Lithium Bromide Refrigeration System, LiBr refrigeration system
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- čas přidán 2. 01. 2018
- Hello viewers, Dr. Amit Mandal Here, go through my lucid lecture on lithium bromide refrigeartion systems. Lithium bromide (LiBr) refrigeration is a type of absorption refrigeration that uses lithium bromide as the absorbent and water as the refrigerant. It is a heat-driven refrigeration system, which means that it uses heat to power the refrigeration cycle instead of electricity.
LiBr refrigeration systems are typically used in large-scale commercial and industrial applications, such as air conditioning for office buildings, hospitals, and industrial process cooling. They are also used in some solar-powered refrigerators. Here is how a LiBr refrigeration system works:
1)A solution of lithium bromide and water is heated in a generator. This causes the water to evaporate, leaving behind a concentrated solution of lithium bromide.
2)The water vapor travels to a condenser, where it cools and condenses back into a liquid.
3)The liquid water then flows through an expansion valve, which reduces its pressure and causes it to evaporate again.
4)The evaporating water absorbs heat from the surroundings, cooling it down.
5)The cooled water is then pumped to the generator, where the cycle starts again.
6) LiBr refrigeration systems have a number of advantages over conventional vapor compression refrigeration systems, including, they are more energy-efficient, especially when powered by waste heat or renewable energy sources. They are quieter and produce fewer emissions. They are less complex and require less maintenance.
Perfectly explained, you know when someone has knowledge and talent when they describe things with simple drawings! Thank you so much, greetings from the Netherlands
Tenacity is everything, I read many texts and watched many videos to understand absorption refrigeration system, however I couldn't comprehend the complexity of the topic, but I didn't stop and kept referring to new resources and I finally found your video. Now I understand the concept. Thanks for the nice explanation.
The best concept oriented explanation for this topic on the Internet.
fantastic explanation, honestly so much more intuitive than other explanations.
This is very helpful to essay understanding. Thanks a Lot ,Sir.
It was really easy to digest.
Incredible way of explanation!! 🙏🙏
this video benefits me a lot, thank you so much!
Beautiful explaination
The example which you are giving is very good
You have such a amazing talent sir, what we want
Awesome explaination
It helps me a lot
I have exam at 1 PM today itself ...and this system would definetly come in exam of not less than 7-10 marks ! thank you so much
Thanks so much to make it such easy to understand.
👏👏👏 Understandable..... Thank you sir!!
What A explanation!!!!! Nice......
Very very good video sir
Weldone
Best explanation ever..
Explained nicely .thankyou
thank you sir, clearly explained
OMG you my sir, are amazing...
Awesome Lecture 👌😊
Good explanation 💕
Such an excellent explaination
Very effective explanation thank u
Excellent Explanation
Nicely Taught... tank you sir
Very nicely explained
Nice explanation
very clear ..thanks a lot....
u r the 19th wonder sir. handsoff
Bro u made it look Soo easy
Çok teşekkür ediyorum 👍👏👏👏ve Abone oldum
Really thanks
Thank You Sir! 😊😇🙌
Good explanation
Good job 👍
Excellent
Good lucture 👍
U r best
Thank you sir
Super broo....nice lecture MY only suggestion to add animation so that it take less time to learn n more people see effectively
Nice video
I think the direction of pump showing inthe pic is incorrect.It should be from absorber to generator.After all video is good and helpful.
Thank u..
very nice video
thanks sir
THANKSGIVING
Thanks for your very useful and easily informative video. I hope you would provide info on the following:
Wasting Car Radiators Heat Instead of Using it for Air-conditioning
Vapor cyclic refrigeration methods and systems are either 1. Vapor-compression refrigeration; 2. Vapor-absorption refrigeration (no compressor); or 3. Vapor-adsorption refrigeration (no compressor)
In adsorption refrigeration, the refrigerant or adsorbate vapour molecules adsorb onto the surface of a solid instead of dissolving into a liquid. While in an absorption system, an absorber absorbs the refrigerant vapour into a liquid. Adsorption refrigeration also includes a generation process where refrigerant vapour molecules desorb from the solid.
A variant of Vapor-absorption refrigeration is the Electrolux Refrigeration is also known as Domestic Eloctolux refrigeration or sometimes known as Three fluid Refrigeration as it uses three fluids for the cooling process which are ammonia, water and hydrogen. Hydrogen gas is used to increase the rate of evaporation and hence rate of cooling. No pump or compressor is used.
The absorption cycle is similar to the compression cycle, except for the method of raising the pressure of the refrigerant vapor. In the absorption system, the compressor is replaced by an absorber which dissolves the refrigerant in a suitable liquid, a liquid pump which raises the pressure and a generator which, on heat addition, drives off the refrigerant vapor from the high-pressure liquid.
