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I'm an engineer working with Nitinol, Ive been working on a way to power a ranch using a Nitinol engine that uses a sand battery for its needed heat exchange during the nightime hours. I dont know why anyone isnt working with this very simple and very effective technology but they should be. Its something most handy people can build and easily power their homes
Maybe make a big metal spiral (or few of them), like in electric oven, then put them inside the sand, to heat it up to at least 250-300 Celsius or much more! Can end up requiring few kW of power (with few spirals), but looks like a decent idea to test it. And it would be great, if you really decided to repeat the experiment with bigger container! ♥
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.
Yeah just have the boiler surrounded with sand with the pipes running through it then if it ever goes out if you built your house with like a 2 ton sand box around the boiler it would heat for ages this concept is amazing for getti g rid of heat from servers usefully 😊
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..
I wanted to build it too, with double sheet metal enclosure with glass window on the outer enclosure and vacuum between those two metal enclosures. Would use mirrors to direct sun energy trough that mirror to heat internal enclosure with sand inside. There would be pipes around outer encloser and it would be well insulated. So when you want to heat the water that you are pushing through those pipes, you just lower the vacuum between those two enclosures and the heat from inside enclosure start to heat outer one with pipes..
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.
They did that in the olden days with wood chips. They would bring in ice from a lake or river and put it in the persons chosen area and cover it with a pile of wood chips.
Just because it’s called a “sand battery”, you don’t need to use sand. If you use stone chips, . (Like a big Finnish sauna heater.) You can force hot air through it over a heating element to heat it quickly, and later circulate air through it and through a heat exchanger to extract the heat. Then ideally store it all in a giant vacuum flask.
It'll burn out the heater element out as the sand doesn't take heat away fast enough. You could regulate the current but... that defeats the purpose of storing the heat as you couldn't charge it very quickly. You really need some way to move the heat through the sand (that's why they use numerous tubes with fluid flow throughout the sand mass). Otherwise you end up with a really hot spot, and the rest remains cold. That's what happened with his first "heating from the bottom." There was nothing to move the heat up through the sand. Easy problem to solve with pipes and a fluid. Hard problem to solve with a "bucket of sand and copper conductor poles." But I live somewhere cold... and I would buy/make something like that if I needed to temporally shift my energy consumption dramatically.
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
Wouldn’t that make the storage less dense for heat retention? There would be more air in between, and from what I understand air cannot hold a lot of heat. Else, they should have made a tank of air instead of a tank of sand. But I’m no scientist.
Absolutely true! Density is the stone size factor, so round pebbles not better choice, rough Rock size provides rapid heat transfer and air circulation through lauers
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.
sand will heat up slowly and release the stored heat slowly to air. With waters higher storage capability, it's like this would drain the sand of heat much faster than air.
This tech is in use for district heating already. I suggest you Google it and read up on it. It's a great way to store excess solar energy as heat on cold but sunny days. It's apparently pretty efficient.
take the specific heat for SiO2 hen youo can calculate how much calories you can store and extract, likewise use the specif hea of air and a well insulated house and do the reverse.
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?
There is are videos of this on YT. People use solar back packs and buckets for shelter and tent heating. You can put several of this in your greenhouse, they will work perfectly!
The DIYers who have tried this found that they needed to swap out the water heater for a stove coil. The water heater element was burning up without being submerged in water to cool it. Also expanding the stove coil so that the heat dispersed better throughout the sand seemed to have better results.
are you going to record it? Ireally like this idea of sand battery- I alsow atch off-grid Mike who done some prototypes and he is currently building the large one.
@@shadowmistress999 I will record it once I'm done with collecting the sand. It's gonna take 48 hours total. I've come up with the best design possible to have the most efficiency. Now it's just a matter of building it. Still need to research more on the heating rods and the container type.
I want to experiment with this eventually off grid, the idea of using air as the transfer medium is genius, don't have to worry about freezing or boiling of water, or other liquid used. I'm thinking if designed carefully it could be used for a hydronic floor heating system. The key would be to design a heat exchanger to extract heat from it at a safe temp range to use for the floor system.
Tried that, it works, but the problem with the electrical resistor is the short circuit protection. The heating element should not touch itself or the cage it is in. My practical thinking was to put it in clay/ceramic to be sure it can't move.
A rocket mass heater design ... Instead of only burning 4 hours to get 24 hours heat you just burn it until your mass meets your temperature requirement, add insulation and then I would send it underneath greenhouse beds to keep greenhouses warm for free as well as your homestead... excellent excellent research and calculation formulas 🎉🎉and
So a sand battery and a slow speed underwater turbine call Wateroter gives you a 24/7 100% clean heat and power source. You only need water moving 2 to 5 miles an hour, these units can be moved if needed and won't harm fish. Made in Canada the Canadian military is replacing diesel generators in the far North with these units. By installing these units below all existing Dams most states could produce more power to sell to other states.
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.
@@engineericly Sir, I don't really know about those types of liquid but I'm pretty sure that these type of liquids are there. I was just proposing a idea but if you research than you could find this liquids. Or if you don't find any, do the thing science is known for, that is "experiments" with different liquids.
@@engineericly I thought for a while and came to conclusion that alcohol could work. (But take everything I said/wrote with a grain of salt because I'm no expert on any of these things, I'm just proposing a idea with my knowledge from my science lesson that states that every liquids have different boiling point)
@@engineericly any alcohol should fit the bill. but i would encase a copper coil in the sand and then use car anti-freeze in the coil. use a double boiler to get water steam from the antifreeze heat.
