers are working has been done at least. never see such a well narrated one. Keep it up. Subscribed your channel and waiting for more knowledge .
Great video, just to confirm. The pump that exists the condenser should be in the hotter tube? to take that water to the cooling and tower. And then the water falls by gravity in the orange tube, right?
Thanks for the video! Where is the inlet water on the chilled side Coming from? In the condenser side, there is makeup water for the cooling tower. Since this is a closed loop, how is water getting in and out of the chiller in the first place?
So because of a bigger scale, we now have AHU and evaporator on the cool side, condenser and cooling tower on the hot side, compare to just evaporator and condenser, right?
AHU's are generally placed in the roof or ground. I've worked in hvac for years now and never seen it like that. That said it could well be done like that outside of Ireland where I live where most of our buildings are low rise. nice job on the 3d model dude
Sorry... should have waited to the end of the video, you said just for its illustration purposes. Still I wonder if it is like that in larger buildings?
Hi Chris, yes in smaller buildings AHU's are usually found on the roof or basement. But with the high rise commercial buildings, especially those with tenanted floors, you'll often find AHU's on the floors.
Commercial Air handlers are NEVER put on the roof, unless you mean a Rooftop unit (RTU) or possibly talking about a Penthouse Unit?. In 38 years in this business I have never seen a rooftop air handler, RTU's Yes, Rooftop A/H's no,,, They DO However put them in the ceiling in some smaller buildings, if they're on a loop, or sometimes in Light Commercial they used to put in a regular split system with the A/H in the ceiling, but with new codes there are NO ceiling installations and DEFINITELY No rooftop A/H's
Hello. I'm in NYC and just recently gotten involved with Engineering school. Unfortunately I am lost what would be the best video to start with. Iv always been more of hands on as well as videos...I'm 2 month in and lost... thanks
Well, what kind of engineering courses are you taking? Hydraulic? Electrical? Civil? Mechanical? By narrowing down what sort of subjects you've got, you're more likely to find what you're looking for.
So what exactly happens to the chiller itself when the water cooling tower stops working? Does everything shut down automatically or does the chiller trip out on high head pressure?
Great job, very clear about the cooling circle thanks for wonderful job! Are the condenser and chiller connected by refrigerant? Could you please explain the pressure inside the machine, are they the same pressure? Thanks so much.
+Tian Tian There will be a difference in pressure between the water inside the tubes and the refrigerant on the outside. The chilled and condenser water flow only through tubes in either the evaporator or condenser respectively, the water is completely separated from each other and the refrigerant, it just transfers it's heat through the tube walls into the refrigerant or vise versa. The refrigerant is the only fluid which passes around the inside of the machine between the compressor, condenser, expansion valve and the evaporator. 1) The refrigerant is sucked into the compressor. It's pressure and enthalpy will increase. 2) It then enters the condenser where the pressure remains the same but the enthalpy decreases because it transfers it's heat through the tube wall and into the condenser water which is sent to the cooling tower. 3) Next it passes through the expansion valve where it drops in pressure but the enthalpy remains almost constant. As the refrigerant expands, its volume increases and so it will drop in pressure. 4) Finally it enters the evaporator. The refrigerant will be at a lower temperature than the entering chilled water in the tubes. This causes the heat to transfer from the entering chilled water and into the refrigerant. The refrigerant will begin to boil and evaporate, this increases the refrigerants enthalpy but it's pressure remains constant.
⚠️ *Found this video super useful?* Buy Paul a coffee to say thanks: ☕
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The Engineering Mindset
Hello sir very nice explanation, please make video on maintenance engineering
MR PAUL HOW AIR RETURN WORK ON CHILLER
Paul, would you be interested in creating a small video for my company? For a fee of course.
Sir please make a video and tell us that why we put always chilled water supply line bottom of the AHU and FCU.
Great video..but you should definitely get gulps of coffee before recording the video
I’m a hvac sparky of 8 years and still love learning and topping up my knowledge of different systems, love your videos
Nice
I am a dumbhead learning architecture. I have to learn building services and I have found your videos very very very helpful. thank you.
