Slashdot Mirror


XPrize's New Challenge: Turn Air Into Water, Make More Than a Million Dollars (cnet.com)

An anonymous reader shares a CNET report: If you can turn thin air into water, there may be more than $1 million in it for you. XPrize, which creates challenges that pit the brightest minds against one another, is hoping to set off a wave of new innovations in clean water -- and women's safety too. The company announced its Water Abundance XPrize and the Anu & Naveen Jain Women's Safety XPrize on Monday in New Delhi. The first competition will award $1.75 million to any team that can create a device able to produce at least 2,000 liters of water a day from the atmosphere, using completely renewable energy, for at most 2 cents a liter. Teams have up to two years to complete the challenge. India is at the center of the world's water crisis, with access to groundwater depleted in some northern and eastern parts of the country. Water has become so scarce in India that natural arsenic has infiltrated the soil and water in certain regions. While there are systems that can currently extract water from the atmosphere, many of them aren't energy-efficient, or generating enough water. "We know that overuse of groundwater resources are causing the water crisis and it's only getting worse," said Zenia Tata, XPrize's executive director of Global Expansion. The $1 million Women's Safety XPrize calls for an emergency alert system that women can use, even if they don't have access to their phones. The alert would have to be sent automatically and inconspicuously to emergency responders, within 90 seconds, at a cost of $40 or less a year. The device would have to work even in cases where there's no cellphone signal or internet access.

156 comments

  1. Air into water by Anonymous Coward · · Score: 0

    Dehumidifier.

    Where do I claim my prize?

    1. Re:Air into water by Anonymous Coward · · Score: 0, Funny

      Not moisture from air, but actually turning free hydrogen and oxygen in the atmosphere into water.

      Nice try though.

      Combine this with the "graphene" from carbon dioxide process and we can be rich I tell you, rich!

    2. Re:Air into water by tchuladdiass · · Score: 2

      Refrigerant based dehumidifiers produce about 2 liters per kilowatt hour (at least in a somewhat damp basement -- probably less efficient in drier areas). So that would be over 40 megawatts of continuous input needed to get 2000 liters per day. Or, at 10 cents per kilowatt hour, $100 of electricity per day to reach that target. Or about 5 cents per liter -- not too far off from the 2 cents needed, and it can be renewable if powered off wind or solar. But then you need to factor the capitalized cost of the equipment in -- a dehumidifier is about $100.00 or so, with a 5 year write off that works out to be 1/10 penny per liter. Not sure how much the solar panels will cost to run it though.

    3. Re:Air into water by bigpat · · Score: 2

      Or about 5 cents per liter -- not too far off from the 2 cents needed

      Thanks for doing some quick math, but "not far" is not how I would describe the challenge... It is not an order of magnitude (10x) of improvement, but even taking your numbers that still means the new device has to be over twice as efficient in a humid area and probably closer to 4 times as efficient in a much less humid area.

    4. Re:Air into water by Anonymous Coward · · Score: 0

      Solar stills. Many of them.

      They require zero power and can accumulate as much water as you have room for.

    5. Re:Air into water by StevenMaurer · · Score: 3, Insightful

      The problem with "free hydrogen" is that it floats. You start to see it about 70km up, and even then it is extremely rare because it is so light that it can get knocked out of Earth's gravitational well pretty easily by our solar wind.

      So no, just burning "free" hydrogen just floating around in the atmosphere isn't possible. Good thing too, or else the atmosphere on our planet would be pretty much Hindenburg-like, which would make for a very crispy planet every time there was lightning storm.

    6. Re:Air into water by Anonymous Coward · · Score: 0

      I know this isn't the answer to the question posed, and it is an interesting engineering problem, but it is at least an of magnitude cheaper to desalinate salt water and transport it using pipes than to try to pull it out of air. Presumably this is for areas which money can't solve problems because of corruption, crime, or lack of access to capital. But still, fix the corruption problem and this secondary issue (lack of access to clean water) should go away.

      According to wikipedia, desalinated water costs about 0.1 cents/liter. Transportation costs are on the same scale supposedly. Even if you assume renewable energy costs 5X what traditional sources cost to supply both the desalination and pumping electricity, you are at 1 cent/liter.

      Now I just calculated how much I'm overpaying for Lake Michigan water (which should be significantly cheaper than desalinated water). Perhaps I should have said "excessive corruption" above, since nothing gets done without _some_ corruption apparently - I pay about what desalinated water costs, instead of 1/10th of that amount. I think they are charging what the market will bear, not their costs.

    7. Re: Air into water by bleugh · · Score: 1

      Cool. We're all gonna suffocate. At least we won't be thirsty

    8. Re:Air into water by amicusNYCL · · Score: 1

      There's $1.75 million on the line, so instead of posting anonymously to Slashdot you should get to work.

      --
      "Our two-party system is like a bowl of shit looking at itself in a mirror." - Lewis Black
    9. Re:Air into water by thinkwaitfast · · Score: 3, Informative
      I'm running a dehumidifier on solar. I'm getting about 30L/day, but wouldn't drink the water without a lot of filtration. I could theoretically run 4 dehumidifiers with my inverter. I can scale that up by trivially duplicating what I have 6x, so 6x$4k = $24k for the solar. Actually, add 6k in batteries so that it runs at night - $30k in solar + 70 dehumidifiers @$200 each.so $14k.

      $44k + $6k fudge factor. I could easiy do it for less than $50k assuming a semi-humid environment. Or a flooded laundry room.

      Note that's an off the shelf solution, I'd bet tht this could be reduced by 20% with a more targeted design (no inverters in the system and dc motors in the dehumidifiers)..

    10. Re:Air into water by rossdee · · Score: 1

      "but actually turning free hydrogen and oxygen in the atmosphere into water."

      What planet are they from?
      Jupiter? Saturn?

      Or the next planet out after that

      I

    11. Re:Air into water by mattwarden · · Score: 1

      What do you do with all the heat? And wouldn't you need a very large volume of air?

