Absorption Chiller, How it works - working principle hvac

In this video we learn how an Absorption Chiller works, covering the basics and working principles of operation. We look at 3d models, animations and real world examples.
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#HVAC #refrigeration #engineering

[@EngineeringMindset]

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

[@keithcooper2012]

Just found your channel! Awesome videos! Could you do one on Silica Gel Adsorption Chillers? Does the Silica Gel attack the water vapor like the lithium bromide?

[@ariefsyahrizal3645]

Hello, sir. Do you have a 3d model so that I can understand how actually this concept constructed in real life pls ? Or do you have any suggestion a site for the reference.

[@ptoktedia9011]

This is by far the ONLY one i can understand. Thank you so much for explaining the basics. I've stuck in how water refrigerant (of the chiller) creates the cooling effect. The only missing part was vacuum and water boiling point's correlation, you explained that and saved my day almost instantly.

[@maxie4937]

Great video! I wish the temperature for each line is placed there, so we can picture the heat exchange clearer. Thank you.

[@brlinrainf]

Me too

[@carloslemos6919]

The explanation is wrong: Hot water/Steam is dumping heat into the system. Chilled Water is also dumping heat into the system.

[@HuntersHavenWithChad]

The energy plant I work in has 2 absorption chillers and the water supply is off our main condensate return line. Pretty cool how it all works and ties together. Thank you for the videos!

[@kierrantrpr]

hey, the chilled water flow direction icon seems reversed.. and I think it will be easier to understand if you put Operating Pressure and Temperature (or T & P for each flow) so we know whether the heat transfers are feasible.. Thank you anyway for making such a great educational video..

[@YellowPinkie]

I also think a typical kWh energy transfer or %age energy transfer would be useful; the energy in the waste heat, how much ends up being rejected in the cooling tower, how much gets returned as chilled water. Great video to help a sparky understand the 'magic' of an absorption chiller.

[@lostinthewoods3918]

Nah

[@brlinrainf]

No, the color is reversed

[@MuzzaNZ]

congratulations on being the first vid on absorption chillers that I could actually understand. Well done TEM!

[@malloott]

Absorbtion chillers are pretty amazing machines frankly, such a genius way to do it.

[@rockanrollrudy1803]

Thank you this is a great way to learn and your videos have helped me and my coworkers a lot. Thanks again

[@hmandeelful]

That was the best explanation for an absorption chiller that I have ever come across, awesome job and thank you ..

[@RoBD7]

Amazing work! The explanation is so detailed and simplified!

[@johnkern7075]

Great video on how this system works. I never understood it until now.

[@Magicus1]

Wow! That was a ton! I’m kind of upset I never learned this in my HVAC elective. Thanks for your help! This really helped shed some light on this topic. You’ve gained a subscriber!

[@Apkaa]

1tr (ton) app 12000btu british thermal unit

[@byronjones3579]

Mate your amazing I am going to get my staff to watch your videos.

[@Deivasigamanierode]

Good Video Illustrates completely about absorption refrigeration

[@mostafafallahnejad977]

Thank you for this video. I'd suggest to add inlet and outlet temperatures of all loops to the graphic that is shown in the video.

[@spludgey]

Awesome, thanks mate! I couldn't get my head around it from just looking at the diagram.

[@sherwinfrancis1810]

The best explanation ever !!!. Thanks to ur animation, easy to understand the process flow

[@mohammedtaseensyed1034]

You just nailed it man....awesome work...mind blowing video.

[@yem.t.3930]

Far far better than my professors, thanks alot men

[@Sujit160769]

good explanation.. for the basics to clear

[@senthilkumarns4077]

Thank you so much for clear explanation. I think you have missed to talk about the heat exchanger on the left bottom

[@richardkwamenkrumah313]

Very educative and simple. Thanks!

[@Earth098]

Thank you so much for all these videos!!

[@dylanwalker5450]

Thanks for the excellent video! This particular one could definitely have benefited from the narrator pointing at what he was talking about with a cursor or something, especially towards the end when he's putting it all together, it got hard to follow. But still it's way better than the black and white pictures in my text books!

