Re: [Vo]:Dry Ice
Cool! Harry On Fri, Jan 21, 2022 at 4:21 PM MSF wrote: > > How to make dry ice with a fire extinguisher: > > https://www.youtube.com/watch?v=tLNHDxd6nDc > > How to make dry ice with a paintball tank: > > https://www.youtube.com/watch?v=L7U2CbxfMMk > > ‐‐‐ Original Message ‐‐‐ > > On Friday, January 21st, 2022 at 8:08 PM, MSF > wrote: > > > It seems as if you are going to do some serious experimenting, and would > > have to make that 5 hour trek more often than you would like. You could > > save yourself a lot of time and gasoline if you just made your own dry ice. > > It's pretty simple. You can buy the whole setup. It's basically a canvas > > bag connected to a CO2 cylinder. You can rent the gas cylinder from a > > welding supply house. Obviously, that's more expensive than buying some dry > > ice, but probably cheaper than making that trip frequently. > > > > ‐‐‐ Original Message ‐‐‐ > > > > On Friday, January 21st, 2022 at 6:15 PM, H LV hveeder...@gmail.com wrote: > > > > > Thanks. The same supplier also makes liquid nitrogen, although if I > > > > > > use liquid nitrogen then I would have to buy a special vessel. > > > > > > For a few years now I have been thinking about redoing a key > > > > > > experiment in the development of radiation theory and then following > > > > > > it up with an experimental modification which has never been tried > > > > > > according to my own historical research. The original experiment > > > > > > performed by Pictet in the 1790s involves placing a flask of > > > > > > ice/water/salt at the focus of one parabolic reflector and a > > > > > > thermometer at the focus of another parabolic reflector. The distance > > > > > > between the foci is several feet but the thermometer cools down > > > > > > significantly. Initially Pictet was surprised because he thought > > > > > > nothing would happen, but he later came to explain the effect in terms > > > > > > of what we now call radiative cooling whereby the parabolic reflector > > > > > > near the thermometer prevented the thermometer from being warmed by > > > > > > its surroundings causing it to lose heat to the ice. However, Count > > > > > > Rumford said it was cooled by the action of frigorific or cooling > > > > > > emanations from the ice being focused onto the thermometer. Pictet > > > > > > thought his explanation was closer to the truth but acknowledged that > > > > > > the experimental result could be explained equally well by either > > > > > > explanation. I want to redo the experiment but also perform a new > > > > > > experiment where the two parabolic reflectors are replaced with one > > > > > > elliptical reflector because it should produce a result which more > > > > > > clearly favors one explanation over the other. > > > > > > This is a diagram I made of the original experiment along with my > > > > > > proposed modification: > > > > > > https://drive.google.com/file/d/16HkSc_BvIvIWJCDwr_KwypW1fhuIUzCf/view?usp=sharing > > > > > > In this 1985 paper the authors describe Pictect's original experiment > > > > > > in more detail and the ideas that were in play at the time. They also > > > > > > describe their recreation of the experiment using liquid nitrogen, a > > > > > > brass ball and parabolic reflectors made of mylar and cardboard: > > > > > > http://webspace.pugetsound.edu/facultypages/jcevans/Pictet's > > > experiment.pdf > > > > > > Harry > > > > > > On Thu, Jan 20, 2022 at 4:41 PM MSF foster...@protonmail.com wrote: > > > > > > > When transporting or storing dry ice, styrofoam is your friend. A Dewar > > > > flask would be preferable, but only thermos bottles are commonly > > > > available, and a lot of them are no longer Dewars. A styrofoam cooler > > > > would probably make your dry ice last the 2 1/2 hour trip as long as > > > > it's full. Large pieces are preferable just to reduce the total surface > > > > area. > > > > > > > > Since you would be traveling in a car, you would want to make sure of > > > > good ventilation to prevent carbon dioxide build up. > > > > > > > > Storing in a freezer could help, as long as the dry ice is inside a > > > > styrofoam container. The freezer, although far above the dry ice > > > > temperature would at least slow down the heat loss. > > > > > > > > Some of your fancier ice cream places are using liquid nitrogen to make > > > > instant ice cream, so if that would do the trick for your cooling > > > > purpose, there might be a supply nearer you. > > > > > > > > ‐‐ Original Message ‐‐‐ > > > > > > > > On Thursday, January 20th, 2022 at 3:55 PM, H LV hveeder...