I absolutely love how thorough you are! thank you! recently changed my career and became a hvac tech for the union in Hawaii but being a female in this field has its disadvantages. your videos will definitely help me. thank you
What are you making an hour in Hawaii?
Thank you very much for creating this video and sharing. Great job. The very difficult job of explaining a multiple things - multiple equipment, diagrammatic presentation and the real world equipment - has been made very simple to understand. The overall quality of the video talks a lot about the efforts you have put into this.
+Pushkar Deshpande Glad you enjoyed it. The videos take a while to make but we try to make them as high quality and easy to understand as possible.
@@EngineeringMindset how can I train chiller cooler repairer
What a great guy you are. Thank you immensely for connecting with real world applications. I never understood what are the real functions of all these systems up until now. Subscribed :)
The display of pictures of real thing along the way is very effective. Most building I have seen have the chiller on the roof. The AHU are most effective on each floor as you have display. Very good and thank you!
Thanks Sun Shine, glad you enjoyed the video!
I am new to programming HVAC smart buildings, your videos have been very helpful. Thank you my friend.
I work for Temtrol in Oklahoma that builds these air handlers and install the coils. It's nice to see how they actually work in the building
Ignore the Hayters
As a Mechanical Engineer and a Construction Superintendent your videos are phenomenal
Am just starting out my career in the building services industry and your videos have helped me get in the right direction. Keep up the good work.
My brother, thank you for this. Just got hired at Hilton Ballpark in downtown St Louis, Missouri as an engineer. I've mostly have done apartment maintenance so haven't touched chillers since I was a student at Ranken Tech so wanted to brush up on my chiller knowledge since we have 2. This brought back everything for me. Thank you...
I have an wxam tomorrow and this video helps me a lot to to understand the process. Thankyou so muuccchhh
I have designed many systems where AHUs are located in hallways, inside the facility, usually above drop ceilings for in indoor agriculture and greenhouse design. Rooftop units work best on flat roofs but many buildings and greenhouses are pitched/temered glass and are pitched roof design. AHU's can be located above drop ceilings in office buildings or dropped directly inside the greenhouse, to prevent infiltration. It is also recommended that AHU's are placed in the conditioned space, as shown modeled in this video, for CO2 injection applications.
I have been trying to learn about HVAC systems for a while now and this is the first video I've come across that has done an amazing job of it. It was very well explained and informative. I now intend to watch all of your videos because you made it a very enjoyable experience. THANK YOU! I will be donating for sure. Wonderful~!
Chris C I have worked in high rise building here in the US, and all of the buildings have the AHU's just like the illustration shown. Every floor has a Mechanical room with its AHU, now the only difference is, the cooling tower some have it separated from the building its self. Built by it self on the parking garage.
Absolutely, the installation really depends on the design, size and purpose of the building and every building will do it slightly different.
I really appreciate your work! Although i'm from Asia, I can fully understand your clear explanation. I hope you may make more videos in various topics such as fire service, pipe and electrical installation.
Thank you for creating these videos, I am taking notes to be prepared when I start my HVAC study course next year.
Question though: How does the evaporator able to absorb heat when it is next to a blower that blows cold air?
Nice, helpful video that shows both diagrams and real-world equipment.
Thanks!
Thank you, Militaru
I find this video very helpful in understanding how the system works
by far this is the greatest video posted on youtube explaining in details how chillers work thanks
This video is a great educational resource. Thank you
Well explained. Thanks for taking the time to freely teach others.
Simple and easy explanation for beginners to understand.
Thanks for providing 3D model and real equipment outlook for better understanding.
I love how well you visually explain things. I'm watching all of your videos.
Thanks for making this content. I'm learning a bunch from you
i freaking love u man!! thanks so much, now i can rebut the old and grumpy engineers im working with!
+Giri Thiru glad you liked it. Now that you know how the system works, you can act grumpy too!
Very well explained! This has helped me tremendously as I'm just starting out in building services.
Good video. I used to work in a server room, and we would have to check the temperature on a regular basis. We had to check to chiller sometimes as well, and I always wondering how everything was connected.
akdude81 your thirst for knowledge inspires me
Very informative video! One information got me seriously the orientation of the pump that most installer mistake. Thank you and God Bless
Thank you so much.... very useful....i just started my career in hvac systems...gives me a good understanding of basic.