    12. Re:Air into water by ShanghaiBill · · Score: 4, Informative

      TFA gives the example of India running out of ground water. The reason for this is that India provides FREE ELECTRICITY to farmers, giving them no incentive whatsoever to conserve. So they run their pumps 24/7, over watering their fields and depleting aquifers. Ending these idiotic subsidies would do far more good than wasting even more power to condense humidity out of the air.

      It would be better for both farmers, the environment, and the Indian economy to replace power subsidies with unconditional money transfers. Then the farmers could decide for themselves what to spend the money on: possibly electricity, but more likely efficient pumps, drought tolerant seeds, fertilizer, etc. Power and water waste would decline, crop yields would improve, and rural incomes would rise.

    13. Re:Air into water by Ol+Olsoc · · Score: 1

      The reason for this is that India provides FREE ELECTRICITY to farmers, giving them no incentive whatsoever to conserve.

      Just between us Chachalacas, one might think, just possibly, mayb kinda sorta.....

      They have too many fucking people!

      But don't worry, there is no problem at all, because Godwin is always wrong.

      That's the thing, Earth can accomodate an infinity of people. Removing enough Oxygen to make water to hand to a few billion people forever is just about the smartest idea ever.

      But here is the thing. does India or any other country have the right to remove huge amounts of Oxygen from the atmosphere?

      The women's safety prize is a good idea, but India's male attitude toward women is the real problem. In a country where rape is caused by unclothed or scantily clad mannequins inciting lust in males, http://www.telegraph.co.uk/new..., firearms might be a better thing for women to carry.

      --
      The shepherds did so well protecting the flock that the sheep no longer believed that wolves existed.
    14. Re:Air into water by Anonymous Coward · · Score: 0

      Don't even bother with the electricity, just use the solar heat directly to drive an absorption based chiller.

    15. Re:Air into water by Charcharodon · · Score: 2

      California has a similar problem. Farming eats up the bulk of their water usage but they sell water to the farmers anywhere from 1/10 to 1/4 the price that they charge people in the cities. Then they wonder why the farmers are growing dumb ass things such as rice in the desert. Hint rice doesn't grow in the fucking desert.

    16. Re: Air into water by Anonymous Coward · · Score: 0

      I'm reshaping my tinfoil hat. If it's in the shaper of a W, it should work.

    17. Re:Air into water by thinkwaitfast · · Score: 2
      What heat? Dehumidifiers are basically AC units running in a closed environment. ACs are heat pumps, they move heat from one area to the other. The only heat that is added is the inefficiency of the systems (Eff = 1-Tc/Th, or something like that, I'd have to look it up + the heat from the motor + heat from friction of the gears). The hot air from the AC heat exchanger + cold from the heat exchanger cancel out (exactly if you had perfect efficiency and don't make room colder or warmer. You never have perfect efficiency, so you'll always add heat, but it's not a significant amount at least on the unit that I have.

      Note that it uses 7A max (measured), so 0.84kw on maximum setting and about 60l/day.

    18. Re:Air into water by Anonymous Coward · · Score: 0

      That's great, if they advance that money to me upfront so I could afford to get it done. Instead of posting cluelessly, you should learn a little about how business works.

    19. Re:Air into water by Trax3001BBS · · Score: 1

      Not moisture from air, but actually turning free hydrogen and oxygen in the atmosphere into water.

      Isn't that called a fuel cell?
      https://en.wikipedia.org/wiki/...

    20. Re:Air into water by Anonymous Coward · · Score: 0

      I can't be sure for California, but a big part of the reason for the price hike is probably (like here in Australia) that farmers and industry get sold untreated water and/or greywater, that is, a large portion of household water cost goes towards treatment.

      But yes, California should lay off the almonds.

    21. Re:Air into water by religionofpeas · · Score: 1

      Good thing too, or else the atmosphere on our planet would be pretty much Hindenburg-like, which would make for a very crispy planet every time there was lightning storm.

      Only once, I suppose.

    22. Re:Air into water by AdamCox3526 · · Score: 1

      You realize almost 50% of India doesn't even have electricity, right?

    23. Re:Air into water by Anonymous Coward · · Score: 0

      yep yep.

      It just needs to be big enough and run on Solar, Wind, Geothermal, Water, or natural convection.

    24. Re:Air into water by Anonymous Coward · · Score: 0

      But where will Leanardo Decrapio et.al. get their cheap almonds from?

    25. Re:Air into water by holmstar · · Score: 1

      The issue is presented as being a lack of any (dirty or clean) water being available. A solar still just purifies/desalinates existing liquid water. What they want is something that condenses water out of the air.

    26. Re:Air into water by Anonymous Coward · · Score: 0

      That is not true. Conversion from liquid water to vapor takes energy. This energy is released again, as heat, when ambient vapor condenses inside the dehumidifier into liquid water. The heat produced is between 3 and 4 times the electrical input energy. I use dehumidifiers in winter to keep bedrooms dry and warm.

    27. Re:Air into water by Anonymous Coward · · Score: 0

      Or you know for 20usd/ton you could truck the water in from ~120km away. Or you could use this awesome new invention called "pipe"(invented 2000BC or thereabouts) to transport water about 30X cheaper than with trucks.

    28. Re:Air into water by Anonymous Coward · · Score: 0

      and that is completely moronic
      (water heat of vaporization) * (water density) * 2000L / 24h = 51.65kW
      that is just the heat of condensation you need to sink somewhere (continuously)
      It will not solve any problems for anyone, because it would be outrageously expensive for measly 2m3 of water per day, it would probably be cheaper to airfreight water in from somewhere.

    29. Re:Air into water by Anonymous Coward · · Score: 0

      The heat of vaporization, you need to take same amount of heat out of water vapor to condense it than you need to put into water to boil it. 2.23kJ/g or 4.46GJ for that 2000L of water per day. High school physics is still valid even though its taught (unsuccessfully) to kids.

  2. Too bad for men. by Anonymous Coward · · Score: 0

    It would be nice if that safety device was not for a specific gender.

    1. Re:Too bad for men. by _Sharp'r_ · · Score: 0

      Magical devices are reserved for women. Men aren't so picky they demand to be able to automatically and inconspicuously send an alert from inside a faraday cage.

