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Aquahara - Water Generator
Instead of wasting energy to cool the air like conventional devices, we absorb moisture from the air in a salty liquid. Just like in a saltshaker that gets sticky, salt pulls water out of the air without cooling it, even if the air is very dry. The salty liquid is pumped from the absorber into a distillation unit, where it is heated using solar energy to extract water vapor and is then returned to the absorber to restart the cycle.
So, we built a liquid desiccant dehumidifier. What is so special about our system?
No noise and less space
The salty liquid needs to be heated to extract pure water vapor. We use heat from solar thermal collectors because this is more cost-effective than solar electricity and most importantly: solar thermal collectors need less space for the same amount of power, and they do not make noise because there is no compressor.
Lower cost
We pump our salt solution in a closed cycle with dual use: once to absorb moisture out of the air and once as cooling liquid for a heat exchanger that cools our condenser and turns the water vapor into liquid water. This eliminates the need for a separate cooling system and reduces the system cost. Aquahara has been awarded an international patent for this approach.
Higher efficiency
Because we use a liquid instead of a solid absorber, we can pump it through liquid heat exchangers to recover 90 % of the heat between the absorption and the distillation stage. And we also use an air heat exchanger to recover 90 % of the heat from the air flow between the evaporator and the condenser stage.
All-season water production, even in very dry climates
Even if air humidity levels are below 20 % during hot summer afternoons, the Aquahara Water Generator can absorb water during the night, when it is slightly cooler and humidity rises. Our liquid absorber makes it easy to store the water in salt solution tanks and run the distillation process using solar heat during the day. So, we do not need a large and expensive battery because we only run one small pump and a ventilator at night. Competitors using solid absorbers cannot store much water.