Original A2WH Product
The A2WH system produces pure potable water from air using only solar energy. It operates with a much lower operating cost than other AWG systems because it does not require large amounts of electricity. The A2WH system absorbs moisture at night when humidity is relatively high and converts what it absorbed the prior night into liquid water the following day using solar thermal heat. Well over 90% of the energy used in the system is solar heat. A2WH is a new generation of solar powered atmospheric water generator device (AWG) which are also known as water maker devices (WM) and Water Air Extraction Devices (WAED). A2WH is not a fog or dew capture system and uses a completely different process.
In A2WH systems all condensing occurs at near ambient and does not require any refrigeration. Air filters are used to filter the air before the absorption which keeps the interior of the system clean. A small amount of energy is delivered by Photo Voltaic panels which operate a microcomputer control system, sensors, blowers, pumps, etc.
Imagine the ability to deliver safe drinking water in places where there is no power, no safe ground water, no available surface water and no viable rain capture. Imagine doing this where there isn't even any salt water or where the salt water is too contaminated to allow effective treatment.
Every day solar heat cycles 1,356 cubic kilometers (358 trillion gallons) of water through the atmosphere. A portion of this blows over land where our AWG units can capture it and turn it back into fresh, pure liquid water usable for drinking, cooking and crops. Our A2WH units can do this in the hottest deserts and in fact run best in hot sunny locations where water is needed the worst. We do not need rain, fog or any other form of precipitation.
Our A2WH design has few moving parts which are easily serviced and can use low grade heat from simple solar collectors. This systems unique design makes it environmentally friendly and suitable for cost effective scaling from small household models through industrial and institutional systems producing many million gallons per day.
Water is essential for human life. We drink it and use it for our crops. Water is already scarce and becoming ever more valuable. In fact the UN has predicted wars over access to fresh water. Shortages of water in California have already caused more than 100,000 acres of farmland to lie fallow as a result of the 2008 drought.
Over 70% of earths surface is covered with water but very little of this water is useful for humans to drink or grow crops. 97% of all water is saline contained in the oceans which leaves only 3% as freshwater. 70% of the freshwater is locked up in ice leaving 22% as ground water and surface water. Ultimately less than 1% .of the world total is represented in lakes, rivers and wetlands.
Adequate water is essential for economic and political growth and stability. Our technology is specifically designed to deliver water in locations where unsafe or insufficient water is available. It was invented to allow continued development in areas where all other water sources have been exhausted or are fully allocated.
Ultimately we hope to see our water from air technology used to reverse desertification by providing sufficient water to establish green zones in the deserts. This will ultimately reduce food insecurity, reduce the risk of drought induced famine and reduce the poverty induced when people are forced to scavenge on a day to day basis just to obtain enough water to meet their basic needs.
The A2WH system uses a desiccant to absorb moisture from the air. The higher the humidity the more water our desiccant can absorb per pass which increases production.
We use solar heat to drive both the airflow for the absorption process and to provide heat during the regeneration process which extracts the moisture from the desiccant and allows us to capture the water in liquid form.
A sophisticated micro controller based sensor system determines when to switch between absorption and regeneration modes. We use different types and amounts of desiccants depending on the local conditions to optimize the performance of the system. A small Photo Voltaic solar panel provides power for the micro controller, sensors, various valves, etc.
We have an optional enhancement that uses wind energy (wind over 4.5 MPH) to drive circulation at night when the relative humidity is higher. To make this work best we increase the weight of the desiccant used in the system. In some areas with good nightly wind this allows the unit to work in areas with daytime humidity as low as 10% We have optional enhancements which allow electric fans and heaters to augment or replace the solar heat.
The input air is filtered before it enters the absorption chamber where the desiccant absorbs water out of it. The air is re-filtered when heated for regeneration. A final stage of filtering is used as the air enters the condensation phase where the H2O is turned into liquid water. As a result the output water is very pure. We still recommend treatment using a NSF 54 grade filter prior to consumption because we do not have any control over the cleanliness of the storage tank.