Air Conditioning System Basics hvacr how does it work

How do air conditioning units work? Air conditioning system basics. We learn basic refrigeration cycle, compressor, condenser, evaporator and different types of expansion valves.
Correction:
06:08 The bulb refrigerant expands to OPEN the valve, not close the valve. Letting more refrigerant in.
06:10 CLOSE the valve, not open the valve
⚠️ Watch PART 2 here
Danfoss Expansion valve discussion: ➡️ bit.ly/3jGi0y1
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[@EngineeringMindset]

⚠️ *These videos take a long time to make* if you would like to buy Paul a coffee to say thanks, link below: ☕ PayPal: www.paypal.me/TheEngineerinMindset Channel membership: kzbin.info/door/k0fGHsCEzGig-rSzkfCjMwjoin Patreon: www.patreon.com/theengineeringmindset

[@EngineeringMindset]

@Emularis Thank you, Emularis. Much appreciated

[@PavanKumar-zh9zd]

I understand that condenser gets air flow around the refrigerant tube from atmosphere. Can you explain where does the evaporator get air from and how does the air circulate through duct?

[@michaela6147]

⁠@@PavanKumar-zh9zd Blower motor. .

[@will-cc3dx]

2nd law of Thermodynamics is one of the key concepts behind these ACU topics, this is great work!

[@DanKaschel]

This was great. I knew it worked based on the expansion of a refrigerant, but this really brought all the pieces together.

[@slipknnnot]

Best basic overview I've seen so far. Great content as always 👍

[@michaela6147]

Except he has the flow process backwards.

[@anonemoose7777]

Now I know all the basics of Air "Conditionig"! 😉😂 Great video, despite missing that one detail it covers every other detail beautifully.

[@peachpotatochips473]

Nice.... Can you make a video about lcd screen or led screen. Ive been wondering about how they really work. Its would be amazing.

[@shrin210]

Watch videos from Branch Education

[@dingdongyi5159]

The reason why liquid damages compressor is because liquid is incompressible. When a compressor (scroll or reciprocating compressor) tries to compress liquid, the liquid resists the compression. When the compressor experiences the resistance beyond its limit, it will bend or warp. I know its a pretty basic knowledge, but when I first started out, I couldn't figure it out for some time.

[@THX11380]

Every single video on this channel is AWESOME... ❤❤❤

[@sahilkadam1837]

Hello, I really thank you for the quality content you make! I'm an electronic engineering student and in these covid times your channel is a gem, which I found. I now watch your videos regularly and I am a few steps ahed of my friends, thanks to you! Keep up the good work😄👍✨

[@cengiz246]

Great educational video. Examples of the bike pump and Steam are so useful

[@CEmanified]

This is a good overview but the compressor usually discharges to the top of the condenser and the vapor will condense to a liquid in the bottom few rows of the condenser. I know the graphic looks cleaner the way it's setup but I feel like it's a little confusing.

[@Slimrooster]

Depends on the compressor!!

[@michaela6147]

You are correct and I also noticed that.

[@michaela6147]

@@SlimroosterSo what compressor are you referring to?

[@CodyDenbow]

🤓🤓🤓

[@NappyHairedGod]

I'm currently a student at a trade school studying for a career as an electrician, and i will be sticking with it, but i think i might look into hvac one day

[@windsofmarchjourneyperrytr2823]

Having more skills is always better. You get huge bonus points for knowing boiler setups. They're complex in comparison. But man, if you get a GOOD guy, who knows wtf he's doing? It's worth A LOT, because many have no clue.

[@bimbyaquino9354]

the best basic so far. thank you for this video.

[@sboss6758]

This is brilliant mate so helpful in my new job thank you

[@mashhoodzahid2189]

your lectures are fascinating. i have learnt 90% of hvac from your videos. please make video about the differences between a simple Ac vs an Inverter Ac

[@brlinrainf]

Conventional will turn on and off while Inverter will slow down and speed up Turning on and off can cause an energy surge as it tries to get against inertia. However, Inverter is active at almost all times. Only it slows down Inverter technology is also called "VRF" which stands for Variable Refrigerant Flow. There is a video from him about Variable Refrigerant Flow I have seen an air conditioner outdoor unit that has a fan rotating very slowly

[@peubie3457]

Thanks for making me understand the concept very well......

