WATER PRODUCTION UNIT

The water extraction technology system produces water through a condensation process during low temperatures (1 °C to 5 °C) on cold surfaces. Countries with a fresh water shortage are usually situated in a climate with a yearly average temperature of more than 23° Celsius and a relative high humidity. These are optimal conditions to extract water from the air.

The amount of water that can be generated is determined by regional variations in relative humidity. For example; for a structure situated in Dubai or Abu Dhabi, on the coast up to 7000 liters per year per sqm are feasible, compared to the desert region, where less than 500 liters a year per per sqm are possible. Overall, a yearly regional average of 4,745 liters (13 liter a day) per square meter can be taken as a realistic basis for computation.

The utilization factor is 65% on average. The water extraction system reaches approximately 30% of its capacity during the day; as the sun causes the extracted water to immediately evaporate as soon as it condenses on the front of the absorber. At night the system reaches 100% due to the high humidity.

The absorber is cooler than the outside temperature, therefore the humidity condenses on the natural stone absorber. The condensed water runs from a drip cup to a holding tank. After filtering it, the distilled water can be used as water for domestic use or can be enriched with mineral nutrients to obtain drinking water.

The amount of water generated from the air is determined by the following factors:
  • Relative humidity
  • Temperature
  • Size of the surface area on which the water condenses
  • Quantity of air transported over the surface

The coolant needs to be cooler than the outside temperature. Hence it needs to be cooled down by using the cool soil in order to save energy and costs. The coolant runs through the natural stone panels which are dug into the soil. If necessary an additional cooling pump can cool down the coolant.

Any surface that can be covered with stone, such as outer walls, garden fences, roofs and balconies, can also be used. The heat pump technology can be combined in a variety of ways with architectural stone elements to enhance the structure's appeal..