@gmail.com > > > > wrote: > > > > > > > > > Does anyone here have experience transporting and storing dry ice? > > > > > > > > > > If you keep it stored in an ordinary freezer how long will ice cube > > > > > > > > > > sized pieces last? > > > > > > > > > > The closest supplier I can find is a 2.5 hour drive away. Will it even > > > > > > > > > > last 2.5 hours
Re: [Vo]:Dry Ice
Harry Another surprising source of cold air would be from the Ranque-Hilsch vortex tube. The problem is that the vortex tube is not very efficient since the hot side flow is usually wasted. It might be possible to combine a parabolic reflector with a vortex tube in series if one needed colder air than otherwise available. HLV wrote: Here is a similar investigation using parabolic and elliptical reflectors and also a simple reflector with flat sides sloping at 45 degrees. With the parabolic reflector they managed to a cool an emitter 20 degrees below ambient temperature at night. The elliptical reflector was almost as good. https://youtu.be/7qZodSfFQCM Harry Jones Beene wrote: Of interest: https://www.researchgate.net/publication/262806145_Blue_Sky_Cooling_for_Parabolic_Trough_Plants
Re: [Vo]:Dry Ice
Here is a similar investigation using parabolic and elliptical reflectors and also a simple reflector with flat sides sloping at 45 degrees. With the parabolic reflector they managed to a cool an emitter 20 degrees below ambient temperature at night. The elliptical reflector was almost as good. https://youtu.be/7qZodSfFQCM Harry On Fri., Jan. 21, 2022, 1:42 p.m. Jones Beene, wrote: > Of interest: > > > https://www.researchgate.net/publication/262806145_Blue_Sky_Cooling_for_Parabolic_Trough_Plants > >
Re: [Vo]:Dry Ice
Sorry please forget that question.. I forgot that my mail from vortex was going into a separate folder. Harry I wrote: > btw, when I reply to a message the vortex list does not return my > reply so I have to check the website > to see if it was received. Is this normal now? > >
Re: [Vo]:Dry Ice
Whoa Jones! If the sky can be considered a cold dome, and if frigorific radiation follows the rules of geometric optics then when an elliptical reflector is pointed at the sky this is similar to placing a cold body at the reflector's near focus F1. The cooling rays that happen to pass through this point will be directed towards the thermometer at the far focus F2. This thermometer should cool roughly half as much as a thermometer placed at F1. If it is substantially less than half then ordinary radiant cooling would be sufficient to account for the difference. This link shows how an elliptical reflector or a hyperbolic reflector could be used. The key thing to remember is that cooling rays are being emitted in all directions from the sky, but the reflectors selectively focus those rays which happen to pass through F1 in the case of the elliptical reflector or would have passed through F1 in the case of the hyperbolic reflector. https://drive.google.com/file/d/1eT1hmvt-QLpdv0ORoLcaFwewI8Qbhpz6/view?usp=sharing The extra elements refer to some of the events, images and ideas that I contemplated concurrently with this topic. ;-) Harry On Fri, Jan 21, 2022 at 1:42 PM Jones Beene wrote: > > Of interest: > > https://www.researchgate.net/publication/262806145_Blue_Sky_Cooling_for_Parabolic_Trough_Plants >
Re: dry ice at Burning Man Re: [Vo]:Dry Ice
