I recently read a book by a guy who stayed alive in a life raft for 76 days drifting across the Atlantic. He had two of these as his main source of fresh water.
@@user9b2 Because you would use way more energy to transport the water and distilled water is more readily infected with bacteria due to less competitive inhibition. Also filters last a long time as they are one of the final steps in treatment.
Since I taught this in the military I can assure you the instructions say to have it set up before sunrise and DON'T play with it until after sunset. If you play around with it the action slows down the production. Just Leave It T.F. Alone until after sunset. Great demonstration !!!!!
@@jacobhoffman2553the collection point could but the algae won’t be in the distillation, if the interior walls got grimy I suppose it would be good if you could leave exposed to direct air/sun for a bit
@@jacobhoffman2553 there is a reason why some people should stay in their NY-NY apartment... This is evaporated water within 6 to 8hrs bottom sediment is salt top sediment is dead water, empty from any life, no mineral Bacteria grow/feed on what?
That is a Fitzgerald still. I was fortunate enough to be helping Dr Fitzgerald with another project in the last '60's when he was developing this still design at RAE Farnborough. The principle feature is that conical, pointed top that allows condensed water to flow down the sides for collection, rather than drip from the top surface (of a ball) back to the black salt water collector. The fact that these are still being used points to the genius of the original specs and design. It was taken up by NATO for military survival and then by Aquamate for civilian use. Makes up to 2 litres per day in good sun.
Odd that I can't find a reference to any Dr. Fitzgearld (well, *you're* Dr. Fitzgerald) and any type of solar still... nothing for a Fitzgerald Still either. I can't find anything with the RAE and the name Fitzgerald. Help me out.
@@brianbassett4379 No I am just a retired Ex RAF pilot. I was seconded to Farnborough to specifically help out with some trials with the early Martin Baker ejection seats. Jim Fitgerald was pursuing various experiments to determine the amount of spinal compression that occurred with passive seating and shoulder strap arrangements on these seats. But that is perhaps not specifically interesting. The point was I was / am tall, with a long back and I was available between courses. The military is good at finding pegs for shaped holes. Anyway the point is, my experimental usefulness was usually over by about 10:00 as all my back compression was expended and only a night horizontal could get that back (pun intended). The still was one of the side projects that Jim had running and helped with in the PM. Somewhere I have pictures on me on the flat roof of the main building tending a prototype that looks exactly like the one in the video above. Right down to the black felt base and collection baggie. I don't recall the filler being the same, but it is a long time ago. However I was party to many rather interesting discussions about the utility of the conical top and the side ring collection etc. The prototypes were based, as far as I could tell, on simple children's inflatable rings with the top portion of plastic, cut and glued to form the cone. I did come across a unit in a sea survival course at RAF Mountbatten and it was demonstrated as in use in some large aircraft survival kits. AFAIK it was this one : www.echomax.co.uk/solar-stills. What became of Jim, I have no idea. He was in mid 40's (guess) when I met him, so as I was 18/19 then and am 73 now - you do the math. Hope this helps.
@@crapisnice😂 Sure, that sounds incredibly easy to pack up as an emergency lifesaving device. 🙄 Nothing like having to worry about your life-saving emergency water source's wood/glass/ceramic pieces accidentally getting broken while you're waiting for help to arrive... The one in this video is obviously designed to be used in case of emergency, not as a replacement for a regular fresh water source. It makes sense for this to be made out of thin inflatable polymer in order for it to be stowed away somewhere (anywhere) until needed.
I learned this method as a science project in middle school. We put dye in water and used a burner to imitate evaporation and then put saran wrap on a slant above it to catch the evaporating water. It collected on the top and when the droplets got big enough they rolled down into a separate dish as clean fresh water. Im currently 31 and that's the main survival tactic that has stuck with me my entire life lol.
Ben Affleck and his crew taught me how to do this in middle school science in 1991 on "The Voyage of the Mimi", on the episode where the ship gets stranded on an uninhabited island and has no clean water to drink.
if you put a zip lock bag or bigger over the branches of a tree you can collect water that the tree leaves expires and drink that. that is why duct tape and clear plastic bags are, so important in any survival bag.
I’m pretty sure you want it in the water to keep help condense the evaporated water inside. Otherwise it will reach an equilibrium state where the rate of condensation is cancelled by the rate of re-evaporation.
@@tigrehermano What do you mean by "on a sewer"....Do you mean placing the sill on top of a manhole or something? If you mean that you have been drinking distilled sewage then inquiring minds want to know...
Yes... Navy too, from the same time period. I know of an instance where a man tried to use one but the seas were to rough and his condensate was contaminated with salt. His body was later found by fishermen, adrift in a life raft. So the story goes.
This isn´t potable water, since it´s destilled, and health-endangering (you blood-cells will blast, if you drink only that)... You have to mix like 2,7% of salty-sea-water to it (973ml destilled- and 27ml of seawater for 1 lt of potalbe), in order to make potable water...
@@mattterry2599 once I was camping for 8 days and I had bought this neat foldable 3-gallon/15L water tank, thought it would be good to have for all 8 of us. After a mere half an hour in that tank, the water tasted like liquid plastic... Imagine the strongest and worst plastic flavor you can, and double it, that's how bad it was. None of us could drink that water, it was absolutely disgusting, I'm not even sure it would taste better after not drinking for 2-3 days - it wasn't refreshing by any means.
@AlphaChinoz i had a similar issue camping. Its the sun on the water bag in my instance that caused the taste. Kept it in the shade and there was no issue. Also was that your first time using one? Did you rinse it out first?
The on dry land equivalent is a clear plastic bag around a branch of a non toxic bush with a lot of green leaves. Tied tight at top and let hang down to collect water. Needs to be in direct sunlight to work effectively.
@bettersteps….hmmm no taste test, fancy that! Pure distilled water in food grade plastic. If you think about it I bet it tastes like water. If you expected it to taste like fish your education has failed you.
@@Dixler683 It's just meaningless unless we get the feedback on how it worked. I don't know how desalinated it will be. Desalination plants go through a distillation process multiple times before water is ready to drink, so I can't know about this method.
@@tsuchan too bad your basic science class education failed you. When water is boiled or allowed to evaporate only H20 molecules are produced , dissolved solids are left behind. The water produced in this survival unit is pure distilled water. It will be flavorless unless high volatile chemicals are present in the sea water. If you are using this unit and at risk of dehydration/death are you really concerned about the taste? Considering how energy intensive desalination plants are I question your claims of multiple evaporations. They do use filtration and reverse osmosis . Go to your market and purchase a bottle of distilled water and taste it. It will be flavorless and lifeless because it is pure water only. Trace minerals give certain waters a “good” taste.
