Floating solar farms reduce water evaporation primarily through the shading effect their panels create over the water surface. By covering portions of lakes, reservoirs, or ponds, these solar panels block sunlight from directly hitting the water, which significantly lowers the amount of solar radiation reaching the water surface. This reduction in sunlight exposure decreases water temperature and therefore reduces evaporation rates by limiting the energy available for water molecules to transition into vapor.
Additionally, floating solar panels act as a physical barrier that limits wind exposure on the water surface. Wind increases evaporation by moving water vapor away from the surface, so by disrupting airflow just above the water, floating solar farms further reduce water loss.
The combination of shading and wind reduction can lead to substantial decreases in evaporation rates. Case studies show evaporation reductions ranging from about 30% up to 60-70%, depending on the extent of floating solar coverage and local conditions.
In summary, floating solar farms reduce water evaporation by:
- Providing shade that lowers sunlight-induced heating of the water.
- Acting as a physical barrier to water vapor escaping and limiting wind at the surface.
Together, these effects conserve millions of gallons of water annually and help maintain water quality in reservoirs while generating renewable energy.
Original article by NenPower, If reposted, please credit the source: https://nenpower.com/blog/how-do-floating-solar-farms-reduce-water-evaporation/
