At least you let people know they may need to schedule an appointment with the dentist, in advance!
My name is joe, and I support the removing of teeth when needed
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i believe my open top shell units are older. when do i get my royalties lol
6inx48in in a 24in shell.
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How much faster will this speed up recovery…and w a 50lb tank could we then remove it from dry ice and still recovering faster or would u leave tank in dry ice still. I guess the idea is if I can get the tank outta dry ice and run faster that’s badass. I’ve heard tales of guys using these but never really seen it till @FicklePickle showed me. I’m very interested it’s bad ass 
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If there is 35 tubes that are 2’ long, that is 70’ of stainless tube!
That much cold surface area will condense a whole lot more solvent
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@StoneD who said you need your tank on dry ice to run passive you just need the incoming gas cold enough and it should still maintain vac . That is old school passive tek couple of coils with dry ice slurry should do you just fine . Vent off the small amount of headspace pressure if necessary or send it to another tank under vac
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Subzero making em too
https://www.instagram.com/tv/Ca0VuQ2F5My/?utm_medium=copy_link
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The only things that will speak up recovery if the basis are already covered are the following:
- More kW of Heating
- More Surface Area of Evaporation
- More kW of Cooling
- More Surface Area of Condensing
In this instance, the open top tube-in-shell is going to offer a better thermal co-efficient than the coil…
Coils are junk, the only reason this industry uses them is cause c02 manufactures made them and sold them. On extremely high pressure systems, they work due to the high max op of a tube but their efficiency is still terrible… Every coil being used on a hydrocarbon or ethanol setup should be tossed in the trash…
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Should tube in shells be used for solvent injection? Instead of coils to reach subzero temps.
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Absolutely…Toss that coil out.
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Can you expand on this?
If the surface area is the same and energy input is the same why is one better than the other?
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I am driving so I cannot do the math right now
However if there’s 20 3/8” tubes that’s .375” times 20 so that’s 7.5” of surface area AT THE BEGINING OF CONDENSING. Linear inches
Shitloads more space to suck in and condense gas at once…
Sorry that may not make much sense
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Great question. Heat Exchanger efficiency is not something I am not going to write a book to explain, its very easily researched. The three biggest parameters of any heat exchanger are Temp, PSI, Flow Rate.
A tube-in-tube will have a higher efficiency of heat-exchange than a coil of equal surface area and applied energy. Residence time, flow rate, turbulent flow, pressure drop, are all factors in what generates the efficiency.
A plate exchanger is the most efficient type of exchanger. Mostly due to a high heat-transfer coefficient and high turbulence on BOTH sides of the exchanger.
A tube-in-shell exchanger comes in second and is the mostly used type of heat exchanger in the world. It benefits from turbulence on one side pending proper baffling in the shell side.
I could nerd out for days on heat exchangers but do me a favor and ditch those coils. The only time a tube-in-tube coil is generally used is when there are solids or heavy particulates in the fluid stream…
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Interesting you say coils are preferred for solids in the stream because getting them clogged with ice is a nightmare
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Well comparing a block forming from frozen condensation/water and solids in a fluid stream is like apples to oranges…
Any exchanger can get plugged or blocked from improper use…
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Did a ton of people copy yours after seeing it?
When we came up with it, we had never seen it. Then a ton of others copied it, all thanks to green machine labs 
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That’s what I was asking does it allow to get it outta the dry ice that’s cool deal…yeah things are changing that’s for sure I bet it saves a ton dry ice
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Haven’t used one but I assume it eats dry ice and shits out co2 gas consistently… more surface area to condense means more shit condensing which means more co2…,but I assume it does use less because it’s not as wasteful
Shit I want to try it out
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If you guys wanted to save on dry ice, use a staggered condenser approach.
Heat Exchanger #1 - To Drop Vapor Temp & Partially Condense
Closed tube-in-shell running on water or a small 5c chiller…
Heat Exchanger #2- To Condense remaining vapor and chill gas to a stable point.
Open top tube-in-shell running DI/Iso…
That is the only way to cut down on dry ice usage,. If flow-rate, temp, pressure remain linear, the amount of DI being used wont change much* regardless of the type of exchanger being used.
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Yep I have a 30 gallon barrel of water with a giant coil in it. It’s almost better than moving room temp water through a tube in shell as the pump heats up the water. Obviously would be better with a chiller but you can’t beat free energy
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Just get your pressure up… condenses at a higher temp… 
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