[@MANOJKumar-zo7uu]

Engineering mindset..you are amazing 😻 Beautifully explained

[@mibrahim4245]

You are a REAL engineer !! ❤

[@mileslegend]

thank you very much its simple understandable and staight to the point

[@tedlahm5740]

A great deal to comprehend. Thank you.

[@finhaskassa9363]

everything is now clear. Thank you

[@hvacexplained9341]

Very nice / simple video. Great Job sir.

[@Weird_1]

Awesome work!

[@tektonelec4695]

Great explanation!

[@jameskennett8666]

phenomenal video

[@Ted_E_Bear]

Very informational !

[@skycarl]

I'm getting the spinning wheel with a black background. I've seen this on several YT channels lately. Hopefully when I come back later it will run.

[@freshgino]

Reboot your PC and clear your browser cookies if that issue continues

[@Turk182_]

Believe me your videos save lots of lifes... 😉👏👏👏👏

[@motog4plus316]

Fantastic content ❤️

[@avejst]

Great video Thanks for sharing :-)

[@thesilentonevictor]

Great information

[@Roshan_Kodagoda]

Crystal clear 👌

[@palaash4]

Thank you!

[@electronicacademy2157]

Thank you so much

[@HVAC_MECHTECH]

Dear sir kindly make the video on scada and dcs you explain better than every one and its easy to understand

[@lamtrungrau5986]

thank you so much, i love this video

[@ahmadrahmadtullah.u5806]

Amazing👏

[@HVACGUY]

As always a nice video.

[@claysonwebster1622]

Awesome vid bro

[@likachan7740]

Thank you

[@yogi9631]

Great explanation. 👍👍👍👍👍 I subscribed

[@Shawndoh]

Good refresher since college

[@JaykeSapalaran-iq3qs]

Great video information ❤ PLEASE MAKE VIDEO INFORMATION FOR CONDENSING UNIT,PARTS FUNCTION, AND SEMI HERMETIC PUMP ,

[@bolanleajatta]

Perfect

[@glowheat4469]

Good video.

[@brunomenezes9887]

Very good👏

[@msk3599]

Thanks

[@noreaction1]

How does one choose which refrigerant is best suited for which hvac system?

[@dankmeams1867]

This Channel has better content than 99% of school textbooks

[@sdge2075]

I'm so glad you made this video, I could've sworn you made this already but either way thank you.

[@PampostReturning]

#Thank you#

[@TPhype-Discovery]

Nice. Could you please make a video on how electric generators work? I've been wanting to know for quite a while.

[@EngineeringMindset]

Please watch our video on electrical generator basics, launched couple weeks ago

[@7sedma]

nice

[@elaxerblaxer]

Thanks so much I needed this Who else searched for this video!?

[@rhustleraamera4678]

the best!

[@kosgallana1]

Your good😎

[@maxpowers3732]

How do you cool multiple rooms in a home or small office? I'm assuming there isn't an evaporator in each room. How do you have different rooms at different temperatures?

[@Kavil500]

U deserve more than Coffee😊

[@freshgino]

Yo paul …..in addition to your AMAZING graphics - can you show us more images of what the actual part or component looks like as you start to talk about it

[@EngineeringMindset]

In the older videos we did this a lot more, check these out for more details

[@mixme8655]

The best

[@MrCarbonD]

Love your channel. Do you have a video abou the difference between chill water systems and condenser water systems in commercial hvac uses ?

[@EngineeringMindset]

Yes, please look through our channel or website

[@jetonhaxhia4393]

Condenser water systems take the heat from the refrigerant (indirectly from the room) and release it somewhere else, chilled water systems take the heat directly from the room and release it somewhere else

[@Royd20]

@@EngineeringMindset Appreciate your hard work in making this Video Bro, In India we have split AC and window AC in residential Buildings in India, I just want to know how the Exchange of Oxygen takes place from outside home to inside the house, since the door and windows are closed of a particular home, and no other ventilation system is there at home Make a video if possible.

[@said4244]

well thanks

[@sharrybhai9217]

Gr8 c0nTenT Thnk y0u s0 MuCh❤

[@jc-hq4sb]

I wanted to learn the basics of an AC for quite some time and this was perfect, please if you could do a video about the electric circuit of an AC that would be great

[@gustav9911]

He already got video about that .