That was fantastic. Best ive ever seen it explained.
Brilliant explanation, I will be showing this to the apprentices on their first day.
This is awsomeYou have made so simple to understand
+Amer Alanati Glad you enjoyed it.
Best channel for hvac I've found thus far!
Thanks Paul it was super informative and easy to understand
Thank you for this HVAC video training and Gbu. Amen.
Bro gave an amazing excuse saying " Its a free video so i'm not correcting". But genuinely thank you for an amazing video loaded with knowldge
very well explained and informative. love how you showed inside/cross-section of the chiller as well.
+Eddy Temiz Thanks, Eddy. Glad you enjoyed. We'll be uploading some more detailed videos soon so subscribe to get notified. We're working on a number of engineering calculators for the website too.
The Engineering Mindset im starting industrial refrigeration next week so these videos are great for me.
The Engineering Mindset mjoe.
I'm proud I noticed the left pump was oriented incorrectly before you mentioned it 💪good video
Great explanation, keep uploading
Awesome video for a basic understanding- Thanks !
tHANK YOU SO MUCH...IT WAS VERY INFORMATIVE ..NICE OF YOU TO EXPLAIN IN SUCH SIMPLE LANGUAGE..GOD BLESS YOU !!
great work...vry simple.....and detailed.........
Never touched one before. Very interesting!!! I've seen many of them.
THANKS A LOT ....!!! GREAT GREAT EFFORTS ... KEEP UP THE AWESOME WORK YOU ARE DOING..!!!
Hi do you have some video in which you show how to carry out jobs like: replacing oil filters, or replacing the oil in the compressor, or the dryer filter or that kind of stuff? also how to recharge refrigerant and so?...
+Celso Garcia Not yet but we're working on it!
Very nicely explained in 3D Model of CHWS.......Thanks
I did overhaul many 19XR chillers,, it’s really amazing
just one question, in the video, you said the red pipe is the higher temperature, but why the compressor is connected to the orange pipe? I thought the red pipe should connect the compressor because it needs to be pumped up to the cooling tower? (like the darker blue pipe pumping up to the AHU'S
A great set of valuable information. Thanks Paul.
Thanks mate do really appreciate this! you are explaning this very well. Needed a refresher, Going to work with cooling n heating in Bristol!
You helped my understanding of how the system work so much thank you and carry on please!
Very well explained! Great video.
amazingly clear explanation
Great video mate.
You deserve more than a million subscriber!
Please provide videos on marine machineries and equipments. It would be so helpful for mariners attending several exams.
Great video! I hope anyone could answer my question:
I have question regarding the condenser's purpose. What is the point of the hot water loop, and how does it reach such high temperatures? It comes back a bit chilled, and then it absorbs heat from the refrigerant and continues it's hot water loop?
The refrigerant as well, is the purpose of the process to have the refrigerant absorb the heat from the cold water return and circulate the water back up to the AHU?
Thank you in advance for clarifying!
Do you need a pump on your warm condensor return to push the return to cooling tower? The diagram shows the pump in the wrong pipe.
Just wanted to know.
Here this should help: th-cam.com/video/ak51DHAiuWo/w-d-xo.html
The video didnt help. Does the pump push through the condensor and then up to the cooling tower? Or should the pump be in front of the condensor? Or does it vary system to system?
Awesome! That's such great analysis, and very clear and systematic. Thanks so much.
Excellent explaination, really appreciates!
Wow.. What a fantastic narration and presentation. My thirst to know on how chillers are working has been done at least. never see such a well narrated one. Keep it up. Subscribed your channel and waiting for more knowledge .
great video for explain HVAC system :)
Great video, just to confirm. The pump that exists the condenser should be in the hotter tube? to take that water to the cooling and tower. And then the water falls by gravity in the orange tube, right?
this video was very helpful.
Great video. Thank you!!
Great video so much great information I really appreciate it keep up the good work
Love this 👏
Extremely useful content! Thanks for the effort
Great video!
Well done mate. Very clear explanation about this system.