[@TheBozodclown]

I liked this video a lot, it helped explain things in an accessible way. Just curious if you can clarify two questions I have: The chilled water line comes in at about 12°c that's already quite cold. How does it get down to 12 if the area being cooled is hot, say 35°? 2. How does the cooling tower work? Is it just a pipe that the warm water runs through to reach ambient temperature? Doesn't that contribute to heating the area?

[@minasidky3267]

Great video and explanation thanks alot .

[@crawling309]

you guys are awesome. Awesome means awesome. . I want more video about this absorption chiller.

[@brlinrainf]

Me too

[@75raid75]

Thank you so much that helps me.

[@roccovanderwesthuizen3518]

Your video has been very useful! Thank you

[@sanjaybopshetty7406]

Nicely explained . Very easy to understand

[@tintunbirha]

O.K I got the basics. Now to look at other videos that give details of calculation of flow rates in chillers. I have 2880 cft room that needs cooling this summer. I already have solar water heaters installed ( 300 lit per day to 70 deg C). lets see if I can get it done.

[@VinOng-er6ks]

The secret lies with partial pressure. As the Li-Br absorbs H2O molecules, it decreases the partial pressure of water inside the evaporator which causes the partial vacuum and hence the cooling effect. This is almost similar to the expansion valves of a vapor-compression systems.

[@kabu7073]

Great video, thank you. Subscribed.

[@seshadrikumarn2895]

AN EXCELLENT AND LUCID VIDEO. FELICITATIONS!

[@mohammadqaderqader2425]

Thank you for the nicest video I have ever seen, please correct the direction of arrow for chilled water pump. Chilled water flow direction and pump symbol flow direction is opposed of each other.

[@EngineeringMindset]

Yes it is an error, unfortunately it can't be changed now it is already published

[@hyerimkim6162]

Thank you very much!

[@shehzadakbar12]

Awesome and simple presentation. Welldone.

[@gegomez]

Beautiful work! ✊🏾✊🏾✊🏾

[@sadeghsalarizadeh7966]

this mov one of the best movies about absorbtion chiller I have ever seen. Dear , can you record and teach a mov about multi effect absorbtion chiller and cristalization effect in chiller? with best regards

[@ameralanati2066]

Great video. Well done !

[@felipemenezes3373]

Thanks for the video. Very Nice!

[@kennyray1381]

Awesome video. Thanks!

[@ciaocarbon]

Great explanation, a real human voice and no distracting muzak in the background. There is no compressor, but compared to a classic vapor-compression A/C, how much energy does the pumps and control system use? This assuming the heat source is "free", just the system itself. Thank you.

[@francescogelio4451]

It depends on the machine, bin my experience if the electric consumption of compressor chiller is like 30% of the entire cooling energy production with and assorber this electric energy is like 1%/2%. However with the assorber you spend more water and so more energy in the cooling tower, but in the end less than a compression chiller do.

[@davidjames1827]

Really best Explanation! Will be better if you could add concentration of Libr at various points . Thanks

[@hsuan-jenhankwang2448]

Exceptional explanation thanks you very much

[@mohammedkhaleel2243]

Thank you very much for this informative video 🌹

[@MahlmeisterTV]

It would become more useful if you added temperatures and pressures. I see someone else already asked you to change the flow direction of the chilled water...but since it isn't clear to me if purple is cooler than blue, it's hard to tell if the flow direction is wrong, or the arrow is wrong.

[@ofonwilliam]

Amazing content i now fully understand

[@timg531]

Great video! But I suggest you change the third pic of water boiling at vacuum from an open beaker in the lab set up to some kind of closed vessel. Just to emphasize the vacuum in this case..

[@abhijeetp987]

Thanks..It was super helpful

[@rahuljadhav3525]

Very nice Video , thank you very much.

[@ferencbaksay7312]

really appreciate this

[@gobinathkalidasan6703]

Thanks a lot Mr.

