How the heck does A/C actually cool air? SCIENCE GARAGE
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Date: 2019-10-24
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Comments and reviews: 9
mecánico en la frontera
The new cars from 2018 in the U. S. started using 1234yf which is more expensive because not many cars have it like r134a. r134a is easy to use and is easier to get a hold of. The older chemical was if you have a car from 1992 or older that had air conditioning as an option was r12 and was even colder than the other chemicals but was more harmful to the environment if exposed to the atmosphere which is why its much harder to get a hold of and in some cases you need a certification or license to purchase that chemical. If you have an air conditioner in your car that takes r12 dont convert it. Sure their are converters that can convert it into r134a because its cheaper when you want to recharge your A/C but r12 is the superior chemical its definitely worth the money to take it to a shop to get your r12 A/C recharged most people that had cars around that early 90s and 80s say that the A/C in cars are getting worse.
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The new cars from 2018 in the U. S. started using 1234yf which is more expensive because not many cars have it like r134a. r134a is easy to use and is easier to get a hold of. The older chemical was if you have a car from 1992 or older that had air conditioning as an option was r12 and was even colder than the other chemicals but was more harmful to the environment if exposed to the atmosphere which is why its much harder to get a hold of and in some cases you need a certification or license to purchase that chemical. If you have an air conditioner in your car that takes r12 dont convert it. Sure their are converters that can convert it into r134a because its cheaper when you want to recharge your A/C but r12 is the superior chemical its definitely worth the money to take it to a shop to get your r12 A/C recharged most people that had cars around that early 90s and 80s say that the A/C in cars are getting worse.
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Stockholm
Couple small corrections, -Nowadays car A/C systems use HFCs (HFC-134a) rather than HCFCs (which you normally find in old central/window A/C units, I. E. HCFC-22. HFCs are soon to be phased out in favor of HFOs in car A/C. -The condenser is in front of the radiator, not behind it. So DIY guys, don't unbolt the thing in the front when trying to change engine coolant. -Car A/C systems do over time leak a small amount of refrigerant over time, but it normally isn't enough to lessen effectiveness in the system. If a significant amount of refrigerant is lost in a short amount of time, then you have a leak. I don't recommend using A/C sealers because they have a habit of clogging stuff, use UV leak dye instead to find then fix the leak. Also be sure to use the proper refrigerant type, there's a sticker underneath the hood indicating the proper type. Other than that, good video and solid explanation.
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Couple small corrections, -Nowadays car A/C systems use HFCs (HFC-134a) rather than HCFCs (which you normally find in old central/window A/C units, I. E. HCFC-22. HFCs are soon to be phased out in favor of HFOs in car A/C. -The condenser is in front of the radiator, not behind it. So DIY guys, don't unbolt the thing in the front when trying to change engine coolant. -Car A/C systems do over time leak a small amount of refrigerant over time, but it normally isn't enough to lessen effectiveness in the system. If a significant amount of refrigerant is lost in a short amount of time, then you have a leak. I don't recommend using A/C sealers because they have a habit of clogging stuff, use UV leak dye instead to find then fix the leak. Also be sure to use the proper refrigerant type, there's a sticker underneath the hood indicating the proper type. Other than that, good video and solid explanation.
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Adam Morabito
All refrigeration systems are hermetically sealed, and the refrigerant and compressor oil inside them lasts forever. If your car's AC is low on refrigerant it means there is a leak somewhere in the system. The leak must be fixed before adding refrigerant. When air mixes with the refrigerant, it'll eventually create a corrosive acid that will destroy the internals of the system. These charge kits are a complete scam. They may get your damaged AC system blowing cold again, but only for a short time. It's only a matter of time before catastrophic damage occurs. Not only that but there's no way to really tell how much charge is in the system using these kits. AC systems require a precise amount of refrigerant and oil to function optimally. For this you either need a manifold gauge set and refrigeration scale or a machine shops and dealers use to recover, evacuate and recharge AC systems.
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All refrigeration systems are hermetically sealed, and the refrigerant and compressor oil inside them lasts forever. If your car's AC is low on refrigerant it means there is a leak somewhere in the system. The leak must be fixed before adding refrigerant. When air mixes with the refrigerant, it'll eventually create a corrosive acid that will destroy the internals of the system. These charge kits are a complete scam. They may get your damaged AC system blowing cold again, but only for a short time. It's only a matter of time before catastrophic damage occurs. Not only that but there's no way to really tell how much charge is in the system using these kits. AC systems require a precise amount of refrigerant and oil to function optimally. For this you either need a manifold gauge set and refrigeration scale or a machine shops and dealers use to recover, evacuate and recharge AC systems.