It's not mentioned but floating it on the water surface is important for proper function. It helps to reduce the heating of the collected condensate (after it has run down), reducing the re-evaporation of the drinkable water. Also, not "messing" with it during the day and very carefully handling it when harvesting the condensate reduces the amount of salt contamination. Which also indicates a weak point of this device: rough water conditions can contaminate your drinkable water. (I think) The type I was shown was the round one so this one might have solved that problem, better safe than dehydration.
I made something similar for a fifth grade science fair back in the 90s. It consisted of a cereal bowl containing salt water dyed green, a large glass saucepan lid suspended above where the condensate water built up, and an oven pan at the bottom that collected the clean water that dripped down. I remember asking the teacher if I could keep the project next to a window with direct sunlight or else it wouldn't work. It was obviously not a new concept as similar contraptions were in a lot of survival books at the time, but I managed to win first place as my project also explained the whole evaporation and condensation process.
You need to add a vacuum hand pump to the unit to create a lower vapour pressure inside the unit, which will lower the temperature boiling point of the water and accelerate evaporation.
Not gonna work in a unit this small, dude. The water surface is too small and it wouldn't weight enough to prevent it from rising up and filling the thingy with water.
You know, I always wondered about this as a kid living in the southeastern United States during the summer. Any piece of plastic would have water on the back of it tarps buckets bottles… It always made me think if you were to end up deserted or in a position to have to get fresh water, it would be a good idea to put your water source in a little tent made of plastic, and it would evaporate and condense. It might still stink like the source, but I never was quite sure if that was enough for it to evaporate and condense that way to drink. I swear I thought of this by myself. It’s so funny that it turns out that’s exactly what you do. I wonder why it is people think commonly like this with materials that we’ve not had but just for a few generations
The way you want that little tent setup for survival is in a hole. Put a collection bottle or clean bowl at the bottom of a small hole you can cover with plastic. Make sure the edges of the hole reach however large your piece of plastic is. Place a single rock or pebble in the center, over the bottle or bowl, and the water will drip all day down into it. After sunset, go retrieve your water.
these are great to have in reserve in case your main water source in compromised. i'd recommend 3 per person plus decent sized water bladders to go with them. if you're down to a solar still there will be overcast days where you don't produce as much. use the bladders for excess. having said that, if you're fixing to do some serious sailing make sure you have multiple ways to produce water.
Wow. This is only the second time I have seen one of these. The first time I saw one was on a science show (Science International, a.k.a. What Will They Think of Next?) back in the late 1970s when I was still a kid. At that time, it was something new that was still under development. I guess it must have worked because the one in this video looks almost identical to the one I saw on that show over four decades ago.
All you goofballs asking how it tastes, it's distilled water. It tastes bad. Which is ehy you have to add a small amount of sea water back to it to get some electrolytes.
What's crazy is at work we open a lot of Life rafts that are put on all kinds of yachts not one of them has ever had a solar still in the light raft with the rest of the supplies you have a life raft whenever you get it packed make sure you add a solar still to it otherwise you won't have one
Maybe there’s a reason for that? Yes it works but only in ideal conditions temp,wind and overcast conditions will all affect how well it works. If I was sailing around tropics I would definitely have one but other than that it’s pretty useless
You need to keep it in the water so that the cooler water helps the moisture to condense. You need to constantly remove moisture from the air in order for more moisture to take its place through evaporation. Condensation speeds up the EVAP rate, etc etc
The moisture in the air in the bag will make contact with the inner bag surface and more gaseous water In The air will meet this water and combine with it until it’s big enough and heavy enough to be a visible droplet and roll down to the fresh water collection bag
When used properly the motion of the waves accelerates the process and the catch bag hanging below facilitates fluid transfer better. I'd bet the instructions say that very thing.
@@VitaliiThe Естественно. Влага сначала испаряется, потом конденсируется. Это и есть дистилляция. Другое дело, на чëм влага конденсируется. Если она выпадает на химически не инертный материал, то она сразу загрязняется.
@@Ivanych_Milovadzeда я вот о том же, чтоб дистилят перегнать целый самогонный аппарат нужен из стали, или стекло какое-то, а тут раз-два и без примесей совсем? Я думал что там хоть что-то остается, хотя если какой-то пищевой пластик который не деградирует при таком нагреве и реакции с соленой водой, может действительно так
@@VitaliiThe Виталий, тут ведь вот какое дело... Нагрев-то очень не большой! Солнце хоть и нагревает этот "пакет", но не до "разложения на плесень и липовый мёд". Так что это устройство вполне безопасное. Кроме того, в условиях выживания, можно позволить себе пить и не совсем чистую воду. Главное, чтобы она не убила вас сама. Что касается самогонных аппаратов (перегонных кубов), они сделаны для активной дистилляции, быстрой и эффективной. Там и нагрев мощный, и принудительное охлаждение пара присутствует. Во всей этой истории главная закавыка в том, что прибор должен быть компактным, дешëвым, и не требовать затрат энергии извне. Еë просто может не быть! Не подойдут всякие нагревательные элементы, кастрюли, и прочие технически сложные и дорогостоящие приспособления. Надо так - бросил "пакет" на солнце, и вот она - пресная вода! Попил - уже жив!
If you leave in water then water will cool and lower the chamber temp thus lowering rate of water being heated from liquid to gaseous phase. Once gaseous it’ll diffuse in the chamber and hit the walls and collect and increase and roll down. More heat generates more liquid to gaseous phase. So ocean water drawing heat out of container slows process down
it's made to function when the dome has lots of slack and wrinkles in it. it will produce about 3x the water than if it is stretched tight. personal experience
I know the heat and evaporation of the salt water is what your looking for but I would think the fresh water collected around the bottom edges you would want some what cool (or at the sea surface temp) to keep it from evaporating back into the still.
It doesn't. The black bottom is black so it is heated more than the top. The top is where the water vapor condenses, not the sides or bottom. Being in the water defeats this. Its only designed to float because its for an emergency life raft where they would be no room in it for a still.
No. You want it as hot as possible in the chamber. The heat is what makes the water evaporate, which is the more necessary part. As long as the air is cooler than the inside, its going to condense. The faster it evaporates, the faster it can collect. You want it to be as hot as physically possible.
@@obsidianjane4413 Yeah. This still is optimized for simplicity and low maintenance rather than efficiency. Any other design would be too complex to fit in such a small package.
You uh. . .you can bathe in salt water. It won't hurt you. You just can't drink it. you don't been fresh water for a bath. Jesus christ. Go read a book.
I like this cone shape I remember someone testing an older sphere design and according to him for it to work you had to air it up just right for best results.
