Understanding Tesla's Heat Pump System
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- čas přidán 21. 05. 2023
- Discover the remarkable heat pump technology integrated into Tesla Models S, 3, X, and Y from 2021 and onwards. Find out how to identify if your Tesla vehicle has this system and gain insights into how it harnesses heat from 16 distinct sources to warm up the cabin, battery, and powertrain electronics.
Use my Referral code link to purchase a new Tesla ts.la/john304015
POST-VIDEO ADDITIONS:
1. The system's A/C compressor is a high-volume Denso 41cc, while Teslas equipped with a PTC cabin heater use a Hanon 33cc A/C compressor.
CORRECTIONS:
1. I sit corrected regarding the six Electronic Expansion Valves (EXVs) of the supermanifold. They actually utilize precision stepper motors instead of pulse-width modulated solenoids. I appreciate Engineerix for pointing out my mistake.
TIMELINE:
0:00 Introduction
0:46 Cabin Heating Method 1. The PTC Coolant Heater
3:30 Cabin Heating Method 2. The PTC Air Heater
5:07 Cabin Heating Method 3. The Heat Pump
6:45 How to determine if your Tesla has a heat pump
7:25 The advantages of using a heat pump
8:26 Coefficient of Performance (COP)
9:55 Operation above 10 degrees C (50 F) with 16 different heat sources
11:15 Heat Source 1. The Cabin Condenser
14:23 Heat Source 2. The Blower Motor
15:51 Heat Source 3. The Radiator
18:46 Heat Source 4. The High-Voltage Battery
19:50 Heat Source 5. The DC-to-DC Converter inside the Power Conversion System
20:48 Heat Source 6. The Onboard Charger Converter inside the Power Conversion System
20:48 Heat Source 7. The Autopilot Computer
22:58 Heat Source 8. The Chiller
25:43 Heat Sources 9 and 10. The Front and Rear Drive Unit Inverters
26:58 Heat Sources 11 and 12. The Front and Rear Drive Unit Stators
28:52 Heat Source 13. The Cabin Air
30:18 Heat Source 14. The Liquid Cooled Condenser (LCC)
33:19 Heat Source 15. The Air-Conditioning Compressor
35:03 Heat Source 16. Hot high-pressure vapor recirculated into the receiver dryer through a mister.
37:11 Operation below 10 degrees C (50 F) with 6 additional heat sources
37:30 Additional Heat Source 1. The Air-Conditioning Compressor operating in Lossy Mode
39:00 Additional Heat Source 2. The Blower Motor operating in Lossy Mode
39:27 Additional Heat Sources 3 and 4. The Front and Rear Drive Unit Inverters operating in Lossy Mode
39:58 Heat Sources 5 and 6. The Front and Rear Drive Unit Stators operating in Lossy Mode
43:22 Understanding the coolant side and refrigerant side of the supermanifold.
43:40 Visualizations of all four modes of supermanifold coolant flow in Service Mode.
44:08 Visualization of the supermanifold refrigerant flow, pressure, and temperature in Service Mode.
44:50 The basic air-conditioning refrigerant loop and the supermanifold.
47:34 The three pressure-temperature sensors.
48:40 The Receiver/Dryer/Accumulator with a desiccant bag.
51:02 The three one-way refrigerant check valves (Evaporator, LCC, Cabin Condenser (CC)).
53:00 The six electronic expansion valves (EXV) Stepper Motors (Chiller, Evaporator, Left CC, Right CC, LCC, Recirculation).
56:26 The LCC Shut-Off Valve Solenoid (On/Off)
58:04 The Chiller
58:38 The Liquid Cooled Condenser (LCC)
59:36 The components of the coolant control portion of the supermanifold.
1:00:35 The two coolant pumps (HV battery and Powertrain)
1:01:50 The octovalve
1:03:01 The coolant flow in parallel mode through the octovalve.
1:03:50 The coolant flow in Series Radiator Bypass mode through the octovalve.
1:04:31 The coolant flow in Ambient Source mode through the octovalve.
1:04:56 The coolant flow in Series mode through the octovalve.
1:06:48 Connecting the two sections of the supermanifold together
1:07:58 The coolant Reservoir
1:09:45 Heat pump summary
ABOUT US
Weber State University (WSU) Davis Campus - Automotive Technology Department - Advanced Vehicles Lab. A technical description and operational demonstration of the Tesla heat pump system.
