Refrigeration Cycle | Vapor Compression Cycle | Animation | #Refrigerationcycle #HVAC

The refrigeration cycle is a thermodynamic process that is used in refrigeration and air conditioning systems to transfer heat from a low-temperature region (typically the conditioned space) to a high-temperature region (typically the surroundings). The purpose of the refrigeration cycle is to maintain a lower temperature in a controlled environment by removing heat from that space.

The refrigeration cycle consists of four main components: the compressor, condenser, expansion valve (or throttle valve), and evaporator. These components work together to circulate a refrigerant, which is a fluid with desirable thermodynamic properties for heat transfer.

Here is a brief overview of the four stages of the refrigeration cycle:

Compression: The refrigerant enters the compressor as a low-pressure vapor and is compressed, increasing its temperature and pressure.

Condensation: The high-pressure, high-temperature refrigerant then flows into the condenser, where it releases heat to the surroundings. As a result, the refrigerant condenses into a high-pressure liquid.

Expansion: The high-pressure liquid refrigerant passes through the expansion valve, which reduces its pressure and temperature. This causes the refrigerant to partially vaporize, entering the next stage as a low-pressure mixture of liquid and vapor.

Evaporation: The low-pressure refrigerant mixture enters the evaporator, where it absorbs heat from the conditioned space, causing the remaining liquid to vaporize. The vaporized refrigerant is then drawn back into the compressor, and the cycle repeats.

By continuously circulating the refrigerant through these stages, the refrigeration cycle removes heat from the conditioned space, keeping it cool, while releasing the absorbed heat to the surroundings.

It's important to note that the refrigeration cycle can be modified and optimized for various applications, such as domestic refrigerators, air conditioners, industrial cooling systems, and more. Different refrigerants and system configurations can be utilized based on specific requirements and environmental considerations.

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[rkolobm]

This is the best video I have ever seen before! 👍🏼🙏

[Classic_Bangla_Media]

I am a Bengali. I don't know understand English properly. I am trying to improve my experience in English. Please pray everyone for me so that I can success in my dream.

[BahatiSungo]

Thanks sir you make me understand God bless you and give you a long time to live

[wilsonafonso]

My Brazilian teacher shared this video with his students.

[Tigerman]

Studying HVAC, love this video! Thank you.

[SheriiSaeed]

Very good explanation in detail thanks.. I'm from Pakistan nice Sir..🎉

[FaisalAlQurooni]

Great video. Out of the condenser though, we have a high pressure and slightly lower temperature due to the latent heat (no phase change heat). What the video says is not very accurate. The remarkable temperature drop takes place in the valve.

[padysrini]

At 1:44, you say low pressure/temp vapor enters compressor. At 3:25, output of evaporator is low pressure/high temp. But next step is input into compressor. Not matching. Or a step is missing.

[genegonzalez]

Listen you clearly don't know the refrigerant cycle. From the compressor the refrigerant is discharged as superheated gas, frim hete tje first stage of cooling is called desuperheating this occurs at the top of the condenser, and it takes up 5% of the condenser. After this the 2nd stage of cooling is called condensation that takes up 85% of the condenser leaving only 10% fro the 3rd stage of cooling called subcooling. If for any reason these three stages of cooling do not take place the refrigerant will not be 100% liquid gas and the TXV valve will not be able to feed the evaporator because the gas will be in both liquid and gas. Remember the TXV creates the pressure drop only olif the refrigerant comes to the valve at 100% liquid. Many technician blame the TXV for their poir knowledge of the refrigeration cycle. If the condenser does not adequately cool the refrigerant there will existt a high (Liquid line pressure drop) in the Liquid line and this high presdure drop, (resistance to flow) will effect the refrigerant bringing it to the TXV in two forms gas and liquid. The Achilles tendon of the refrigerant cycle is in the liquid line its been this way since inception, I REPEAT!! THE KIQUID LINE IS THE WEAKEST POINT IF THE REFRIGERANT CYCLE. MANY MECHANICAL ENGINEERS STILL DON'T UNDERSTAND THIS 😢

[abdellatifhoudaj]

Great job thank u for your explanation very simple and useful

[softel]

Thanks for your kind efforts. And your simplicity in your explanation

[trsarathi]

Nice videos. BUT missing layman's aspects (to me).

What is happening is:
A *medium* is sent in to the hot place. The *medium gets heat* (from our body or from our food).
Then the *medium* is sent outside where the *medium emits the heat* (to atmosphere).

It is always *flow of heat*. Heat flows from hot to cold substance.
There is nothing called *flow of cold*.

Why evaporation & condensing of the refrigerant? Because that is the most efficient way of removing/adding heat to a medium.

The medium (=refrigerant) in most cases is the Freon gas/liquid. Why Freon? Because that gas boils to vapor and condenses to liquid within our *desired* hot/cold temperature range.

1. Evaporator: We receive cold air from.
2. Condenser: We emit hot air to outside.

In a window AC for example,
Evaporator fan blows the cold air. Cools our face and heats the refrigerant.
Condenser fan blows the hot air (to outside ), heats the atmosphere and removes the heat from the refrigerant.

Similarly in Refrigerator:
The evaporator coil is wound around the icebox. Icebox gets cold.
The condenser coil behind the refrigerator heats up our kitchen!

*Watch the video again*.

[JonathanBrettMiller]

Excellent video. Clearly presented information.

[marcosMartins-wnvn]

Que vídeo top , muita bom.congratulations from Brazil

[genegonzalez]

Many technicians blame the TXV valve for a priblem in the refrigerant cycle because they never understand that if the condenser does not put out the fire of the heat of compression and condensation this heat will circulate in the system from one component to the other. The condenser is key, has to be kept clean (fins) and insure that the fans RPM are adecuate. How do you insure this? by keeping up and monitor both SUBCOOLING AND EVAPORATOR SUPERHEAT & COMPRESSOR SUPERHEAT.😊

[ahammedanwar]

Hai sir,
I have doubt,
At starting you said low pressure low temperature vapor is going inside the compressor.,
After the one cycle you saying low pressure medium or high temperature vapor??

How it’s possible??
Please explain i connfused

[patakotisrinivas]

Excellent...if u give values and temperature values also it would have been better..

[danieljurgill]

The close up picture of the expansion valve, should not show it looking like liquid in, and gas out, if it is high pressure liquid in, and low pressure liquid out. Into the valve is HPL, out of expansion valve is LPL. Low pressure liquid does not look like it has bubbles in it.

[yuvaraj]

While explaing about evaporator it is explained that high temp low pr vapour is coming out from the evaporator then it is going to compressor, but initiallu you started explaining compreasor inlet is low temp low pressure vapour, how high temp vapour from evaporator becomes low temperature vapour at compressor inlet? Please clarify this

[shuaibgul]

Sir, in liquid line the condition of refrigerant is high pressure, high temperature liquid.