[@muhammadshahzaib7882]

Nice and helpful vedio

[@maysam6806]

very very nice video and explain. i imagined that vacuum pumps create vacuum in absorption chiller but yo said that attraction between LTr and water steam make this vacuum

[@otri8977]

thank you very much!

[@yong1103]

amazing video!

[@premnoorie4456]

thank you very much

[@zigji7747]

thank you !

[@balkishantrivedi1539]

how absorption chiller works is too good to understand the Pricipal, right room grass root level, in smile way.

[@yacinedali2756]

thank you man

[@imtiazhussain5027]

Even this is 4 years old video, I found it very informative. I want to make a small homemade Low pressure ammonia absorption chiller. I need some more information to design one. May I ask you few questions?

[@faizmahboob8461]

Very useful video totally understand ❤

[@EngineeringMindset]

Glad it was helpful!

[@louli2480]

THANK YOU SOOOOOOOOOOOO MUCH XD

[@j0j0pat00]

great video Paul! Thanks for making it up.

[@rahulkambale2627]

Thank you.

[@ahmedyahya9693]

you sir, are the best. can you please tell me what program you used to make the animation?

[@keshavd9647]

gud information

[@ApacheCooper101]

hi thanks for youre vidieo. i noticed a mistake on the drawing the pump direction is going opersit to the flow indicators. can you do 1 colour pipes and take off the white scrolling boxs. its mind numbing hypnotic. pump direction or 1 arrow for each pipework is easy to understand. make it accessable as possible. take the back ground logo and just keep the one at the bottom

[@asaadali5219]

Thank you

[@user-wm3mg4jv9k]

thank you

[@randolphtorres4172]

THANKSGIVING

[@user-vh7hl2gl4w]

good article

[@markm.2194]

top explanation

[@ariefsyahrizal3645]

Thank u sir for the best explanation. Does this type of chiller only come with rectangular-shaped heat exchanger for the evaporator-absorber as well as the condenser-generator ? What are the considerations of why are so many Absorption chillers use rectangular-shaped vessels ?

[@burakkukcu5211]

mind blowing :D

[@bankaienator]

Thanks!

[@EngineeringMindset]

Thank you, John

[@berges104]

Rough numbers would certainly help conceptualize. Exact numbers would vary but Temperature trends should be consistent. ~ 100 in leaves at 75 out ect ect But looks pretty straight forward

[@TechnicallySound1]

not a magnetic attraction to lithium bromide but when water vapor produced in the evaporator area so there is more pressure than the absorber by pressure difference water vapor traveled to absorber hence lithium bromide absorb the water vapor.. BTW nice teaching thanks

[@petizati89]

HI Paul, thanks for the superb videos, can you do also one about ADsorption chillers ?

[@EngineeringMindset]

I'll add it to the list.

[@asaadali5219]

Thanks

[@338kishore]

please mention the temperature of different fluids at different locations to understand the cycle very clearly

[@asaadali5219]

That was good

[@joechavez2643]

After watching "the musquito coast" I was curious how this worked. Pretty fascinating!

[@luccaszach]

I was today years old when i learned this

[@mirzanahida1181]

Thankssssssssssssss paul

[@holmanyusedciprianoliveros8935]

Hello, you are excellent, you have helped me a lot, however I have the following doubts. If the refrigerant after being evaporated, it passes to the absorber, which must receive the heat of the refrigerant, but this absorber must be at a temperature controlled both in the absorption and in the condensation, fundamentally lower than that of the coming refrigerant. 1. How do I keep this temperature controlled? Is the same as in previous chiller videos, with a thermal expansion valve? 2. What temperature difference should I have between the evaporator return water and the absorber to make the process work? 3. What happens to the steam that heats the generator, this goes out to the environment by a fireplace? Or by a duct? Thanks a lot.