We teach current vehicle technologies to our automotive students at Weber State University and online. For more information, visit: www.weber.edu/automotive
This video was created and edited by Professor John D. Kelly at WSU. For a full biography, see www.weber.edu/automotive/J_Kel...
Visit my other youtube channel / vibratesoftware to see the amazing NVH app for vibration diagnosis!
ADDITIONAL TRAINING FOR YOU
Join us for hybrid and electric vehicle training with two online courses and then a 5-day on-campus boot camp with Professor John D. Kelly. See www.weber.edu/evtraining
DONATE TO OUR DEPARTMENT
Please consider a donation to the Department of Automotive Technology at Weber State University here: advancement.weber.edu/Automotive
I wasn't planning on watching an hour of heat pump content today, but your presentation style is brilliant! Thank you for your work!
Yes, he has a great voice and sound quality.
Thank you very much!
I wish I had more Professors like him at university! I can't believe I just sat through, listened to and understood 90% of everything in that video!
@@farmerfarmerer3847great way to learn while you fall asleep lol
Some might find it boring and slow but I've watched a lot of this guys videos and even though I have little interest in EVs, the info and depth is great and he's obviously passionate. His students are luck as f*ck and I hope they know it. Plus props to anyone in a wheelchair who manages even 1/10 what this guy does! ❤
I am an HVAC engineer for almost three decades now. I can assure you, this system is sophisticated in terms of design/compactness. Even more impressive is, that it seems to work without problems. The design engineers did a great job!
Great job also from the Professor, fantastic presentation.
Thank you very much!
He's winging this...................just kidding.......most thorough insight I've seen on this system
I am really happy to find a professional here. Can you tell me how does it work? You have condenser as heater 😮 in the winter is ok but in the summer you have evaporator and condenser in a pack! So how the procedure is done.
@@zabanfannikhodrotfcvvc tv DC 9
@@zabanfannikhodrohe system has two condensers (and two coolers) one in the cabin and one attached to the liquid system. A refrigeration compression cycle has always a hot and cold site. The real ingenuinity in Teslas system is that they are able to move heat and cold arround in the system (as refrigerant or liquid coolant) as needed in a very compact way. There is a drawing out there showing the piping.
WOW! I have been a HVAC service engineer since 1976. My instructor was brilliant. I have not watched any other instructor discuss a HVAC system so amazingly, in almost 50 years! YOU ARE BRILLIANT! I hope your students appreciate you.
You even admitted to a mistake that wasn't really a very important issue, because in your presentation regarding the electronic stepper valves, you clearly said that they are four wire " modulating" valves.
It takes a great and honest person to admit they have made a mistake, especially on a public forum. A modulating valve and a stepper valve do the same thing, but the stepper valve has digital accuracy.
You have amazed me with the engineering that went into this. But the bottom line here is how clearly the information was presented. It is very clear that you are passionate about your subject matter. AND it is very clear that you love teaching. Weber State is very lucky to have you! Keep up the great work! Have a great day.
Thank you so much Bob!
Always a good day when a Prof. Kelley video goes up!
Thank you very much!
Agreed. Always great content in such a relatable easy to understand way. Signs of a great teacher!
He teaches without any graphics and it’s amazing. Do like this format of learning.
As a senior citizen and new Model Y owner, this video is a revelation. I now even better appreciate advanced engineering. Your explanation is clear and concise. Thank you for your valuable public service, and a good instructor is priceless. Your students will benefit for years to come. I wish I was younger. LOL.
Thank you
These are the types of videos I have been looking for! I am thinking about a Model Y, and we all have seen the performance and tech videos, but to see how they tick is is awesome! They seem to be mechanically simple with very few moving parts compared to gas-powered cars.
@@deranged731check out Munro Live
I like the muffin pan. 😊
This is superb engineering. Why do Americans are proud of German engineering and buy German cars? Those days are gone. Which car manufacturer in the world could came up with this design?
This is American ingenuity.
Thank you professor. Your work is awesome
I love his low key reactions while he explains this ingenious system. He doesn’t verbalize it, but you can see he’s like “see how smart this is?!”
