A2WH.com - Harvest Water from Air

The XDOBS night radiant condensation System  is a truly green (environmentally sensitive) water from air extraction system.  It not only produces water from air but does it without any external electricity or fuel, It uses almost no moving parts and generates a single waste product cold air that can be used to reduce electricity consumption for air conditioning.    

Unlike many other designs A2WH is immune to power outages and disruptions like municipal water failures which make it ideal for areas that experience hurricanes.

Once installed it operates for it's entire design life without requiring grid power or fuel which makes it immune to rapidly fluctuating energy prices while the very small number of moving parts make maintenance as simple as an occasional dusting.   Freedom from the grid makes it ideal for use in areas where electricity is generated using expensive natural gas and oil.

It even uses a cyclonic dust separator to remove a majority of all dust and bacteria from the input air without requiring filter replacements.

Unlike other designs it sheds heat to the night sky which actually reverses urban heating problems and it does the opposite of most (Water from Air extraction)  units by providing cold air that can be used to cool buildings rather than dumping a bunch of heat into the building which must be removed by an air conditioning system. 

When combined with a enriched humidity stream the night radiant system can operate in just about any area and in any season.  When operated without an  enriched humidity stream it requires areas where the dew point at 10:00 pm averages within 6F of the ambient.  These conditions are very common in areas where the relative humidity during the late afternoon exceeds 72%.

System sizes start at 6 liters per day and expand upwards past millions of liters per day.

Create water out of the thin air
without electricity or fuel

This is really possible.   Actually man has been doing it for thousands of years.   Early examples where large piles of stones followed by routing air through cold caves.   You see the same principle in operation when morning dew has settled on the front lawn.  

The A2WH Night Radiant system design simply makes it work on a lot more days,  captures the water in a safe pure form while making it cost effective and without consuming a bunch of fuel or electricity.    

Other modern approaches

Modern companies have built a variety of units that harvest water from the air.  The category of units is refered to as  Atmospheric water generators (AWG).    A better generic name is  Water from air Extraction (WAE) but is not nearly as popular.  Most of these are modeled loosely on portable air conditioning units and they represent a very valuable niche and are very competative with bottled water systems.   

Several of the AWG companies claim to be the first but dehumidifiers using similar principles have been around for over 100 years.   We expect the electric AWG  units to be very popular in larger cities where space is at a premium and in areas with cheap nuclear or hydro electric power.   

We expect the night radiant system to be most attractive in rural and urban areas dominated by 1 to 3 story homes.   The night radiant system will be most beneficial where electricity is either unavailable or expensive especially in areas where electricity is generated from expensive natural gas, oil or diesel.   

The night radiant system will be highly attractive in areas that experience disruption of both the electric grid and municipal water system by natural disasters such as hurricanes.

Environmentally friendly

We felt a truly environmentally friendly approach that could work in regions where electricity was unavailable, expensive or unreliable was needed.   

We felt it was critical for the new technology to operate without requiring any external electricity or fuel and mandatory for it to not emit any greenhouse gases directly or indirectly while in operation.     

Large scale desalination plants can emit  millions of pounds of carbon dioxide per month and we felt it was necessary to have an industrial scale alternative which emits nothing.

Highly scalable

The night radiant system is highly scalable and can be provided in sizes from small systems which produce  6 gallons (22 liters)  per day upthrough systems which produce 100,000 or more gallons per day. 

In the larger industrial sizes the system can be very competative with coastal desalination especially in areas where enviormental concerns make large industrial plants right on the coast problematic or where sufficient power is not available for large scale desalination.     If the electricity uses for coastal desalination is obtained by burning fossile fuels the night radiant system a much better alternative.

Powered by the cold of the night sky

The A2wh.com (Air to water harvest) night radiant condensation system uses a small amount of photo voltaic power to run a microprocessor but most of the power is supplied by the cold of space using the same radiant cooling techniques used to cool spacecraft and billion dollar telescopes.

As compared to electric units the A2WH night radiant system can produce similar amounts of water while eliminating greenhouse gas emissions.   Even small systems will reduce carbon dioxide emissions by thousands of pounds per year as compared to electric powered units.

As shown in the ROI pricing analsysis document the night radiant system can be upto 20 times more cost effective than grid electricity and even small systems can out perform photo voltaic powered electric systems by 500%.  

Additional resources

• FAQ - Facts Answers and Questions
• Renewable water from air
• Operation with a enriched humidity stream
• Water from air with reduced greenhouse emissions
• Renewable cooling without greenhouse emissions
• Basic introduction night condensation system
• Budgetary price estimates
• ROI - Pricing analysis  as compared to electric systems operating from photo voltaic or grid power.
• project planning and preparation
• Solar thermal powered Water from Air
• Product overview from used on trade key
• Introduction for emergency response agencies

New March 2007:

Extracting Water from the Humidity in Air

• Patent  Pending
• Powered by the cold of space.
• Uses black body radiant cooling just like space craft.
• Almost no moving parts.
• Widely Scalable
• High Purity Water
• Deploy on land where there is no water.

Other AWG units

There are dozens of AWG which are electrically powered supplied from the USA, china, Inda and Austrailia.  Every one of these units consumes either fuel and or electricity and as such can indirectly contribute thousands of pounds of greenhouse gas to the enviornment.

Some of these can run from Photo voltaic power but they require a lot of power and by the time sufficient solar panels are purchased they simply are not competative with our the night radiant condenstation system.

Solar thermal A2WH

The XDOBS Solar thermal powered A2W converts heat energy from the sun into gas expansion which is used to drive a compressive chilling process.  By skipping the need for conversion to electricity and back the solar thermal process allows an incredibly efficient process that is ideal for scaling to very large implementations.

 It has the abiliy to operate in enviornments with Relative humidity under 20%.  

The solar thermal system tends to require more moving parts which move at much higher speeds than than the night radiant system which makes it more expensive except in very large installations such as multi billion gallons per year systems.

 The primary advantage of the solar thermal system is that it operates in a broad range of enviornments including very dry deserts. 

XDOBS.COM LLC 800-658-8745