It’s also good for freshwater because a lot of the bacterial and what not contaminant gets left behind since it’s not carried on the water vapor inside the still
Fill the bottom with seawater as it dark and the top is see through the sunlight will heat the bottom water. The warm water will start to evaporate the warmer the bottom the better. The steam goes up and if the cone top is cooler it will codense and fresh water will drip to side ring connected to the drinking bottle. Don't put the device in the water you cool the bottom and stop the evaporation. If anything keep out the water and put it on warm Sunny dark surface to keep the evaporation going. From time to pour cool seawater in the top t cool it and condenses faster. Ever boiled pot of soup? If you cool the bottom it will stop evaporating
Read about these years ago (1980's?) You don't play with them, moving them around etc. You put them in the water and leave them alone until the sun has gone down or the collecting bag is full. They are not supposed to be used singly either.
Excellent concept but...1. Produces like a 16oz bottle after what like 30hrs, including nighttime? And 2. Does salt residue get left behind either up in the clear cone/ dome and or in the tubes? Hopefully the latter as they can be rinsed out
A survivor who had to use those or similar ones said the black surface started to rot after extensive use. I guess make sure yours are made of material that won't rot
I wonder how long the plastic can last in the sunshine. I hope that's been taken care of. Nice design. Could we have something that covers more area and produces more water, other than a bigger still.
The part with the sea water is supposed to be hot, as that leads to evaporation, but the dome itself and especially the drain is supposed to be cold, so the water condenses and stays in liquid form for maximum efficiency of this thing.
Quality control has to be tested on each one since it's a survival product, since if it fails the results could be deadly. Plus you have to use much higher quality food grade plastic since it's going to be exposed to high temps and something a person is going to drink water from it's surface.
It works better if you let it in the water, because the cooling effect will help the condensation of the fresh water. Under the sun, the black mateiral were the salt water pools will be hot enough.
Another way to make one, if you are lucky enough to have a large plastic sheet in your lifeboat, is to gets some clothes, or towels, soak them in sea water, form them into a ring shape, an annulus at the bottom of the boat, place a plastic cup or something to catch the condensate, at the centre of the ring of wet salty clothes, cover with the plastic sheet, with something heavy in the middle of the sheet, over the cup, at the lowest point, a stone or something solid would suffice, and hold the perimeter of the plastic sheet tight. It will only fill up slowly with drinking water, but it could save your life!
Depending on outside temps and activity level, a human needs about 2 liter of water per day. Probably more in an area where a solar still would actually work. Looks like each human would need four of these units to survive.
In the book Adrift-at first his water was frequently contaminated but he got better at it over time. and he had a lot of time on his hands. It saved his life.
Two questions: 1. Will this work on a larger scale? 2. This will remove almost all the minerals, how about micro-organisms? Thank You. Excellent presentation.
1- Larger scale would need a better source of energy, like a solar mirror. This is an emergency water supply only. 2- you do not need to eliminate 100% of the salinity, 0,5% salt concentration is actually healtier in the situation that it is designed to be used. Most of the microorganisms are killed by the sun's UV rays, however you should drink all the water, storing it will let them time to reproduce and make you sick.
Когда я учился в мореходном колледже, то запомнил пропорцию - 1:43. Именно в такой пропорции нужно разбавлять воду, полученную дистилляцией с океанской солёной водой. чтобы получалась в итоге нужная, для питьевой воды, минерализация. Может, кому то пригодится.
Большое спасибо за информацию! Я военный моряк в прошлом, и мне приходилось пить опреснёнку. Это была гадость та ещё! Может, если бы там мы использовали вашу формулу - было бы вкуснее?
@@Serg_M Я не получал такой информации на уроках БЗЖ. У нас это сводилось больше именно к спасению корабля при повреждениях или пожаре. Вообще, нам не давали способов выживания. Так, примитивщина, типа устройства и оснащения спас нагрудника. Тут дуй, тут вырви пробочку, если ночь, а тут у тебя свисток. Кто когда особо заботился о матросах?
Still needs to be floating, so it can work on difference in temperature between the greenhouse top and the cooler water below. That's what makes the evaporating seawater condense and flow down the cone.
keep in mind that he was getting some of his water from the fish, though they were almost definitely not sufficient. in theory you could get all of your fresh water from fish, whose kidneys have desalinated the water for you. but it would be too many fish to eat, so you would have to somehow extract their water and leave their corpses behind.
@@SzymczykProductions why not? I’m not talking about drinking pure sea water. I said a couple drops. Maybe I should be more clear. Like 1 to 2 drops per liter. If you disagree that’s fine, but you gotta say why…
@@AnthonyScottGamesit's because in a few drops of sea water there is still a tremendous amount of bacteria and virus that could potentially make you extremely I'll. Plus if you're in an area with algae bloom, toxins. You're much better off trying to get salt and minerals from consuming fish that you catch.
Distilled water is completely stripped of everything other than hydrogen and oxygen and will not give your body any electrolytes. Sea water is about 3.5% salt while the body sits around 1% this unsafe to drink. By diluting the sea water by five times (four gallons distilled to one of sea) they find the right mix to be perfectly healthy and beneficial. I would probably go less than 4to one though since it’s not just the salt that unhealthy in the sea water but also microorganisms n stuff
А вот это - очень грамотный комментарий. Но есть важный недостаток той конструкции, которая показана в видео! Емкость для солёной воды должна быть вынесена за пределы конденсатора! Эта ёмкость должна быть чёрная, для большего нагрева. А патрубок для переноса пара должен заходить в охлаждаемый по вашей идее купол! Вот тогда интенсивность испарения и конденсации возрастёт!
I would definitely have more than one of these on a boat, i would have at least two per person on a boat. Always remember this rule, two is one, and one is none. This not only goes for a water source, but everything not just one water source but knives food etc.
This video reminds me of the episode of "Mythbusters" where they are shipwrecked on a deserted island only with duct tape! Jamie Hyneman made a solar still to have fresh water!
What a cool idea! Use it over any still body of water,such as the Boundary Waters ,up in Minnesota, or any lake where one camps and the water isn't moving....and I can see this on stilts for use in small streams and in quieter areas of rivers....I appreciate this idea! Thank you!
US Navy filters water either by evap or reverse osmosis. We weren't allowed to run the water production until we were in somewhat clean water. One should not use this device near land.
Seems useful to have multiple. Not only could they rupture, and extras are needed. But you might need higher yields for multiple people. I feel like having 2-4 per person on your boat is necessary. It's for survival so it's all last resort, but even still you don't want your lifeline to be so thin.
the old slow method for a life raft. Make a roll of the boat during the rain and collect water at the bottom of the sail - so you can stock up on water until the next rain
I had the same idea. The cool thing is if you had enough inflatables and gave it a structure of super black body pillars running through it and supporting it you could layer it. Have multiple layers of water being heated by the sun. I think one issue is the refraction the condensate makes. You could fix this with a super white body passive cooling. Basically even in direct sunlight this material is so reflective of light and IR energy it can passively cool. It takes direct contact to transfer heat into it. Have this in a cone at the top and let it build the condensate there. Or in my idea it would be dispersed through the layers in a grid pattern. Then you could float these on any sea or ocean and collect potable water. Though you could probably just drink it i imagine if the system stayed wet for weeks some bacterial growth would form in the distillate tube. Its just water vapor but some dust might get drawn in.