[@EngineeringMindset]

1. vary the amount of heat flowing into the chiller with a valve. more heat you put in, more cooling you get out 2. the temperature depends on the heat source and the manufacture, check design data from supplier 3. it condenses and returns via condensate line, or you can discharge to atmosphere but wasteful of energy

[@siggyincr7447]

I've been toying with the idea of a solar powered air conditioning unit and came across the ammonia/water based systems and the thought of working with concentrated ammonia is kind of scary. This seems to be a far safer chemistry to do this with. Overall this was a great intro to the way it works. Though there are a couple questions that spring to mind. How is the vacuum pulled? Is a separate vacuum pump used? Does the pump feeding the generator manage to do so? Or, as someone in the comments below stated, the cooled concentrated lithium bromide solution is so hygrophilic that is will create the low pressure by pulling water vapor into the solution. Which, if true, would simplify things immensely. Also, I'm assuming the water collection tray in the evaporator will need some sort of purge mechanism to occasionally dump the contents as otherwise over time it would inevitably start to accumulate the salt.

[@EngineeringMindset]

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

[@areeshainaya4338]

Very nice video and easily understandable. I have a question, Can we use Gas Turbine exhaust gases instead of Steam or hot water to transfer thermal energy to water+Lithium bromide mixture. Thanks

[@EngineeringMindset]

kamran baloch can't see why not, it just needs heat. The density will be lower but the flow rate it high

[@areeshainaya4338]

Thanks for your reply. I am currently involved in a project where we have Gas Turbine with around 69,000 kg/h of exhaust gases at 544°C releasing to atmosphere, we need to utilize the thermal energy of these gases by installing an absorption chiller.

[@EngineeringMindset]

Might need to push it through a plate heat exchanger, sounds great

[@pram3384]

Do a video on co generation

[@waelx30]

Thnx for the explanation. As I understood the pressure in the lower half of the chiller is very low, 0.84 KPa, the question is, what about the upper half of the chiller? Can you give us an approximate value of the pressure there.

[@EngineeringMindset]

its going to vary but ~10kpa

[@waelx30]

thank you, tha's really interesting

[@C05Mik]

Great video thanks ! I'm desperately trying to find an answer to my question; How can possibly a double-effect absorption heat pump reach coefficients of performance (COP) higher than 1 ? I don't understand how a heat input (let's say waste heat) can result in a greater amount of heat removed (numerator of COP) than the said input (denominator of COP)... Someone to help here ? Thanks in advance !

[@rangerdoc1029]

Because you are transferring heat, not creating it. Using a certain amount of btu, let's say 1, you can drive a process which can move more btu, like 2 or even 3 from outside to inside.

[@niravpatel7328]

Thanks for the video, but I’ve question What is the absorption form and refrigerant form in VAHP? Please Ans if anybody knows.

[@peterthomson127]

So the heat from the thermal input plus the heat extracted from the chilled water output all ends up being dissipated in the cooling tower?

[@thapcam4336]

This video so good. But can you write down here so that i can read

[@PhilosopherPhilanthropist]

Yes, "down here so that i can read".

[@anwarmohammad6294]

Is there any aplication for solar air cooling using CaCl2 with water? Its cheap and safe

[@industrialmaintenancesolutions]

Hi. how do you remove the lithium bromide from the unit and how do you recharge it back into the unit? is there a special procedure?

[@benjaminkaufman3887]

At what point in the absorption chiller is it used to cool a building? Is the chilled water pipe whats used for cooling a building? I understand how the system works in a closed loop, but am trying to understand how its implemented in a cooling system

[@simoncrooks7441]

Hi thanks for the presentation. How does the efficiency of an Absorption chiller compare with the energy needed to run a geothermal heat pump. I live in an off grid situation in Fiji and would like to set up a cool room for chilling vegetables to around 4c. I would need to generate electricity to run a heat pump or I could use solar heated hot water or a boiler to run a absorption chiller. If I build some thermal mass into the cool room the cooling system wouldn't need to run for 24 hours. Thanks Simon

[@EngineeringMindset]

These are not efficient machines very low COP, however if you have access to cheap or free heat then its a good consideration

[@emilskrzypczak9756]

How about aDsorption chillers?