WaterDrop or how to produce drinking water with solar energy in the desert

By 2040, 33 countries are expected to face extreme water stress, so the race to develop innovative solutions to produce drinking water is even greater. Ap Verheggen has been at the forefront of solar experiments for several years. Its latest concept is WaterDrop, a portable solar device that produces water by condensation. Ap acknowledges that the concept sounds a bit like science fiction, but solar technology has made great strides in recent years, so it’s worth taking a closer look.

If temperatures rise, the air contains more waterAp says on his blog. “Typically, higher temperatures also mean more sunshine. So why not focus on condensing water from the air, powered solely by solar energy? In this way, drinking water and water for agriculture will be available in most of the driest places on the planet.“.


The photovoltaic modules outside the device would absorb solar energy during the day. This energy would be used to cool the air and thus produce condensation, powering a fan to circulate the air. In theory, the resulting water droplets could be collected in a small tank. Ap recommends incorporating small stones into the design to add much-needed minerals, while a water filter would be placed on top of the device.

We know it’s still science fiction“Said Ap,” but surely increasing the efficiency of photovoltaic cells, (just a matter of time) as well as the development of new materials will help in the design of all these types of devices.