How does a cars Air Conditioning system work?

Hey, In this animation I explain the basics of how a vehicles AC system works. I make reference to the pressure inside the system which is really important for the system to work correctly.
On average you should have approximately 1.2 - 2bar (17 - 29 PSI) on the low pressure side and approximately 10 -15bar (145 - 217 PSI) on the high pressure side. This is with the system running.
On a static system (off) you should measure approximately 5bar (72 PSI) of pressure on both the high and low pressure side.
In natural form the AC gas R134a is a gas and has a boiling point of - 26.5oC at atmospheric pressure.
A high pressure is used to change the state of the gas into a liquid. This is because a substance absorbs heat when its converted from a gas to a liquid.
The refrigerant circulates in the closed circuit, continually alternating changing from a liquid to a gas and vice versa. The refrigerant is:
Compressed in the gaseous state,
Condensed through heat dissipation and
Evaporated through pressure reduction and heat absorption.
Cool air is not produced, heat is extracted from the air flow in the vehicle.
All vehicle AC systems will lose some gas over a period of time and its recommended to have the system serviced regularly. I would recommend every 2-3 years.
I hope you enjoy this explanation and if you have a question please ask.
#Airconditioning
#AC
#HVAC
#engine
#howitworks
#GarageTech
#cars
#Animation

[@kennethjones2849]

I watched about 5 videos on AC --even one from a professional institution--yours is the best so far--thanks.

[@dr.yahyaelewa1628]

Strongly agree.. thank you.

[@aaronmcdonald4944]

Also checkout Donut media YT Channel. I like their animations too. this one is very well done btw

[@djecklinyprimon3705]

Can’t agree more!! Excellent explanation 😄

[@subhamoybanerjee3172]

good show, specifically because it is animated keeping all the parts in exact position of a car. that makes this video different from others. keep it up.

[@mariosugay5618]

what happened to the dryer after the refrigerant passes through the condenser?

[@hectorheath9742]

Good to see some actual temp and gas figures. Greatly helps in understanding. Thanks.

[@Silkroads733]

Great I’m a qualified mechanical engineer and auto electrical technician, and I never really knew about to much about a/c units until watching this video thanks, I’m more old scool..from the points ignition and carburettors ect ect..from the 70s..

[@miguelito9va]

Great video. Congratulations!!! I work in automotive industry and I have to thank you for sharing your acknowledge with us.

[@raquelojeda8311]

Really good video. I have always had a lot of trouble understanding the theory behind it so actually seeing the flow really helped. Thanks a lot 👍

[@DannyOh1984]

Perfectly explained. From the animations to explanations. Thank you very much! Cheers from USA

[@seinlanda5492]

Without a doubt THE BEST video about this so far, others talk a lot about details in the compressor and shit but they haven't even explained how does the system works.

[@GarageTechAutomotive]

🙏🏽

[@dr.yahyaelewa1628]

Hats lift up Professor. I love your dialect and the way you teach. You are kindly asked to hold a seminar for teachers to teach them how to teach. If it's in my hands, I honor you an OSCAR. Hopefully, your Excellency would accept my kind and deep regards. Once again, thank you so, so much. Your proud student.

[@vladdunareanu8500]

I was curious how A/C works and I found this explanation exactly on my car :)

[@BillySBC]

Very good video and explanation, as well as indicating the directional flow of the gas in the system. I am getting high pressure on the low side so I'm thinking it's probably the expansion valve now as this seems to be the place where the high pressure drops to lower pressure. Thanks again for posting this.

[@desiefiautoelectrician7150]

I watch all your videos with pleasure and learn a lot. Thank you for sharing your experience with us.

[@joenaz4311]

Fantastic video. Top tier visuals and thoroughly but succinctly explained!

[@dr.yahyaelewa1628]

I love your dialect Sir. It reminds me with my lovely British Professor .. Blessings. Once again, thank you. Kind regards.

[@coppertechnologies5051]

Your presentation is highly appreciated... Thanks for the work

[@joelsagayanatan2325]

U made it to understand very easily , while comparing to other videos .. thanks 👏

[@bridew]

Wow, after many videos finally one that explains with the actual numbers... Thanks

[@user-kq6ky5tz7v]

the best "How does it work? " I've ever seen thumbs up

[@aniketdeshmukh836]

I have never seen such a big mistake in explanation. Gaseous refrigerant is entering the evaporator instead of liquid refrigerant.

[@IronWarrior95]

@@aniketdeshmukh836 he said gas enters the evaporator, not liquid. But as I read, his mistake is, that it actually is liquid when it enters the evaporator and cools the air down. A liquid cooling air down sounds more effective than a gas cooling air down. And then on its way back when it gets warmer it gets into gas again. I'm actually not sure about it right now.

[@pgm7035]

Best a/c demo.

[@alizainsomani1127]

Great video well explained and easy to understand with animations and placements of the AC components

[@MrMagsimus]

Fantastic video to break a complicated process down into lay mans terms and deliver excellent commentary 👍🇬🇧👌👌

[@tylerharper9376]

Thanks for the video! Really comprehensive.