[@windsofmarchjourneyperrytr2823]

Look into boiler systems. They're much more complex and take more maintenance.

[@ahmadsyahmi351]

id like to ask. evaporator in my acc has 3 sections which are labeled as top, middle and front.. when i turned the ac on, only the middle one became cold, whereas the other two were not. i touched it during checking. is this because of the bulb malfunctioning which causes faulty feedback to the orifice controller valve?

[@Jasmarkelina]

cool

[@onair141]

Really great video and highly understandable for my nugget 😌

[@torrentails]

3:50 Aww, we ❤ you too!

[@atefrod680]

Would love to see more videos about cooling but also hvac design! Im about to start an internship at a company that designs and calculates cooling and air handling systems

[@EngineeringMindset]

We have a lot of videos on hvac and design, check out our channel

[@atefrod680]

@@EngineeringMindset Yes! And I saw almost all of them. But I wish you would dive deeper in your videos. Maybe show us the design process with more complex systems in hospitals for example!

[@janiksomaiya1635]

@@atefrod680 Did you find anything? Please can you pass along if you found any sources for that?

[@edwintjoa6099]

At 6:09, as superheats increase, shouldn't the TXV opens more to allow more refrigerant into the evaporator? Please clarify.

[@tinytonymaloney7832]

Great informative video that and interesting. Anybody spot the spelling mistake on top of the screen 😀😀

[@waltanthony1988]

you should have kept the outside example (@ 0:17, 3:22 ) of the model the same as the other working model instead of switching sides of the condenser and evaporator. I was trying to imagine it working on the house ... while taking into account everything is reversed from model showing the flow. its a minor nit-pick, overall its a very good video - thank you.

[@masonshaler977]

Could you do a video on how an engine works?

[@melwinjohn1521]

At 0:50 you have clearly explained the basic principle of refrigeration which is unknown to most people. This is the key answer to the question "how the refrigerant is cooled".

[@MrGabriel1973]

weird assent but love these videos

[@kazimir8086]

Is it possible to reach 300°C-600°C on the condenser site?

[@CristobalAshton]

So, what's an inverter?

[@mrcubepad4564]

Can't believe I'm still visiting this after 12 month into hvac trade school

[@windsofmarchjourneyperrytr2823]

It's years of experience, as I'm told, so don't get comfortable over there. Lol. Then, you have boiler setups. Of course if you screw them up, it can spread steam everywhere and ruin things. Or, flat-out blow up. Maybe not to the Shining extent (big plot hole there, who'd spend millions on a hotel and not bother with a BASIC shutoff system??) But still probably not safe. Certainly not cheap to replace, either. If one of your floats gets stuck open, you'll get a LOT of BIG banging noises and water POURING out of every radiator on the 1st floor. It's too easy to screw up.

[@bradwendica5737]

Before,we used freon 12 &22 w/c were detrimental to our Ozone layer,you presented these different types of refrigerants,are these refrigerants are Ozone friendly?thank you.

[@Redtooth75]

Modern refrigerants are not ozone depleting. The old CFC and HCFC refrigerants were ozone depleting. Modern refrigerants are HFC, HFO, and HC which do not deplete the ozone. The thing they are concerned with now is the global warming potential which is a measurement of its greenhouse gas effect.

[@elena6516]

perhaps a video on the electrical and control side of heating and air conditioning?

[@Mister_Pedantic]

My experience in working with the tools in the HVACR trade is that a high percentage of problems are electrical in nature.

[@elena6516]

@@Mister_Pedantic what sort of problems do you see on a regular basis?

[@Mister_Pedantic]

@Hayatekunai I used to answer HVAC questions at Quora and so many of the ones from Asia were about capacitors. What is up with that? I rarely had to change a failed capacitor on a PSC motor.

[@Mister_Pedantic]

@@elena6516 I am retired now. Most electrical problems are controls that have failed. Why is a system not cooling? Most times it is not a refrigerant leak or a failed compressor. It's a control problem. It's important that you learn how to read an electrical schematic and be able to imagine the various controls during the cycle.

[@paulvild]

Mine failed because the contactor coil failed. $20 for the replacement contactor.