On Fri, Jan 21, 2022 at 8:24 PM William Beaty wrote: > > > Buy slab-type, slabs kept in a stack to avoid internal convection. > > Buy an Al mylar "space blanket" and wrap the slab-stack in many layers. > > Best is to store the whole thing in a thick styrofoam box placed inside > a bigger drinks-cooler. > > Doing that, you can make 20lbs last for over a week. > Great! > While driving, blow outside air or keep windows cracked, so you DON'T DIE. > (Usually this isn't a big issue, since when done right, the offgassing > will be low. People only die when they try using paper bags to transport > many cubic feet of pellet-type, in hot desert environment (with car > sealed, with air conditioning on "recirculate," and with air flowing > through the pellets.) > Ok. Good advice. > For Burning Man, I took 30lbs in a DIY chamber made from many layers of > foil-coated 1/2" styrofoam, for walls 6in thick. I was sitting all day > in Center House, handing out chips so people could cool their drinks. > The only problem was with hot wind storms, where my big box was outside > the tent. Tiny tiny air leaks acted like blow-torches, carving little > slots in the surface of my slab-stack. (That's when I started wrapping > the whole thing in reflective mylar.) Jones's link on 'blue sky cooling' gave me another idea. It seems to me the sky could be used as a cold supply instead of placing some sort of cold material at the first focus of the ellipse. I will explain my cartoon reasoning in a follow up post ;-) The sky wouldn't have the same cooling power but it might be enough to reveal the existence of cooling rays. Harry > > On Thu, 20 Jan 2022, H LV wrote: > > > Does anyone here have experience transporting and storing dry ice? > > If you keep it stored in an ordinary freezer how long will ice cube > > sized pieces last? > > The closest supplier I can find is a 2.5 hour drive away. Will it even > > last 2.5 hours if stored in a cooler or thermos bottle? Would larger > > chunks be better? > > Thanks. > > > > Harry > > > > (( ( ( ( ((O)) ) ) ) ))) > William J. BeatySCIENCE HOBBYIST website > billb at amasci com http://amasci.com > EE/programmer/sci-exhibits amateur science, hobby projects, sci fair > Seattle, WA 206-762-3818unusual phenomena, tesla coils, weird sci >
Re: [Vo]:Dry Ice
On Fri, Jan 21, 2022 at 8:30 PM William Beaty wrote: > > On Thu, 20 Jan 2022, H LV wrote: > > > Does anyone here have experience transporting and storing dry ice? > > First, call the seafood section of any local supermarket, and ask if they > sell dry ice. If they don't, they probably know who does (since people > know to call seafood suppliers when searching for dry ice.) Seafood, and > also ice-cream shops. Here locally, the QFC markets all sell it. But > during halloween week, you can only get some if you'd first reserved it > months in advance! > Ok. I noticed that most American Walmarts sell dry ice, but not the WalMarts in Ontario. which is too bad because there is a Walmart that is only 45 mins away. btw, when I reply to a message the vortex list does not return my reply so I have to check the website to see if it was received. Is this normal now? Harry
Re: [Vo]:Dry Ice
On Fri, 21 Jan 2022, MSF wrote: It seems as if you are going to do some serious experimenting, and would have to make that 5 hour trek more often than you would like. You could save yourself a lot of time and gasoline if you just made your own dry ice. If the dry ice is coming from a welding-gas supplier, the same company may have a dry-ice attchment for CO2 tanks. It's basically a needle-valve and a fiberglass bag. (Maybe they'll even rent one?) (( ( ( ( ((O)) ) ) ) ))) William J. BeatySCIENCE HOBBYIST website billb at amasci com http://amasci.com EE/programmer/sci-exhibits amateur science, hobby projects, sci fair Seattle, WA 206-762-3818unusual phenomena, tesla coils, weird sci
Re: [Vo]:Dry Ice
On Thu, 20 Jan 2022, H LV wrote: Does anyone here have experience transporting and storing dry ice? First, call the seafood section of any local supermarket, and ask if they sell dry ice. If they don't, they probably know who does (since people know to call seafood suppliers when searching for dry ice.) Seafood, and also ice-cream shops. Here locally, the QFC markets all sell it. But during halloween week, you can only get some if you'd first reserved it months in advance! If you keep it stored in an ordinary freezer how long will ice cube sized pieces last? The closest supplier I can find is a 2.5 hour drive away. Will it even last 2.5 hours if stored in a cooler or thermos bottle? Would larger chunks be better? Thanks. Harry (( ( ( ( ((O)) ) ) ) ))) William J. BeatySCIENCE HOBBYIST website billb at amasci com http://amasci.com EE/programmer/sci-exhibits amateur science, hobby projects, sci fair Seattle, WA 206-762-3818unusual phenomena, tesla coils, weird sci
