Modular low-cost atmospheric water harvesting system for commercial rooftops

Overview

This innovative atmospheric water harvesting (AWH) system is designed for commercial rooftops, transforming passive surfaces into active, resource-generating assets. By utilizing low-cost polymer-based sorbent materials, the system captures water vapor from the atmosphere and regenerates it into usable water through passive solar-driven thermal desorption. This modular design allows for independent operation of each unit, enabling scalable installations suitable for various roof sizes and geometries. The system is compatible with common single-ply roofing materials and provides economic and environmental benefits by offering a decentralized water source for applications such as cooling tower make-up or direct drinking.

Technical specifications

• Modular design: Each module functions independently, allowing for scalable and flexible installations across different roof configurations.
• Polymer-based sorbents: Utilizes low-cost materials that effectively capture atmospheric moisture.
• Solar-driven regeneration: Uses passive solar energy for thermal desorption, eliminating the need for external power sources.
• Compatibility: Suitable for installation on single-ply membrane roofs such as EPDM, TPO, and PVC.
• Water storage: Harvested water can be stored for various on-site uses, enhancing building resilience and reducing dependency on external water sources.

Technology readiness level

Currently at TRL 5, this technology involves prototype development and field testing. Future steps include optimizing the yield-to-footprint ratio, conducting pilot deployments, and validating integration strategies for long-term compatibility with roofing membranes. The goal is to advance to TRL 6-7, with potential commercialization through leasing or performance-based contracting models.