I am working in a brewery where we are using gas CO2.
I got a recurent concern on CO2 distribution and would appreciate if someone can give me some guidance.
In cold season (10°C, outside ambient T°), I got an atmospheric vaporizer (working @ 15 bar,coming from CO2 storage tank) which is most of the time half frozen and the other half free of any ice.
This make me guess that I got enough capacity for my demand downstream and that my T° outlet of my evaporator should be about ambient T° (~10°C).
My plate on my vaporizer state units that I am not familiar with: 300 VMC/HR? does someone know those unit?
Farther down, as soon as CO2 reach my reducing station (15/6 bar), I got my pipe uninsulated, and my downstream filter which are full of ice!!
1. First, I am surprised to be so cold because the Mollier diagram show that the isoT° is rather vertical and can barely explain such a big drop of T°
2. I got sometimes my pipes which is blocked and no CO2 flows through. Again, back, in my mollier diagram, I can see that I cannot have CO2 in another form than gas (@6bar,0 to -10°C), so gas cannot block my pipes!! Can someone confirm?
3. If CO2 can only be in the gas form,the only thing which can block my circulation is frozen water coming from a bad CO2 recovery (maily driers in poor shape). Is it making sense?
Thanks for your feedback,