Need help condenser size cap tube etc ?

[Arky]

lo all

As im sure some of you know, I have recently changed the gas in my prommy to R404a :) and it is running cooler, but i want to get it even cooler, and have found the noise of the prommy fans on full speed is to loud, so am now thinking of replacing the 5" by 5" condenser with something around 7" by 9", is this as simple as just soldering the new one in and regasing it or do i have to mess around with cap tubing ???? (would rather not if i can get away with it)

Arky

thxs for any help

wheres Bowman :D

[CodeRed]

Arky,

You shouldnt need a bigger condensor. In fact you'll get the best loaded temps if the r404a is a little warm (say 30 to 35deg C) when it exits the condensor. I am not exactly sure why but it was explained to me that the warmer liquid doesnt need as much room in the evaporator to fully evaporate than really cold liquid. Getting total evaporation is key to getting low temps. Try your fans on low and see if your temps drop .. I know this goes against your gut instinct, but it works on mine. Also feel the dryer to guage the temp of the liquid exiting the condensor, this is the best place measure this.

As for the cap tube, it would be a §§§§§ to replace the whole length, so I suggest cutting it (in the coiled part) and add some extra of the same diameter. You will probably have to experiment as the best length is dependant on a large number of factors, eg heat load, and suction pressure. Start with 150mm extra and work your way up in say 50mm steps. It may take a number of attempts.

BTW I havent done the cap tube mod so this is really only guess work ATM.

[bowman1964]

well i am here.LOL was out yesterday and getting ready to hit the lake in a few minutes.

well the colder condensor thing is a who" who oppion thing.everyone have one.
but the evaperator is at the heart of the problem.what i mean is yes you need total evaperation of refrigerant for the best effecientcy.but on the other hand if the evaperator has enough channels to do that colder refrigerant will help.thats why we subcool refrigerantion systems in general.by dropping the incoming refrigerant say 20c this can decrease the evaperator temp 10c more.all depends on the system.
each is differant.
as i dont have a prommy to play with i cannt say for sure.

but be carefull with cutting the cap tuing.i do cut mine,but you must be very careful not to have one piece of trash or even a piece of solder residue get into the line.if you do the system will not work.

as for warming the refrigerant....it cannt hurt to try... as you do is let the condensor warm up,block of the air and watch the temps.i personly dont think it will help but make it wourse but like i said i dont have a prommy to play with or i would try for you .

i will be back later if this doesnt help

[Arky]

well tried fans on full chat with a house fan blowing on it aswell and temp -38c full load.
with air flow blocked temps went up -34c and raising so stoped that.

So what ya think ???

want to get temps lower, so you don't think a bigger condenser will improve it atall ???

Arky

[CodeRed]

Originally posted by Arky
well tried fans on full chat with a house fan blowing on it aswell and temp -38c full load.
with air flow blocked temps went up -34c and raising so stoped that.

So what ya think ???

want to get temps lower, so you don't think a bigger condenser will improve it atall ???

Arky

Dont block the whole condensor, just block it a bit to restrict air flow.

Anyway, -38 @ full load is approx what I get with r404a. This was testing with a XP2100+ @ 2.25V (2600 MHz & 2850 MHz).

[bowman1964]

yes i would have to say -38c is pretty good with a amd chip.

ok if you want to see how a bigger cond would help first you need to measure the temp of the refrigerant.check the temp at the drier.if the condesor is keeping the drier at a few degrees above room temp nothing will help it.but if the drier is 5 to 10c hotter than room temp yes you will need more air flow or a larger condensor.
the best a condensor can ever hope for is to get the refigerant back down to room temp.after that no matter how large of a condensor you have it wont make a differance.

[Arky]

well it's a P4--2.26 @ 3.06 1.65V :confused:

Will check temps l8er thx

Arky