Instead of using a liquid with a low boiling temperature, you can use a water's vacuum boiler/heat exchanger to produce steam. Vacuum boiler brings the boiling point of water significantly down
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
Not my idea, but I think it is a possible winner. Imagine that about once a month, a lorry arrives and switches out your 'empty' tank, for one full of thermal energy. If you have a large Gas, or oil tank, it would typically be one to two cubic metres, lets say 1.5M3. This would store 2-2.5 MWh of heat, if filled with sand at 500C. Even allowing for losses (it would be very well insulated) this would keep an average home toasty for a month. Installation would be as simple, as removing your boiler and pumping the water through pipes in the sand, and connecting your hot water pipe, to where your normal boiler outlet pipe is. No new plumbing required. In Ireland it would work quite well, as our wind resources coincide with the winter, but surely it must be possible to have some huge underground warehouse, storing hundreds of thousands of tonnes of sand, which could be designed to keep its temperature for months. Ideally, storing solar from summer, to heat us in winter. I used to say 'How about it science?', but here the science is established for millennia- heating a stone in the fire and taking it to the bed area at night. Other than insulation improvements, the manufacturing and engineering are well established, so 'How about it investors?'
Make a bigger sand battery using Solar panels and heater coils please. If it can reduce the evening peak hours that will be a big save for the world. No need to run overnight.
I want to make one too. FYI I got a river near me to collect enough to build enough of them to give heat to 15 houses without the city knowing about it. I am planning on using solar panels to power them.
Just fill the drum with water. Seriously. Cost is less, effort is much lower, and you don't need to store it at crazy high temperatures to take advantage of heat capacity. And you can move it around more readily. And you'd never burn out your element. Unless you need really high grade heat (above 100 C), with its very high heat capacity coefficient, water is the best BTU/$ heat transfer fluid you can buy. For a grid-scale solution, you need high grade heat and so you have to go to sand/gravel, concrete, oil or pressure vessels. But for single family residential scale? Just use water.
I think thermal storage of one sort or another is going to be absolutely huge. When I finally get a little place of my own, it is going to be a large part of my projects. In Ireland, approx 10% of renewable energy (almost entirely wind) is curtailed. That is enough to heat thirty homes per turbine. A typical wind farm here is 100 x 3MW turbines, and naturally the NIMBYs are out in force. Imagine the energy company said that the closest 3000 homes, will get free heating, for life! (Imagine how your property value would increase, if that was part of the deal.) I think many people would then be fighting to get wind turbines in their area.
TRY THIS - put lots of copper plates,in a star pattern, from top to bottom - the plates wil rapidly take heat to all areas- also- not many people have a furnace!!! ANOTHER IDEA- use copper tube in the same way as is used in steam train boilers, put tank lengthways - you also get a larger surface area for your heater - again,use copper sheet to transmit heat along length of container. Also- your container is in air- try digging a hole, and putting several layers of insulation around container, with a multiple layers of insulation lid- heat losses are highest at top of container,as heat travels upwards. Look forward to your homesize one- you can also buy readymade ones....👍👍👍👍👍🤔🤔🤔
I've been thinking the same thing. At this point in thinking about it I'd like a rocket heater on a dolly with the sand as mass. The large rubber tires make it easy to move outside to fire up the rocket heater to heat up the mass before night fall. Then put the rocket heater fire out and wheel it indoors to radiate the heat for hours. Even without a fan on it, it would slowly release through the night which is fine. Separating the rocket heater from the mass would be tricky to make resilient but if it could be done you could add more mass (sand) and a more powerful rocket heater that's stationary outside.
ASALAM O ALAIKUM wel hi there hey brother make a huge sand battery that we can benfit from it .. and if you make large size of water heater and use the barrel instead of drum will that help see you in a next video IN SHA ALLAH
you showed us how to heat it up but you didn't show us how take an electricity from it as an energy source but the idea and effort that you spent to do this experiment is great , keep it up ❤
You can also use a sterling engine powering a generator for electricity. Use the warm sand or hot air from the sandstore to heat up the "warm" part of the sterling engine.
Try either thermocouples to generate electricity or copper tubing to heat water and turn a turbine. These people are over complicating the whole project. For the simplest concept, just use a metal garbage can, painted matte black. See my instructions above.
5:36 i would say the best option is sector coupling a quiet known concept are serverfarms which have a high amount of excess / waste heat which can be used for heating
Great suggestion. I just crunched the numbers and got a delta t from 25C to 98C = 21 KWh which might take the edge off a single room through the winter. I am proposing using 6 barrels with 200 mm insulation board with plywood surround. Bed on top: 125 KWh - but then we will be using a water mill powered friction heater aka hydrodynamic retarder.
yes, please! I was thinking of doing it small scale at a remote household, but the Finnish company emphasized that a small-scale prototype is not as effective, as the effectiveness comes exponentially from volume, so single household solutions would not be cost effective. If a district of say, at least 10 houses would share the energy from a unit, then it would already surpass any conventional means of district heating.
It will radiate the heat. If that's too slow you pass air through it or around it for add convection. You could also pass water or glycol through it to increase the draw but the fast you pull heat out the more quickly it will be exhausted of heat.
What hot air being injected directly underneath/in the sand to cause liquefaction? To get the temperature up quicker; at higher volumes of sand, more air inlet manifolds (injection points) maybe be embedded in the sand.
I'm pretty excited with where your experiments are going, this is a great topic to be looking into right now. Have you ever thought of making a gravity battery system that could be powered by exercise?? I think a human treadmill with a flywheel could work well too, but it would take up much more space.
I would like to see how long it keeps its temperature when insulated up. To test to see if you can heat it in summer and cool it in winter. Will it hold the energy untill the cold months come for you to then get your 5h of heat?
I would like to see a calculation for physical size of a solar heated sand battery for 1000kw per month or about 12000kw yr. How much sand is needed at what temp to create that battery? I am taking a random guess at 10k to 20k kg but can anyone calculate it out?
very helpful thanks Yes would be great to have bigger version and compare metrics, also show similar version of an equivalent of normal Lithium Battery storage for size vs energy able to store for Home Scale
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. 🙏
Yes, please build a larger model of the Sand Battery. There is little practical information on this topic. I would like to build a larger battery using Solar Hot Water panels. I need more info. on this topic.
