I Tried a Sand Battery - Here is Why It is a Game-Changer

Checkout Khadas mind by following links: Khadas Official Shop: bit.ly/khadas-mind ​Amazon: geni.us/khadas-mind Checkout SainSmart for affordable power tools: shrsl.com/4aw5q

This is certainly an interesting thought. I work at a sand mine where I dry sand with a giant rotating oven and send it to a silo; and a month after filling it, it still comes out of the silos very hot. I had not thought about how it held heat but it certainly is giving me a few creative ideas.

Please do build a larger sand battery!

5 hours for 5kg is not bad at all. It would be a pretty good system to put a sand battery in a basement of a home and store all the heat in there.

Maybe we should be putting sand batteries underground for better insulation? Another possibility is that we can store cold as well as heat. The idea is to create a temperature differential. It doesn't really matter if your thermal storage is hotter or colder than the ambient. So we could store heat in the day to power the night, and cold in the night to power the day. With refinements, there might be a way to use the heat differential between the heat store and the cold store to get a higher differential that's sustainable over the time it would take secondary system to charge its hot and cold sides. Or maybe you would need to rotate 3 or 4 systems depending on the recharge time. That's something for the research to figure out. That's a simplification as temperatures are more complicated than that, but it's the general idea. It's going to be fun watching the tech develop in this area.

Gravel is better suited for this purpose, because of the gaps between the individual stones they can easily be heated by passing hot air through them and then there is no need for copper tubes

One of my favorite topics! I wanted to build a prototype where I would put some sand in a (heat-insulating type)cement box, and have the heat transfer with (compressor)parts salvaged from AC. The whole thing(heating included) would run on some solar panels, so long term energy storage testing could have been made possible..

nice idea. Would love to see the bigger sand storage!

i want to see a sand battery built directly into the front or back yard. lets say 100kg sand battery and use a heat pump to heat it like a geo thermal setup

I would like to see you use a sand battery to heat a greenhouse at night. Heat the sand with a 12-volt electric hot water heater heat element that gets it's electricity directly from a solar panel. It would never actually be switched off. When the sun is shining the electricity from the solar panel heats the sand. At night when the sun is not shining the hot sand gives up the heat to the greenhouse. Can you do that?

You should try using a high power electric heating element that heats the sand from inside. Great video!

Ok so 55 gallon drum with 4 3in exhaust pipes running threw sand and a heating element in sand with R60 insulation around it cost is about $600

definitely would love to see you build a bigger one brother!

Great experiment sir. What if you heat the sand using an electric coil spiral inside the paint can with a solar panel? Thank you for sharing this great information with us. 🙏

Sand can keep heat for long time but during winter when you start to circulate cold water or aire to heat in that exchange you will lose all the sand heat very quickly.

I'm planning on building a 450 kg sand battery. Planning to have it done for next winter.

Use a resistor in the center. Like a water heating element. Don't go above/near the melting point of the metal the wires are made of

A full build video would have been better than the theory of a commercial company just a thought

We can also use sand battery for making electricity by using a steam turbine with a liquid with low boiling temperature.( we have to choose this liquid according to the heat capacity of sand battery). By the way, love your this type of videos.

Dear friend, Greetings from New Mexico! I very much enjoyed your presentation, and and learned much.... cheers!