Wow, I had no idea the extent to which Tesla's heatpump system cannabalizes what would otherwise be simple waste heat from various motors and circuit boards. Thanks Professor for shining a bright light on such an impressively efficient HVAC system.
Thank you!
Wear your long under wear when driving your tesla take your ice scrapper .
@@s.j452 I've now driven 2 Teslas through 2 long Michigan winters and can testify the cabin heating system is superior to any ICE car I've ever driven. Warm-up time is fast, heat is hot, window defrosters are efficient. No need for long underwear.
@@lenpalmeri6228it cant be better than an ice car as it cant produce as much heat but for the electric cars its very good and efficient.
@@K0nst4nt1n96 It can produce as much heat as you want and it warms up the car much faster than an ice car. You start turning down the heat after 5 minutes or so. Yes, it uses the battery but when warming up the car before your departure, it will take power from the house. It's nice to have a warm car before leaving.
When I worked at Tesla, I pleasantly surprised many of the technicians with my general knowledge/understanding thanks to you. You allowed me to confidently explain concepts to customers and even staff. Keep it up ❤
You had an amazing job, why you left the company?
@@Iqtidar Their working conditions isn't always the best, and they're very anti-union.
@@swecreations Nonsense FUD
Workers are free to form a union. They prefer cheap stock options.
3.6 million applicants last year.
Some people just don’t fit into Tesla culture. No problem. Just leave like the OP was wise to do.
@@waynerussell6401 No, they are not really free to form a union. Not at Tesla anyways. Musk is VERY anti-union. * I'm not saying that all unions are great, or even good. But there is ZERO opportunity to form one at Tesla.
@WeberAuto: John, minor correction on the "solenoids", they are computer controlled stepper motors. The stepper drives a rotor connected to a screw that can move the plunger in and out by super precise amounts. The term for the whole assembly is an EXV (Electrically-controlled eXpansion Valve). As the name implies, this is where expansion (pressure drop) takes place in the system. The advantage of the stepper driven system is it's more precise, and the computer can determine where the plunger is, so it doesn't need feedback. When you first power up the car, and at some other times, the steppers will "home" (run into the end-stop) so the computer knows the exact position. The computer in this case is called VCFRONT. (The front Body controller)
I was wrong. You are absolutely correct! I should have looked at the schematic. It specifies the stepper motor circuits at each location. Thanks for the feedback!
@@WeberAuto Do be clear, they are not solenoids. They are stepper motors.
Not only is it more precise but also more efficient.
@Ingineerix I think in automotive, solenoids are so common that it becomes a ubiquitous term for inductor. So, since a bipolar stepper motor schematic consists of two inductors, each motor looks like two 'solenoids'
Thanks for that additional information Ingineerix! That explains the four way electrical connectors. Regardless, I am very impressed with Prof. Kelly’s knowledge of this complicated system, and his acknowledgement of your correction. He really does his research on how systems work, and can explain them to students clearly. Very important skills for any prof, and it is rare to find ones as good as it as Prof. Kelly.
The amount of thought that went into the design of this system is seriously impressive. That they even thought using heat from the AC-DC converter in the charging unit - which isn't even used while driving - is absolutely nuts (in a good way).
Probably more impressive to OEMs would be how many radically different engineering groups had to work together to get all these systems to contribute.
Thanks for watching
But VW also does it?!
@@abraxastulammo9940
I've read that they offer a heat pump as an extra to the normal ac system in some models.
Not all implementations of a heat pump are created equal, but I don't know anything about VWs usage so I can't explain the differences. But I doubt its as optimized and integrated as Tesla's (otherwise we should have heard about it)
Everything is liquid cooled in current gen Teslas and can be directed any way in within the system. Even the onboard autopilot/entertainment computer, which only draws/outputs a maximum of about 150W! I am not aware of any other car that does that. 150Wh is what driving one kilometer takes, so you run the autopilot computer for 24hrs at full speed and you could gain 24 kilometers. It really emphasizes the significance of it.
What would be unbelievable for LEGAs is that "radically different engineering groups" could work together. Ask Franz von Holzhausen what it was like to work on a different design at GM, where other designers worked to sabotage "his" project. Saboteurs never considered the damage they were doing to the company that paid them.