Try using a steel garbage can painted matte black, attached to a dolly then filled with DRY sand. Put this in the sunlight all day long. Wheel it into the house at sunset. It should give off heat all night. Put it outside again at sunrise. It's just a prototype, so don't expect perfection. But it should be good enough for a small house.
For people who don't know, sand has a specific heat capacity of 0.835 while water has a specific heat capacity of 4.186. What do these numbers mean? Well, it means that water take more energy to heat up than sand, so, those sand batteries that can store 600C of temperature in sand are basically the same in terms of ENERGY storage compared to a water batter that can only store water at 600C. This isn't to say that they're useless, in fact, I think these could be highly useful as energy storage when it comes to hurricanes! Hurricanes are a gigantic mass of kinetic energy that smashes cities to pieces, when it comes to harvesting the energy of a hurricane, a lot of it we wouldn't even be able to use within a week or possibly even a month, depending on how much energy we siphon off of it because of how little energy humans use in comparison. So, sand batteries will, I think, be very useful for storing the energy of a hurricane due to the fact that the sand batteries can hold energy for months, even if we use these batteries to obtain electricity rather than simply use them to retain the heat for homes. Even with the loss in efficiency of obtaining electricity from these batteries, I think it'd still be useful because, 1. we wouldn't be able to use most of the energy anyways, or at least, without a better alternative. and 2. the main benefit, in my opinion, would be absorbing the energy from a hurricane and decreasing its potential for destruction meaning fewer people would get hurt and die and less homes would be destroyed or, if we have enough turbines designed for hurricanes, completely negating the hurricane.
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I think solar vacuum tubes would be better for heating sand. They are simple, effective, and don't require expensive materials.
Keen to see an upgraded version of this. Still have concerns about duration of storing the heat. Also, are there more options to extract energy and convert into electricity? (Nice video BTW!!!)
Bigger scale. Well insulated and buried in the yard. Heat the sand with wood stove with hot water capabilities. Use sand battery to hydronically heat domestic hot water and radiant heat for the home. If you have enough sand and it’s well insulated it would be interesting to see how often you have to run the wood stove to reheat the sand.
Are there DIY plans for a concentrating solar collector to heat the battery? I do not like the concept of using PV panels and an electric heater in the battery. TOO inefficient, but a concentrating solar thermal trough or dish could produce the high temperatures to heat the sand battery. Is there a GOOD DIY plan for such a thermal concentrating collector?
Maybe try an old water heater. It is already insulated and has heating elements. Just change the thermostat to a higher temp and power it with solar panels.
The atmost important part of a chemical battery is the battery cell separator & for sand battery, it is the insulator. Good luck trying to make 'em sufficient🤯
Hello! I am planning on building a sand battery as well at home. I have a 30kW solar system, and I want to use the energy stored in the sand battery to generate electricity. Maybe you can do a video on this or we can share some thoughts for an experiment. I'm in southern Austria near the Slovenian border.
Thinking the same, i have 15kw of solar PV, self sufficient for electricity year round, so 15kw roughly here produces 14,000 kwh, consume about 4,000 kwh in electricity, the spare 10,000 could be diverted to a heat store, I was thinking off using gravel/dust its much cheaper than construction sand, sunk into a pit, only insulating the roof of the pit and cover with 1m of soil. They have done this in Denmark
@@jimbobarooney2861 intresting do you have a link to the danish experient. dosent a lot of heat get wasted? how long cycel where you planing weekly or yearly
@@matskarlsson4900 Vojens, Denmark is one, there's many in Denmark. Hard to get technical information on heat loss, many claim about 20% in heat loss, these tanks are massive so the volume to surface area ratio is in their favour, a smaller tank would have much higher heat loss if constructed the same way. I yet need to work out the heat loss and if just insulating the roof is sufficient. I'm planning to entirely space heat my home. I currently have 8kw of PV and 23kwh of lithium batteries, this provides about 90% of my electricity. I recently purchased a pallet of 36 no, 415W panels . I might now use filter stone/round drainage stone as apposed to quarry dust, the void ratio is higher (more water, will give a higher thermal mass/heat capacity per m3). The house is well insulated with underfloor heating throughout, so the lower water temp will suit.
@@matskarlsson4900 hi, I've nade an excel spread sheet the variables, length, width, depth of storage tank, specific heat capacity and PV size. Used monthly historic data for my location and estimated my space heating monthly, use some data from Denmark for heat loss, floor 0.1, sides 0.2 roof 0.15W/m2K, the net tank heating months are Apr - Sep, and to have the ability to heat the tank from 30C to 80C during this period, so its working out as follows dimension of tank 8mx8mx3m deep, 29KW of PV required, this gives the following, annual PV produced 25346kWh, annual heat loss from the tank 14784kWh and Space heating of 10000kWh. As you see there is a lot of heat loss from the tank, but it could work
@@matskarlsson4900Hi, I hope to achieve all my winter space heating of 10000 kWh. I created a spread sheet with inputs of tank dimensions, specific heat capacity (as this might change depending on a water or water/stone mix system) and PV size. Produced the following 29kW PV annual production 25346kWh, heat loss from the tank of 14784kWh and 10562kWh net heating. Tank dimension 8m x 8m x 3m deep of water/stone mix. Net heating months Apr to Sep of 8650kWh which should heat the tank from 30 to 80C. As you see there is a lot of heat loss, the overall system is doable I think. Used floor 0.1, sides 0.2 and roof 0.15W/m2K from a Danish case study
Bright, futuristic, immediately useful, सहारा and other deserts could be next energy hubs... deserts themselves could be benefitted... reducing heating of sand may make it amenable to vegetation growth, heat could be sold to neighbouring hungry Europe for building heating straightway...
