The Skoog Capillary Sweating Liana (SCSL) – Mechanical Water from Air (AWG)

The The Skoog Buoy Capillary Sweating Liana (SCSL) is a biomimetic infrastructure for autonomous, industrial-scale freshwater production. The system functions as an "Industrial Tree," utilizing the ocean depths as a cooling source and the natural kinetic energy of waves combined with solar thermal energy as driving forces.

Each Skoog Buoy produces between 12,000 and 500 000 litres of fresh water per day, depending on the size of the capillary filter and the desired output.

Units can be connected in series, and when the filter is scaled up to 5,000 square meters with a series of 11 units, production can reach approximately 5 000,000 litres per day.

The system is designed for 6–12 meter diameter buoys, combining high capacity with robustness for offshore deployment.

As the global need for freshwater is critical, the SCSL is designed as a ready-to-produce solution based on established technical principles and known technology. This eliminates the need for further prototyping and allows for immediate implementation to solve freshwater scarcity in the areas that need it most.

The system is entirely mechanical and requires no external electricity or pumps for its operation or water delivery to land:

• Wave-Driven Circulation: The kinetic energy from wave motion is utilized to drive the rotation and circulation within the cooling loop. This ensures a continuous supply of 4°C water from the depths to the surface without electrical power.
• Solar Thermal Boost: Solar energy provides a thermal boost to the system, enhancing the natural updraft and increasing the efficiency of the condensation process.
• Deep-Sea Cooling Source: A 1,000-meter closed hydraulic loop made of HDPE piping accesses the cold water from the depths. The insulation preserves the 4°C dewpoint temperature until it reaches the process unit.
• Solar-Thermal Chimney: A thermal collector chimney creates a natural updraft for continuous airflow across the cooling surfaces, replacing the need for electrical fans.
• Expansion Motor and Self-Pressure: The system utilizes the 0.43% thermal expansion of the produced freshwater. By heating the condensate with solar energy, sufficient hydrostatic pressure is generated to deliver the water to land via pipelines using self-pressure, eliminating the need for onshore pumping stations.

The Skoog Buoy is engineered to maintain clinical-grade water purity without chemical treatment:

• Sterile Environment: The condensation chamber is a cylindrical structure kept in total darkness to eliminate the possibility of algae growth or biofouling.
• Ultrapure Condensate: Because the system only handles sterile, ultrapure condensate water, there are no nutrients present to support biological growth.
• Redundant Protection: As an extra precaution, all vital surfaces are treated with the Skoog IAKKS active ceramic coating (Open Source). This coating uses kinetic micro-vibrations to prevent any mineral or biological adhesion 24/7.

The architecture is optimized for a 40 to 50-year lifespan using established, mass-produced materials:

• Established Materials: The structure is built using corrosion-resistant HDPE (PE100) and composite materials already common in marine industries.
• Modular Series Connection: Each SCSL unit is a buoy that can be connected in series to create large-scale water production farms.

The Skoog Buoy (SCSL) is shared under the Creative Commons Attribution 4.0 International (CC BY 4.0) license. Complete technical details are available in the official report:

• Technical Report (Zenodo DOI)
• WIPO GREEN Database: Registered for global technology transfer.

• Freshwater Access: Providing a stable and clean water supply to people and regions that currently lack reliable access to freshwater.
• Regenerative Agriculture: Irrigation in coastal deserts (e.g., Peru, Namibia, Chile).
• Disaster Preparedness: Robust infrastructure for island nations needing to replace vulnerable desalination plants.
• Green Hydrogen Production: An autonomous source of ultrapure water for offshore electrolyzers.
• Eco-Tourism: Freshwater supply for remote resorts without environmental impact or noise pollution.