[@Samara200M]

I just understand about evaporator and condenser

[@power-max]

The compressor has to perform work in order to compress the refrigerant. However could some of the energy used to compress the fluid be extracted in an expansion valve, it if were a turbine of some sort? Or possibly a sort of "steam engine" type design? All the typical expansion valves are basically analogous to a resistor or rheostat in electronics from what I can tell.

[@EngineeringMindset]

Well the turbine would remove pressure because of the resistance, as the condenser is rejecting heat to atmosphere it would be better to make use of this waste heat which will then convert the refrigerant vapour into liquid without using a fan.

[@kyleh1974]

@@EngineeringMindset there's applications out there that do exactly this. Many geothermal heat pumps utilize discharge line heat recovery to transfer heat to domestic water heaters.

[@EngineeringMindset]

Check out NEW resistor video, everything covered! ➡️ kzbin.info/www/bejne/eorGfXl-nLt2pJI

[@heyderaliyev8976]

Paul, if you could include, *how temperature control works by AC's remote control* (how a remote control changes room temperature) that would be great 🙄👍😒🤔

[@mobx18]

If you have a window or portable a/c the temperature sensor is usually around the units intake air. It is transmitted wirelessly to your remote so when it reaches your desires setpoint the remote sends signal to shut off a/c.

[@peepeepoopoo1399]

Can you please rephrase your question? I like to have a dialogue with other commenters but I don’t quite understand what you’re asking.

[@heyderaliyev8976]

@@peepeepoopoo1399 what happens inside AC unit when you take AC remote control, and start changing temperature (increasing cool or heat)

[@Nicko-ir2to]

@@heyderaliyev8976 it’s called a reversing valve

[@heyderaliyev8976]

@@Nicko-ir2to reversing valve changes from Heat to Cool , but my question is.... when you adjust cool/heat from remote control, how that happens inside AC unit

[@mrgreen9086]

Went to school with the attention to be an engineer decided to get my epa instead to be a hvac technician hopefully I can find a way to finish my degree. Don't want to be working on roofs or in attics in my 50s lol

[@gus473]

Start your own company, so by the time you're in your 50s you can have someone else going up there! 👍🏼😎✌🏼

[@mrgreen9086]

@@gus473 yes that's an idea that's cross my mind once I get more experience

[@Mister_Pedantic]

Commercial/Industrial systems are where the fun is. Don't get stuck doing residential.

[@mrgreen9086]

@@Mister_Pedantic well I do both residential and commercial, but I definitely want to specialize in commercial

[@estelam2745]

This is a type of heat exchanger with a coating applied for the only purpose of dehumidifying, or "drying", the air stream before it enters the home. What is it? Can somebody help me with this question?

[@dfailsthemost]

So, it condenses into liquid in the condenser despite the low boiling point? Due to the pressure?

[@Redtooth75]

In the condenser the refrigerant has a relatively high boiling point due to the high pressure. The boiling point is higher than ambient temp so the refrigerant will condense when it is cooled by the ambient air.

[@shuaibhusainmirza4707]

Good video for learners. As an Instructor in Airconditioning & Refrigeration , i would advice to correct spelling. ie. " Airconditioning ".

[@EngineeringMindset]

It's too late, KZbin doesn't allow edits once published

[@vincog]

is it ok if the outdoor unit placed higher than indoor unit?

[@EngineeringMindset]

There are limits but yes. Check manufacturers install guide

[@Bazarack]

Deodorant is a good example that the gas that expands becomes cold :)

[@capillarysystem]

I wonder what kind of expansion valve i have

[@daremahmad1001]

Burning question for you: can the temperature at which the refrigerant boils post the expansion valve be controlled? say at -5 or -10 or -20 degC ?

[@ol_brendo2350]

thats dependent on the refrigerant being used. the expansion valve controls the superheat and lowside pressure

[@slengoslengaw8510]

@@ol_brendo2350 thanks Brendan. Say it was R134A, it boils at around -26 deg C but is there a way for it to boil let’s say at -10?

[@ol_brendo2350]

@@slengoslengaw8510 it’s pressure related to. So if you look at a pressure temperature chart -26 C is .05 PSI but -10 C is a pressure of 14.4

[@OfirAviv1994]

I don't get it, evaporator means high pressure = high temps. How do we get cold air from that.