      --
      The party of stupid and the party of evil get together and do something both stupid and evil, then call it bipartisan.
    2. Re:Too bad for men. by cayenne8 · · Score: 2, Insightful

      The device would have to work even in cases where there's no cellphone signal or internet access.

      We already have this device, although it will cost you a bit more than $40...

      It's called a gun....

      --
      Light travels faster than sound. This is why some people appear bright until you hear them speak.........
    3. Re:Too bad for men. by Anonymous Coward · · Score: 0, Insightful

      ..and women's groups typically want to make those illegal too, because of 'intersectionality' with blacklivesmatter. Interesting since they want cops to have a monopoly on firearms while they accuse them of racism and abuse.

    4. Re:Too bad for men. by Anonymous Coward · · Score: 0

      That's because men *are* the safety device.

    5. Re:Too bad for men. by NFN_NLN · · Score: 1

      > Interesting since they want cops to have a monopoly on firearms while they accuse them of racism and abuse.

      Nice burn...

    6. Re:Too bad for men. by drinkypoo · · Score: 2

      There is nothing magical about a Personal Locator Beacon (this one was highly reviewed. I am not getting kickbacks. I am not getting referrals. I do not own one.) The $300 buy-in price translates to less than $40/year if it lasts ten years, which it might.

      On the other hand, it would be totally fucking useless even if it sent a ping straight to your local PD saying you were being raped, because by the time they show up, it will be over.

      --
      "You're right," Fisheye says. "I should have set it on 'whip' or 'chop.'"
    7. Re:Too bad for men. by Ol+Olsoc · · Score: 1

      > Interesting since they want cops to have a monopoly on firearms while they accuse them of racism and abuse.

      Nice burn...

      And lit the Strawman on fire.

      But of course, we live in a country where a background check is considered calling a a ban on all guns according to some friends.

      --
      The shepherds did so well protecting the flock that the sheep no longer believed that wolves existed.
    8. Re:Too bad for men. by Anonymous Coward · · Score: 0

      Especially considering that the vast majority of victims of violence are men.

    9. Re:Too bad for men. by mukinrestak · · Score: 1

      I bet if we started stamping out fresh versions of the Liberator pistol, we could get 'em under $40 a pop. Actually, I just checked. In 1941 each liberator cost $2.10 to produce, according to Wikipedia. That's $34.49 in today's money, according to the inflation calculator at http://www.usinflationcalculat... So who's got a prize for George Hyde or his descendants?

    10. Re:Too bad for men. by Rei · · Score: 1

      Let's help make it a bit clearer. Let's say you're the average US male height, weight and build - 176cm / 59" and 83kg/184lbs and a bench press of 165lbs. Picture an environment where everywhere you go, you're surrounded by men who average 192cm (64"), 105kg (231lbs) - with the weight difference being primarily muscle - with a bench press of 400lbs. On average. Basically, the average person around you is a NFL linebacker. Now picture that a good number of them are sexually attracted to you. That they're much more likely to be involved in violent crime than you. That a disturbingly high percentage of your friends and family have been molested or raped by them. Perhaps you yourself.

      Try to understand the difference in what the world is like for others.

      --
      "99 dead duelists of Dios on the wall. 99 dead duelists of Dios! Take one's ring, pass it around..."
    11. Re: Too bad for men. by Anonymous Coward · · Score: 0

      And good times had to all.

    12. Re:Too bad for men. by Anonymous Coward · · Score: 0

      Oy vey! It's Anudda Shoah, I tells ya! Anudda Shoah!

    13. Re: Too bad for men. by Anonymous Coward · · Score: 0

      That a disturbingly high percentage of your friends and family have been molested or raped by them. Perhaps you yourself.

      Except that doesn't happen. Women in the west are one of the safest groups in the world.

    14. Re: Too bad for men. by Rei · · Score: 1

      Right. Keep denying our reality.

      --
      "99 dead duelists of Dios on the wall. 99 dead duelists of Dios! Take one's ring, pass it around..."
    15. Re: Too bad for men. by Anonymous Coward · · Score: 0

      Heh. That's pretty much the way most white people feel around blacks. Maybe we should have weapons for specific races? Or do you Enlightened(TM) types have a problem imagining you how the world appears to other people?

    16. Re: Too bad for men. by Anonymous Coward · · Score: 0

      That's not the reality though. "disturbingly high percentage" how far did you have to dig up your ass to come up with this gem?

      Majority of those "linebackers" will kiss your ass and do whatever you want depending on how attractive you are or how much you can beach and moan about their "unfair" advantages. And if you don't get what you want you of course can scream "rape" and bunch of "linebackers" in white will run to defend your "honor" and beat the shit out of whoever looked at your "funny".

      One last thing. Bitch!

  3. Isn't this like an ancience technology by Matt.Battey · · Score: 2
    1. Re:Isn't this like an ancience technology by cdrudge · · Score: 1

      Well, go ahead and submit you idea. Building a 9000 m^3 stone mound doesn't seem very practical. And all the other implemented methods on that page with passive or renewable energy sources appear to make only a fraction of the 2000 liters the contest aims for.

    2. Re:Isn't this like an ancience technology by Archangel+Michael · · Score: 3, Insightful

      The 2000 liter requirement is kind of a deal breaker. If I have a 1 meter square device that can produce 50 liters a day, that would be way better than a 50,000 meter square device that makes 2000 liters a day.

      And in some places, gathering 2000 liters of water from the air is nearly impossible, in other places, it is almost trivial.

      And water isn't always the problem, it is usually "clean water" that is the problem.

      --
      Agent K: A *person* is smart. People are dumb, stupid, panicky animals, and you know it.
    3. Re:Isn't this like an ancience technology by ThosLives · · Score: 1

      I tried to see if there was any more information on the xprize.org site about their requirements - but it really does seem pretty sparse. They don't say how that $0.02/liter is to be amortized over time if it's to include capital costs, or if it's only variable cost. They don't say over what kind of area the device can be deployed (e.g. what is its footprint?), doesn't have relative humidity requirements, or anything like that.

      Maybe it's locked behind the registration page?

