So, I’ve looked at about four different videos trying to figure out how refrigerants work and they have all left me with more questions than answers. Your video was actually the first one where I felt like I totally understood what a refrigerant is. Thanks a lot mate!!
Watched four different videos on this subject and all left me scratching my head. Then I watched this video with the same exact terminology and theory but explained completely different than the others and it made perfect sense. Goes to show why good teachers are important. You can have a bunch of teachers teaching on the same subject matter but one makes sense and the others don’t. The way you are being taught is just as important as what your being taught. Great Job!!
Phenomenal explanation! You just helped me turn months of confusion, uncertainty and anxiety into understanding. I realize that the information I was being taught was indeed correct, but somehow since I am not working in the field, I was unable to connect the dots to understand as I do now. Thank You very much!
Always had some trouble understanding the concept of refrigeration. This video gave a thorough explanation with step by step process of the entire cycle. The numbered illustration which was animated provided me a clear understanding of the refrigeration process. For someone who sometimes struggled in school, this was a godsend. Thanks very much.
thank you so much you cleared my some doubt in this video, pls sir its my request u will make some video about static pressure in HVAC and how they calculated
@@VenomSkywalker. refrigerant is just the stuff inside the lines that causes the fridge to get cold. Same thing as an air conditioner just slightly different for lower temps
Thank you so much. Yours is an excellent description of the processes and the sciences behind each stage by explaining it with familiar examples like boiling water and spray can.
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Temperature and pressure are related. The saturation temperature of a substance is the temp at which it will change state from a vapor to a liquid or vice versa. The saturation temp depends on pressure. The high temp high pressure liquid refrigerant passes through the metering device. The metering device and compressor creates a pressure differential. So when the refrigerant passes through the metering device its pressure and temperature drops. So now the refrigerant temperature and saturation temperature is lower than the temperature in the space we are trying to cool. Heat moves from hot to cold so when air is passed through the evaporator coil it the refrigerant absorbs heat from the air. The refrigerant will remain as a liquid until it has absorbed enough heat to evaporate. The state change from a liquid to a vapor is where most of the cooling comes from. The liquid refrigerant has to absorb a lot of heat before it will evaporate and start increasing in temperature.
This was a nice explaination EXCEPT for two major issues. 1. The refrigerant in State-1 is a superheated vapor and is NOT in its saturation state! If it was, this would pose a problem to the compressor which is a "vapor" pump. It can not and does not want to see any liquid! 2. Inversly, in State-2, at the output of the condenser, the refrigerant is in a high temperature-high pressure sub-cooled liquid. The refrigerant needs to be 100% sub-cooled liquid when entering the evaporator. This is where you want all of the absorbing of heat going on, not in the liquid line.
Your video made my every doubt clear, your explanation was very simple but damn high concept, Thanks brother, I will suggest other people to subscribe your channel, your explanation is superb.
The emf generated by the external energy , separates charge carrier (electron) from the atom of copper coil in generator similarly the energy breaks the atom of refregerent to make it vapor and hence the liquid becomes somewhat cooler. Thanks from BD.
I don't understand. If the refrigerant's boiling point is so low. Then what really makes the refrigerant become liquid again? Moving air alone can't get to minus 26 degree Celsius on its own. So what's dropping the temperature to below minus 26 degree to condensate the refrigerant to liquid form?? I must be missing something.
I know it's been two years, but the compressor compresses the vapor into a liquid and packs it into the high pressure line where it can stay a liquid for a moment
Could you please make a video on VRF/VRV - especially outlining how the heat recovery function works so that heating and cooling can be carried out simultaneously?
It's worth mentioning that the vapor entering the compressor is superheated, and the liquid entering the TEV is sub-cooled. Remember folks condensers reject latent heat and evaporators absorb latent heat.
The Compressor compresses from state 1 to 2, and increases pressure, and temperature. Yet the (T, s) graph on the top left shows that the transformation 1 to 2 is isothermal (T is constant). Is the (T, s) graph wrong? Sorry if I missed something.
Doesn’t the refrigerants boiling point change at the different pressure value? So after the condenser it actually turns into liquid even though temperature is most likely not below -26C.
6:57 the pressure does not decrease in the cans the liquid absorb some heat to become gas and maintain the pressure the pressure will decrease only when there is no liquid in the can
so correct me if i'm wrong but long story short, the refrigerant gets heated up (pressurized), all that heat is blown outside to make it easier to cool down when its depressurized, then once its depressurized, it passes across another fan that blows cooled air inside?
I have worked as mechanical engineer for many years for a major petrochemical refinery. among other maintenance areas of Lube and Fuel refineries I was in charge of the FEU unit where and the refrigeration unit was part it to get the wax out. I was also responsible for the centrifugal compressor and was trained to troubleshoot the refrigeration centrifugal compressor doing vibration analysis using Bentley Nevada instruments. We used to send out the control valves for calibration to the workshop and the instrumentation department would get the requirements from operations for calibration of TXV? Could u please do a video on calibration of TXV? Thanks, the video was super interesting
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Refrigerant also condenses at higher temperature at higher pressure and it facilitates dumping out heat just like it evaporates at lower temperature at lower pressure and it facilitated absorption of heat?
The liquid accumulator at (C) is missing and the (red) compressor gas outlet appears to be going the wrong way but this might be a facet of the monitor resolution playing tricks on the eyes. Otherwise an excellent video.
so does the boiling point rise with the higher pressure? i thought 410a boiled above -50-60F, so if it leaves the compressor, it would seem like it would most definitely be a vapor, unless the increased pressure makes that boiling point rise substantially.