I think I would prefer a rigid structure for more durability. This one becomes unusable as soon as it leaks air. So I would argue this style is too unreliable.
Depending on body size etc, a person needs 2-3 litres of water per pay. Multiply that by the number of people on board, calculate the number units for that, then double for uncooperative weather and/or damage. I'd stick to manual Reverse Osmosis units.
What a great invention! Every life raft should have half a dozen of those included. I think I would investigate the idea of making one twice the size as that would give waay more than twice the fresh water production- can't see why there is a need to have such a tiny one?
Trouble is, surface area increases by a squared factor and the air volume by a cubed factor so there maybe be an optimum size… who knows though… maybe huge is better!
if you make it too large, it will become less efficient. The larger the water droplets get, the more likely they are to fall back into the water that is being desalinated. You'd want to have multiple ones, rather than larger ones.
When stuck out at sea, this would be an issue yes. I assume this system is supposed to help out for a limited amount of time only until rescue; before mineral deficiency becomes a concern which is less of an immediate problem than dehydration?
I think it works better in the ocean rather then your boat because the bag holding water is underneath easier to drain. When on your boat the bag was level water had hard time draining. think I am getting 1 works good
Thank you. I guess this would work just as well on salt water pumped from the ground into a small pond? I wonder how big you could make the still. I also wonder where the salt goes. Is there potential for producing salt as a by-product. I´m off to look this up :)
There are several ways to use condensation to filter water. It's great that this is a product though, but people should look up ways to filter water with what you may have on hand in an emergency.
You don't put it on net or don't put dome inside water, You put it on plain surface, You add more water , if ever you feel water is already evopatertd. You can do tapping for collection of water. Solor dome doesn't work on cooling system at bottom. More it is hot , more water you will get evaporated. Experiment it and reply. Jay Bharat.
I recently read a book by a guy who stayed alive in a life raft for 76 days drifting across the Atlantic. He had two of these as his main source of fresh water.
Actually I saw the documentary, he said they did not come with a manual thus he did not know how to use them.
@@Couplescience Wow, I can't imagine how scary that must have been.
@@DrAhmadNabeel i think i found a flaw in the product's manufacturing process
Why do the maker of water makers do not use this technology - no wasted filters.
@@user9b2 Because you would use way more energy to transport the water and distilled water is more readily infected with bacteria due to less competitive inhibition. Also filters last a long time as they are one of the final steps in treatment.
Since I taught this in the military I can assure you the instructions say to have it set up before sunrise and DON'T play with it until after sunset.
If you play around with it the action slows down the production. Just Leave It T.F. Alone until after sunset. Great demonstration !!!!!
how do you clean it... itll turn into an algea bucket... i feel like thats left out of the video for a reason...
@@jacobhoffman2553yea dude, its for a life raft, not for permanent use
@@jacobhoffman2553the collection point could but the algae won’t be in the distillation, if the interior walls got grimy I suppose it would be good if you could leave exposed to direct air/sun for a bit
@@jacobhoffman2553 there is a reason why some people should stay in their NY-NY apartment...
This is evaporated water within 6 to 8hrs
bottom sediment is salt
top sediment is dead water, empty from any life, no mineral
Bacteria grow/feed on what?
You taught this in the military, ok, but this ain't Nam - it's the Bahamas
That is a Fitzgerald still. I was fortunate enough to be helping Dr Fitzgerald with another project in the last '60's when he was developing this still design at RAE Farnborough. The principle feature is that conical, pointed top that allows condensed water to flow down the sides for collection, rather than drip from the top surface (of a ball) back to the black salt water collector.
The fact that these are still being used points to the genius of the original specs and design. It was taken up by NATO for military survival and then by Aquamate for civilian use. Makes up to 2 litres per day in good sun.
Odd that I can't find a reference to any Dr. Fitzgearld (well, *you're* Dr. Fitzgerald) and any type of solar still... nothing for a Fitzgerald Still either. I can't find anything with the RAE and the name Fitzgerald. Help me out.
@@brianbassett4379 No I am just a retired Ex RAF pilot. I was seconded to Farnborough to specifically help out with some trials with the early Martin Baker ejection seats. Jim Fitgerald was pursuing various experiments to determine the amount of spinal compression that occurred with passive seating and shoulder strap arrangements on these seats.
But that is perhaps not specifically interesting. The point was I was / am tall, with a long back and I was available between courses. The military is good at finding pegs for shaped holes. Anyway the point is, my experimental usefulness was usually over by about 10:00 as all my back compression was expended and only a night horizontal could get that back (pun intended).
The still was one of the side projects that Jim had running and helped with in the PM. Somewhere I have pictures on me on the flat roof of the main building tending a prototype that looks exactly like the one in the video above. Right down to the black felt base and collection baggie. I don't recall the filler being the same, but it is a long time ago. However I was party to many rather interesting discussions about the utility of the conical top and the side ring collection etc.
The prototypes were based, as far as I could tell, on simple children's inflatable rings with the top portion of plastic, cut and glued to form the cone.
I did come across a unit in a sea survival course at RAF Mountbatten and it was demonstrated as in use in some large aircraft survival kits. AFAIK it was this one :
www.echomax.co.uk/solar-stills.
What became of Jim, I have no idea. He was in mid 40's (guess) when I met him, so as I was 18/19 then and am 73 now - you do the math.
Hope this helps.
@@terciops awesome thanks for telling that!
its a source of nanoplastics, it can be built wih thin glass and wood,plant fiber or ceramic
@@crapisnice😂 Sure, that sounds incredibly easy to pack up as an emergency lifesaving device. 🙄 Nothing like having to worry about your life-saving emergency water source's wood/glass/ceramic pieces accidentally getting broken while you're waiting for help to arrive... The one in this video is obviously designed to be used in case of emergency, not as a replacement for a regular fresh water source. It makes sense for this to be made out of thin inflatable polymer in order for it to be stowed away somewhere (anywhere) until needed.
I learned this method as a science project in middle school. We put dye in water and used a burner to imitate evaporation and then put saran wrap on a slant above it to catch the evaporating water. It collected on the top and when the droplets got big enough they rolled down into a separate dish as clean fresh water. Im currently 31 and that's the main survival tactic that has stuck with me my entire life lol.
Ben Affleck and his crew taught me how to do this in middle school science in 1991 on "The Voyage of the Mimi", on the episode where the ship gets stranded on an uninhabited island and has no clean water to drink.
