A/C freon and sealant question

[pilotinsky]

Found this product online

http://www.youtube.com/watch?v=vAULfI8-Wwk

Not sure if it can be used in AC system of airplanes?

Another question is what type of freon/refrigerant and compressor oil most of heavy jets are using?

As of system, I read somewhere it's a type of turbine compressor using the ram air or bleed air?

....It makes my summer days cooler by thinking of the AC systems....thanks

 

[seagull]

All of the ones I have flown have NO refrigerant. They use air conditions packs that compression heat the air to high temps then cool it and then decompress it so it gets very cold. System features prevent freezing by removing the water and hopefully not getting below freezing. Warm air is added downstream to raise the temps to what is required for the demand. Most use bleed air these days.

 

[pilotinsky]

All of the ones I have flown have NO refrigerant. They use air conditions packs that compression heat the air to high temps then cool it and then decompress it so it gets very cold. System features prevent freezing by removing the water and hopefully not getting below freezing. Warm air is added downstream to raise the temps to what is required for the demand. Most use bleed air these days.

Thank you for sharing the experience；can you tell me what type of airplanes were they?

 

[KSCessnaDriver]

All of the ones I have flown have NO refrigerant. They use air conditions packs that compression heat the air to high temps then cool it and then decompress it so it gets very cold. System features prevent freezing by removing the water and hopefully not getting below freezing. Warm air is added downstream to raise the temps to what is required for the demand. Most use bleed air these days.

Yeah, not on anything powered by a piston engine. All of the piston powered, air conditioned planes I've flown use a system very similar to a car.

 

[TFaudree_ERAU]

Yeah, not on anything powered by a piston engine. All of the piston powered, air conditioned planes I've flown use a system very similar to a car.

As do Lear 55s and 60s.

 

[roundout]

As do Lear 55s and 60s.

Yeah, not on anything powered by a piston engine. All of the piston powered, air conditioned planes I've flown use a system very similar to a car.

As do Lear 35s, some King Airs (only have experience in an old C90 and a 200), and some Citation Mustangs (sat in one at an air show once plugged in to a GPU in air conditioned comfort).

 

[KSCessnaDriver]

As do Lear 55s and 60s.

Interesting. All I know is, on a PA28, the air conditioning worked better as a speed brake than it did as a means to cool the cabin, while in the air. It worked well on the ground, but that's about it.

 

[pilotinsky]

As do Lear 35s, some King Airs (only have experience in an old C90 and a 200), and some Citation Mustangs (sat in one at an air show once plugged in to a GPU in air conditioned comfort).

As do Lear 55s and 60s.

Do you know what type of refregant the system use?

I know my car uses R-134a

Thanks

 

[roundout]

Do you know what type of refregant the system use?

I know my car uses R-134a

Thanks

Old stuff. 134a wasn't around back when when these airplanes were spring chickens. It's also not a matter of just different refrigerant in the system. Systems designed for R12 have different operating pressures, and the compressors are designed as such. The orifices in the condensor and other plumbing and also the expansion valve are also different. Lastly, the oils which lubricate the system are not compatible. R12 uses mineral oil and 134a uses a synthetic oil called PAG.

Probably more than you wanted to know. The Citation Mustang I mentioned I'm not sure about. It may be R134a. THe oldies are certainly R12.

 

[seagull]

Thank you for sharing the experience；can you tell me what type of airplanes were they?

B727, B747, DC8 70 series, DC10, MD11, A300 and I know that the MD80, L1011, and most others are the same.