      --
      "There are a dozen opinions on a matter until you know the truth. Then there is only one." - CS Lewis (paraprhase)
    4. Re:Isn't this like an ancience technology by speedplane · · Score: 4, Informative

      The Wikipedia article is interesting. It mentions that one of the better existing devices generates 9,000 liters a year and takes up 6,500 sq. ft. of space. Assuming it scales linearly, 2,000 liters per day would require 527,000 sq ft of space, roughly ten football fields. If you could increase efficiency by a factor of 2 to 10, and similarly reduce costs, this x-prize challenge would be feasible.

      --
      Fast Federal Court and I.T.C. updates
    5. Re:Isn't this like an ancience technology by SuperKendall · · Score: 0

      Well, go ahead and submit you idea. Building a 9000 m^3 stone mound doesn't seem very practical

      Tell that to the Egyptians. They could do it I bet. And with slave labor, you can easily meet the price target.

      --
      "There is more worth loving than we have strength to love." - Brian Jay Stanley
    6. Re:Isn't this like an ancience technology by Anonymous Coward · · Score: 0

      And in some places, gathering 2000 liters of water from the air is nearly impossible, in other places, it is almost trivial.

      In Wales its almost unavoidable.

    7. Re:Isn't this like an ancience technology by Ol+Olsoc · · Score: 1

      And in some places, gathering 2000 liters of water from the air is nearly impossible, in other places, it is almost trivial.

      In Whales its almost unavoidable.

      FTFY

      --
      The shepherds did so well protecting the flock that the sheep no longer believed that wolves existed.
    8. Re:Isn't this like an ancience technology by Anonymous Coward · · Score: 0

      Put old water bottles under air conditioner runoffs. Old bottles are trash ergo free, conditioners and their power are already paid for ergo free. And a decent sized city surely has enough air conditiners. Doesn't really solve any problems, but should match the stated challange goals. Technically correct is the best kind of correct after all.

    9. Re:Isn't this like an ancience technology by Anonymous Coward · · Score: 0

      so 400 of your 1 meter square device...?

  4. Wrong idea! by Anonymous Coward · · Score: 0

    What they should do is find a way to pump water into the central Asian basins.

    All that wasted height of the Himalayas would be countered.

  5. droids by Anonymous Coward · · Score: 1

    I guess we'll also need a droid that understands the binary language of moisture vaporators.

  6. Have fewer babies. by ScentCone · · Score: 4, Insightful

    Better solution: Have fewer babies.

    PM me for an address to which to send that $1M.

    --
    Don't disappoint your bird dog. Go to the range.
    1. Re:Have fewer babies. by Anonymous Coward · · Score: 1

      Sex is free, and it feels good.

      I don't see how you can convince a billion, double-digit IQ people to stop.

    2. Re:Have fewer babies. by ScentCone · · Score: 3, Insightful

      It's called education and prosperity. If it weren't for immigration (and immigrants having lots of children), countries like Germany and the US would have shrinking populations. Once a population reaches a better level of creature-comfort prosperity, and aren't living a hand-to-mouth agrarian lifestyle, they stop having so many babies.

      --
      Don't disappoint your bird dog. Go to the range.
    3. Re:Have fewer babies. by Anonymous Coward · · Score: 0

      > Better solution: Have fewer babies.

      That's not a solution. It might be better if everyone else has less kids, but children contribute to each family and their labor is important for the family to survive. Therefore the incentive is for each family to have kids, having less kids means more poverty for the family.

    4. Re:Have fewer babies. by Anonymous Coward · · Score: 0

      Does India need some FREEDOM?

    5. Re:Have fewer babies. by ScentCone · · Score: 1

      The point is to stop being a third-world country so that - just like throughout the developed world, families don't feel the need to have so many babies to use as slave labor on the farm. There's a reason that countries like the US, or Germany, have their resident populations shrinking. Because people living more prosperously have fewer babies. And thus use far less in the way of resources like water (and especially, use it less wastefully than those who are doing old-school agriculture in a more primitive way). Prosperity makes for smaller families, which relieves stress on resources. So: India needs to stop carrying on like a third world country. Culturally, legally, governmentally, financially, agriculturally. And they will start having fewer babies. And need less water (and food, and energy, and everything else).

      --
      Don't disappoint your bird dog. Go to the range.
    6. Re:Have fewer babies. by Anonymous Coward · · Score: 0

      Freedom from religious restrictions on birth control is also required, although education does go a long way to achieving this (see for example the number of catholics who wisely choose to ignore the pontiff's silly restrictions on same). But yeah, once you remove the danger of starving to death in your old age if you don't have a horde of spawn to provide for you the pressure to churn out the offspring certainly goes down.

    7. Re:Have fewer babies. by Anonymous Coward · · Score: 0

      You are kinda stupid aren't ya?
      You've got cause and effect reversed.
      Having less babies won't make the country into a 1st world country.

    8. Re:Have fewer babies. by PPH · · Score: 1

      Whatever the solution is, it has to cost less than 2 cents a liter. Until they run into the next resource limitation.

      --
      Have gnu, will travel.
    9. Re: Have fewer babies. by Anonymous Coward · · Score: 0

      Population rates are locked in due to an effect called "population fill up" the world is going to have 11 billion guaranteed. https://m.youtube.com/watch?v=FACK2knC08E

    10. Re:Have fewer babies. by Anonymous Coward · · Score: 0

      The US population is not shrinking. What IS shrinking is the population of educated people who are choosing to have kids. As more and more people complete college, more and more of them are making the choice to delay or not have kids at all, or have only one child. This is the case in the US and other countries like Israel and Japan as well. Generally, where women are achieving more education and work options, they are choosing to have fewer kids and avoid the mommy track.

      When that happens, there are not enough children being born to maintain or grow the population.

      But, uneducated women or women who do not have an option for college or jobs do not avoid kids. In fact, they may tend to be stay at home moms in far higher numbers and have 2-5 kids. This means the population is surging for lower education and economic groups, aside from Japan where they tend not to have a lower economic group aside from some immigrant labor who are not granted citizenship.