This is by far the most comprehensive, and understandable for non engineers, review of octovalve i've seen. Every video I viewed on this Weber CZcams has been outstanding. Thank you so much for exceptional content. I hope you and your team will keep up the good work as much as you can. Be well take care
Thank you John!
It is an older tech that has been used before. Maybe not as extensive but then again tesla had a serious problem with heat management so they had to do something, other manufacturers deal with heat in different ways and do so relatively well.
I'm an HVAC service technician, just fished my day. And stuck watching this for an hour... haha, great video. Thank you
Lol! Thank you for watching
Thank you & I thank your school for these informative videos. They are great for pointing people towards when discussing how things work & making us less concerned about the reliability of these newer vehicles & systems.
Thank you very much!
So awesome that they share all this with the public. Plus I'm sure these videos are great for his students as well, just make them watch this stuff and answer their actual questions while he can focus on learning and making more content instead of giving this exact same lecture everyday over and over to different classes which is probably how most teachers get worn out and lose their passion anyway.
@@forbiddenera Correct, it is a lot of work to set up (and clean up)a demonstration like this. Videos also allow for homework assignments with quiz questions.
@@WeberAuto Keep up the good work! You're students are lucky to have you!
Kelly, I had to pause half way through to thank you for your ABSOLUTELY AMAZING video which demystifies and shows the brilliance of the Tesla heat pump system! NEVER have I seen such a well laid out workshop nor video presentation before, except of course on your channel! You should teach Monroe & Associates how to do it (and I love them too).
Thank you very much!
I agree ... but it's Munro ...
As a Tesla certified structural auto body technician, thank you! I find myself watching a lot of your videos! They help me in breaking down the systems and knowing how all parts interact with each other! I wish Tesla did a better job at explaining these details like you sir! Thanks again!
Thank you very much!
Your presentation is what glued me to watch an hour of heat pump education. I am a retired civil engineer but if I was a young man again, I want to be in your class. Thank you.
Thank you
Glad to have you back Professor! I've heard about the heat pump, octovalve and SuperBottle but your step-by-step explanation brings it to life. Every EV company needs to copy this design immediately!
Heat pump and heat scavenge has been used by other EV and hybrid vehicles for years. Ford did it with the Escape Hybrid before Tesla was even in the picture.
Thank you very much!
GM already did. Who knows if they are better. No evidence if the Tesla setup is actually better in real life over time - they were dumb enough to harvest outside air when it was near freezing when they first came out, clogging the front bumper with snow.
I'm not an engineer. This usually bores me. But since I own a M3 since 2018, I was willing to listen for maybe 10 mins. The clarity of the voice and explanation just basically hooked me to several more mins. Anyway, great job professor. Weber and its students are lucky to have you. Also, now I know why the legacy automakers are years behind Tesla.
This guy has what seems to be an entire tesla marked everything clearly named with yellow stickers and even a cutaway drivetrain! What a fantastic setup! Also the video is great, but just wanted to point out some fantastic setup he's got here. Any student of this guy is really lucky👍🏻
This video series should never stop this Professor and Tesla are a match in heaven :)
Thank you!
I admire the depth of the engineering design! These detailed explanations make you appreciate the thing more fully. With this knowledge, you realise that what you have in front of you is not just a pretty wrapper, but a masterpiece of elegant engineering.
Exactly! Thanks for watching
Tesla likes to promote every little bit of engineering improvement they make, and i think it is great for us as viewers to see it. Others have the same abilities it is just a matter of cost and importance of recouping very small amounts of heat, you eventually get to the point where you have to release that heat into the air.
The Mister is a method of taking the most lossy places and re-capturing that heat. Rather than allowing it to escape the system. Smart.
Thanks Professor Kelly for running us through this complicated system. Something that you alluded to during the presentation was COP, which can drive an AC system in such a way as to be more than 100% energy efficient, which is the bonus of using a heat pump system over a PTC heat system for automotive climate control. Efficiencies of 400% are possible if temperatures and demands are tweaked, which makes a heat pump - in an automotive application - an amazing device/system.
Agreed! Thanks for watching
I can hardly believe how much interesting stuff
there is to learn about EV technology.
I'm not super interested in this, but the presentation & info is so good,
I'm watched the whole thing.