dry ice at Burning Man Re: [Vo]:Dry Ice
Buy slab-type, slabs kept in a stack to avoid internal convection. Buy an Al mylar "space blanket" and wrap the slab-stack in many layers. Best is to store the whole thing in a thick styrofoam box placed inside a bigger drinks-cooler. Doing that, you can make 20lbs last for over a week. While driving, blow outside air or keep windows cracked, so you DON'T DIE. (Usually this isn't a big issue, since when done right, the offgassing will be low. People only die when they try using paper bags to transport many cubic feet of pellet-type, in hot desert environment (with car sealed, with air conditioning on "recirculate," and with air flowing through the pellets.) For Burning Man, I took 30lbs in a DIY chamber made from many layers of foil-coated 1/2" styrofoam, for walls 6in thick. I was sitting all day in Center House, handing out chips so people could cool their drinks. The only problem was with hot wind storms, where my big box was outside the tent. Tiny tiny air leaks acted like blow-torches, carving little slots in the surface of my slab-stack. (That's when I started wrapping the whole thing in reflective mylar.) On Thu, 20 Jan 2022, H LV wrote: Does anyone here have experience transporting and storing dry ice? If you keep it stored in an ordinary freezer how long will ice cube sized pieces last? The closest supplier I can find is a 2.5 hour drive away. Will it even last 2.5 hours if stored in a cooler or thermos bottle? Would larger chunks be better? Thanks. Harry (( ( ( ( ((O)) ) ) ) ))) William J. BeatySCIENCE HOBBYIST website billb at amasci com http://amasci.com EE/programmer/sci-exhibits amateur science, hobby projects, sci fair Seattle, WA 206-762-3818unusual phenomena, tesla coils, weird sci
Re: [Vo]:Dry Ice
How to make dry ice with a fire extinguisher: https://www.youtube.com/watch?v=tLNHDxd6nDc How to make dry ice with a paintball tank: https://www.youtube.com/watch?v=L7U2CbxfMMk ‐‐‐ Original Message ‐‐‐ On Friday, January 21st, 2022 at 8:08 PM, MSF wrote: > It seems as if you are going to do some serious experimenting, and would have > to make that 5 hour trek more often than you would like. You could save > yourself a lot of time and gasoline if you just made your own dry ice. It's > pretty simple. You can buy the whole setup. It's basically a canvas bag > connected to a CO2 cylinder. You can rent the gas cylinder from a welding > supply house. Obviously, that's more expensive than buying some dry ice, but > probably cheaper than making that trip frequently. > > ‐‐‐ Original Message ‐‐‐ > > On Friday, January 21st, 2022 at 6:15 PM, H LV hveeder...@gmail.com wrote: > > > Thanks. The same supplier also makes liquid nitrogen, although if I > > > > use liquid nitrogen then I would have to buy a special vessel. > > > > For a few years now I have been thinking about redoing a key > > > > experiment in the development of radiation theory and then following > > > > it up with an experimental modification which has never been tried > > > > according to my own historical research. The original experiment > > > > performed by Pictet in the 1790s involves placing a flask of > > > > ice/water/salt at the focus of one parabolic reflector and a > > > > thermometer at the focus of another parabolic reflector. The distance > > > > between the foci is several feet but the thermometer cools down > > > > significantly. Initially Pictet was surprised because he thought > > > > nothing would happen, but he later came to explain the effect in terms > > > > of what we now call radiative cooling whereby the parabolic reflector > > > > near the thermometer prevented the