Its a cool idea but it would probably be better to use solar concentration to heat the sand instead of solar panels so that you aren't losing energy changing electricity into heat
One thing to consider, just like it is inefficient to convert heat to energy, it is inneficient to convert energy to heat to store it, it is better to produce thermal energy and store it which can be done with modified renewables
An intermediate sized sand battery of several tones would be interesting. I think there are a couple of products in coming onto the market in the US. But expensive from what I gather. Probably using solar and resistive heating would be the way to go.
Wow nice video! :D We are working on it to turn the heat from the sand back to electricity. And many cases we can use the waste heat from the turbine condenser so the efficiency goes up significantly. Total efficiency can be as high as 90% for combined heat and power plant. You can also wonder why we just don't stop all the cars and condensing power plants which has similar efficiency, 20-30%? XDD
One 15 inch decorative milk can. One bag of playground sand. Either a 12 volt immersion heater that plugs into the cigarette lighter socket OR a 12 volt hot water heating element from a RV dealer. One UBS powered mini desk fan. Be sure to set that milk can on something to insulate it from the floor. One 12 volt car battery. Solar panel of sufficient wattage to charge the car battery from the drain overnight. From the solar panel to the car battery. Battery to the heating element. Mini fan to a socket UBS charger hooked to the battery (drain on the battery will be negligible). Fan to stir the heat coming off the milk can. Will sufficiently heat a 12 foot by 12 cabin over night for sleeping. And the remaining heat at the top of the can will heat an 8 in frying pan to cook your breakfast. You may even want to slightly open a window. I have one in my living room with a water heating element. And a smaller version made of a 14 inch decorative SPARK pot bellied stove with an immersion heater as my element. My power source to the two ancient car batteries hooked in parallel. My living room is 14 feet by 18 feet and the kitchen is 14 feet by 12 feet. Most days it stays around 68°F and the highs have been in the 40° range. One night the electric furnace kicked on. But it was 18° that night. The ladies at the city hall always want to know if I am freezing in here. My electric bill this past month was $36.73 😅😅😅😅😅😅😅😅😅😅
Please build a bigger one. Also, test using electric heating element vs hot water to put heat in storage and other loops to carry heat out to be used for room heating, cooking/baking, drying food for preservation, drying clothes, and distlling water for safety.
Haha would like to see how you isolate those several tons of sand :p cool idea though! I mostly wonder how you would regain the heat from the battery, or maybe even turn it in to electricity, regardless of the lower efficiency.
The surface area, where the heat loss happens, increseas slower than the volume. That's why this technique works best with large units. Sand is also poor heat conductor, so in a way it's an insulator itself.
Please make a larger sand battery that's on a dolly. You heat it up outside and then roll the dolly sand container to indoors to radiate for hours. Perhaps it can be heated with rocket mass stove using the sand as a thermal mass. Maybe the rocket mass stove is integrated with the sand on the dolly. The above dolly/sand/rocket mass would be practical tool to heat a home in an emergency or supplement a heat pump when it's less than -15C outside.
I would appreciate the bigger scale model and Watt*hour or Joules measurements. Amp*hour in case you decide to transform it into electricity. Good video
Bigger scale sand battery please 🙏 We have sand dunes increasing into land space. Pine trees were planted for wind sand buffer, now trees completely covered by sand. We are sub tropical/antarctic region and sand heating would useful for the communities 🙏
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dose sain smart do shipping to Turkey ?
@@taham6757I have checked, Yes they do !
Seviyorum seni Müslüman kardeşim 🇹🇷
I'm an engineer working with Nitinol, Ive been working on a way to power a ranch using a Nitinol engine that uses a sand battery for its needed heat exchange during the nightime hours. I dont know why anyone isnt working with this very simple and very effective technology but they should be. Its something most handy people can build and easily power their homes
Maybe make a big metal spiral (or few of them), like in electric oven, then put them inside the sand, to heat it up to at least 250-300 Celsius or much more!
Can end up requiring few kW of power (with few spirals), but looks like a decent idea to test it.
And it would be great, if you really decided to repeat the experiment with bigger container! ♥
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.
Gheez, talk about working in the right place:) Good luck. This ought to be a no brainer
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.
This would be much longer if he used any kind of insulation too.
except the method to heat it was very expensive
Heating mass is more type mass plus circulation issue than sun, solar, wood/fire source. Proportional wise.
Yeah just have the boiler surrounded with sand with the pipes running through it then if it ever goes out if you built your house with like a 2 ton sand box around the boiler it would heat for ages this concept is amazing for getti g rid of heat from servers usefully 😊
Yes, fill up your entire basement with 1000C sand! Will keep your house very warm for whole winter.
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..
I wanted to build it too, with double sheet metal enclosure with glass window on the outer enclosure and vacuum between those two metal enclosures.
Would use mirrors to direct sun energy trough that mirror to heat internal enclosure with sand inside.
There would be pipes around outer encloser and it would be well insulated.
So when you want to heat the water that you are pushing through those pipes, you just lower the vacuum between those two enclosures and the heat from inside enclosure start to heat outer one with pipes..
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
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.
An elegant, practical and resourceful solution, I think, to longer term storage solutions.
You can use water for that
They did that in the olden days with wood chips. They would bring in ice from a lake or river and put it in the persons chosen area and cover it with a pile of wood chips.
Perhaps a Tesla turbine could be the thermodynamic transformer at the center. ua-cam.com/video/FHV2sQp-KHU/v-deo.html&lc=Ugz09OHDp3e14PCn1a94AaABAg
Just because it’s called a “sand battery”, you don’t need to use sand. If you use stone chips, . (Like a big Finnish sauna heater.) You can force hot air through it over a heating element to heat it quickly, and later circulate air through it and through a heat exchanger to extract the heat. Then ideally store it all in a giant vacuum flask.