Awesome! Thanks for watching
Professor Kelly! Very, very cool, and very, very warm! Exemplary teaching sir! Logical, concise, clear, thorough! You are very much appreciated.
Thank you very much!
Many thanks Professor for this superb explanation! It's indeed an excellent system from Tesla, but as complex as it is your way of laying it out plain and simple makes it easy to understand. Please keep doing these fantastic videos, because I have been learning a lot with you!
Mate, I'm French and English is not my mother tongue, I learnt it first at school and then on my travels and now in my work and by watching videos like yours, etc... But your explanations are still crystal clear to me and captivating! I also love the enthusiasm in your eyes and smile, we can tell you are very impressed with this product and I understand why. I've had my Model Y since last December and after watching your video I'm even more convinced that I made the right choice, and that this Model Y is probably the best car ever built (maybe it's been beaten by a truck now... who knows ^^).
Anyway, thanks for this jewel 🤩your students are lucky to have a teacher like you.
Thanks to Weber Auto for producing this informative video and posting on CZcams for all to see. Prof. Kelly does an amazing job of clearly explaining such a complicated and capable system. I highly recommend anyone who wants a job as a auto technician to consider attending Weber Auto for their education. Tesla’s system sure is a masterpiece of flexibility and efficiency, transferring heat from anywhere to anywhere while also eliminating redundant parts.
Thank you George!
I have been waiting for this video!
The additional heat sources (below 50F) for the heat pump system answered a question I’ve had regarding our 2022 Model 3. My spouse drives it every day to work (40 miles in each direction) and I have an app to monitor vehicle operations, including efficiency. The Model 3 is relatively unaffected by weather conditions compared to many other EVs, until the temperature gets low. I notice it more when the temperature is below 40F, the efficiency drops like a rock. It will get 4mi/kWh typically at 70F and maybe around 3.6-3.7mi/kWh at 50F, but it will drop to 2.8-3.0mi/kWh at 32F. It makes sense now why that is…the heat pump system is having to effectively “waste” energy to create heat for the cabin.
My Ioniq5 has a combination of heat pump heating and a PTC air heater. It uses the PTC heater to provide immediate heat on cold days, then transitions to the heat pump once it has a chance to gather some heat. It also is capable of gathering heat from the front/rear motors, the battery and the power electronics, but in a much less complex (and overall less effective) way. However, to the vehicle passengers, the system actually works better than the Tesla system. The vehicle receives heat much more quickly, especially on very cold days, and it is also way more effective at defogging the interior. It can run the PTC air heater for heat and the AC to dehumidify without having to sacrifice one or the other like the Tesla does. I’ve had several instances (especially after supercharging) where I’ve had to wait for several minutes for the interior glass to defog since the heat pump system is trying to heat the interior, dehumidify the interior and cool the battery all at the same time.
Interesting, I really haven't had those issues with mine. However, I don't supercharge too often. You'd think heating the cabin wouldn't be an issue since it's trying to reject all that heat from the battery anyway. Unless it can't spare even a tiny bit of cooling capacity for dehumidification... But bringing in cold OA and reheating in the winter should be plenty dry to defrost. That's been my experience. Unless your winter means hovering around freezing. Our average Jan/Feb highs are only in the low 20s. I get cabin heat almost immediately even after it sits outside all day. Faster than a gas car for sure. Although I usually "remote start" a couple minutes before I leave.
I've been supercharging in February at -15C and never experienced what the other guy is saying.
@@sylvaing1 You won't have it at those low temperatures as the air already is bone dry when heated from -15°C to +20°C. The issue is more likely to happen when the outside air is warm and moist but still cool enough to condense vapour on the windscreen. Then it needs to be cooled down and reheated. That's when the cooling capacity of the system gets to its limits, and it prioritises the battery, as that can actually be damaged from excessive heat, whereas the passengers and windscreen (of the stationary car) won't take damage from moist air.
Chevy Bolt defogs window in 20 seconds.
Great information, thanks for sharing!
Wow! That was fascinating and explained so clearly and fully, its obvious you are a tutor and a very good one at that. I simply wanted to find out how to tell if my late 2020 model 3 had the heat pump or not, so could've checked out after 7mins but I was riveted by your presentation and watched the whole thing. Thank you for sharing your knowledge.