thermometer from being warmed by > > > > its surroundings causing it to lose heat to the ice. However, Count > > > > Rumford said it was cooled by the action of frigorific or cooling > > > > emanations from the ice being focused onto the thermometer. Pictet > > > > thought his explanation was closer to the truth but acknowledged that > > > > the experimental result could be explained equally well by either > > > > explanation. I want to redo the experiment but also perform a new > > > > experiment where the two parabolic reflectors are replaced with one > > > > elliptical reflector because it should produce a result which more > > > > clearly favors one explanation over the other. > > > > This is a diagram I made of the original experiment along with my > > > > proposed modification: > > > > https://drive.google.com/file/d/16HkSc_BvIvIWJCDwr_KwypW1fhuIUzCf/view?usp=sharing > > > > In this 1985 paper the authors describe Pictect's original experiment > > > > in more detail and the ideas that were in play at the time. They also > > > > describe their recreation of the experiment using liquid nitrogen, a > > > > brass ball and parabolic reflectors made of mylar and cardboard: > > > > http://webspace.pugetsound.edu/facultypages/jcevans/Pictet's experiment.pdf > > > > Harry > > > > On Thu, Jan 20, 2022 at 4:41 PM MSF foster...@protonmail.com wrote: > > > > > When transporting or storing dry ice, styrofoam is your friend. A Dewar > > > flask would be preferable, but only thermos bottles are commonly > > > available, and a lot of them are no longer Dewars. A styrofoam cooler > > > would probably make your dry ice last the 2 1/2 hour trip as long as it's > > > full. Large pieces are preferable just to reduce the total surface area. > > > > > > Since you would be traveling in a car, you would want to make sure of > > > good ventilation to prevent carbon dioxide build up. > > > > > > Storing in a freezer could help, as long as the dry ice is inside a > > > styrofoam container. The freezer, although far above the dry ice > > > temperature would at least slow down the heat loss. > > > > > > Some of your fancier ice cream places are using liquid nitrogen to make > > > instant ice cream, so if that would do the trick for your cooling > > > purpose, there might be a supply nearer you. > > > > > > ‐‐ Original Message ‐‐‐ > > > > > > On Thursday, January 20th, 2022 at 3:55 PM, H LV hveeder...@gmail.com > > > wrote: > > > > > > > Does anyone here have experience transporting and storing dry ice? > > > > > > > > If you keep it stored in an ordinary freezer how long will ice cube > > > > > > > > sized pieces last? > > > > > > > > The closest supplier I can find is a 2.5 hour drive away. Will it even > > > > > > > > last 2.5 hours if stored in a cooler or thermos bottle? Would larger > > > > > > > > chunks be better? > > > > > > > > Thanks. > > > > > > > > Harry
Re: [Vo]:Dry Ice
It seems as if you are going to do some serious experimenting, and would have to make that 5 hour trek more often than you would like. You could save yourself a lot of time and gasoline if you just made your own dry ice. It's pretty simple. You can buy the whole setup. It's basically a canvas bag connected to a CO2 cylinder. You can rent the gas cylinder from a welding supply house. Obviously, that's more expensive than buying some dry ice, but probably cheaper than making that trip frequently. ‐‐‐ Original Message ‐‐‐ On Friday, January 21st, 2022 at 6:15 PM, H LV wrote: > Thanks. The same supplier also makes liquid nitrogen, although if I > > use liquid nitrogen then I would have to buy a special vessel. > > For a few years now I have been thinking about redoing a key > > experiment in the development of radiation theory and then following > > it up with an experimental modification which has never been tried > > according to my own historical research. The original experiment > > performed by Pictet in the 1790s involves placing a flask of > > ice/water/salt at the focus of one parabolic reflector and a > > thermometer at the focus of another parabolic reflector. The distance > > between the foci is