Restrictions on dry ice soon?

CannaBusiness
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141

Liquid co2 is far easier to purchase than ln2.

You know, for testing purposes

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142

I donā€™t see why you couldnā€™t, but I wonā€™t tell you that you can.

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143

Letā€™s ask

@Graywolf
@Future
@Dred_pirate
@cyclopath

Can you guys explain to us how a counter flow coil works with liquid co2 or ln2

Iā€™m under the impression it takes a PRV at the end to allow for it vent, but Iā€™m ignorant and need a spoon

Maybe itā€™s just ln2ā€¦ :man_shrugging:

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144

Definitely need to vent it, that Iā€™m sure of.

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145

For sure

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146

@downtheterphole @Roguelab @Lincoln20XX

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147

take your liquid refrigerant and put it through a small tube and a regulating device and send it into your coil in coil(or shell tube, plate exchanger, whatever) the opposite direction of your fluid to be chilled, then put that newly found refrigerant vapor into a bigger tube that either goes back into a closed loop or is vented appropriately.

*edit put your prv after your tank regulator, before your metering, and in any vessel(hoses, hardpipes) you can seal liquids in

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148

Just enough info. Thank you

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149

Did you use the search bar sir?

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150

Lmao. Yes sir!

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151

Hence why I started summoning those much smarter than myself

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152

I wonder if I can open blast with co2 with a liquid siphon tank

A joke :point_up_2:

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153

I hate to say it, but I donā€™t think its gonna work inside a coil. I think its going to turn to solid carbon dioxide.
Actually this is what MUST be happening in my system too, what ends up in my chilling solution has to be dry ice crystals, and not actual liquid CO2.

Liquid co2 cant exist as a liquid without some pressure behind it to keep it in a liquid state. So what seems to be happening is ā€œLCO2ā€ is turning into tiny crystals when it meets the acetone.

Sorry folks, I strike again :woozy_face:

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154

On second thought, maybe using a counterflow coil could work if you set the prv high enough.

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155

Iā€™ve put my injection coil in my dewar before I had my chiller. It didnā€™t burn off as much as I thought it would

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156

Exactly mine and @Hanselā€™s thoughts. Weā€™re talking about it now

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157

Looks like it would need to be pressurized to above 1000 psi to get liquid at ambient temp into your coil, once its liquid and able to stay liquid then any pressure thats created and then blown off thru a prv will provide you with your evaporative cooling.

158

I donā€™t believe 1000psi is necessary. I believe you need to maintain 75 psi to maintain it staying a liquid. And then PRV at slightly higher.

This is all conjecture.

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159

No, that looks right looking at the triple point graph. But wouldnā€™t cooling power be correlated to how much pressure can be blown off?

Wouldnā€™t it make sense to set the prv as high as possible to increase the rate the gas is evacuated?

Probably gonna be loud af coming out of a prv too.

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160

Again, all conjecture so take what Iā€™m saying with a grain of salt.

If you have a regulator which needs to be set to above 75 psiā€¦ if the PRV is set to letā€™s say 125psi, how does the feed rate push more in the prv is 125. This is where I get lost

You tell me scoobie

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