You should try using a high power electric heating element that heats the sand from inside. Great video!
It'll burn out the heater element out as the sand doesn't take heat away fast enough. You could regulate the current but... that defeats the purpose of storing the heat as you couldn't charge it very quickly. You really need some way to move the heat through the sand (that's why they use numerous tubes with fluid flow throughout the sand mass). Otherwise you end up with a really hot spot, and the rest remains cold. That's what happened with his first "heating from the bottom." There was nothing to move the heat up through the sand. Easy problem to solve with pipes and a fluid. Hard problem to solve with a "bucket of sand and copper conductor poles." But I live somewhere cold... and I would buy/make something like that if I needed to temporally shift my energy consumption dramatically.
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
Wouldn’t that make the storage less dense for heat retention? There would be more air in between, and from what I understand air cannot hold a lot of heat. Else, they should have made a tank of air instead of a tank of sand.
But I’m no scientist.
Absolutely true! Density is the stone size factor, so round pebbles not better choice, rough
Rock size provides rapid heat transfer and air circulation through lauers
8 inch concrete blocks, insert the copper tubes, then fill with sand.
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.
sand will heat up slowly and release the stored heat slowly to air. With waters higher storage capability, it's like this would drain the sand of heat much faster than air.
This tech is in use for district heating already.
I suggest you Google it and read up on it. It's a great way to store excess solar energy as heat on cold but sunny days. It's apparently pretty efficient.
take the specific heat for SiO2 hen youo can calculate how much calories you can store and extract, likewise use the specif hea of air and a well insulated house and do the reverse.
Huh. Looks like my response was censored.
No idea why.
Many countries in the EU are using this for district heating.
nice idea. Would love to see the bigger sand storage!
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?
There is are videos of this on YT. People use solar back packs and buckets for shelter and tent heating. You can put several of this in your greenhouse, they will work perfectly!
The DIYers who have tried this found that they needed to swap out the water heater for a stove coil. The water heater element was burning up without being submerged in water to cool it.
Also expanding the stove coil so that the heat dispersed better throughout the sand seemed to have better results.
dual heat it.....use the elements on bottom and use a glass panel with a flat fresnel lens on to to superheat the top......sha shaaaa.....heat!!!
Yes
I have the same arrangement with hot water. PV heats the water then heat comes out later. Plenty for a small home.
I'm planning on building a 450 kg sand battery. Planning to have it done for next winter.
Tell us how it goes please
@@jorgeacosta2815 I'll remember this comment
are you going to record it? Ireally like this idea of sand battery- I alsow atch off-grid Mike who done some prototypes and he is currently building the large one.
we would appreciate if you care to record and post them on youtube, does not need to be edited, just some crappy videos are enough 😂
@@shadowmistress999 I will record it once I'm done with collecting the sand. It's gonna take 48 hours total. I've come up with the best design possible to have the most efficiency. Now it's just a matter of building it. Still need to research more on the heating rods and the container type.
I want to experiment with this eventually off grid, the idea of using air as the transfer medium is genius, don't have to worry about freezing or boiling of water, or other liquid used. I'm thinking if designed carefully it could be used for a hydronic floor heating system. The key would be to design a heat exchanger to extract heat from it at a safe temp range to use for the floor system.
you would need a primary closed loop, high pressure heat exchanger, and a commercial heat pump as a secondary exchange
I wonder if a electrical resistor buried in the sand would do better. The resistor can be powered by solar panels directly increasing eficiency
That's how the Finish company does it.
Tried that, it works, but the problem with the electrical resistor is the short circuit protection. The heating element should not touch itself or the cage it is in. My practical thinking was to put it in clay/ceramic to be sure it can't move.
I love this brother he explained this so simple. May Allah (God) bless him to continue imparting this knowledge to humanity
A rocket mass heater design ... Instead of only burning 4 hours to get 24 hours heat you just burn it until your mass meets your temperature requirement, add insulation and then I would send it underneath greenhouse beds to keep greenhouses warm for free as well as your homestead... excellent excellent research and calculation formulas 🎉🎉and
definitely would love to see you build a bigger one brother!
So a sand battery and a slow speed underwater turbine call Wateroter gives you a 24/7 100% clean heat and power source. You only need water moving 2 to 5 miles an hour, these units can be moved if needed and won't harm fish. Made in Canada the Canadian military is replacing diesel generators in the far North with these units. By installing these units below all existing Dams most states could produce more power to sell to other states.
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.
Wow, did not think about this kind of liquids, do you have any solutions for liquids?
@@engineericly Sir, I don't really know about those types of liquid but I'm pretty sure that these type of liquids are there. I was just proposing a idea but if you research than you could find this liquids. Or if you don't find any, do the thing science is known for, that is "experiments" with different liquids.
@@engineericly I thought for a while and came to conclusion that alcohol could work. (But take everything I said/wrote with a grain of salt because I'm no expert on any of these things, I'm just proposing a idea with my knowledge from my science lesson that states that every liquids have different boiling point)
@@engineericly any alcohol should fit the bill. but i would encase a copper coil in the sand and then use car anti-freeze in the coil. use a double boiler to get water steam from the antifreeze heat.
Instead of using a liquid with a low boiling temperature, you can use a water's vacuum boiler/heat exchanger to produce steam. Vacuum boiler brings the boiling point of water significantly down
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
Now this makes the most sense to me.
there are European companies offering that on the market already. A dutch one, and a Baltic state one as far as I remember.
In new constructions, it should be built into the foundation.
