compressor icing....

[naruto1511]

hi guyz ...

Regarding the issues of ice buid up, I know some of u think that its a stupid question to ask ( coz no reply ). For the chilled water inlet, we are not able to reduced the water temp due to standardization in the factory itself. So pls to advise what should I do in order to eliminate the ice but at the same time without touching the chilled water supply ( 11deg C ) and also to maintain the performance ( to achieve -70deg C ).

Pls to guide me.

Thanx.

[The MG Pony]

Insulate the lines? use a dehumidifier? put drip try under the compressor to catch water? Pay a guy to go through and check the entire system for proper operating?

OR You could add much more information about the problem and details, perhaps even some pictures, so we have, at the very least, a vague clue as to what your talking about!

[chillin out]

hi guyz ...

Regarding the issues of ice buid up, I know some of u think that its a stupid question to ask ( coz no reply ).

You closed the thread when you posted it.

Try and reply to it your self and you will see.

Chillin

[naruto1511]

hi guyz ...

1st, thanx for responding. 2nd, sorry for provide u guyz with less data. This thermal shock chamber (-180~+200) using R22 (high stage) & R23 (low stage). R22 - 8.5kg, R23 - 6kg. R22 used water condenser (chilled water; 11degC / 6bar inlet). Both compressor semi-hermetic (3.75kW). R22 high pressure running - 11~13kgf/cm2. R23 high pressure - 12~15kgf/cm2.

The problem : ice fully covered both compressor after more than 1 day machine run.

So I need technical advise on how to eliminate or at least reduced the ice without need to replaced the whole water supply system coz the chilled water piping is connected to the whole factory.

Thanx.

[lana]

Hi there,

Did you check if there is flood back?

I suggest that you measure the superheat and make sure that there is no liquid going into the compressors.
If there is no flood back then there must be high humidity in the machine room which causes the frosting.

Good luck
Regards

[Cofreth]

Can R23 pull down to -180 degree C or F?
I only know of liquid nitrogen only.

[lana]

Can R23 pull down to -180 degree C or F?
I only know of liquid nitrogen only.

I don't think so.
The minimum temperature should be -90°C to -100°C.

[US Iceman]

Ice or frost by itself does not indicate liquid slugging of the compressor is occurring. Ice or frost only tells you that the surface temperature is below 0°C (32°F).

If you have a reasonable suction and discharge superheat on any compressor you can quickly find if you have liquid slugging taking place.

[naruto1511]

sorry again, wrongly type .... not -180 but -80..... anyway, thanx for all thoughts...

[RAC'ers 98]

Please try to check also the sensor of your expansion valve. Try clean it at least with sand paper and put it back tightly as I believe it controls the opening of the orifice. Have tried it before and it works as it controls liquid refrigerant from entering the compressor. Just make it a try...

regards,
Rac'ers 98

[chefid]

is there a water regulating valve? if so close it a little bit bring up the head pressure on high side. it just might clear up both compressors

[chan]

At - 80 You Cannot Stp Ice Forming Unless You Re Heat. What Is The Problem?