[@dr.yahyaelewa1628]

Hats lift up from America to you Sir. Thank you so, so much. Kind regards Sir.🎓

[@marvinfollero846]

props to the animation. great work

[@pufarinu]

fascinating animation/explanation !

[@relaxationclub3848]

Very straightforward explanation. I feel intelligent now 😅

[@junkitlow]

Very detail explains, great knowledge

[@abdulsamad-oz4lw]

Good illustration how it work. Now i can clean my coil with coil cleaner with confident.

[@CASP_ian]

One small correction: Dryer is used to remove any unwanted water (or water vapour) and also acts a filter. Water vapour is really bad as it freeze in expansion valve causing starvation.

[@godwin7733]

I was watch so many videos but i can't understand anything about Ac working. But your video was awesome . Very knowledgeable animatic explanation. Very Good 😍😘

[@theSilvioRoesler]

Such great video, thanks for putting this together

[@garirclinic2020]

The best video on ac ever in my opinion ....thnx

[@solidworksegscorporatetrai3983]

Great Video of Technically Published about an inside mechanism HVAC System of car. Very Useful...

[@muneerlyati]

thanks so much, excellent explain and presentation

[@mkumar9613]

good explanation man.. keep doing more work like this!!! Great job

[@msa0435]

Very nicely explained.Great job.

[@anasrauf5854]

What a video … simply marvelous expalanation❤

[@akupehsluarketatAR]

meanwhile in mother russia, the weather cools the a/c system

[@teravolt6113]

I wonder how many people in cold weather countries such as Russia (or Canada, Sweden, Finland...) get seized compressors for not being able to run AC for long long times...

[@anonymousfuck9320]

TeraVolt Not all cars automatically turns of the ac so in some you can have the ac on

[@infinitewisdom4557]

Yep, conventional A/C, in reverse!

[@domisualk6122]

And the Motor warms the Person... the co2 warms russia so everything OK.

[@LuciferMorningstar-ix3lb]

@@teravolt6113 they turn on the heater

[@prak44]

Very good explanation.

[@gantasaala23]

Thank you sir u briefed clearly how the car ac works

[@majidm6007]

Fantastic explanation, thank you.

[@prashantjagtap_17]

I learnt it was way back in 2014-15(engineering days)....But that time I was confused regarding this topic, finally I got the solution... The way u r explaining pressure & temp. at perticular point is just clear all the daught. Thanks

[@NishitShukla]

All Indian engineers are like you, they pass exams without understanding much, the system is such.

[@prashantjagtap_17]

@@NishitShukla Right. They only focus on how to get numbers.

[@NishitShukla]

@@prashantjagtap_17 My father was B Tech Mechanical, he retired as Chief Engg, Damodar Valley Corp, ran a 780 MW plant, but I don't think he knew how the thermal power plant ran. 😁😄. I am into Economics, even I don't understand how the economy works😁😄

[@prashantjagtap_17]

@@NishitShukla 😀 Ok. This month I got selected in Johnson control as a design engineer, and the main product of company is HVAC, so I suppose to know all things about that so try to learnt this after selection 😅😜

[@NishitShukla]

@@prashantjagtap_17 Good luck man😁😄. I am confident that you will never be the one to invent fb, twitter, google or for that matter anything that can be called invention. The last major invention from India was lavan bhaskar churna.

[@malikmalik0216]

Thanks dude 🐸 for the quick knowledge

[@Adikxx]

fantastic vid, really well explained

[@rogerhamberg1266]

Thankyou for busting my hearing after the end of actual video.

[@Imjeevabharathi]

Extraordinary bro

[@normalkullanc1993]

Nice and clean thank you

[@allseasonadventures5124]

Awesome job man, thanks

[@mrddurian3453]

Thank you for the great video, it helped me a lot. 👍

[@ign4304]

One of best video ,understood at once .tks

[@jasonalcide8478]

this is the first time im really understanding wats it all about ....tanx

[@joepapa52]

Very good info, thanks and keep it up

[@MrPandoratomorrow]

Great video need more like this

[@jitender247]

Detailed explanation about the gas pressure and temperature at various points , thank you very much for that dear friend

[@devanandkunduru4560]

That's awesome explanation

[@tozguitar]

brilliant explanation

[@pkasb90]

Wow GarageTech what a superb video.

[@naderachkar1231]

amazing video ....thank you

[@rizwanbarakba5181]

Good job friend you explain nice and I hope everyone will understand because this way you were told and the video clear and it’s educate easily

[@jrno93]

Amazing engineering

[@lynbooth1431]

Thank you, Thank you, Thank you.......It all makes sense now.

[@chiragdoshi762]

good animation ac system works

[@zulkiflyhjali5142]

This is very good tutorial... Thanks👍👍

[@bunnatang]

your voice is too low. but music is like a thunder.

[@hegotaspare]

Yeah don't forget to turn the volume down after he's finished or you/I will jump.

[@CL0WN]

@@hegotaspare I was prepared and still jumped wtf us that sound design .