[@brianiswrong]

If you think of the evaporator as your TV screen . A fan blows the room temperature (warm) air into you TV screen. Inside your screen is the gas,which boils inside it's sealed tube and absorbs heat from the air passing over it. The air is now colder as it exists the back of your TV. Now bear in mind you sitting room is " sealed" (your fridge or freezer certainly are) and you think of the process above,but this time consider that every time air enters your TV it's slightly cooler than the last time,and colder as it exists you TV through the back. Continue that cycle and you are chilling colder and colder air each time. Eventually the air in the room (or fridge or freezer is cold enough in general to match your desired temp and the chiller turns off.

[@OfirAviv1994]

@@brianiswrong ty

[@okithdesilva7644]

Can you make a video about Synchronous motor

[@EngineeringMindset]

Coming soon

[@okithdesilva7644]

@@EngineeringMindset Thankyou so much

[@sureshd2095]

I have a question! How come the condenser unit can change the refrigerant from gas to liquid? As you said before refrigerant boiling point is -40degC so by forcing air over the condenser will still keep the refrigerant in vapour state???

[@jetonhaxhia4393]

The hot gas in the condenser is cooled down by the ambient air passing over the condenser coils. The boiling point of the refrigerant is relevant in the evaporator as this is where the liquid refrigerant absorbs the heat and evaporates ("boils").

[@sureshd2095]

@@jetonhaxhia4393 lets say the ambient air is at 30degC. By forcing this hot air over the condenser coil will still keep the refrigerant at vapour state bcoz refrigerant will turn to liquid state only when its temp is below -40degC?

[@jetonhaxhia4393]

@@sureshd2095 I understand your confusion now. The boiling point is -40c but that is at a low pressure. A refrigeration system will have much higher operating pressures which will push the boiling point of the refrigerant to about 5c in the evaporator and to about 50c in the condenser during normal operation.

[@sureshd2095]

@@jetonhaxhia4393 Thank you Jeton! Now I understand that the boiling point of Refrigerant depends on its working pressure. Thus the Refrigerant can condense to liquid at 30degC outdoor air temp.

[@densista1160]

for the ac to work as both a heating function and cooling function, doesn't that mean that the inside part have condenser and evaporator, and so do the outside part?

[@EngineeringMindset]

Please see our heat pump videos

[@Redtooth75]

On a conventional heat pump during mode the inside coil will be the condenser and the outside coil will be the evaporator. There will still only be one coil outside and inside. Each coil will have its own metering device but they will only meter in one direction but allow flow freely in the other. So discharge gas flows through the insidecoil and condenses, flows freely through the inside metering device, and then goes through the outside metering device and coil. In cool mode its the opposite, it flows throught the outside coil and bypasses the outside metering device. A reversing valve is used to switch between the modes. On mini split systems its largely the same but there will only be one metering device located outside. The metering device is electronically controlled.

[@HomebrandFishfood]

My job because I’m a teenager is to destroy old ac units it’s pretty fun

[@EngineeringMindset]

Take them apart and see how everything works. What's connected to what, what happens if something breaks. This will be very useful for you in your career

[@peepeepoopoo1399]

Good stuff! Try looking into the trades. There’s a lot of old dudes that can’t retire cus too many young kids look down at trades people as brutes. No new blood and worsening global warming means we will be in urgent demand for the foreseeable future.

[@kabilant378]

Bro please suggest a solar and bldc related project except pump and electric vehicle

[@EngineeringMindset]

Check out the new BLDC Motor video: kzbin.info/www/bejne/r5qnZqF5m9KVjJI

[@EngineeringMindset]

Seen our new video on HOW SOLAR PANELS WORK in detail kzbin.info/www/bejne/j6nXaGWXec95nbs

[@gulshankumarsony023]

QUESTION for those who understood video (coz im confuse a bit) When we charge refrigerant in any basic split or window ac... through suction line with unit ON... we hold the refrigerant Can/cylinder upside down.. so that refrigerant can be charged as liquid... then why compressor doesn't get damaged???????????

[@kevinrubin6747]

Great question! Anyone know the answer?

[@gothmajesty1976]

the "damage exaggerated" part made me laugh. lol It's like saying "this is a joke" to those r/wooosh-able people.

[@lancefilio]

The video headline main title is missing the letter "n".