3 ms·
You can pump sand by bubbling compressed air through it. 1. https://www.youtube.com/watch?v=My4RA5I0FKs https://www.youtube.com/watch?v=My4RA5I0FKs
by non-chalad 3y ago
You can pump sand by bubbling compressed air through it.
1. https://www.youtube.com/watch?v=My4RA5I0FKs https://www.youtube.com/watch?v=My4RA5I0FKs
- clort 3y agoseems to me that this would result in heat-loss as the air is heated quickly then ejected from the mass. perhaps the bubbled gas doesn't hold a significant amount of heat though? (but if it did, it could be used to extract the heat without pumping the sand...)