      Israel is a very good example of this. The birth rate among Israeli Jews is declining, for the reasons noted. Modern Jewish women are pursuing work and other things just like modern women in the US and other countries. Having kids is not a priority. However, the same is not true for Palestinian women who do not have the same education and work options. They have no reason to not have kids, and they are doing so at a much higher rate. It was not me who said this but it remains true: Israel has won on the battlefield and they have won in science and education and so forth, but they have lost the war in the bedroom and eventually they will lose themselves. The Palestinians will simply gain control by being far more populous.

      In the US, various minorities are having kids at a much higher rate than educated whites, and as a result minorities will soon become the majority, or what some have called "the browning of America" as Hispanics become the dominant population.

      All of this is easy to measure from looking at birthrates and projecting out one or two generations.

    11. Re: Have fewer babies. by Anonymous Coward · · Score: 0

      Not burning the dead in the river helps too

    12. Re: Have fewer babies. by Anonymous Coward · · Score: 0

      India is filled with the most stupid people on the planet. No joke.

    13. Re:Have fewer babies. by Anonymous Coward · · Score: 0

      We did, only have one. Can afford to put one through college, but only by starting a college savings plan on day one. As much as we'd like to have more if you subtract the realities of life - basically access to resources - money, family to help (no one near by) etc, neither of us can arrive at the conclusion that having more kids is a good idea.

    14. Re:Have fewer babies. by religionofpeas · · Score: 1

      The slow down is birth rate is only temporary. Ask someone who understands evolution.

    15. Re:Have fewer babies. by ScentCone · · Score: 1

      Yes, yes. You're either actually a fool, or just pretending to be one so you can score some sort of lazy rhetorical points with an imaginary audience of lower-information-than-you audience.

      If you do the things that make you a first-world country, you'll have fewer babies and need fewer resources (like water) so you don't have to chase your tail trying to squeeze water out of the air. As usual, everyone is so paralyzed by political correctness that their afraid to point out that places like India are suffering a culture problem, not a water problem.

      --
      Don't disappoint your bird dog. Go to the range.
    16. Re:Have fewer babies. by AmiMoJo · · Score: 1

      We need both. The education programmes that reduce the birth rate are proven, e.g. Bangladesh went from around 9 in the 1960s to 2.2 today.

      The problem is that there is a huge amount of lag before we notice the world population levelling off. New parents today are from a generation that had more children, and their parents are from generations where 9 kids were the norm. And they are all living longer, so there is more overlap of their lifetimes.

      At the current rate we are on target for stability around 11bn people. Most of that growth will be in Africa and to a lesser extend South Asia. It's sustainable IF we have technology like this to make the best use of available farm land.

      --
      const int one = 65536; (Silvermoon, Texture.cs)
      SJW, n: "Someone I don't like, and by the way I'm a fuckwit" - AC
    17. Re:Have fewer babies. by Anonymous Coward · · Score: 0

      At the current rate we are on target for stability around 11bn people. Most of that growth will be in Africa and to a lesser extend South Asia. It's sustainable IF we have technology like this to make the best use of available farm land.

      It's not.

      We wouldn't even have this problem if the West stopped subsidizing food for the developing world. We would have 2 billion fewer people right now if US food aid never existed.

    18. Re:Have fewer babies. by Anonymous Coward · · Score: 0

      The problem is that if these two civilizations co-exist in a welfare state, the less reproducing will be overrun by the breeders. Developed countries typically consume a lot more resources per capita, but the equation goes both ways, a similar per capita resource consumption can not be sustained if the population rapidly increases. Population increase will lead to lowered living standards and/or war.

  7. they used to call condensation by Anonymous Coward · · Score: 0

    my how times have changed?,, cease fire stand down.. truth+mercy=justice,, in the moms spirit of creation & compassion we trust.. no bomb us more mom us.... hugs not thugs,, hand in hand we stand,, its in all the manuals..

  8. Jesus! by freeze128 · · Score: 4, Funny

    The next X-Prize will be "Turn water into wine".

    1. Re:Jesus! by Anonymous Coward · · Score: 0

      Or lead into gold.

    2. Re:Jesus! by R3d+M3rcury · · Score: 1

      I did that years ago...

    3. Re:Jesus! by silentcoder · · Score: 1

      Turning lead into gold is easy, but it's so expensive that really all you're doing is turning gold into less gold.

      --
      Unicode killed the ASCII-art *
    4. Re:Jesus! by Anonymous Coward · · Score: 0

      I think you mean: wine into water.

  9. obligatory star wars reference by rla3rd · · Score: 1
    1. Re:obligatory star wars reference by dywolf · · Score: 1
      --
      The guy who said the election was rigged won the presidency with the second-most votes.
  10. That's a lot of water to generate in a day by H3lldr0p · · Score: 2

    It's a little over 83 liter of water per hour, presuming this is meant to be running 24 hours a day. So I'm going to guess this is meant to generate enough water for more than a single family. Maybe a good portion of a village. The details are light in the linked article. What's the target area's relative & absolute humidity and the season? Is it even possible for certain areas of the world to do that?

    1. Re:That's a lot of water to generate in a day by mattwarden · · Score: 1

      You need to process a lot of air to get that much water out. At 100% humidity, there is only 0.000017 liters of liquid water per liter of air at room temperature. So you need to process 4,882,353 liters of air per hour to extract 83 liters of water per hour. And if you have less than 100% humidity, then its worse.

    2. Re:That's a lot of water to generate in a day by Solandri · · Score: 1

      2000 liters/day is a lot. About how much a U.S. family of 4 uses. You can make do with a lot less. India is around 130 liters/person-day. So I suspect this is more a one per 100-300 people concept, meant to provide potable water (drinking and cooking) so existing water sources can be used for things like bathing and laundry. That would help avoid things like the arsenic poisoning fiasco caused by relief agencies drilling fresh water wells in Bangladesh.

    3. Re:That's a lot of water to generate in a day by zwarte+piet · · Score: 1

      My toddler uses 83 liters a day just to brush his teeth.