I learned a lot of in depth elements of the Tesla heat exchange system. That lossy manager was a surprise heating source as to not need an external dedicated heat source. Brilliant. Excellent presentation!
Incredibly complicated yet simple system and as always explained in extreme detail in a simple format. Thank you again Professor Kelly.
Thank you very much!
Mind-blowing detail (as usual professor) this summarizes all the thousand videos on the topic, with one precise and easy to understand video 👏
Thank you very much
Wow! I'm at half of the video and had a lot of pleasure watching it! You're doing a great job and I can tell you're kinda geeking about it haha! That makes it more interesting. I can't wait to watch the rest of the video
You are the best instructor I’ve ever listened to. Thank you so much.
Thanks for this great informational video. I’ve worked in the HVAC field for a number of years and I am very impressed with the super manifold design. The combining of several components which are typically separate and remote from each other is quite ingenuous. Kudos to Tesla engineers.
Agreed! Thanks for watching
Thanks for the subtitles! Great content. Hugs from Brazil.
You are welcome!
Excellent easy to understand demonstration from an experienced instructor. Well done John
You do an amazing job explaining the function of this car's heating/cooling heat pump system. Rube Goldberg would be proud of the engineering in a Tesla. Thanks!
Two times brilliant.
One for the designing the heating pump system.
Next one for explaining the heating pump system 👍
Thanks John, for your time and effort it's highly appreciated ❤
Thank you Allan!
What a fascinating deep dive! Thankyou so much. Very insightful into Tesla's relentless drive to gain every ounce of efficiency while using less. Your explanations and knowledge of their systems is remarkable... and your ability to explain to laymen like myself is very much appreciated. I have seen several videos previously about the 'super manifold' and knew it "somehow" captured sources of otherwise wasted heat energy and range. But this video of yours showed exactly HOW in such an easy to understand way. I was literally glued to my seat for over an hour while looking at heat exchangers and manifolds.
Thank you so much!
Thank you very much for the way you prepare and give your classes, with you I can lean anything and be good at doing.
Best explanatory presentation of the topic I've seen. Bravo!
Thanks John for showing us around and teaching us all about EV Heating systems and including the Tesla Heat Pump System. It's amazing to see the level of engineering!
You are very welcome, thank you for watching
Wow, I just geeked out for over an hour. Your presentation is so calm and professional. You present a complex system so anyone can understand it. What a fantastic video. Thank You.
Thank you!
What a great video John, probably the best video I have seen on YT in a long time. I wasn't planning on watching this but it was presented to me by the algorithm and as usual, I went down the rabbit hole. Thank you!
I am just astounded that this quality of information is available for me to geek out on. Wow....just wow.
Thank you
Professor Kelly is a "knowledge hyper charger". Amazing one-of-kind teaching skills! Literally excellent! 👍👍
Thank you very much!
Again a very educational explanation. Being smart is one thing, but being able to transfer that knowledge in another ones head is true genius. Thanks so much for that.
Thank you!
Wow, such an mazing video. So well put together and helpful to understand the system. Shows how much effort Tesla put in this system.
Thank you!
EXCELLENT presentation style, hard to stop watching!
Excellent job John! That is an amazing vehicle!. You have a lot of work ahead of you teaching our kids!
Thanks 👍
Superb! I have been hoping to learn more about the Tesla heat pump and manifold design as I had thought I had designed a similarly efficient system for the Trellis Transit 4-passenger pods. Now I can clearly see nuances in Tesla’s design that are truly inspirational. Thank you so very much for sharing this video - sincerely appreciated!!
Thank you very much Steve
This video(and any other videos) on this channel should get all the credit they deserve. I have now watched this video three times including one time with my dad who’s also into these kind of things. Your style and way of explaining things is remarkable and I’ll probably watch this video again to understand what my Tesla is doing to keep me warm. Thank you😁🙏🏻
great presentation. I'd have to watch many times to full digest this but very much appreciate what I learned here. Thank you!
Professor Kelly, great to see you back and with a great engineering analysis of the heat pump on Tesla's!!!
Thank you!
Это инженерное искуство! Верх энерго эфективности! Спасибо за Ваш труд.