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Alan Hilder
Ignoring the change to liquid, You compress gas it gets hot. while at high pressure you let the heat radiate away into the air to ambient temperature. Now allow the pressure to drop back to normal and it will be cool. The change to liquid is used as the change of state increases the energy being able to be held by the medium, You CAN NOT compress a liquid. The first room Air Con was a hand driven bellows pushing the compressed air into a tank of salt water to filter the air, it was a fever hospital trying to filter out dirty air. They found the air in the room was cooled slightly ( about 1 degree or so ) someone noticed and studied the effect. so ACs are to clean up dirty air. If you cool the compressed gas outside, you cool the air inside. If you cool the compressed gas inside, you warn the air inside. Reverse cycle AC
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Ignoring the change to liquid, You compress gas it gets hot. while at high pressure you let the heat radiate away into the air to ambient temperature. Now allow the pressure to drop back to normal and it will be cool. The change to liquid is used as the change of state increases the energy being able to be held by the medium, You CAN NOT compress a liquid. The first room Air Con was a hand driven bellows pushing the compressed air into a tank of salt water to filter the air, it was a fever hospital trying to filter out dirty air. They found the air in the room was cooled slightly ( about 1 degree or so ) someone noticed and studied the effect. so ACs are to clean up dirty air. If you cool the compressed gas outside, you cool the air inside. If you cool the compressed gas inside, you warn the air inside. Reverse cycle AC
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Blake Meche
Topping it off WILL NEVER WORK for R134. You are just going to waste your money. Your car AC system requires a specific weight range of refrigerant to work. If it wears out and you just add more, you will over pressurize the system and it still wont blow cold(ok it might for a short period of time, and you might break something. The only way to do it right is to have your AC system drained into an appropriate waste container, put it under vaccuum, then refill it with the specified weight of refrigerant (and oil if needed.
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Topping it off WILL NEVER WORK for R134. You are just going to waste your money. Your car AC system requires a specific weight range of refrigerant to work. If it wears out and you just add more, you will over pressurize the system and it still wont blow cold(ok it might for a short period of time, and you might break something. The only way to do it right is to have your AC system drained into an appropriate waste container, put it under vaccuum, then refill it with the specified weight of refrigerant (and oil if needed.
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Rusty Shackleford
Refrigerant doesnt just run out, you shouldnt just have to top it up. This is one of the biggest scams in the automotive industry. All air conditioning and refrigeration systems are closed loop systems. The only time the refrigerant will run out is if there is a LEAK, and if there is, the leak should be fixed before it is topped up. If a mechanic ever says your ac needs to be topped up, you should be telling him to find the leak. Source, years of work as an HVACR mechanic
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Refrigerant doesnt just run out, you shouldnt just have to top it up. This is one of the biggest scams in the automotive industry. All air conditioning and refrigeration systems are closed loop systems. The only time the refrigerant will run out is if there is a LEAK, and if there is, the leak should be fixed before it is topped up. If a mechanic ever says your ac needs to be topped up, you should be telling him to find the leak. Source, years of work as an HVACR mechanic
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Micah AP
I habe to do it again Releasing pressure is not releasing heat energy What actually happens is the pressurized contents cannot hold as much heat energy when compresed. That's why it feels hot on the condenser. Its releasing energy when compressed. Not vice versa. When it expands it can hold more heat energy and start absorbing the heat around it. Thus it feels cold
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I habe to do it again Releasing pressure is not releasing heat energy What actually happens is the pressurized contents cannot hold as much heat energy when compresed. That's why it feels hot on the condenser. Its releasing energy when compressed. Not vice versa. When it expands it can hold more heat energy and start absorbing the heat around it. Thus it feels cold
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dpool741
WARNING ABOUT THE AC CHARGER: Something else can go wrong which can cause the high pressure side to be too high. This happened to my car. It CAN damage your car if you overcharge it. Have both the low and the high pressure side checked before adding more refrigerant to your car.
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WARNING ABOUT THE AC CHARGER: Something else can go wrong which can cause the high pressure side to be too high. This happened to my car. It CAN damage your car if you overcharge it. Have both the low and the high pressure side checked before adding more refrigerant to your car.
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Tony Johnson
They did not invent freon, they developed a refrigerant. Freon was a brand name for dupont refrigerants. There was Freon 22, Freon 12, Freon 502, and a few others at that time. Do not continue to call refrigerants Freon, you are spreading misinformation.
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They did not invent freon, they developed a refrigerant. Freon was a brand name for dupont refrigerants. There was Freon 22, Freon 12, Freon 502, and a few others at that time. Do not continue to call refrigerants Freon, you are spreading misinformation.
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