  11. Wasn't this already done? by Eloking · · Score: 2

    I'm I missing something or this have already been done? There's even a Billboard that filter the humidity in air to make drinkable water : http://bigthink.com/design-for...

    --
    Elok
    1. Re:Wasn't this already done? by Anonymous Coward · · Score: 0

      In Africa, some people use nets to capture moisture from air.

  12. I call it "rain" by Anonymous Coward · · Score: 0

    I'll let you know where to send the check.

  13. That's not the hard part by zamboni1138 · · Score: 5, Funny

    Getting water out of the air is easy.

    The hard part is dealing with Sandpeople. They will steal your car, your droids... hell, even your wife.

    1. Re:That's not the hard part by zwarte+piet · · Score: 1

      My 5 year old son uses 83 liters a day to brush his teeth.

    2. Re:That's not the hard part by zwarte+piet · · Score: 1

      Argh, wrong thread

  14. Hardest Part by Stormy+Dragon · · Score: 4, Funny

    The hardest part of this XPrize will be finding an interpreter who understands the binary language of moisture vaporators.

  15. What a crock by Anonymous Coward · · Score: 0

    As with most of XPrize's "challenges", for any winners, the prize is chump change compared with simply taking the invention or accomplishment public. XPrize is just a PR firm with itself as its only client.
     

  16. um.. by Anonymous Coward · · Score: 0

    rain gutter. please send via PayPal

  17. Not going to solve the problem..... by Anonymous Coward · · Score: 0

    Depleting atmospheric water on any significant scale just makes things that much worse. Since now you are also dealing with artificial rainshadow.

  18. price money is always too low by Anonymous Coward · · Score: 0

    If I could do this, I'd want a hell of a lot more than $2 million.

  19. Sexist by Anonymous Coward · · Score: 0

    The $1 million Women's Safety XPrize calls for an emergency alert system that women can use, even if they don't have access to their phones. The alert would have to be sent automatically and inconspicuously to emergency responders, within 90 seconds, at a cost of $40 or less a year. The device would have to work even in cases where there's no cellphone signal or internet access."

    Women hell, I'll take one if you can meet THOSE requirements! I am guessing the magic needed for no cel and no Wi-Fi access won't come in under $40 a year since the cel ones cost more than that already.

    1. Re:Sexist by Anonymous Coward · · Score: 0

      Well, you could do it with something that just makes a REALLY LOUD NOISE if it weren't for that pesky "inconspicuously" requirement.

    2. Re:Sexist by PPH · · Score: 1

      So, can you finance the purchase of a Glock and a few boxes of ammo for $40 per year?

      --
      Have gnu, will travel.
    3. Re:Sexist by jonwil · · Score: 1

      Why not build something similar to those things they have on boats that you set off if you get stuck out at sea and need rescuing? Something that, when activated, sends a unique identifier (to identify who's device was set off) to a satellite along with some GPS coordinates.

  20. Location, location, location ... by Anonymous Coward · · Score: 0

    My device already does that. It is located right next to or in Niagara Falls and can produce 2KL an hour!

  21. My first job was programming binary loadlifters by sandbagger · · Score: 1

    Very similar to vapirators in most respects.

    --
    ---- The above post was generated by the Turing Institute. Maybe.
    1. Re:My first job was programming binary loadlifters by Anonymous Coward · · Score: 0

      Do you speak Bocce?

  22. What? by PopeRatzo · · Score: 1

    Maybe I'm not thinking this thing through, but do we really have so much extra air that we can start willy-nilly turning it into water?

    And wouldn't a better solution be to just start turning people into Soylent Green?

    --
    You are welcome on my lawn.
    1. Re:What? by PopeRatzo · · Score: 1

      Actually, maybe we should just start extracting water from people...

      Check with me during half-time of tonight's football game. I'll fill a few jugs for you.

      --
      You are welcome on my lawn.
  23. Problems with this by kuzb · · Score: 1

    This has already kinda been done using the hydrogen internal combusion engine. Not only will it create water from hydrogen and oxygen, it'll do work at the same time. The problem here is that the hydrogen can't just be plucked out of the atmosphere because it's so light it escapes, so you have to figure out where that's going to come from. You could buy it, but then you're not getting it from air.

    --
    BeauHD. Worst editor since kdawson.
    1. Re:Problems with this by 0100010001010011 · · Score: 1

      Forget Hydrogen. If I remember correctly 1 gallon of Diesel fuel generates 4 gallons of water. Now you just need to figure out condensing and cleaning.

      You also get a lot of usable work out of it as well.

    2. Re:Problems with this by kuzb · · Score: 1

      You can't get diesel out of the air either, so it probably wouldn't qualify.

      --
      BeauHD. Worst editor since kdawson.
  24. Magic by Anonymous Coward · · Score: 0

    The device would have to work even in cases where there's no cellphone signal or internet access.

    I have heard rumours of an ancient but powerful magical spell that can call upon the emergency services. Or summon giant eagles. I think it works on whichever of the two is closest.

  25. Done by Anonymous Coward · · Score: 0
  26. Dune? by LifesABeach · · Score: 1

    Does Frank Herbert have a patent on this idea?

    1. Re:Dune? by dunkelfalke · · Score: 1

      Ideas cannot be patented, only implementations can.

      --
      "It's such a fine line between stupid and clever" -- David St. Hubbins, Spinal Tap
  27. This needs more thought by Anonymous Coward · · Score: 0

    With global temperatures rising, is pulling large amounts of water from the air a good idea? I have no idea and am asking because this was the first thing that came to mind when I saw this. Seems like it might not be, but I have no idea.

    1. Re:This needs more thought by mattwarden · · Score: 1

      Water vapor is the most abundant greenhouse gas

  28. Patent it and make some real cash by Somebody+Is+Using+My · · Score: 3, Insightful

    Am I the only one who thinks that anyone who can make a device that pulls "2,000 liters of water a day from the atmosphere, using completely renewable energy, for at most 2 cents a liter" would be far, far better to patent the machine and then sell it themselves? The device they are describing would be so miraculous - not to mention useful - that the $2 million prize would be small change to what the inventors would get if they commercialized it.

