Ok so the basic idea is that sand is literally used for friction purpose. We use it smooth things, create the perfect magnifier of energy and waves, which is glass, and we use it for other purpose less needed to speak of for this cognition.
The basic idea would be to create a vacuum that uses minimal energy from the sun or temperature around it. Then it causes the sand to be sucked into a system that creates a whorl wind in which the sand is creating friction around its own area of atoms. Then the idea would be and the actual necessary need for patent would be how to collect the actual energy from this friction creation.
The ide is like sand. That which by using gravity the sand can flow through ares in which it creates friction. then how to create this friction catcher without bugs is the key. As the non energy flow system from ground to energy is much easier to cognition. So the problem then is how to get enough energy out of a sand generator to make it feasable and do it with core basic non rare earth resources is the scrutiny for the scientific process.
The reason for this idea is most allcountries have an abundance of sand.