several feet but the thermometer cools down > > significantly. Initially Pictet was surprised because he thought > > nothing would happen, but he later came to explain the effect in terms > > of what we now call radiative cooling whereby the parabolic reflector > > near the thermometer prevented the thermometer from being warmed by > > its surroundings causing it to lose heat to the ice. However, Count > > Rumford said it was cooled by the action of frigorific or cooling > > emanations from the ice being focused onto the thermometer. Pictet > > thought his explanation was closer to the truth but acknowledged that > > the experimental result could be explained equally well by either > > explanation. I want to redo the experiment but also perform a new > > experiment where the two parabolic reflectors are replaced with one > > elliptical reflector because it should produce a result which more > > clearly favors one explanation over the other. > > This is a diagram I made of the original experiment along with my > > proposed modification: > > https://drive.google.com/file/d/16HkSc_BvIvIWJCDwr_KwypW1fhuIUzCf/view?usp=sharing > > In this 1985 paper the authors describe Pictect's original experiment > > in more detail and the ideas that were in play at the time. They also > > describe their recreation of the experiment using liquid nitrogen, a > > brass ball and parabolic reflectors made of mylar and cardboard: > > http://webspace.pugetsound.edu/facultypages/jcevans/Pictet's experiment.pdf > > Harry > > On Thu, Jan 20, 2022 at 4:41 PM MSF foster...@protonmail.com wrote: > > > When transporting or storing dry ice, styrofoam is your friend. A Dewar > > flask would be preferable, but only thermos bottles are commonly available, > > and a lot of them are no longer Dewars. A styrofoam cooler would probably > > make your dry ice last the 2 1/2 hour trip as long as it's full. Large > > pieces are preferable just to reduce the total surface area. > > > > Since you would be traveling in a car, you would want to make sure of good > > ventilation to prevent carbon dioxide build up. > > > > Storing in a freezer could help, as long as the dry ice is inside a > > styrofoam container. The freezer, although far above the dry ice > > temperature would at least slow down the heat loss. > > > > Some of your fancier ice cream places are using liquid nitrogen to make > > instant ice cream, so if that would do the trick for your cooling purpose, > > there might be a supply nearer you. > > > > ‐‐ Original Message ‐‐‐ > > > > On Thursday, January 20th, 2022 at 3:55 PM, H LV hveeder...@gmail.com wrote: > > > > > Does anyone here have experience transporting and storing dry ice? > > > > > > If you keep it stored in an ordinary freezer how long will ice cube > > > > > > sized pieces last? > > > > > > The closest supplier I can find is a 2.5 hour drive away. Will it even > > > > > > last 2.5 hours if stored in a cooler or thermos bottle? Would larger > > > > > > chunks be better? > > > > > > Thanks. > > > > > > Harry
Re: [Vo]:Dry Ice
Of interest: https://www.researchgate.net/publication/262806145_Blue_Sky_Cooling_for_Parabolic_Trough_Plants
Re: [Vo]:Dry Ice
Thanks. The same supplier also makes liquid nitrogen, although if I use liquid nitrogen then I would have to buy a special vessel. For a few years now I have been thinking about redoing a key experiment in the development of radiation theory and then following it up with an experimental modification which has never been tried according to my own historical research. The original experiment performed by Pictet in the 1790s involves placing a flask of ice/water/salt at the focus of one parabolic reflector and a thermometer at the focus of another parabolic reflector. The distance between the foci is several feet but the thermometer cools down significantly. Initially Pictet was surprised because he thought nothing would happen, but he later came to explain the effect in terms of what we now call radiative cooling whereby the parabolic reflector near the thermometer prevented the thermometer from being warmed by its surroundings causing