    I mean, I'm all for encouraging scientists and don't think that science should only be about making money, but for what they are describing, they really ought to be offering a /real/ prize rather than what would be comparative pocket-change to the device's actual value.

    I mean, I read that the cost of desalinization in California costs ~$10,000 per person (and that's just for the cost of the building plant, not the power or the distribution); to desalinate enough water for the whole state would cost close to $400 billion dollars. A machine that could create water for 5 people (2000 liters is a little more than 500 gallons; Americans use about 100 gallons of water a day) for $40 a day would have municipalities breaking down the inventor's door. XPrize really should offer remuneration that reflects the importance and value of the invention.

    1. Re:Patent it and make some real cash by Anonymous Coward · · Score: 0

      Eh... not even plausible anyhow. At room temperature and 50% humidity, you would have to cycle through about 20,000 cubic metres of air every hour, assuming almost all of the water vapor can be extracted. It would cost about $4000 for the fans. And take about 3kW. Rig it up to 120 or so dehumidifiers (35L/day in those conditions) costing $30,000 and taking 96kW. Add in 100kW of solar, costing $200K, and you have all the requisite equipment.

      So estimated specs:
      Cost: $240,000 after shipping and installation
      Yield: Aprox. 2,000L each day under ideal conditions
      Estimated lifetime: 5 years (best guess)
      Cumulative Yield: 3,642,500L
      Cost per litre, over lifetime: $.065/L

      So all you need to do is cut the cost by about two thirds, either by decreasing initial investment or alternatively increasing function time. And of course, said device won't work very well in areas that aren't humid. And I'm probably not factoring in other stuff either. But a rough outlay is thus.

    2. Re:Patent it and make some real cash by drcesteffen · · Score: 1

      I think Dean Kamen might have solved this problem already.

      http://www.redferret.net/?p=10...

      https://en.wikipedia.org/wiki/...

    3. Re:Patent it and make some real cash by Anonymous Coward · · Score: 0

      It's "miraculous" to pay 20usd for cubic meter of water? Seriously? 1usd/m3 is considered pricy for desalinated water.

  29. Re:Women aren't safe? by Anonymous Coward · · Score: 0

    Clearly written by a man who only thinks with his little head.

  30. It will Not matter by Anonymous Coward · · Score: 0

    The exponential Birth rate in India will cancel out any gains.

  31. Women's Safety x-prize by Anonymous Coward · · Score: 0

    It has to be able to send an alert to responders within 90 seconds, discreetly, and work in areas with no cellular service or internet access.
    Welp, that's a million dollars that'll never be awarded.

  32. Re:Women aren't safe? by holophrastic · · Score: 0

    Umm, might want to look at what the women want. I guess it takes a man to say: get a dog.

    But hey. If a woman can't keep a man, then there's no betting that she'll be able to keep a dog either.

    Oh yeah, how could I forget: also she has 90 seconds. How silly of me. Even with 90 seconds, she needs help. I can't think of a place in my life where 90 seconds wouldn't already be enough for me to get away. But I've got 90 seconds, a dog, friends, a community, a cell phone, money, and a strong woman by my side.

    So now we're talking about women without any ability to keep money, nor to keep a man, nor to keep a dog. And they want it to be inconspicuous because they also don't want strangers to save them. So, no money, no man, no dog, no friends, and no community, and no phone.

    Yeah. Now that's a woman worth saving.

    Make the prize two million. You've got nothing to lose. You've already eliminated every solution that's worked for men for thousands of years. They're called friends. Strangers turned into friends, friends you brought with you, canine friends. Every one of them is totally and completely free-as-in-beer, or shall we say free-as-in-friends.

    Takes a women to want to buy a friend, I guess. A $40 friend.

  33. Re:Women aren't safe? by Anonymous Coward · · Score: 0

    It must have been really painful forcing that red pill into your dickhole.

  34. Isn't this not really solving the root problem? by pedz · · Score: 1

    Reading just the Slash Dot part (not the original article), it seems that India has a shortage of water so now they want to take it from the air. Well... fine. But that will dry out the air and if done to excess, will change the weather and ultimately, less rain fall will come down in other areas (or perhaps even the same area) of the water extraction plants. It just seems like a classic robbing Peter to pay Paul scenario.

    1. Re:Isn't this not really solving the root problem? by ElizabethGreene · · Score: 1

      2000 Liters of water is 0.001621429 acre-feet or 0.0002 hectare-meters. This device's effect on rainfall would be hard to measure. It is literally just making it rain on a more convenient schedule.

  35. this is it by bigtreeman · · Score: 1

    how cool is this

    http://waterseer.org/

    --
    Go well
    1. Re:this is it by Anonymous Coward · · Score: 0

      I saw Thunderf00t debunk it.

    2. Re:this is it by Anonymous Coward · · Score: 0

      It's also complete bs and probably a scam. Thunderf00t bothered to make a vid about it in his crusade against all the idiots on the internet.
      https://www.youtube.com/watch?v=LVsqIjAeeXw

  36. Bonus prize... by Anonymous Coward · · Score: 0

    Extra points if you can do it... in the cloud.

  37. Well... by denzacar · · Score: 1

    Over a few decades... sure.

    The "inconspicuousness requirement" might make that more like three or four decades.

    --
    Mit der Dummheit kämpfen Götter selbst vergebens
  38. I've got a solution by Charcharodon · · Score: 2
    My solution:

    Step 1 go up to Home Depot.
    ) Step 2 buy a length of hose for $10
    Step 3 connect one to each of the hundreds of millions of air conditions that dot the planets.
    Step 4 collect the condensation instead of letting it run down the drain.
    Use said water for toilet flushing, growing crops etc.

    I get 5-10 gallons a day off my AC during the summer. It probably averages out to 2 gallons a day for the whole year.

    That would be 200 million gallons of water per day or 73 Billion gallons per year assuming my 2 gallons a day as the average multiplied by 100,000,000 homes. sized air conditioners globally. 1 Billion dollars to retrofit 100million air conditioners. The hoses would last 10 years.

