Polyethylene modular floating covers to suppress evaporation losses and algae growth in water reservoirs
Technology demonstrated in relevant environment.
Representative model or prototype system, which is well beyond that of TRL 5, is tested in a relevant environment. Represents a major step up in a technology’s demonstrated readiness. Examples include testing a prototype in a high-fidelity laboratory environment or in a simulated operational environment.
Our company has already manufactured 300 small-scale modules of 0.15 m2 each one, which are being tested under laboratory and operational conditions since February 2017. Results from these previous tests have allowed improving the technological readiness of the technology (reduction of risks of failures, and rise of technical reliability). At the present, we are manufacturing modules at scale 1:2 in an experimental machine to cover a 1.500 sqm reservoir. Additional laboratory tests (wind tunnel and lifespan tests) and functionality tests in an operational environment are being performed during the next months in close collaboration with a research institution at SE Spain.

How does it work?

Floating hexagonal modules of 0.3 m2 are placed in the water reservoir one by one. Once modules are joined each other up to cover all the water surface, water losses due to direct evaporation are reduced, and the penetration of sunlight and photosynthesis (and hence algae growth) are prevented. Modules adapt well to water level changes by staying in the irrigation reservoir slopes. Overall, the system is able to bear wind speeds up to 90 km/h and have a minimum lifespan of 10 years.