@@rstidmancame here to say this. Tho I’d forgotten Ben was in that
if you put a zip lock bag or bigger over the branches of a tree you can collect water that the tree leaves expires and drink that. that is why duct tape and clear plastic bags are, so important in any survival bag.
If Kevin Kostner had 20 of these in Water World he would have lived like a king.
in water-world I thought that's how they would have gotten the "pure stuff"
...In a Bad film!!
Why would he need 20 if he had guils? He had his own contraption for purifying his own urine as well.
@@VonJay Trade sir, where other people pay you for a commodity you have. Old school capitalism lol
I’m pretty sure you want it in the water to keep help condense the evaporated water inside. Otherwise it will reach an equilibrium state where the rate of condensation is cancelled by the rate of re-evaporation.
the great news is you can even use it on a sewer
Agreed. The cooler temperature, is critical and KEY to its' intended purpose. The physics, behind this.
@Heyok-vx7yf it does work, i've been doing it a few times
@@tigrehermano What do you mean by "on a sewer"....Do you mean placing the sill on top of a manhole or something? If you mean that you have been drinking distilled sewage then inquiring minds want to know...
@@GuessWhoAsks you may feel sick (nausea and diarrhea) for a few weeks but it's just the placebo effect of you thinking it came from there
These have been around for about 35 years . Good product .
35 years +. I was taught to use these 1977 Merchant navy lifeboat instructions
Yes... Navy too, from the same time period.
I know of an instance where a man tried to use one but the seas were to rough and his condensate was contaminated with salt. His body was later found by fishermen, adrift in a life raft. So the story goes.
Much longer. Some models date back to WWII.
You went through all of the work to make this video but don’t actually drink any to confirm to viewers that it tastes ok?!?
This isn´t potable water, since it´s destilled, and health-endangering (you blood-cells will blast, if you drink only that)... You have to mix like 2,7% of salty-sea-water to it (973ml destilled- and 27ml of seawater for 1 lt of potalbe), in order to make potable water...
It'll probably taste like hose water but If you're ever in a situation that requires this I'm sure it'll taste like nectar.
@@mattterry2599 once I was camping for 8 days and I had bought this neat foldable 3-gallon/15L water tank, thought it would be good to have for all 8 of us. After a mere half an hour in that tank, the water tasted like liquid plastic... Imagine the strongest and worst plastic flavor you can, and double it, that's how bad it was. None of us could drink that water, it was absolutely disgusting, I'm not even sure it would taste better after not drinking for 2-3 days - it wasn't refreshing by any means.
id imagine it tastes of warm plastic... but at least no salt.
@AlphaChinoz i had a similar issue camping. Its the sun on the water bag in my instance that caused the taste. Kept it in the shade and there was no issue. Also was that your first time using one? Did you rinse it out first?
The on dry land equivalent is a clear plastic bag around a branch of a non toxic bush with a lot of green leaves. Tied tight at top and let hang down to collect water. Needs to be in direct sunlight to work effectively.
there's less seawater on land
No taste test?
@bettersteps….hmmm no taste test, fancy that! Pure distilled water in food grade plastic. If you think about it I bet it tastes like water. If you expected it to taste like fish your education has failed you.
@@Dixler683 wow you're salty, pun intended 😂
It would be nice to hear what it tastes like.
@@Dixler683 It's just meaningless unless we get the feedback on how it worked. I don't know how desalinated it will be. Desalination plants go through a distillation process multiple times before water is ready to drink, so I can't know about this method.
@@tsuchan too bad your basic science class education failed you. When water is boiled or allowed to evaporate only H20 molecules are produced , dissolved solids are left behind. The water produced in this survival unit is pure distilled water. It will be flavorless unless high volatile chemicals are present in the sea water. If you are using this unit and at risk of dehydration/death are you really concerned about the taste? Considering how energy intensive desalination plants are I question your claims of multiple evaporations. They do use filtration and reverse osmosis . Go to your market and purchase a bottle of distilled water and taste it. It will be flavorless and lifeless because it is pure water only. Trace minerals give certain waters a “good” taste.
Every liferaft should have that as the top of the roof.
And a rainwater collector.
Like the tent they use in Dune :) A still tent.
It's not mentioned but floating it on the water surface is important for proper function. It helps to reduce the heating of the collected condensate (after it has run down), reducing the re-evaporation of the drinkable water.
Also, not "messing" with it during the day and very carefully handling it when harvesting the condensate reduces the amount of salt contamination. Which also indicates a weak point of this device: rough water conditions can contaminate your drinkable water. (I think) The type I was shown was the round one so this one might have solved that problem, better safe than dehydration.
Great ideas here
I made something similar for a fifth grade science fair back in the 90s. It consisted of a cereal bowl containing salt water dyed green, a large glass saucepan lid suspended above where the condensate water built up, and an oven pan at the bottom that collected the clean water that dripped down. I remember asking the teacher if I could keep the project next to a window with direct sunlight or else it wouldn't work.
It was obviously not a new concept as similar contraptions were in a lot of survival books at the time, but I managed to win first place as my project also explained the whole evaporation and condensation process.
I didn't know they worked this well. Absolutely something to put in a grab bag.
This well? 🤣
@@Ulexcool I didn't think they worked at all to be honest, but you actually get some water.
@@Thelavendel little bit of cloud, wont work. little bit of wind, wont work
You need to add a vacuum hand pump to the unit to create a lower vapour pressure inside the unit, which will lower the temperature boiling point of the water and accelerate evaporation.
Not gonna work in a unit this small, dude.
The water surface is too small and it wouldn't weight enough to prevent it from rising up and filling the thingy with water.
If you are using a handpump, better add a small RO filter and directly pump out drinking water.
It's inflatable. If you turned it into a vacuum it would collapse from the outside air pressure.
You know, I always wondered about this as a kid living in the southeastern United States during the summer. Any piece of plastic would have water on the back of it tarps buckets bottles…
It always made me think if you were to end up deserted or in a position to have to get fresh water, it would be a good idea to put your water source in a little tent made of plastic, and it would evaporate and condense. It might still stink like the source, but I never was quite sure if that was enough for it to evaporate and condense that way to drink. I swear I thought of this by myself. It’s so funny that it turns out that’s exactly what you do. I wonder why it is people think commonly like this with materials that we’ve not had but just for a few generations
The way you want that little tent setup for survival is in a hole. Put a collection bottle or clean bowl at the bottom of a small hole you can cover with plastic. Make sure the edges of the hole reach however large your piece of plastic is. Place a single rock or pebble in the center, over the bottle or bowl, and the water will drip all day down into it. After sunset, go retrieve your water.
these are great to have in reserve in case your main water source in compromised. i'd recommend 3 per person plus decent sized water bladders to go with them. if you're down to a solar still there will be overcast days where you don't produce as much. use the bladders for excess.
having said that, if you're fixing to do some serious sailing make sure you have multiple ways to produce water.