Not my idea, but I think it is a possible winner. Imagine that about once a month, a lorry arrives and switches out your 'empty' tank, for one full of thermal energy. If you have a large Gas, or oil tank, it would typically be one to two cubic metres, lets say 1.5M3. This would store 2-2.5 MWh of heat, if filled with sand at 500C. Even allowing for losses (it would be very well insulated) this would keep an average home toasty for a month. Installation would be as simple, as removing your boiler and pumping the water through pipes in the sand, and connecting your hot water pipe, to where your normal boiler outlet pipe is. No new plumbing required. In Ireland it would work quite well, as our wind resources coincide with the winter, but surely it must be possible to have some huge underground warehouse, storing hundreds of thousands of tonnes of sand, which could be designed to keep its temperature for months. Ideally, storing solar from summer, to heat us in winter. I used to say 'How about it science?', but here the science is established for millennia- heating a stone in the fire and taking it to the bed area at night. Other than insulation improvements, the manufacturing and engineering are well established, so 'How about it investors?'
Make a bigger sand battery using Solar panels and heater coils please. If it can reduce the evening peak hours that will be a big save for the world. No need to run overnight.
I want to make one too. FYI I got a river near me to collect enough to build enough of them to give heat to 15 houses without the city knowing about it. I am planning on using solar panels to power them.
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 $600
Any more than R-38 and the cost of more insulation goes into greatly 'diminishing returns'.
Just fill the drum with water. Seriously. Cost is less, effort is much lower, and you don't need to store it at crazy high temperatures to take advantage of heat capacity. And you can move it around more readily. And you'd never burn out your element. Unless you need really high grade heat (above 100 C), with its very high heat capacity coefficient, water is the best BTU/$ heat transfer fluid you can buy. For a grid-scale solution, you need high grade heat and so you have to go to sand/gravel, concrete, oil or pressure vessels. But for single family residential scale? Just use water.
@@chasmarischen4459 wrong i build these all the time r60 is a needed
Scotland: Space heating 51% Heating Water 18% Cooking 4% Total domestic energy usage: 73%
Would it make sense to use fresnel lens with solar trucker to heat the sand? Thank you
I think thermal storage of one sort or another is going to be absolutely huge. When I finally get a little place of my own, it is going to be a large part of my projects. In Ireland, approx 10% of renewable energy (almost entirely wind) is curtailed. That is enough to heat thirty homes per turbine. A typical wind farm here is 100 x 3MW turbines, and naturally the NIMBYs are out in force. Imagine the energy company said that the closest 3000 homes, will get free heating, for life! (Imagine how your property value would increase, if that was part of the deal.) I think many people would then be fighting to get wind turbines in their area.
TRY THIS - put lots of copper plates,in a star pattern, from top to bottom - the plates wil rapidly take heat to all areas- also- not many people have a furnace!!! ANOTHER IDEA- use copper tube in the same way as is used in steam train boilers, put tank lengthways - you also get a larger surface area for your heater - again,use copper sheet to transmit heat along length of container.
Also- your container is in air- try digging a hole, and putting several layers of insulation around container, with a multiple layers of insulation lid- heat losses are highest at top of container,as heat travels upwards.
Look forward to your homesize one- you can also buy readymade ones....👍👍👍👍👍🤔🤔🤔
I have been thinking about combining a sand battery and a wood fired rocket stove to heat it. Any idea if that will work
I've been thinking the same thing. At this point in thinking about it I'd like a rocket heater on a dolly with the sand as mass. The large rubber tires make it easy to move outside to fire up the rocket heater to heat up the mass before night fall. Then put the rocket heater fire out and wheel it indoors to radiate the heat for hours. Even without a fan on it, it would slowly release through the night which is fine.
Separating the rocket heater from the mass would be tricky to make resilient but if it could be done you could add more mass (sand) and a more powerful rocket heater that's stationary outside.
Please make it biger :-)
And isolate it better ...
Thanks for te video
This channel will blow up. Hell, I even watched the sponsor video. That was interesting!
ASALAM O ALAIKUM wel hi there hey brother make a huge sand battery that we can benfit from it .. and if you make large size of water heater and use the barrel instead of drum will that help see you in a next video IN SHA ALLAH
you showed us how to heat it up but you didn't show us how take an electricity from it as an energy source
but the idea and effort that you spent to do this experiment is great , keep it up ❤
As said in the video, it is used as heat to warm homes and water
You can also use a sterling engine powering a generator for electricity. Use the warm sand or hot air from the sandstore to heat up the "warm" part of the sterling engine.
Try either thermocouples to generate electricity or copper tubing to heat water and turn a turbine. These people are over complicating the whole project. For the simplest concept, just use a metal garbage can, painted matte black. See my instructions above.
A full build video would have been better than the theory of a commercial company just a thought
5:36 i would say the best option is sector coupling a quiet known concept are serverfarms which have a high amount of excess / waste heat which can be used for heating
you've got balls to test this. thank you 👌 And the ads are informative. continue.
Need to try it with a 45 Gallon drum.
Great suggestion. I just crunched the numbers and got a delta t from 25C to 98C = 21 KWh which might take the edge off a single room through the winter. I am proposing using 6 barrels with 200 mm insulation board with plywood surround. Bed on top: 125 KWh - but then we will be using a water mill powered friction heater aka hydrodynamic retarder.
yes, please! I was thinking of doing it small scale at a remote household, but the Finnish company emphasized that a small-scale prototype is not as effective, as the effectiveness comes exponentially from volume, so single household solutions would not be cost effective. If a district of say, at least 10 houses would share the energy from a unit, then it would already surpass any conventional means of district heating.
Ooh this was interesting thank you
Im interested to know how to extract energy out of heated sand ..
It will radiate the heat. If that's too slow you pass air through it or around it for add convection. You could also pass water or glycol through it to increase the draw but the fast you pull heat out the more quickly it will be exhausted of heat.
Would mixing some small rocks within the bucket of sand be of any benefit to keeping the sand warmer for a longer time?