Спасибо
Absolutely hands down I appreciate everything you are doing it really helps us understand what's important about this constantly changing technology. Your knowledge about this simplistic and technical matter is astounding I wish I would have had teachers like you . Keep up the good work
Thanks for this Prof. I've owned 3 different Teslas now since 2018. My first was the 18 Model 3 which had the resistive type heating system. I've since traded it for a 23 Model Y with the heat pump. I also have a 22 Model S with the Heat Pump. It's nice to understand how my car's heating systems work. And I might add, they work great. I love getting into a warm car on a cold day with just a few minutes of preheating the cabin.
Didn’t think I’d find this video so fascinating. That super manifold is an engineering work of art. I have a new appreciation for EV engineering and technology. Only makes me want to learn more. Thanks!
Thanks for watching
John, Great job on the tutorial as always. You are a great professor! Your explanation of things and detail is very thorough. Weber should be ecstatic to have you on their staff.
Thank you very much!
Excellent video. Thanks for uploading this video!!
Asides from learning a lot about heat management, I also learned about Weber State University, to which my son has been invited but wouldn't have considered until he saw this video :-).
Your channel is such a gem, keep up the fantastic working 🙏❤️
Thank you very much!
Fascinating, Tesla should link to your video when they advertise the super manifold. Now i understand how it works!
Thank you very miuch!
I've been working on cars for 20-plus years and you were the first person to easily explain why to use your AC while defrosting your windshield!! Thank you!
Thank you for taking the time to explain this.
The mister sounds like a controlled high pressure leak. In hydraulics, a high pressure leak will add a lot of heat into the system. Only they usually aren't controlled...or wanted.
This was really interesting, thanks for sharing all this info.
Thank you very much!
I was missing your videos, as always superbly done and very informative!
Thank you!
Put it simply, best automotive educational content in CZcams!
Fantastic deep dive of a brilliantly designed solution driven by 1st principles engineering. Well delivered Professor, look forward to your next lecture👍🏻
You explain in a very simple way Thank you for a very good job
Thank you
Fantastic presentation! BTW I have to say, I am super happy with the operation noise of the heatpump in my Model Y. I used to drive a Renault Zoe which also had a heatpump, but that was extremely noisy at cold temperatures, to the point that it's as loud as an ICE vehicle...
Good point! Thanks for watching
Excellent way for me to understand the functioning of my car more. I am a dentist and own two teslas MY with heat pump. I am so impressed with the tech these cars carry!
This is way more than I thought I ever wanted to know about this, so why can't I stop watching it? Exceptional presentation!
Lol, thank you!
Always good to see you, professor.
Thank you!
Absolutely banger of a video.
Thank you
I was studying and comparing heat pumps for Home Applications and came across this brilliant composition. Thank you professor for amazing, simplified and brilliant explanation to tiny details. I was not able to stop video until it came to an end. Also thank you for putting everything together in one video and sharing. Have a wonderful day!
You're very welcome!
Wow! I had NO IDEA that the Tesla heat pump system you went through was SO detailed!
Super job of going through it all! Very impressive presentation!
Great to see youback Professor 👍
Thank you!
While I knew about the super manifold and the octovalve I had no idea about the extent that Tesla has gone to when recovering waste heat. When you combine this with the brilliance and simplicity of the design (compared to other systems), you can see why Tesla is so far ahead.
Thankyou for an easily understood video. You have a new subscriber!
Thank you Mark!
Others have had heat pumps forever, tesla is just harvesting heat nobody else believes is enough to make a difference to justify the extremely high cost.
"When you combine this with the brilliance and simplicity of the design (compared to other systems), you can see why Tesla is so far ahead."
$20 you can't tell me why it's actually better. Does it have higher COP? Could it actually take less energy? Did you measure it's input vs output and compare it with any other vehicle?
I mean, better check under the hood of your car to see if yours has jerryrigged material holding the heat exchager up LOL.
@@sprockkets it’s better than other systems because it is easier to build, has less elements that can fail making it more reliable, has less piping between elements which means less weight in fluid and hoses, and less cost.
Do you want some details to send my $20 to?
@markedwards4879 no proof of is easier to build, no proof it is more reliable, when in fact driving the compressor harder and terribly to generate heat is the exact opposite, plus you ignore that repairs are HARDER.
