What impact does wind have on solar still water collection?

Reducing Efficiency

Wind can disrupt the still’s operation by introducing air into the evaporation chamber, reducing the temperature difference between the hot and cold sides, and thereby decreasing the rate of evaporation. To mitigate this, stills can be covered with a solid roof or a tarp, weighing it down to prevent wind from lifting it. A minimum of 1-2 inches (2.5-5 cm) of weight is recommended to secure the cover.

Water Contamination

Wind can also blow contaminants into the still, such as dust, debris, or even wildlife, compromising the water’s quality. To prevent this, stills can be positioned in a way that the prevailing wind blows away from the collection area. Alternatively, a windbreak made from natural or synthetic materials can be constructed around the still to deflect potential contaminants. A 3-foot (0.9 m) high windbreak is sufficient to protect the still from most wind-borne contaminants.