it to lose heat to the ice. However, Count Rumford said it was cooled by the action of frigorific or cooling emanations from the ice being focused onto the thermometer. Pictet thought his explanation was closer to the truth but acknowledged that the experimental result could be explained equally well by either explanation. I want to redo the experiment but also perform a new experiment where the two parabolic reflectors are replaced with one elliptical reflector because it should produce a result which more clearly favors one explanation over the other. This is a diagram I made of the original experiment along with my proposed modification: https://drive.google.com/file/d/16HkSc_BvIvIWJCDwr_KwypW1fhuIUzCf/view?usp=sharing In this 1985 paper the authors describe Pictect's original experiment in more detail and the ideas that were in play at the time. They also describe their recreation of the experiment using liquid nitrogen, a brass ball and parabolic reflectors made of mylar and cardboard: http://webspace.pugetsound.edu/facultypages/jcevans/Pictet's%20experiment.pdf Harry On Thu, Jan 20, 2022 at 4:41 PM MSF wrote: > > When transporting or storing dry ice, styrofoam is your friend. A Dewar flask > would be preferable, but only thermos bottles are commonly available, and a > lot of them are no longer Dewars. A styrofoam cooler would probably make your > dry ice last the 2 1/2 hour trip as long as it's full. Large pieces are > preferable just to reduce the total surface area. > > Since you would be traveling in a car, you would want to make sure of good > ventilation to prevent carbon dioxide build up. > > Storing in a freezer could help, as long as the dry ice is inside a styrofoam > container. The freezer, although far above the dry ice temperature would at > least slow down the heat loss. > > Some of your fancier ice cream places are using liquid nitrogen to make > instant ice cream, so if that would do the trick for your cooling purpose, > there might be a supply nearer you. > > ‐‐ Original Message ‐‐‐ > > On Thursday, January 20th, 2022 at 3:55 PM, H LV wrote: > > > Does anyone here have experience transporting and storing dry ice? > > > > If you keep it stored in an ordinary freezer how long will ice cube > > > > sized pieces last? > > > > The closest supplier I can find is a 2.5 hour drive away. Will it even > > > > last 2.5 hours if stored in a cooler or thermos bottle? Would larger > > > > chunks be better? > > > > Thanks. > > > > Harry >
Re: [Vo]:Dry Ice
When transporting or storing dry ice, styrofoam is your friend. A Dewar flask would be preferable, but only thermos bottles are commonly available, and a lot of them are no longer Dewars. A styrofoam cooler would probably make your dry ice last the 2 1/2 hour trip as long as it's full. Large pieces are preferable just to reduce the total surface area. Since you would be traveling in a car, you would want to make sure of good ventilation to prevent carbon dioxide build up. Storing in a freezer could help, as long as the dry ice is inside a styrofoam container. The freezer, although far above the dry ice temperature would at least slow down the heat loss. Some of your fancier ice cream places are using liquid nitrogen to make instant ice cream, so if that would do the trick for your cooling purpose, there might be a supply nearer you. ‐‐ Original Message ‐‐‐ On Thursday, January 20th, 2022 at 3:55 PM, H LV wrote: > Does anyone here have experience transporting and storing dry ice? > > If you keep it stored in an ordinary freezer how long will ice cube > > sized pieces last? > > The closest supplier I can find is a 2.5 hour drive away. Will it even > > last 2.5 hours if stored in a cooler or thermos bottle? Would larger > > chunks be better? > > Thanks. > > Harry
[Vo]:Dry Ice
Does anyone here have experience transporting and storing dry ice? If you keep it stored in an ordinary freezer how long will ice cube sized pieces last? The closest supplier I can find is a 2.5 hour drive away. Will it even last 2.5 hours if stored in a cooler or thermos bottle? Would larger chunks be better? Thanks. Harry
