Using a tethered airship floating high up among the clouds, the Air HES concept is designed to yield both clean water and electricity by harvesting and condensing water vapor, which it uses to spin up an electric turbine generator to create power. The developers behind the concept claim to have built a prototype to test their theory and have also conducted feasibility studies into upping the scale of their device to produce economically viable levels of water and power.
Using three proven technologies – water vapor condensers, hydroelectric generators, and airships – the Air HES (HydroElectric Station) is planned to be released up to a level of around 7,000 ft (2,100 m) to reach the mid-level clouds in the troposphere. Once there, it will use a large curtain of vapor-condensing mesh (similar to the system developed by MIT) to collect water.
The water collected from this process will then be released down a lightweight pipe attached to the balloon, where it will provide a significant head of pressure on its way to the ground. Large enough, the creators say, to provide more than enough energy to rotate the turbine on an electric generator and generate electricity.
The designers say they have produced and flown a scale prototype of the blimp and water collection system, which they claim produced around 4 L (1.05 gal) of water per hour for each square meter of mesh at 4,000 ft (1,200 m). The hydroelectric system planned for use on the system was not tested in this instance, though the creators do state that they have secured a Russian patent for the concept.
They are now working toward constructing a full-size, fully functional prototype of the complete system, and one that will be large enough to produce significant amounts of water and electricity. The team calculates that as a balloon 60 ft (18 m) in diameter yields around 7,000 lb (3,175 kg) of lift, this will be more than a sufficient size to carry the expected weight of the vertical tether and the water load collected.
At this size, the team says that power output – based on water collected per square meter of surface area – will produces around 1.8 kW of electrical power for every 10 liters (2.6 gal) per square meter of surface area. Given the team's ultimate goal of a 1,000 square meter (10,700 sq ft) mesh collection area, this would supposedly produce anything up to 185 kW, provided the predicted collection rates and energy conversion figures are correct.
To get the full-size system off the ground, the team has floated a crowdfunding campaign on Indiegogo, aiming to raise US$14,000 to build a working prototype. After the first prototype is operating, tested, and proven, the team hopes to attract further business investment to make the Air HES system a viable commercial proposition. This will then allow team members to pursue other proposed advances of their technology, including a kite-based variety for use as an emergency drinking water solution.
As such, the Air HES team also believes that its aerial system may provide other advantages, including ease of mobility and deployment on an as-needed basis for emergency power or drinking water, along with the possibility of using the flight platform to raise antenna systems for communications in remote areas.
No timeline has been provided for the release of a full-sized operational system, but the team has provided a comprehensive feasibility study (PDF) of the system.
The video below is the team’s Indiegogo pitch that shows the prototype in action.
Source: Air HES
Update (29, Aug. 2014): This story originally stated that the system will produce "around 1.8 kW of electrical power per day for every 10 liters (2.6 gal) per square meter of surface area." A number of commenters have pointed out that this is the incorrect unit of measurement for electrical power generation over time and has been removed. We apologize for the error and thanks to the commenters for pointing it out. We've also contacted the development team for more information on the projected power generation capabilities of the system – Ed.
A full sized one will require inspection and approval and be very limited to where it can be used.
The US$14,000 that they are trying to get for the prototype might just get the approvals necessary to get one up in the air then they have the cost of building it on top of that.
this is an incredibly insightful idea..even if it doesn't 'get off the ground'
kudos.
As for climate change, what a pity we have wasted so much time claiming it was all a hoax so that the fossil fuel industry could continue to make profits, and 'earn' their bonuses. We need to find a way of making those guilty of promoting that hoax meme donate all their wealth into a fund to help future generations cope, if they can. We owe them that much at least.
Dear Author, This does not make sense. If it generates 1.8 kW, that is a continuous rating as a 1 W = 1 J/s. That is, time is already included. You can say 1.8 kWh per day, but not what you wrote. Don't feel bad - I see this mistake all the time from technical journalists who didn't learn about units properly.
Where in this article does it mention using helium? Seems people are trying to find problems in this project that aren't even there. Besides, this is a MUCH better use for helium than the balloons they sell in stores. If not for something as valuable as this project, what are we saving helium for? Besides, there are 2 other options: hydrogen, and rigid structure containing a vacuum. Yes, that has been developed.
As for aviation clearance, I am sure that they could declare a no-fly zone. We have them all over the place. Besides, planes normally fly well over 7,000 feet. Besides that, if water is very scarce in an area, I would take water over flying anytime. If nothing else, this could be very useful in underdeveloped countries that have little air traffic and where water is desperately needed.
As for increasing global warming: A) Most clouds (about 90%) actually increase it by reflecting heat back down. B) These things would make a pinprick in the clouds C) This could probably work in any humid air, not just where there are actual clouds.
As for the idea that this is "stealing" water downstream, that is pretty silly. A) The percentage of the water that these could take out of the air is tiny. The effect on rainfall "downstream" could not even be measured. B) Very little of the water that falls as rain is utilized. These things would usefully capture all the water they take, compared to a few percent of the rain that is utilized. C) It would take an idiot in government to try to block this on that basis. Nobody would be that dumb. Opps, what am I saying?
All told, this looks like a very good idea IF it can be made to work. THAT is the big question. A new source of renewable water PLUS renewable energy could save lives in the global warming Hell we are creating.