refrigeration questions and answers (reply guaranteed)
 

for all the guys that has a compresor standing there or wanne make a phase change and dunno what that all means.
i'll try to make it very simple.

Btu =>
hp=>
kWh=>


kcal=>
Psi=>

1 hp h = 0,7457 kWh
1 Btu = 0.293 W
1 kWh = 3,412 Btu
1 kcal = 3,9683 Btu
1 psi = 0.0689476 Bar

example:
1/8 hp is 0.7457 kW / 8= 0,09321 KW =>93W

usefull link (don't freak out when you see all those numbers) :^D
http://metal.co.kr/zhlee/05_living_01_05.htm

i'll update when i've got some more info

I've had done with Physics and thermal dynamics many moons ago ..... don't remind me. Time for you guys to pass whatever exams.;)

THANK YOU VERY MUCH :super:

no tnx ;)

i'll put a guide of how-to choose the right size of insulation
somewhere @ monday, tuesday

maybe some calculationsmethods voor lenght of captubes?
if you have some
my major concern...
wanna build a phase change unit this summer
ma mom is scared if i talk about rippin' a compressor from an old freezer or somethin and she wants me to buy a new one, and she even wanted to pay it, so she'll prolly help me buy that :)
don't know where to get captube yet, but I'll ask the same person... ( sell's and fixed householdstuff, so he'll prolly be able to help me...)
got a friend at my mom's work that wants to make me a evap to
daddy needs somethin' to braze his "tandem" with, so I'll buy that together with him to...
did I overlook somethin'?


grtz

where is that line reffering too

if you use another frigen i guess ( frigen -> coolingliquid)

a) For R404A/R507
...
b) Then for R22/R290
...

why make 2 example's then, if it is the same :grum:

I think he ment that for propane, just take the same lenght of the other ones. you know 3M for 150 watt en then shorten or lenghten with 30cm for 15 watt differences
and shorten the total 30cm because your using propane.

and that first chart is nice, but nor really usefull when you need to make a system and not replace the captube of an existing system :)
but could be handy yes...

ty kindly ;)


grtz

Found these links a while ago.
Some of you may have found them too, others who are interested and haven't seen these guides yet :

XtremeSystems Forum



really interesting and worth a look


hf

grtz

hey tnx;)

Just red them once again :D
Can't wait to make one my own...

prolly not until this summer


anyways, you'll hear from me :p
prolly will first keepon building some watercoolingstuff


grtz

me too, blood is flooding, maybe make one back but that insulation:(

think i'll try the chiller first. w'll see how it turns out

I wanted to make on myself too, but I gave up the idea because of the rather high price (need wc first for waterchiller and for dd I'll need filling gauges and gasses)

If you build your watercooling yourself, it's pretty cheap dude.
The most expensive thing on my watercooling are my fans wich costed me 45€ together.

And as for the gasses... I was thinking to use Propane...
Don't know yet... It's cheap and effective. It's flammable though...
But a normal single stage system doesn't contain that much gas.
So in order to blow your pc, you'de need enough propane that leaked and a spark... And I'm not sure if it would blow up neither.
Anyways... be sure there are no leaks hah :super:

The most expensive thing about it is prolly the compressor or the condensor. Especially if you have to buy it new.
Been looking for a compressor and a condensor for a while but they don't put them on street corners don't they...


grtz

If you are lucky, you can find an old a/c unit on a containerpark.

Then you only have to convince the boss (or just put in in your car as fast as possible and race away at 150/u :grin: )

mja

went to the containerpark, and they have a container for refrigerationstuff only
but the b*tch was locked :grum:

didn't have the time to ask the 'boss' because I was with my dad and we didn't have that much time...

went to some compagnies that do refrigeration and stuff to. one of them was 'blomberg' maybe you heard of them.
a few years back there were always deepfreezers and "frigo's" in front of there house and you could just ask if you were allowed to take something with you because it was all scratch. But they've stopped doing this so that was a no go too...

darn

but "de aanhouder wint", so I'll keepon lookin...

upcomming exams don't do any good too...

you evil dude:grin:



:^D

a phase-change isn't expencive if you have the right tools already.

I know :^D

Now I'm actualy rethinking about doing some phase change in the summer vacations.
Dunno wheter I'm going for a waterchiller or direct die, but first I'll have to find a job for the weekends (to buy a sweet A64 setup :grin: and then saving for the PC stuff)

Maybe people are interested in Autocascades and Multiple Stages Cascades?

Cascades by Chilly1

Autocascades by Chilly1


I think it's pretty interesting, so I figured some people @ MadShrimps would think the same :o

Not simple tough, but multistage rules :grin: -128° load

- 159°C Idle :grin:

I agree with you on the multiple stages
but the autocascades seem pretty tempting

but first need to complete a 'simple' single stage

Autocasced seems not so easy. I've read about it long time a go.



Ok, let's see if I can remember, the black thing is the compresser, the red line is the discharge line, where the refrigerants leave (as a gas).
The first radiator (condensor), is where the first refrigerant will condense, the other one will stay a gas and wil move on at the top. The thing next to it will prolly make sure that the 2 gasses will split.

Then the blue refrigerant will go throug the cap tube and cool the condensor (using an evaporator) of the second (red) refrigerant.
The blue refrigerant returns to the compressor.

The red refrigerant (wich needs the low temps to condense) will turn blue (in the pic :D ) and then go throug the cap, to the evap on the cpu and will then return.

I'm I right or did I make a mistake ?

To me the only advantage of this is that it's compacter, but it needs a strong compressor (doesn't save money), it's complicated, ...

i think the main reason of this installation is that the liquid that enters the cappilair is chilled by sort a second loop

edit: looked in the topic and what did i find:D, guess i was right

kristos asked me to explain all the components of the tristage-cascade so here it is

@ Autocascade

It's a bit more complicated than a normal single stage.
You're right about everything and the 'thing next to the condensor' also servers as an oil reseptor or how do you call it, so that there wouldn't go any oil in the evaporatorhead.

You don't have to buy a new compressor for this kinda stuff ha.
If I could find a 3/4hp compressor or something I'd give it a try someday. But I'd rather build a single stage first :)
Also, gasses can be cheap. (how much will propane and CO² cost you?)

It just seems ... ingenius...(if that's correct english. it should mean 'ingenieus' :p)

anyways, keep up the good work

catch ya later

need someone to double check:

9000 btu = 3.537pk right?

2637 is what i get

1btu =>0.293pk
edit=>1 Btu = 0.293 W

a 9000 btu compressor would be 2637, that can't be right, can it?

1 Btu = 0.293 W

2637W isn't that mutch

from btu too kJ too pk I'm again at 3.537pk

thats right ;)
there are compressors from 30pk so :grin:

hmmm... do I here a Heliumstage?:p

rofl