How TXV works - Thermostatic expansion valve working principle, HVAC Basics vrv heat pump

[@EngineeringMindset]

⚠️ *Found this video super useful?* Buy Paul a coffee to say thanks: ☕ PayPal: www.paypal.me/TheEngineerinMindset

[@desertfox4273]

Its said , cap-ughh-larry. overall great video. A1

[@balajichandrasekaran6312]

The Engineering Mindset for a 15KW (with PHE) Capacity System , We used TE12 - Orifice 6 ( We didn't consider the Sub-Cooling caused by PHE + we weren't using PHE initially) Effectively System was delivering 10kw ODU with 15KW idu with TE 12 Orifice 6. @ 8psi Suction & 275psig Discharge. 1 system later failed as 2 cyclinders of compressor discharge reed went off, as soon as we enabled PHE,( may be or bcoz of TXV) Question is was the failure because of TE12 during normal Operation or the mismatch of PHE & TXV. Accurate Txv is TE5 Orifice 3. for the system (later as we considered additional Sub-Cooling)?

[@Ednel]

Is Thermostatic expansion valve principle the same with Direct Cooling Technology?

[@fokuspimp360]

The Engineering Mindset what happened to your VRF videos? I can't find them

[@EngineeringMindset]

New VRF unit video here:➡️ kzbin.info/www/bejne/apqUiZqZhZano9k

[@joseojeda4397]

Recently got into the commercial refrigeration trade. Been watching your videos since I started. I appreciate all the info really helpful

[@hassan5044]

I literally jumped when that compressor in animation, exploded 🤣

[@hectorsoto7575]

Same

[@joshu417]

same here lol

[@MichaelNoon]

Same here

[@pelesrelewot]

Smae

[@filipfagersten8104]

Hahaha me 2

[@landolorean51]

This channel is amazing, the detail that goes into your animations as you describe these processes is a true gem of a study aid, I am a studying hvac apprentice and I'll be using this material to get this stuff down cold!

[@middy774]

no pun intended??

[@jonnywilson9117]

How've you gotten on with the apprenticeship? Fully qualified now??

[@yechris2001]

I have watched videos from dedicated hvac techs and I was still confused. You explained it perfectly. Thank you

[@buttonman6262]

Got my SV Second Engineer oral exam next month and these videos are a godsend! Thank you!

[@eaf2k]

Wow, absolutely high quality stuff. The level of details, clear narrative and even background music... Good job and tons of thanks!

[@ginodimarco1153]

This is a wonderful exploration a relatively complicated subject. I am currently replacing a compressor and txv for a home owner. This is a fantastic video to share with him while I complete the repair. Thank you .

[@jpjpjp5847]

Great simple video explaining the process for someone who is not an HVAC tech. Thanks.

[@richsellskc]

nice. i was dozing off near the end of the vid....suddenly "BOOM"... good one!

[@Sardy540]

Haha! Me too.

[@snow7912]

Exactly lol

[@gauravladha5465]

That got me😂

[@andresl2785]

Same here! Lol 😂

[@Gsantos318]

Lmao same here

[@bala14321]

Very well explained and highly informative. Compressor damage/ explosion due to liquid entry is worth the highlight.

[@danielesteves3435]

This is the best video I’ve seen explaining the TXV. Thank you 👍🏼

[@xiaomingzou8110]

This is a great video for understanding the importance of TXV and its working principle.

[@airlanggaariopamungkas8494]

Organized and detailed explanation, i like the analogy and circled appointed equipment when the narrator speaks

[@maxxsmaxx1901]

This is the best one on AC systems. Thank you !

[@anthonymanson4855]

Great discussion on the function of the bulb...its pretty clear that if the valve gets stuck in the closed position, there will be no cooling even though the refrigerant in the bulb is expanding against the diaphragm (trying to open the valve).

[@larryd9068]

Great explanation of THX with excellent illustrations. But please make the music lower then the narration so that the backround does not dominate speaking.

[@Yourengineeringstandpt]

Turn up the volume when you're recording your videos thanks man. Thanks for the video

[@jordanhowe7621]

Lol

[@DellAnderson]

Very nice explanation of simple TXV. But would be nice to have quick overview of some variants, like what is the third port on TXV which connects directly to the suction line?

[@teravolt6113]

It's the external equalizer line. Big evaporators need externally equalized TXVs because pressure drops considerably inside them, so the equalizing pressure is sourced from the evaporator's outlet rather than from the TXV's outlet.

[@michaelatkinson4434]

Change of state begins the moment the refrigerant passes through the tx, not just at the end of the evaporator. There is one constant temperature for as long as the refrigerant is changing from liquid to gas.

[@maysaraabdo5339]

Well said you really summed up the entire information from the beginning of your video in your example. Thank you.

