> The potential downside is that this system requires energy to release the water – the base of the device needs to reach 184 °C There are heat pumps that can

> The potential downside is that this system requires energy to release the water – the base of the device needs to reach 184 °C There are heat pumps that can go up to 200°C now, and if it’s already a hot environment I imagine they could be fairly efficient. The “cold” side could be connected to some black panels facing the sun. But this would require a facility on an industrial scale so not something for a single home. Maybe a small village.