Wow. This is only the second time I have seen one of these. The first time I saw one was on a science show (Science International, a.k.a. What Will They Think of Next?) back in the late 1970s when I was still a kid. At that time, it was something new that was still under development. I guess it must have worked because the one in this video looks almost identical to the one I saw on that show over four decades ago.
All you goofballs asking how it tastes, it's distilled water. It tastes bad. Which is ehy you have to add a small amount of sea water back to it to get some electrolytes.
The main concern is probably contaminents
What's crazy is at work we open a lot of Life rafts that are put on all kinds of yachts not one of them has ever had a solar still in the light raft with the rest of the supplies you have a life raft whenever you get it packed make sure you add a solar still to it otherwise you won't have one
Maybe there’s a reason for that? Yes it works but only in ideal conditions temp,wind and overcast conditions will all affect how well it works. If I was sailing around tropics I would definitely have one but other than that it’s pretty useless
You need to keep it in the water so that the cooler water helps the moisture to condense. You need to constantly remove moisture from the air in order for more moisture to take its place through evaporation.
Condensation speeds up the EVAP rate, etc etc
That is totally wrong.
yer over thinking it
The moisture in the air in the bag will make contact with the inner bag surface and more gaseous water In The air will meet this water and combine with it until it’s big enough and heavy enough to be a visible droplet and roll down to the fresh water collection bag
The catchment groove along the sides of the inflatable ring needs to be diagonally slanted down to the collection point and outlet tube.
“It’s basically almost nothing, but it’s something.” 👍👍👍👍😀
😃🙌🍻
well yes , but actually No
an emergency changes your perceptions real fast
Considering it's distilled, I'd say it's a bit too much... Can't imagine drinking it like that without bringing some supplements including table salt.
more like "it's basically nothink, but it's somethink"
When used properly the motion of the waves accelerates the process and the catch bag hanging below facilitates fluid transfer better. I'd bet the instructions say that very thing.
You should taste the water and let us know how it tastes. Thanks for the video!
Вы можете удивиться, но у дистиллированной воды совершенно нет вкуса! Если только этот пластик не выделяет чего-то неприятного.
@@Ivanych_Milovadzeа таким образом там дистилят получится?
@@VitaliiThe Естественно.
Влага сначала испаряется, потом конденсируется. Это и есть дистилляция.
Другое дело, на чëм влага конденсируется.
Если она выпадает на химически не инертный материал, то она сразу загрязняется.
@@Ivanych_Milovadzeда я вот о том же, чтоб дистилят перегнать целый самогонный аппарат нужен из стали, или стекло какое-то, а тут раз-два и без примесей совсем? Я думал что там хоть что-то остается, хотя если какой-то пищевой пластик который не деградирует при таком нагреве и реакции с соленой водой, может действительно так
@@VitaliiThe Виталий, тут ведь вот какое дело...
Нагрев-то очень не большой!
Солнце хоть и нагревает этот "пакет", но не до "разложения на плесень и липовый мёд".
Так что это устройство вполне безопасное.
Кроме того, в условиях выживания, можно позволить себе пить и не совсем чистую воду. Главное, чтобы она не убила вас сама.
Что касается самогонных аппаратов (перегонных кубов), они сделаны для активной дистилляции, быстрой и эффективной.
Там и нагрев мощный, и принудительное охлаждение пара присутствует.
Во всей этой истории главная закавыка в том, что прибор должен быть компактным, дешëвым, и не требовать затрат энергии извне.
Еë просто может не быть!
Не подойдут всякие нагревательные элементы, кастрюли, и прочие технически сложные и дорогостоящие приспособления.
Надо так - бросил "пакет" на солнце, и вот она - пресная вода!
Попил - уже жив!
Why didn't you drink the water?
they put something in it to make you forget.
@@StopThisIsBatCountry abount your life choices, and why you still hold a grudge against Mike.
@@Livinghighandwise it was a reference to half life 2 ;)
Videos are easy to edit. People would have said he faked it. I'm sure the water's safe, just tastes like plastic.
Because its not vodka...😂
If you leave in water then water will cool and lower the chamber temp thus lowering rate of water being heated from liquid to gaseous phase. Once gaseous it’ll diffuse in the chamber and hit the walls and collect and increase and roll down. More heat generates more liquid to gaseous phase. So ocean water drawing heat out of container slows process down
it's made to function when the dome has lots of slack and wrinkles in it. it will produce about 3x the water than if it is stretched tight. personal experience
So maybe it would benefit from some vertical ribs inside to encourage the water to flow down ....
personal experience was in glassy-flat water, or shakin' ripples?
I know the heat and evaporation of the salt water is what your looking for but I would think the fresh water collected around the bottom edges you would want some what cool (or at the sea surface temp) to keep it from evaporating back into the still.
Simple idea, simple gadget, excellent outcome
Thanks!
Thanks 🙏 🙏🙏
I think it works better in the sea so the cooler ocean water helps collect the condensate.
It doesn't. The black bottom is black so it is heated more than the top. The top is where the water vapor condenses, not the sides or bottom. Being in the water defeats this. Its only designed to float because its for an emergency life raft where they would be no room in it for a still.
No. You want it as hot as possible in the chamber. The heat is what makes the water evaporate, which is the more necessary part. As long as the air is cooler than the inside, its going to condense. The faster it evaporates, the faster it can collect. You want it to be as hot as physically possible.
@@obsidianjane4413 Yeah. This still is optimized for simplicity and low maintenance rather than efficiency. Any other design would be too complex to fit in such a small package.
I need a couple dozen of these. I would like to take a bath everyday if I was lost at sea.
They sell them surplus.
Don't forget the ice maker
You uh. . .you can bathe in salt water. It won't hurt you. You just can't drink it. you don't been fresh water for a bath. Jesus christ. Go read a book.
I like this cone shape I remember someone testing an older sphere design and according to him for it to work you had to air it up just right for best results.
What a clever idea. It's ideal since it doesn't take up much room in a grab bag and if you have to abandon ship you've got fresh water.
I designed one of these in 2002 as part of my undergrad engineering degree.
It's damn near identical to this.
You weren't failed for copying a decades old design?
Yea seriously these have been around since AT LEAST the early 70s. I know because I had to use one a few times in survival training back then.
It’s also good for freshwater because a lot of the bacterial and what not contaminant gets left behind since it’s not carried on the water vapor inside the still
Great invention. The interior surface of the dome requires innovation to increase rivulet formation.