Some work is needed by the liquid pump but, for a given quantity of refrigerant, it is much smaller than needed by the compressor in the vapor compression cycle. In an absorption refrigerator, a suitable combination of refrigerant and absorbent is used. The most common combinations are ammonia (refrigerant) with water (absorbent), and water (refrigerant) with lithium bromide (absorbent).
Adsorption refrigeration was invented by Michael Faraday in 1821, even though the basis of artificial modern refrigeration dates back to 1748 with William Cullen experiments. Adsorption refrigeration technology has been extensively researched in recent 30 years because the operation of an adsorption refrigeration system is often noiseless, non-corrosive and environment friendly.
In the early years of the twentieth century, the vapor absorption cycle using water-ammonia systems or LiBr-water was popular and widely used, but after the development of the vapor compression cycle it lost much of its importance because of its low coefficient of performance (about one fifth of that of the vapor compression cycle).
Absorption refrigerators are a popular alternative to regular compressor refrigerators where electricity is unreliable, costly, or unavailable, where noise from the compressor is problematic, or where surplus heat is available (e.g., from turbine exhausts or industrial processes, or from solar plants), and in recreational vehicles that carry LP gas. It is also used in industrial environments where plentiful waste heat overcomes its inefficiency.
So, Why we Waste Car Radiators Heat Instead of Using it for Air-conditioning? The heat energy in car radiators could eliminate the need for compressors and be used in the generator process in Vapor-absorption or Vapor-adsorption systems for car air-conditioning.
It is better to utilize cars engines surplus heat using adsorption/ absorption systems low efficiency rather than waste energy into air, and using more energy to run compressors.
Not only the World wastes cars’ heat but also consumes huge energy in air-conditioning and refrigeration in too many countries having high solar heat by using compression refrigeration wp.me/p1OEJz-1LZ
Design, cost and effectiveness constrants
@@Dr.AmitMandal But the design is simple; the cost is definitely will not more than compressors and radiators; and surely there is no effectiveness in wasting heat by evaporation to air and use energy to run aircons. The most obvious part is using aircons on warm settings
Kya baat hila dala
excellent
can u tell me at what temp water gets absorbed and seperated by Li Br?
In LiBr-water absorption refrigeration cycle the absorber & evaporator is low pressure, and generator & condensor is high pressure, but why the pump is flowing from generator to absorber.
wow simple explanation sir but can you tell how vacuum is made either by itself by condensing the vapours in heat exchanger or by a pump
By condensing
நன்றி 🙏🙏🙏
Thank you so much sir🙏🙏🙏
Simple and neat explanation😄😄😄
Sir.
Even though it is heat removal process,why heating at generator adding heat, or any method.?
To recover consumed LiBr
How lithium bromide be synthesised
Presently using this technology of thermax make 250 TR system
👍
Please explain about NSPH A and NSPH R With easy example sir
Liked
I have one doubt sir please explain in detail about eveporator temperature and pressure .
The temperature you want, find the stauration pressure by refrigerant table...thats it.
Steam jet refrigeration par be video bano sir please
sir but after refrigerating effect taken place the liquid gets converted into vapour(it absorbs latent heat from closed chamber) know!!
but here water is directly entered in generator,upon the application of heat only the Li-Br solution gets disappear as vapour is directly entered into condensor and the Li-Br again comes to Absorbent...
My question is how refrigerating effect taken in evaporator??
in the form of water??
lokesh vijayan cooling load means, a hot fluid is passed which exchanges heat with water and water gets converted into low pressure vapour and hot fluid gets converted into cold fluid and liberated out
what type of heat exchanger is used?
According to capacity and other parameters ...
Amit Mandal can u make it brief for certain capacity and parameters following heat exchanger is used??
Have u removed any videos of lithium bromide ?
Unlisted
Sir agar picture environment me Rakha h toh water kese evaporate ho jata h kyuki atmospheric pressure par toh water 100c par boil hota h please ans sir
Review Principles of psychometry
sir where the refrigerating effect takes place??
Evaporator
Sir where is double li-br ref system video?
Isn't it same as vapour absorption cycle? Here instead of NH3 we have water and instead of water we have LiBr solution. And why have we provided cooling load rather than refrigeration effect in evaporator?
Ya you have understood it properly.
Sir ish video ko hindi mein banaya
How can we provide cooling in condenser.... And why we can't use that cooling in direct in refrigerator😂😅
watch my lecture on vapor compression cycle, it will be clear...
But my teacher told me there will not be expansion valve 😕
ya , actually the friction resistance of pipe can also act as as an obstacle or throttle valve. But if friction only cannot serve as throttle valve then a valve is needed. Technically throttling process is Present in both the cases.
Thanks sir