[@bodegadiescast305]

I went from 😴 to 👀 when compressor exploded. Well animated video, for those new hvac techs 👍

[@macabre19]

These are the best videos I've seen on KZbin. 👍 Thanks

[@avinashkanesen53]

Thank you very much.You made a very clear explanation about refrigeration system

[@patrickdanga7118]

This simplified so that anyone can understand thank you

[@srzaasrzaa1733]

Super! Fantastic educational explanation. Please add few words about TXV capacity VS system capacity, means to say can it be variable or must be same as system capacity. Thanks

[@josephmichael308]

Superb! Very helpful for people like me who are venturing out into this field: ie- Marine engineering. Will you please do one on steering system

[@camaconetau]

I was waiting for you to tell us how to know if the super heat setting is right or wrong and why and what to do about it.

[@RoyIniguez]

Thank you so much watching this video. I Now understand Automotive type of expansion valve. Although it's very different it's also very similar. The automotive one does not have the capillary tube. It has a high pressure line and low pressure on the same block.

[@EngineeringMindset]

Yes, we have a video on EEV also please check our page

[@ΗλίαςΦασουλάς-π8γ]

Ευχαριστούμε!

[@EngineeringMindset]

Thank you!

[@AvianFlight]

That Jump Scare Explosion.

[@ibrahimabuadas9268]

I thought I was the only one XD

[@Rickey904]

I use a Denon amp for my pc.

[@Dartheomus]

I almost threw my mouse across the room!

[@JW-qp5uf]

That explosion almost knocked me out of my chair haha.

[@WarHammer1989]

Not sure if you care to know, but around the 2:10 mark, you show a recording of a sensing bulb strapped to the suction line and it’s strapped with two zip ties Obviously it’s still going to sense the temperature off the suction line, but you should use a metal clamp instead because that metal clamp helps distribute the “coldness”-for lack of a better term-evenly around the sensing bulb and not just on the mating surfaces. Not trying to be a know it all. I just assume you like to constantly get new relevant info. Thanks Paul! I’ve almost watched all of your videos

[@EngineeringMindset]

Thanks Josh, nice tip.

[@moatazanwar6564]

Finally, got it, thanks for sharing!

[@james77011]

this guy is an amazing teacher 😇😎🤓

[@md.abulbashar1820]

Marvelous explanation.. no more word to say

[@Alex-jo2oi]

This is intimidating knowledge. Is this a necessity when getting started with installs?

[@bikerbobcat]

Compressor spontaneous disassembly was a good chuckle, thank you. :D

[@md.abulbashar1820]

Marvelous explained but back sounds little bit irritating. Keep up good work

[@Daluke61]

Had watched this once before, forgot the thumbs up; got it right this time around.

[@loveofkemetify]

Who the hell thumbs down solid material such as this!? People take time to make such videos that help thousands and you get such d***s out there 😒

[@1965ace]

So basically a higher temperature at the other side of the evaporative coil opens the valve and a cooler temperature closes it. The goal is to keep the refrigerant a gas for the compressor to compress (liquids don't compress) and to keep the system from freezing in an ac unit. So in adjusting tightening the spring lets less refrigerant in thus increasing exit temperature and loosening decreases exit temperature.

[@pipi7731]

Good explanation of the system. Thanks

[@saluteyanomaly7628]

Quick question: when you say the expansion valve will open more, you mean there will be more vapor in the flow (higher x value) or less ? If you cooling load is high (low x value), then the temperature after expansion, as well as after evaporation are high. In order to decrease the temperature after evaporator, you should decrease the temperature after expansion, this means you need have flow with high vapor fraction after expansion. Combining this logic and your description, the more expansion valve open indicates more vapor fraction in the flow. Am I right?

[@guysmileyjr.9482]

excellent graphics and good explainations

[@johnelicker3967]

nice always wondered what they did thanks for sharing

[@mikechiodetti4482]

Thank you for this very understanding information.

[@temanalysis1270]

great video/animation and explanation; background music is a bit loud and distracting

[@fahimasghar6375]

Superb explanation. Thanks

[@shaukathayat749]

lovely videos...keep ur efforts continued.

[@obioger]

Great Geat video !! Helped me a lot !

[@mountassirfares3888]

Awesome, clear and concise, if you could, slow down the music, thank you so much

[@consaka1]

Ok, correct me if I'm wrong but in order to get a liquid to the compressor you would have to overfill the system to begin with. A system with the proper amount of refrigerant has to compress it to get it into liquid form to begin with. Once you let the pressure of from say the TXV being wide open, the liquid would simply turn back into a gas and because of no pressure it would just stay in a gas form.

[@Muhammad-Ashfaq2030]

Thank you so much 💓 for this inriched informative video

[@budapestprojectytc6002]

I just love your videos, man! Thanks!

[@lifehealthandhappiness5661]

Perfect explanation 👌 👏 👍

[@younessbenbrahim9360]

Thank you for this video, I wish you put more about comercial refrigeration.

