DIY - need help, can't handle load

[RaVeN155]

Hello

I have problem with my phase-change system. Parts:

Danfoss sc12cl
1,9kW condenser
DIY evap
ALCO drier
ss hose
and 0,7mm capilary tube

The system is charged with 404a.
I've tried 2m 1,5m and now 1m of cap tube. System must handle quite big load 170-200W. I dont know why it cant handle load.
2000mhz-1,65v -48C
2400mhz-1,85v -46C
Temps are fine if load is small, but if cpu is running 2400mhz 2,3v i cant get any normal (stable)temps. Even when i try 2,15v temps are not stable under load.

evap (http://members.lycos.co.uk/lukaszkras/Prison_Parownik.JPG)

What can i do :confused:
THX for any help

[Gary Lloyd]

1.5-2M should be just about right.

[RaVeN155]

Maybe my cap tube is blocked or something, becouse i rise it from 1 to 1,5m and load that it handle is the same. I hate cap tubes :(
Must buy hav from berkut ;)

Another question, i read that compressor should be quite hot. But i cant touch it more than 1s. Isn't it too hot?

[Gary Lloyd]

Maybe the cap tube isn't the problem. You haven't given us enough information to even know if there is a problem.

[RaVeN155]

Yes, i also thought about other parts. But freon turn to liquid properly, i checked it (i have round thing with window, dont know english name :P) I also changed drier.

I turned off fan on condenser and then system can handle bigger load but it was more than 20bar on high. This experiment was berkut idea.

I will try to change cap tube, I hope that it will work better.

[Gary Lloyd]

Exactly why do you think it can't handle the load? Give us a clue or two.

[RaVeN155]

2v 2400mhz idle -43 to -50 (depends on refrigerant amount)
2v 2400mhz load (prime95) and temps goes up to -10, than i exit prime, becouse it is too much.

And the same is with any more voltage than 1,85 and 2200mhz...

Never had that problem with my systems :(

[Gary Lloyd]

Is that the temp of your evap block? CPU? Suction line? What?

What are your pressures?

What is the temp of your suction line near the compressor?

Is the suction line frosted?

What is the temp of the liquid line?

What are the condenser air in and air out temps?

[RaVeN155]

This is evap temp. Pressures: 12-13bar on high and -0,2 to 0,2 on low side. Pressures depends on refrigerant amount.

I dont know suction line temp near compressor. Maybe 10C? i dont know, but it isnt frosted on that load (2v 2400mhz idle). Its frosted only when load is very small, like 1600mhz 1,5v.

Liquid line is after condenser? If yes, it have room temp. Before condenser its hot.

Condenser fan is set to max rpm and condenser is quite big. Air in and out are almost the same i think=room temp, maybe out is 1C more?

I'm sorry that I cant give you precision temps. Anyway thanks for all help :)

[Gary Lloyd]

I would take it up to maximum load, and add refrigerant a little at a time, waiting fifteen minutes in between, until the lowest evap temp is achieved.

Without line temps, we can't tell if the cap tube is too restrictive or not.

"Room temp" is not a temperature. My room may have a different temp than your room.

[RaVeN155]

Hello!

I decided to rebuild that system. And I just found this:

http://fach.pl/produkty/pz.jpg

Nozzle is 1mm. I can buy with 1,2mm too.

Inlet is 6mm, outlet 12mm.

What do you think about it? Made in poland :eek: , this is a presostatic discharge valve.