Water From Air

Atmospheric water harvesting

In the western US, we are accustomed to long periods of drought. Plants and animals in this region are well adapted to the arid landscape, but climate models predict our current equilibrium will deteriorate over the next few decades, causing us to experience more extreme swings between drought and deluge. Virtually half of the earth's human population already struggles with water scarcity and sanitation as it is, and climate change will only increase these stressors. In response to this crisis, I began researching existing technologies known as atmospheric water harvesters. These devices convert moisture in the air to water using the basic principles of condensation. With this project I set out to understand the science and apply it towards new product applications.

Step 01

My first step was to recreate a research paper published by MIT, “Dual-Stage Atmospheric Water Harvesting Device for Scalable Solar-Driven Water Production”. However, I quickly discovered the materials they used were no longer commercially available. After consulting with a physical chemist, I experimented with a novel material composite that could passively boost the process of condensation. Moisture is absorbed at night, heated by the sun in the morning, and condensation forms via a temperature differential. I then built prototypes and tested them for feasibility.

The Garden of Life Support

These experiments were conducted in the summer in the high desert, with daily humidity levels between 5-40%. Under such conditions, the system was successful in producing only a small amount of water. I must continue the research to optimize for increased productivity. However, even small amounts of water may make the difference in certain contexts, and to certain creatures.

Below are designs for planter boxes that utilize the above system to create their own water. These could potentially protect potted plants or home gardens under drought conditions, especially if water rationing is necessary Though small scaled, this system could extend food production for home gardens, or provide water to insects and animals that might otherwise go completely without for extended periods of time.