[@johng5295]

Thanks in a million. Great content. Awesome. Grade: A++💥

[@matiasarntzen9060]

what happens with the pressure inside the evaporator when more liquid is injected? thank you nice videos

[@satratey]

Excellent video, Is it possible to close TXV completely to stop the liquid refrigerant flow to the compressor when the load on equipment is very low.

[@vendhanmarine1]

Could you please explain about the equalising line? Why is it required? How it works?

[@patriciawhitley4095]

He just told you

[@dongertan3320]

This is great. Thanks for your educational videos. Alot of thanks.

[@giftnjagu6470]

Very Educative. Thanks

[@davsportal1358]

I learned so much.thank you sir.

[@argenismoreno8838]

Great video as always.

[@JoeLiberalism]

So is that why you check sub cooling with a TXV system? Im new to this , trying to learn.

[@aaronwang565]

Very helpful, thank you very much

[@mns.gh6432]

Thanxs more we follow ur video always from Iraq

[@connorspies]

Had a crummy professor for Thermodynamics. They didn’t think it was important to explain how a TXV valve works. After watching this, I have no idea how they could be so obtuse. Understanding how this valve operates is absolutely critical to be able to think about what’s happening with these systems. Screw you professor Patel.

[@mohdsafri3883]

Awesome explanation . Thanks a lot 😊👍🏻

[@AJ-et3vf]

Awesome video! Thank you!

[@JPVlognary]

Wow! Very well explained. Thank you.

[@معاذجدعان-ز7ظ]

incridebile explanation Engineering Mindest ,,, but I have critical question of the condenser that reduces the refrigerant temperature. So the temperature after condenser is less than before ,,,, why the pressure is maintains constant since the temperature decreases ,,, it must be decreases ,,, is not it ??

[@EngineeringMindset]

You might have some pressure loss through there but the compressor is still pushing refrigerant behind it

[@acrepairnearme]

Best explanation! Very quality picture!)

[@osamahaider918]

Amazing explanation ...thanks

[@josephpuchel6497]

Hello excellent video Is a vehicle AC system similar to this ? Thank you

[@paulrozinski1488]

Great video , thanks 👍

[@joshuaaustin2541]

I flinched when that compressor blew up. was trying to sleep there

[@al151]

I have a question. Is TXV only changing the liquid mass flowrate of the refrigerant through the TXV since the outlet is a mixture of liquid and vapor, or the total mass flowrate of the refrigerant? The reason that I am asking is that the total mass flowrate of the system should be constant. So the mass flowrate of the refrigerant entering and leaving the TXV should be the same in a closed system. If the TXV is changing the total mass flowrate, then where is all that refrigerant going coming out of the compressor (single speed compressor)?

[@tonyl9075]

Excellent video!!

[@Natnat_816]

Did you mention the function of sensing bulb?

[@jonnyhogarty]

Working on a 404a commercial freezer. Thing was at 96 degrees Fahrenheit when I arrived. Compressor was hot. Low pressure was in a vacuum. Would the TEV cause this being that it’s stuck and the pin is restricting flow?

[@cyrusaraza1720]

Good day Sir. I just want to ask something. I have an upright freezer that I wanted to make the freezing faster. Can I use the TXV, to modify the speed of running refregerant. Thanks in advance for any info.

[@joefajardojr3902]

A very well understanding,thank u

[@blackericdenice]

The freon doesn’t carry heat to the compressor. The compressor compresses freon which cause it to get hot.

[@munthasirmi777]

Nice explanation.

[@salomebeshidze8376]

How is indoor TXV bypassed in heat mode? does bulb simply open it all the way and size of the line matches size of TXV opening?

[@rajatsrivastava7791]

In some designs we have a feedback acting from downwards! Please include the explanation for the same

[@abhinav7737]

Very good info.

[@binyammamo6454]

Thank you for the best explanation ever....

[@gamewizardks]

7:42 scared the Bejeebers out of me.

[@Fierant]

Why the capillary tube is coiled at the top of the valve? Is it just to add buffer length or does it have some function?

[@petez470]

Good stuff. Thanks for the video!

[@floatybyboaty]

A question in the C&G Exam was relating to Wet Bulbs and Capillary Action. Now i can see the light.

[@BhaveshKumar-xx4lu]

Good explanation

[@saghirahmad9634]

i fall in love with danfiss since 1993

[@vikasjha5760]

Can you please explain in temperature vs entropy diagram that how there is no entropy change in process 1-2 even when compressor compresses refrigerant? I believe that entropy should increase if any gas is compressed.

[@JaykeSapalaran-iq3qs]

PLEASE MAKE A VIDEO TUTORIAL FOR KING VALVE or Service valve ,every parts of condensing unit

[@EngineeringMindset]

See our other videos, they have all been covered

[@TurBroTony]

Does the TXV have to be installed close to the evaporator inside the cool room or can it be installed on the outside of the cool room? Does it matter?

[@renj6531]

7:37 I didnt know compressors had emotion. LOL