Very informative. Thanks for uploading
great job mate.. comprehensive details of each system
Plenty more systems here: theengineeringmindset.com/hvac-systems/
excellent video explanation, thanks a lot
Refreshing my memory on the CHW system. Thank you for a great video!
Thankyou. . thanks a lot for helping me to understand it.
good explanation thank you.
btw. WHICH software did you use to make the draws? thanks in advance
Thanks for the video! Where is the inlet water on the chilled side
Coming from? In the condenser side, there is makeup water for the cooling tower. Since this is a closed loop, how is water getting in and out of the chiller in the first place?
See the chilled water schematic video, inlet at pressurisation unit
Please can I get a link to the video?
thanks. this video is really useful!!
Thank you Paul!
So because of a bigger scale, we now have AHU and evaporator on the cool side, condenser and cooling tower on the hot side, compare to just evaporator and condenser, right?
Very nice explain ...Thanks..
great video, thanks
thanks man it really helped me
Thank you so much for creating these!
AHU's are generally placed in the roof or ground. I've worked in hvac for years now and never seen it like that. That said it could well be done like that outside of Ireland where I live where most of our buildings are low rise. nice job on the 3d model dude
Sorry... should have waited to the end of the video, you said just for its illustration purposes. Still I wonder if it is like that in larger buildings?
Hi Chris, yes in smaller buildings AHU's are usually found on the roof or basement. But with the high rise commercial buildings, especially those with tenanted floors, you'll often find AHU's on the floors.
The Engineering Mindset can u make a video on how to clean the cooling tower
Commercial Air handlers are NEVER put on the roof, unless you mean a Rooftop unit (RTU) or possibly talking about a Penthouse Unit?. In 38 years in this business I have never seen a rooftop air handler, RTU's Yes, Rooftop A/H's no,,,
They DO However put them in the ceiling in some smaller buildings, if they're on a loop, or sometimes in Light Commercial they used to put in a regular split system with the A/H in the ceiling, but with new codes there are NO ceiling installations and DEFINITELY No rooftop A/H's
Mark H, Stevens,CMS cleary said in the roof. I know they dont go on the roof i meant roof void
So glad I watched the AHU video first, lol.
i want to thank the guy who translate this video to Arabic and the one who made the vid thanks both
good video with good information thanks.
Hello. I'm in NYC and just recently gotten involved with Engineering school. Unfortunately I am lost what would be the best video to start with. Iv always been more of hands on as well as videos...I'm 2 month in and lost... thanks
Well, what kind of engineering courses are you taking? Hydraulic? Electrical? Civil? Mechanical? By narrowing down what sort of subjects you've got, you're more likely to find what you're looking for.
Thanks a ton for simplifying...
great video by the way.
Well explained, thanks. :)
thank you ! very helpful.
Excellent video , thank you so mucho.
Very good. Thanks.
So what exactly happens to the chiller itself when the water cooling tower stops working? Does everything shut down automatically or does the chiller trip out on high head pressure?
Great job, very clear about the cooling circle thanks for wonderful job!
Are the condenser and chiller connected by refrigerant? Could you please explain the pressure inside the machine, are they the same pressure? Thanks so much.
+Tian Tian There will be a difference in pressure between the water inside the tubes and the refrigerant on the outside. The chilled and condenser water flow only through tubes in either the evaporator or condenser respectively, the water is completely separated from each other and the refrigerant, it just transfers it's heat through the tube walls into the refrigerant or vise versa. The refrigerant is the only fluid which passes around the inside of the machine between the compressor, condenser, expansion valve and the evaporator.
1) The refrigerant is sucked into the compressor. It's pressure and enthalpy will increase.
2) It then enters the condenser where the pressure remains the same but the enthalpy decreases because it transfers it's heat through the tube wall and into the condenser water which is sent to the cooling tower.
3) Next it passes through the expansion valve where it drops in pressure but the enthalpy remains almost constant. As the refrigerant expands, its volume increases and so it will drop in pressure.
4) Finally it enters the evaporator. The refrigerant will be at a lower temperature than the entering chilled water in the tubes. This causes the heat to transfer from the entering chilled water and into the refrigerant. The refrigerant will begin to boil and evaporate, this increases the refrigerants enthalpy but it's pressure remains constant.