Fill the bottom with seawater as it dark and the top is see through the sunlight will heat the bottom water. The warm water will start to evaporate the warmer the bottom the better. The steam goes up and if the cone top is cooler it will codense and fresh water will drip to side ring connected to the drinking bottle. Don't put the device in the water you cool the bottom and stop the evaporation. If anything keep out the water and put it on warm Sunny dark surface to keep the evaporation going. From time to pour cool seawater in the top t cool it and condenses faster. Ever boiled pot of soup? If you cool the bottom it will stop evaporating
It should work better while in the water correct? I believe the general concept requires hot moist air and a cool surface to condensate on
Probably on land as it heats up more. Being in water is cooling down the water you want to heat up.
Read about these years ago (1980's?) You don't play with them, moving them around etc. You put them in the water and leave them alone until the sun has gone down or the collecting bag is full. They are not supposed to be used singly either.
Excellent concept but...1. Produces like a 16oz bottle after what like 30hrs, including nighttime? And 2. Does salt residue get left behind either up in the clear cone/ dome and or in the tubes? Hopefully the latter as they can be rinsed out
A survivor who had to use those or similar ones said the black surface started to rot after extensive use. I guess make sure yours are made of material that won't rot
I wonder how long the plastic can last in the sunshine. I hope that's been taken care of.
Nice design. Could we have something that covers more area and produces more water, other than a bigger still.
The part with the sea water is supposed to be hot, as that leads to evaporation, but the dome itself and especially the drain is supposed to be cold, so the water condenses and stays in liquid form for maximum efficiency of this thing.
These things are incredibly expensive considering the manufacturing is not much different than making an inflatable beach toy.
The irony is that in capitalism, no lives matter
Spoken like a person who has never had to rely on their equipment for survival.
If people think they need them. They can raise the price and get away with it
Offer and demand?
Quality control has to be tested on each one since it's a survival product, since if it fails the results could be deadly. Plus you have to use much higher quality food grade plastic since it's going to be exposed to high temps and something a person is going to drink water from it's surface.
I bet this would have saved lots of lives over the years if people had this or something similar
The Solar still is old. The Navy had it on life rafts before 1958, that I know of. I was SUB Duty.
It works better if you let it in the water, because the cooling effect will help the condensation of the fresh water.
Under the sun, the black mateiral were the salt water pools will be hot enough.
This is a floating variant of a camping trick with clear plastic, a small rock and a bucket.
Another way to make one, if you are lucky enough to have a large plastic sheet in your lifeboat, is to gets some clothes, or towels, soak them in sea water, form them into a ring shape, an annulus at the bottom of the boat, place a plastic cup or something to catch the condensate, at the centre of the ring of wet salty clothes, cover with the plastic sheet, with something heavy in the middle of the sheet, over the cup, at the lowest point, a stone or something solid would suffice, and hold the perimeter of the plastic sheet tight. It will only fill up slowly with drinking water, but it could save your life!
Looks like potential life saver. Great gadget!
I love it and it works!
It is
How do you know? He never tasted or used the water and it could be contaminated due to faulty design. Worst review ever, lol
@@Obliticus I think the review was just to show it works
@@cjadventures8840 And we really still don't know if it does after watching this, do we?
Its also an easy way to get your daily allowance of PET leached chemicals . It’s only worth while for emergency use.
Depending on outside temps and activity level, a human needs about 2 liter of water per day. Probably more in an area where a solar still would actually work. Looks like each human would need four of these units to survive.
In the book Adrift-at first his water was frequently contaminated but he got better at it over time. and he had a lot of time on his hands. It saved his life.
Two questions:
1. Will this work on a larger scale?
2. This will remove almost all the minerals, how about micro-organisms?
Thank You. Excellent presentation.
1- Larger scale would need a better source of energy, like a solar mirror. This is an emergency water supply only.
2- you do not need to eliminate 100% of the salinity, 0,5% salt concentration is actually healtier in the situation that it is designed to be used. Most of the microorganisms are killed by the sun's UV rays, however you should drink all the water, storing it will let them time to reproduce and make you sick.
It will remove the minerals and kill most the microbes, given your water source isn't too bad.
I have no idea how they put the minerals back.
Don't forget UV spectrum of the light. It's one of the best possibilities to make drinking water safe.
How long before the "Salt" remaining after the condensation becomes a problem?
As the sea water evapourates it leaves a layer of salt, so there must be a way of flushing the device out, and replenishing with clean new salt water!
Когда я учился в мореходном колледже, то запомнил пропорцию - 1:43.
Именно в такой пропорции нужно разбавлять воду, полученную дистилляцией с океанской солёной водой. чтобы получалась в итоге нужная, для питьевой воды, минерализация.
Может, кому то пригодится.
Большое спасибо за информацию! Я военный моряк в прошлом, и мне приходилось пить опреснёнку. Это была гадость та ещё! Может, если бы там мы использовали вашу формулу - было бы вкуснее?
@@Ivanych_Milovadze нам на бзжк это рассказывали. Ещё и в экзаменационных вопросах это было.
@@Serg_M Я не получал такой информации на уроках БЗЖ. У нас это сводилось больше именно к спасению корабля при повреждениях или пожаре.
Вообще, нам не давали способов выживания. Так, примитивщина, типа устройства и оснащения спас нагрудника.
Тут дуй, тут вырви пробочку, если ночь, а тут у тебя свисток.
Кто когда особо заботился о матросах?
The bounce from the ocean will shake it down faster as well. It's really neat, just fragile.
Exactly 👍 If no waves you have to shake it. Feels pretty durable.
Still needs to be floating, so it can work on difference in temperature between the greenhouse top and the cooler water below. That's what makes the evaporating seawater condense and flow down the cone.
I saw a TH-cam documentary of a guy that was stranded in a life raft for a few months. He survived by using 2 of these and eating raw fish.
keep in mind that he was getting some of his water from the fish, though they were almost definitely not sufficient. in theory you could get all of your fresh water from fish, whose kidneys have desalinated the water for you. but it would be too many fish to eat, so you would have to somehow extract their water and leave their corpses behind.
Interesting device. I wonder if it would work better if it had a slightly silvered inside. Can it be cleaned?
Clever bit of equipment. Thank you for showing us. Could be adapted for desert survival.
Yup all that water in the desert.....
@@SOLDOZER
Well, camel urine. Ahem.
Are you distilling your own fluids?🤣😂🌝
I recently heard that if you’re using this to survive, you need to put a couple drops of sea water back in to replace minerals.
DO NOT EVER DRINK SEA WATER!!!! DO NOT LISTEN TO THIS ☝️☝️☝️
@@SzymczykProductions why not? I’m not talking about drinking pure sea water. I said a couple drops. Maybe I should be more clear. Like 1 to 2 drops per liter. If you disagree that’s fine, but you gotta say why…
@@AnthonyScottGamesit's because in a few drops of sea water there is still a tremendous amount of bacteria and virus that could potentially make you extremely I'll. Plus if you're in an area with algae bloom, toxins.
You're much better off trying to get salt and minerals from consuming fish that you catch.
