New technology: Harvesting fresh water from fog
Researchers develop a type of “harp” to harvest fresh water droplets from fog.
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Created and produced by QA International. © QA International, 2010. All rights reserved. www.qa-international.comCyclones look like huge disks of clouds.
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Created and produced by QA International. © QA International, 2010. All rights reserved. www.qa-international.comThe perceptible warming of Earth over the past 150 years has been caused by an increase in the emission of gases such as carbon dioxide, which amplify the greenhouse effect.
Transcript
For those who live in arid climates year round, water shortages are a constant concern. And residents must capitalize on even the smallest bit of moisture in the air. Researchers now have developed a type of harp to harvest fresh water from fog according to a report in ACS Applied Materials and Interfaces.
According to the World Wildlife Foundation, as much as 2/3 of the world's population could face water shortages by 2025. To combat this, fog harvesting can collect fresh water in dry climates. Current methods involve setting out a wire mesh netting to catch water droplets, which then fall into a collector.
If the wire mesh is too coarse, it cannot effectively capture water. But if the wire mesh is too fine, it gets clogged easily. Harp structures that use only vertical wires could avoid these complications. Building on previous proof of concept studies that tested harp like structures, Jonathan Boreyko and colleagues wanted to optimize the harps and compare them with mesh devices.
The researchers made three harp prototypes with vertical wires of three different diameters on support frames. The harp with the finest wiring was composed of steel, while the other two were made with aluminum. They then compared these harps with uncoded steel measures that had nearly the same thickness.
The harps consistently collected more water than the equivalent meshes at all wire diameters. In fact, the fog harp with the finest wires collected more than three times the amount of water as the finest mesh. The researchers also showed that the harp could be scaled up to a real world size.
According to the World Wildlife Foundation, as much as 2/3 of the world's population could face water shortages by 2025. To combat this, fog harvesting can collect fresh water in dry climates. Current methods involve setting out a wire mesh netting to catch water droplets, which then fall into a collector.
If the wire mesh is too coarse, it cannot effectively capture water. But if the wire mesh is too fine, it gets clogged easily. Harp structures that use only vertical wires could avoid these complications. Building on previous proof of concept studies that tested harp like structures, Jonathan Boreyko and colleagues wanted to optimize the harps and compare them with mesh devices.
The researchers made three harp prototypes with vertical wires of three different diameters on support frames. The harp with the finest wiring was composed of steel, while the other two were made with aluminum. They then compared these harps with uncoded steel measures that had nearly the same thickness.
The harps consistently collected more water than the equivalent meshes at all wire diameters. In fact, the fog harp with the finest wires collected more than three times the amount of water as the finest mesh. The researchers also showed that the harp could be scaled up to a real world size.