Something that looks good doesn't mean it actually is good. This setups wastes so much heat all over the place vs Kia just generating it directly in the cabin when necessary. THAT, is the better way.
what a well structured, detailed and fascinating journey through Tesal heat pump universe! Thank you!
Looks like rocket science the whole heating system, what I think we need more research to make it easy n efficient. Thank you professor for your whole explanation. Your doing great work.
Fantastic video! Thank you
Thank you
So much effort to keep passengers and battery warm with less energy 😊 also professor, good Effort to keep us educated
And it fails in cold climates with no fix for months. Good ol Tesla trash.
Thank you very much
The best video to understand how works Tesla Heat Pump System! Thank you so much!
Thanks for watching
Another excellent video. I learned so much again. I was curious how all this worked and how it got heat without a resistance heater. I thought it must have a backup one but interesting to find out that it doesn’t. I had mine out at 8 degrees and has plenty of heat. Amazing technology.
Thankyou from New Zealand! At last we have an exceptionally clear explanation of Tesla's heat Pump System, and how they scavenge heat from everywhere and super-efficiently move it around. I would love to know how many patents they have for the whole system. I enjoyed your octovalve explanation, and realised that it works on the same principle as rotating french horn and trumpet valves. I even wonder whether the original idea came from the french horn rotating valve.
Thanks for watching. I do not know how many patents.
Amazing. Every time I see a presentation on some part of the Tesla designs I start to doubt I could ever buy any other car. They are so impressively innovative compared to anything else. Who would have thought so much thought would have gone into a cabin heater! Sadly I'm unlikely to ever be able to afford a Tesla.
My employees get one for free incl. charging, as long as they work for me. ☺️
@@Stefan_Dahn Great. What can I do for you?
I wouldn't have a Tesla even if they paid me 🙄, just imagine the problems that can go wrong with them as the stupid overly complicated systems start to wear out.
I'd like to see how much of a loss there owner's will have to deal with when they start falling to bit's.
@@stephenjones9153 ok boomer
@@chekelley6861 🤣😂🤣😂🤣Boom is what Tesla,s do 😂🤣😂
Very good presentation! Explains very well how the system works. Thank you!
Didn't even know it was over an hour. I love everything about this presentation!
Well, I always believed that this should be the way how heat management be like - collect energies wherever it is too much, and send them to wherever it is needed. Feels great to see that tesla already did it. Hope that more EV cars will do the same way. Btw, great demonstration with every details covered, Thanks!
Thank you very much
Hi what a absolutely fantastic informative video I would give this video 11 out of ten . Awesome . I have tweeted about your great show . 👌🏽🙌🏾 I actually think is we got a late 2013 Nissan Leaf with heat pump . Set to 16c see how long to get to this temp and electric used . And say set car to 21c inside and then see how long to reach this temp and how much electric used . And do this with ten cars this has never been done would show a lot of oem’s up but show the public the difference’s over the years I know it’s a masive job to do this but this would get hundreds of thousands of view as / millions I recon ♻️💡🙏🏾🙌🏾🤞🏽🤞🏽🤞🏽🤞🏽
Kyle Conner (Out of Spec) ran a test comparing the resistive Model 3 with one with the newer heat pump.
Thanks for watching
I work in hvac, this was a fantastic video. Great breakdown, they aren’t wasting any available heat.
Thank you Joseph
Thank you Weber State and Professor John for providing this superb content.
Thank you very much!
Great video as always! Could you expand on how the motors are driven in an intentionally lossy manner? I’d love to see oscilloscope traces or something, comparing to normal operation.
Thank you! There may be many different ways, but a phase shift of the AC current versus the voltage would decrease the "Power Factor" and generate heat. See www.fluke.com/en-us/learn/blog/power-quality/power-factor-formula
Just wait till you see the bill for the traction motor burn-out replacement when 7kw was pumped through it while stationary.
EV's are a joke.
In the future, might be nice for the Professor to have top students explain different aspects of the technology.
Munro does this. It works well. It adds variety to the presentation, making it easier to stay engaged.
Thanks for the feedback
Wow, thank you so much for the heat pump system explanation....outstanding job on this video....
Beautifully explained. Thank you.