Build that battery my man!
What hot air being injected directly underneath/in the sand to cause liquefaction? To get the temperature up quicker; at higher volumes of sand, more air inlet manifolds (injection points) maybe be embedded in the sand.
Ha mayli you video great thank you
Thank you too
I'm pretty excited with where your experiments are going, this is a great topic to be looking into right now. Have you ever thought of making a gravity battery system that could be powered by exercise?? I think a human treadmill with a flywheel could work well too, but it would take up much more space.
I would like to see how long it keeps its temperature when insulated up. To test to see if you can heat it in summer and cool it in winter. Will it hold the energy untill the cold months come for you to then get your 5h of heat?
I would like to see a calculation for physical size of a solar heated sand battery for 1000kw per month or about 12000kw yr. How much sand is needed at what temp to create that battery? I am taking a random guess at 10k to 20k kg but can anyone calculate it out?
very helpful thanks
Yes would be great to have bigger version and compare metrics, also show similar version of an equivalent of normal Lithium Battery storage for size vs energy able to store for Home Scale
Would it be any good to place a bucket with sand on rocket stoves or petroleum heaters.?
Yes please - go bigger but also use an internal radiator for thermal charging/discharging. You need a large surface area.
Dear friend, Greetings from New Mexico! I very much enjoyed your presentation, and and learned much.... cheers!
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. 🙏
pls, build larger or calculate how long it will last in winter
On the right track all the very best fir an early resoundung success
Did you build the bigger version?
Thanks for the video.
I think you need to super size the experiment.
Yes, please build a larger model of the Sand Battery. There is little practical information on this topic. I would like to build a larger battery using Solar Hot Water panels. I need more info. on this topic.
Try using a steel garbage can painted matte black, attached to a dolly then filled with DRY sand. Put this in the sunlight all day long. Wheel it into the house at sunset. It should give off heat all night. Put it outside again at sunrise. It's just a prototype, so don't expect perfection. But it should be good enough for a small house.
Please go much further to test solution for interseasons storage, very good job
Can you put it under your driveway, soo all heat that leaks melt the snow?
Bravo and best of luck!
For people who don't know, sand has a specific heat capacity of 0.835 while water has a specific heat capacity of 4.186.
What do these numbers mean? Well, it means that water take more energy to heat up than sand, so, those sand batteries that can store 600C of temperature in sand are basically the same in terms of ENERGY storage compared to a water batter that can only store water at 600C.
This isn't to say that they're useless, in fact, I think these could be highly useful as energy storage when it comes to hurricanes!
Hurricanes are a gigantic mass of kinetic energy that smashes cities to pieces, when it comes to harvesting the energy of a hurricane, a lot of it we wouldn't even be able to use within a week or possibly even a month, depending on how much energy we siphon off of it because of how little energy humans use in comparison.
So, sand batteries will, I think, be very useful for storing the energy of a hurricane due to the fact that the sand batteries can hold energy for months, even if we use these batteries to obtain electricity rather than simply use them to retain the heat for homes.
Even with the loss in efficiency of obtaining electricity from these batteries, I think it'd still be useful because, 1. we wouldn't be able to use most of the energy anyways, or at least, without a better alternative. and 2. the main benefit, in my opinion, would be absorbing the energy from a hurricane and decreasing its potential for destruction meaning fewer people would get hurt and die and less homes would be destroyed or, if we have enough turbines designed for hurricanes, completely negating the hurricane.
I think solar vacuum tubes would be better for heating sand. They are simple, effective, and don't require expensive materials.
Keen to see an upgraded version of this. Still have concerns about duration of storing the heat. Also, are there more options to extract energy and convert into electricity? (Nice video BTW!!!)
Please find a creative way to create sand battery at home to heating one room and water.
Bigger scale. Well insulated and buried in the yard. Heat the sand with wood stove with hot water capabilities. Use sand battery to hydronically heat domestic hot water and radiant heat for the home. If you have enough sand and it’s well insulated it would be interesting to see how often you have to run the wood stove to reheat the sand.
Just heat a pile of water... Keep it under 100 C and you don't need a pressure vessel.
What if you heated the sand with the same technique used to make a fluidized bed?
Several ton build. Yes I'd like to see that video
Are there DIY plans for a concentrating solar collector to heat the battery?
I do not like the concept of using PV panels and an electric heater in the battery. TOO inefficient, but a concentrating solar thermal trough or dish could produce the high temperatures to heat the sand battery.
Is there a GOOD DIY plan for such a thermal concentrating collector?
Maybe try an old water heater. It is already insulated and has heating elements. Just change the thermostat to a higher temp and power it with solar panels.
You can also use the sand battery in combination: thermal energy and gravitational energy.
The atmost important part of a chemical battery is the battery cell separator & for sand battery, it is the insulator. Good luck trying to make 'em sufficient🤯
Hello! I am planning on building a sand battery as well at home. I have a 30kW solar system, and I want to use the energy stored in the sand battery to generate electricity. Maybe you can do a video on this or we can share some thoughts for an experiment. I'm in southern Austria near the Slovenian border.
Thinking the same, i have 15kw of solar PV, self sufficient for electricity year round, so 15kw roughly here produces 14,000 kwh, consume about 4,000 kwh in electricity, the spare 10,000 could be diverted to a heat store, I was thinking off using gravel/dust its much cheaper than construction sand, sunk into a pit, only insulating the roof of the pit and cover with 1m of soil. They have done this in Denmark
@@jimbobarooney2861 intresting do you have a link to the danish experient. dosent a lot of heat get wasted? how long cycel where you planing weekly or yearly
@@matskarlsson4900 Vojens, Denmark is one, there's many in Denmark. Hard to get technical information on heat loss, many claim about 20% in heat loss, these tanks are massive so the volume to surface area ratio is in their favour, a smaller tank would have much higher heat loss if constructed the same way. I yet need to work out the heat loss and if just insulating the roof is sufficient. I'm planning to entirely space heat my home. I currently have 8kw of PV and 23kwh of lithium batteries, this provides about 90% of my electricity. I recently purchased a pallet of 36 no, 415W panels . I might now use filter stone/round drainage stone as apposed to quarry dust, the void ratio is higher (more water, will give a higher thermal mass/heat capacity per m3). The house is well insulated with underfloor heating throughout, so the lower water temp will suit.