    Price per gallon. 1.4 cents per gallon

    Oh wait they wanted in Liters. ok. That would be 0.36 cents per Liter. 5.5 time under what they wanted.

    Pay up bitches.

    1. Re:I've got a solution by Anonymous Coward · · Score: 0

      As clever as you clearly think it is, that solution would not work in India, which is what they are talking about.
      Also, if you were talking globally, then you need to address within your costs the fact that you need to ship the water to where it is actually needed.

  39. Not very much... by Anonymous Coward · · Score: 0

    In fact, it's closer to heating than cooling.

    https://www.youtube.com/watch?...

  40. Re: Women aren't safe? by Anonymous Coward · · Score: 0

    How much is common sense. Don't go down the dark alley drunk whore. Don't go jogging in secluded areas at nighttime dressed like a hooker, slut. Lol. But really, common sense seems to be a bit scarce.

  41. why not just desalinate? by yanyan · · Score: 1

    Israel has been doing an excellent job of it. And India has more landmass directly adjacent to the ocean.

    https://www.scientificamerican...

    1. Re:why not just desalinate? by Shogun37 · · Score: 1

      I think doing this small scale dooms it to failure. As has been said above, producing that much water at that price would make the inventor another Bill Gates. Put the desalinators on the coast, use OTECS to power both the desalinators and the pumps. Sell the sea salt, harvest the fish from the OTECS runoff, profit.

  42. Water from air has been done by Anonymous Coward · · Score: 0

    Not at 0% humidity of course, that's just a silly idea even if you can find a few H atoms. IIRC there was a company that used a hygroscopic substance to absorb moisture from the air at very low relative humidity, then extact it. There were supposedly some deployments at military bases in Iraq or Afghanistan a few years ago, and that's the last I heard of it. Of course there were patents, but the idea is pretty simple:

    1. Get hygroscopic substance such as calcium chloride (I don't know what the company used, that might have been their secret sauce), and expose it to air for a while.
    2. Close the door on the batch and then expose it to heat, low pressure, or some other process that causes the H2O to come out so you can distill it.
    3. Open the door and repeat.

  43. did they google this? by Goldsmith · · Score: 1

    If the X-Prize folk searched "atmospheric water generator", they would find multiple commercial products that run on electricity. Then, they would simply need to set up a solar panel system, and they'd be done.

    I live in a desert, and have looked into getting one of these systems. The (commercial) system I'm looking at has a cost that would meet their guidelines for production and cost, provided a working life of about 20 years. That's... not unreasonable.

    Why don't we all use this technology? Because I'm billed for water (in the desert, in a drought) at $0.0015 per liter. If I'm really wasting water, and I get a fine for over-use, then I'm punished with a rate of $0.0036 per liter. If the cost for atmospheric water condensing was $0.02 (the X-Prize target), it still wouldn't be cheaper than aqueducts hundreds of miles long or ocean desalination (the two sources of my water). If they're going to have a cost target, it should be a lot lower. Really, they should be looking for creative ways to scale and capitalize the existing systems. We don't need more technology here, just different financing models.

  44. in case of no cellphone signal or internet access by thygate · · Score: 1

    make the phone go into wifi hotspot mode where the ssid is an asymmetrically encrypted string that is recognized only by phones nearby running the same App, which try to connect to the internet themselves, or do the same thing .. Or an emergency wifi network maybe ?

  45. This is like building that mountain in UAE by Anonymous Coward · · Score: 0

    The atmosphere isn't everywhere the same. Probably where they want the water isn't a place where looking for it in the atmosphere is going to help.

  46. Red Herring by Trevelyan · · Score: 1

    Turning humidity into drinking Water at suitable rate/quantity is a) completely impractical, and b) ignores the real issue of water treatment.

    Here is a case in point

    The more you watch that video, the more you'll realise how unrealistic it is to turn humidity into water. The video covers a specific case, but the generalities are true enough for any approach (e.g. conservation of energy)

    Also, as pointed out in the video, most people (and animals) gravitate to and settle near a supply of water (even in arid climates), the problem is however: making/keeping that water clean, safe and drinkable. Please solve that!

  47. Why? by LabRatty · · Score: 1

    Why waste time turning air into water when we already have the holy grail of turning air into alcohol?

    https://www.sciencedaily.com/r...

  48. Re:I've got a solution ^H^H^H^H^H^H^H^H problem by Anonymous Coward · · Score: 0

    Commodites 101: The commodity (water in this case) must be delivered at the [single] point specified (which is not in the US / EU / AUS (/ UK) / ENE Asia). Get your "costs" to include transport and recalculate. Remember, it must be potable at the point of delivery (not the point of production)!

  49. Recycle the water instead by Yvan256 · · Score: 1

    I heard stillsuits are efficient enough to allow someone to survive in a desert.

  50. Just women's safety? by Anonymous Coward · · Score: 0

    According to the MSM India is rape central but still, shouldn't we be concerned about everyone's safety? Sounds sexist to me.

  51. I won by Anonymous Coward · · Score: 0

    Go to a lake, toss some water in the air, catch water as it falls out of the thin air.
    I'll take a cashiers check please.

  52. Turning condensing water out of air by Anonymous Coward · · Score: 0

    No matter what, you are still stuck with energy it takes to condense water vapor into water ( the latent heat) and that is 2264.76kJ/kg. Next you have filtration cost so you had better have a big power plant someplace close.

  53. Re:I've got a solution ^H^H^H^H^H^H^H^H problem by Charcharodon · · Score: 1
    What you mean me using all that water in the first world is not stealing water from poor people in the third world?

    That is big news. Someone needs to tell the UN and all their little SJW, tree hugger buddies about it.

    You know though an extra 73 Billion gallons per year in the first world will have an impact on the 3rd. The tech for water capture will be made cheaper and make it's way into the 3rd. The extra food and manufacturing that will come with a drop in the price of water will result in more goods and services which too will find its way into the 3rd.

    You don't make people's lives better by showing up with a tanker truck full of water. You make it easier for them to get water on their own and they will.

  54. Don't Trust XPrize by Anonymous Coward · · Score: 0

    They will cancel the prize once you've won, they did it for the genetics big data prize...