[@NAaPALM51]

The guy: I’ll put music at the end 🥁🎸😋 Me now: 🧏🏽‍♂️

[@niallenglish3777]

Nice 1. Told me exactly wha I wanted t know, and jus had t watch 1 time. Good on ya

[@supdream8979]

A little technical but I got it how it works great explanation 😃

[@hakeemzahardi9207]

well explained!

[@ChadTvFun]

Very good video, very educative.

[@samforcez]

This video is great!

[@swapnilbandgar8730]

is there any arrangement to keep compressor speed constant or is it directly driven by engine and its speed varies in proportion to engine speed?

[@ManojKumar-hz1vx]

Good review

[@csb8930]

Good explanation

[@Zumaray]

Can I ask what program you used for the animation? It's really good.

[@hamedal_obaidli5532]

Hi Mr. , can I know lowering the Glass wail ac is on will effect the ac?

[@nosajonardep9068]

Fantastic.

[@AndyShrimpton-GaaTech]

Thanks for the video

[@nasapayrollsystem8701]

At the expansion valve , it doesn't boil the liquid to make it a gas . The physics is , if you suddenly compress a gas it will generate heat .. (Compressor) If a gas suddenly expands , and hence drops in pressure it will cool down, enough to make ice. If you open a valve at the end of a Compressor tank , as the compressed air leaves, and expands you will feel the metal outlet getting colder , and it may form ice , depending . This is also only the cooling part of the A/c .... The gas expands , drops in pressure , as you mentioned , and this is the cooling effect , its transfer of energy really .. a full system would include that as the warm air is cooled over the evaporator, It cannot hold as much moisture . Warm air holds more moisture than cold air , this will reduce the dew point and water will be separated from the air. Resulting in cooler dryer air. This water can be dumped out the bottom of the vehicle.. Don't freak out if you have water dripping from underneath your vehicle after a journey on a hot day , with the A/C on ..it's just this condensate being dribbled out

[@nasapayrollsystem8701]

Im probably being a Twat pointing that out though ...😒

[@Redtooth75]

Its both. When the refrigerant vaporizes it absorbs a lot of heat to do so. Something vaporizing is a endothermic process that absorbs heat. Thats why we sweat, the water on our skin evaporating absorbs heat from our body.

[@mechanicalengineeringpract140]

Good explained

[@kensonmalupande2424]

Well explained

[@NASER725]

Thank you so much

[@vin605]

Very informative thanks

[@OfficialDjSideAffex]

Great video

[@sayedabdullah5154]

Thanks alot simple and easy

[@e90vi]

great video!!

[@CHIBA280CRV]

That is a Fantastic and simple explanation of how the refrigerant works in a compressed state.. what I can't seem to find is a video explaining how the electronics side of the system works ? Like what happens when you push the a/ c button on the dash ? Sends a signal to what and what pressure sensor those and fan clutch closes etc. ... Which intern leads to the video you just presented.. thanks I hope you have a video on it , and if not would you make one ? It's good to understand how the whole A/C system works. I need to know in order to try and repair my 2007 Honda CR-V a/c system .. I need to understand how it works from when you push the button.. Sorry for the long comment. Thanks again.

[@MacsWraps]

Thanks! Much obliged.

[@MC-ph7gr]

Does the a/c clutch stay engaged all the time when the a/c is on and the car is working on park gear on idle (Altima 2010)? Thx

[@DrDIY.]

Does insulating the pipes between the compressor, the condenser and the evaporator help in the over all efficiency of the AC ? I am asking this because my car has these pipes insulated at some sections and not insulated at others.

[@likithdeekonda8209]

superb sir

[@aimsats8292]

well explained

[@drona311]

great help...thanks mate!

[@juniarmaramara1193]

Good video my brother thanks for explaining. What cause my car to cool on highside from receive dryer to expansion valve. Can you explain to me brother.

[@gabrielv.4358]

How does the compressor handles high rpm's? Does the valve lets more fluid flow, or does the cooling fan from the radiator helps it maintain a steady pressure inside the system? I know it has 2 modes, the normal and the max speed fan. Will it cool more if I maintain the engine at higher rpm's too? Thanks!

[@jagannathan5956]

Can you also please help us with the powering system to the AC? Is it only the compressor fed by the engine ?

[@A-DUBCLUB]

Quik question. My ac comp blew last night.. it wss seized wks ago and wen i ran the heater on a cold day it just gave way.. started with metal scrapin noise followed by a pressure burst then gave way and spun freely.. well thats how it sounded.. my question is.. i have a same spare parts car.. its identical.. am i able to use it? Wat else do i need to do.. this is for a 2004 audi a4 1.8t b6 quattro s line model.. plz help. Thanks

[@vijaypm9732]

Thank you very much!

[@sagarpn3162]

Very good.

[@akstarkids]

Good information 👍

[@MrXxxvincentxxx]

good explanation give you liked !

[@lucaalessandrini3765]

Hi! Can you tell me at what speed the gas are traveling inside the tubes system? THX!

[@venkatakrishnakishorepasum6324]

Good explanation..