Distilled water is completely stripped of everything other than hydrogen and oxygen and will not give your body any electrolytes.
Sea water is about 3.5% salt while the body sits around 1% this unsafe to drink.
By diluting the sea water by five times (four gallons distilled to one of sea) they find the right mix to be perfectly healthy and beneficial.
I would probably go less than 4to one though since it’s not just the salt that unhealthy in the sea water but also microorganisms n stuff
@@AnthonyScottGames'szymczyk' is pointing to his own sentence warning us, "DO NOT LISTEN".
First time I’ve seen this, thanks Igor!
🙌👍
If you put a small solar cell, and a pump you can pump the cold water over the top to get much more condensation
А вот это - очень грамотный комментарий.
Но есть важный недостаток той конструкции, которая показана в видео! Емкость для солёной воды должна быть вынесена за пределы конденсатора! Эта ёмкость должна быть чёрная, для большего нагрева. А патрубок для переноса пара должен заходить в охлаждаемый по вашей идее купол!
Вот тогда интенсивность испарения и конденсации возрастёт!
how is the taste of this water? i watched it all to know what is the taste and you didnt even tried to drink...
It’s basically like normal water not salty because it has been evaporated before
I would definitely have more than one of these on a boat, i would have at least two per person on a boat. Always remember this rule, two is one, and one is none. This not only goes for a water source, but everything not just one water source but knives food etc.
I can visualize several improvements which will enhance production and also enhance collection.... nice concept though.
Would have liked to see you drink the water and tell us how it was.
This video reminds me of the episode of "Mythbusters" where they are shipwrecked on a deserted island only with duct tape! Jamie Hyneman made a solar still to have fresh water!
I wonder how you keep in clean with all the minerals and salt? I am honestly curious!
What a cool idea! Use it over any still body of water,such as the Boundary Waters ,up in Minnesota, or any lake where one camps and the water isn't moving....and I can see this on stilts for use in small streams and in quieter areas of rivers....I appreciate this idea! Thank you!
US Navy filters water either by evap or reverse osmosis. We weren't allowed to run the water production until we were in somewhat clean water. One should not use this device near land.
does bacteria evaporate with the water?
Seems useful to have multiple. Not only could they rupture, and extras are needed. But you might need higher yields for multiple people. I feel like having 2-4 per person on your boat is necessary. It's for survival so it's all last resort, but even still you don't want your lifeline to be so thin.
the old slow method for a life raft. Make a roll of the boat during the rain and collect water at the bottom of the sail - so you can stock up on water until the next rain
"It's hotter cuz the water is cooling down the whole system"... solid
What do you do with all the salt that get’s collected in there?
I had the same idea. The cool thing is if you had enough inflatables and gave it a structure of super black body pillars running through it and supporting it you could layer it. Have multiple layers of water being heated by the sun. I think one issue is the refraction the condensate makes. You could fix this with a super white body passive cooling. Basically even in direct sunlight this material is so reflective of light and IR energy it can passively cool. It takes direct contact to transfer heat into it. Have this in a cone at the top and let it build the condensate there. Or in my idea it would be dispersed through the layers in a grid pattern. Then you could float these on any sea or ocean and collect potable water. Though you could probably just drink it i imagine if the system stayed wet for weeks some bacterial growth would form in the distillate tube. Its just water vapor but some dust might get drawn in.
this should be a required part of every sea based survival kit.
I think I would prefer a rigid structure for more durability. This one becomes unusable as soon as it leaks air. So I would argue this style is too unreliable.
@@fgregerfeaxcwfeffecea commenter on here said that this is the light commercial model, and there is a sturdy model that's being used in life rafts.
Duct tape is your friend
did you drink any of the water produced?
Depending on body size etc, a person needs 2-3 litres of water per pay. Multiply that by the number of people on board, calculate the number units for that, then double for uncooperative weather and/or damage. I'd stick to manual Reverse Osmosis units.
you didnt mention how clean that water you produced is thats awesome dude! :)
You want to leave it on the water. It needs heat to evaporate the water, and cool to condense it.
It seems like the water isn't transferring to the drinking bag very efficiently. Still, in a survival situation, this would be a huge resource.
Fish etc are curious about these stills, and can easily puncture them. I read of this from a shipwrecked couple who had a liferaft.
I wish you would do a taste test. Would be interested to know if it still salty at all.
What a great invention! Every life raft should have half a dozen of those included. I think I would investigate the idea of making one twice the size as that would give waay more than twice the fresh water production- can't see why there is a need to have such a tiny one?
Maybe larger walls would make it more liable to damage by strong wind.
Trouble is, surface area increases by a squared factor and the air volume by a cubed factor so there maybe be an optimum size… who knows though… maybe huge is better!
if you make it too large, it will become less efficient. The larger the water droplets get, the more likely they are to fall back into the water that is being desalinated. You'd want to have multiple ones, rather than larger ones.
What model is this? I want to buy one
Aquamate
hmmm, drink distelled water can work only for a time... this device should come with a way to add a small amount of minerals to the distilled water
When stuck out at sea, this would be an issue yes. I assume this system is supposed to help out for a limited amount of time only until rescue; before mineral deficiency becomes a concern which is less of an immediate problem than dehydration?
@@maidsandmuses Ребята, у вас минералов под задницей - целое море! Разведите полученную воду с морской в пропорции 43:1
it has a design flaw in that the steam is supposed to be cooled down by cold water.
I think it works better in the ocean rather then your boat because the bag holding water is underneath easier to drain. When on your boat the bag was level water had hard time draining. think I am getting 1 works good
Thank you. I guess this would work just as well on salt water pumped from the ground into a small pond? I wonder how big you could make the still. I also wonder where the salt goes. Is there potential for producing salt as a by-product. I´m off to look this up :)
It really helps if you spray some salt water on the outside every now and then. Keep the drop collector cool. Inside is scorching.
Or just keep it in the water as intended.
@@templeofdelusion inside should* be scorching so the humidity is high. That transparent cone however must be cool in order to condense better.
That should be on every boat emergency kit, seriously.
There are several ways to use condensation to filter water. It's great that this is a product though, but people should look up ways to filter water with what you may have on hand in an emergency.
There is also a filter straw which might be a cheaper option. REI sells them.
You don't put it on net or don't put dome inside water, You put it on plain surface, You add more water , if ever you feel water is already evopatertd.
You can do tapping for collection of water.
Solor dome doesn't work on cooling system at bottom.
More it is hot , more water you will get evaporated.
Experiment it and reply. Jay Bharat.
This still was invented just before or during WWII and used by the NAVY in life boats.
what happens to the residue, does it form salt crystals?
I came up with an idea like that about thirty years ago. I was working a pay-check to pay-check job and did not have the money to develop it.
rly
It need to be in the water, the cooling effect assists condensation