what is the difference in refridgeration terms between fx10, r408a, r502, and r404a.?

Answer 1

Hi Pollyann,
Freon, bless it.
In the Mid-east, my air-con & refrigeration guys had to explain to me the difference between, say, r404 & r408.
First off the re-charge bottles are a different colour !
There was a small stock of something called x908, In big red bottles, and I dread to think what they used that stuff for.
But it all has to do with horses for courses, in that different grades operate best at different pressures.

You could use a mild-mannered 101 (little green bottle) in re-charging a UK domestic fridge, which though would be useless in a big roof- top jobby on the top of a Mid-East hotel / office block for central air-con.
I could qoute figures as to evaporation / compression ratios, and name the correct item & grade for a specific job, but it equates to "do not put deisel in your petrol lawn-mower, or equally unadvisable to stick parrafin in the helicopter". (Although that will work for a while if the engine is nice and hot)

I dislike refidgerants, as you can't dispose of the stuff effectively, even aerosol cans. But what can you do in a hot country with millions of air-cons, freezers, fridges, cars with A/C, etc ?

Beyond me, and anyway I prefer the heat when I work in hotter climes, but I don't want my steaks to go soft & rotten in the freezer.
Also, stick another log on the fire.
I guess I can't win !

Bob.

Answer 2

The change of state is different for all of them. So the ones with a lower change of state temperature is better for the colder systems.

Answer 3

There all multi gas refrigerants which should be added to a system as a liquid.

Answer 4

they are different types of refrigerant for different applications. i.e. evaporation point and pressure. one other point there is no d in refrigeration but there is in fridge.

Answer 5

they are all refrigerants. (different types)