@@matskarlsson4900 hi, I've nade an excel spread sheet the variables, length, width, depth of storage tank, specific heat capacity and PV size. Used monthly historic data for my location and estimated my space heating monthly, use some data from Denmark for heat loss, floor 0.1, sides 0.2 roof 0.15W/m2K, the net tank heating months are Apr - Sep, and to have the ability to heat the tank from 30C to 80C during this period, so its working out as follows dimension of tank 8mx8mx3m deep, 29KW of PV required, this gives the following, annual PV produced 25346kWh, annual heat loss from the tank 14784kWh and Space heating of 10000kWh. As you see there is a lot of heat loss from the tank, but it could work
@@matskarlsson4900Hi, I hope to achieve all my winter space heating of 10000 kWh. I created a spread sheet with inputs of tank dimensions, specific heat capacity (as this might change depending on a water or water/stone mix system) and PV size. Produced the following 29kW PV annual production 25346kWh, heat loss from the tank of 14784kWh and 10562kWh net heating. Tank dimension 8m x 8m x 3m deep of water/stone mix. Net heating months Apr to Sep of 8650kWh which should heat the tank from 30 to 80C. As you see there is a lot of heat loss, the overall system is doable I think. Used floor 0.1, sides 0.2 and roof 0.15W/m2K from a Danish case study
Bright, futuristic, immediately useful, सहारा and other deserts could be next energy hubs... deserts themselves could be benefitted... reducing heating of sand may make it amenable to vegetation growth, heat could be sold to neighbouring hungry Europe for building heating straightway...
That mini pc looks awesome is gangsta man and also the video is awesome thermal energy storage is amazing
Actually, Japaneses had used heated stone to cook for a long time, same principle. Today, they use thermo pots.
Its a cool idea but it would probably be better to use solar concentration to heat the sand instead of solar panels so that you aren't losing energy changing electricity into heat
is there no solution to convert the thermal energy into electrical energy find a solution for this
thank you
One thing to consider, just like it is inefficient to convert heat to energy, it is inneficient to convert energy to heat to store it, it is better to produce thermal energy and store it which can be done with modified renewables
Did you not watch the full video
i want to see a giant diy sand battery, i hope you can do it.
Please do a bigger build, this really interesting
Very nice work, indeed! Congratulations from Portugal.😀
Omad nasib qilsa 1mln boʻlasiz
An intermediate sized sand battery of several tones would be interesting. I think there are a couple of products in coming onto the market in the US. But expensive from what I gather. Probably using solar and resistive heating would be the way to go.
I want to see him build a massive sand battery
Wow nice video! :D We are working on it to turn the heat from the sand back to electricity. And many cases we can use the waste heat from the turbine condenser so the efficiency goes up significantly. Total efficiency can be as high as 90% for combined heat and power plant.
You can also wonder why we just don't stop all the cars and condensing power plants which has similar efficiency, 20-30%? XDD
yes please do bigger test and better options for diy to do this setup at home to utlize design
One 15 inch decorative milk can. One bag of playground sand. Either a 12 volt immersion heater that plugs into the cigarette lighter socket OR a 12 volt hot water heating element from a RV dealer. One UBS powered mini desk fan. Be sure to set that milk can on something to insulate it from the floor. One 12 volt car battery. Solar panel of sufficient wattage to charge the car battery from the drain overnight. From the solar panel to the car battery. Battery to the heating element. Mini fan to a socket UBS charger hooked to the battery (drain on the battery will be negligible). Fan to stir the heat coming off the milk can.
Will sufficiently heat a 12 foot by 12 cabin over night for sleeping. And the remaining heat at the top of the can will heat an 8 in frying pan to cook your breakfast.
You may even want to slightly open a window.
I have one in my living room with a water heating element. And a smaller version made of a 14 inch decorative SPARK pot bellied stove with an immersion heater as my element. My power source to the two ancient car batteries hooked in parallel. My living room is 14 feet by 18 feet and the kitchen is 14 feet by 12 feet.
Most days it stays around 68°F and the highs have been in the 40° range. One night the electric furnace kicked on. But it was 18° that night.
The ladies at the city hall always want to know if I am freezing in here.
My electric bill this past month was $36.73
😅😅😅😅😅😅😅😅😅😅
Oh, and the cat goes outside to cool off
water heating elements are bad for it- you need it from stove or water boiler.
How do you generate electricity from the hot sand?
Ever heard something of tiled stove ? It uses the same method since 1767 ...
Please build a bigger one. Also, test using electric heating element vs hot water to put heat in storage and other loops to carry heat out to be used for room heating, cooking/baking, drying food for preservation, drying clothes, and distlling water for safety.
Haha would like to see how you isolate those several tons of sand :p cool idea though! I mostly wonder how you would regain the heat from the battery, or maybe even turn it in to electricity, regardless of the lower efficiency.
can make steam....steam turbine etc etc
Stirling motor.
The surface area, where the heat loss happens, increseas slower than the volume. That's why this technique works best with large units. Sand is also poor heat conductor, so in a way it's an insulator itself.
Good job bro👍👍👍
Please make a larger sand battery that's on a dolly. You heat it up outside and then roll the dolly sand container to indoors to radiate for hours.
Perhaps it can be heated with rocket mass stove using the sand as a thermal mass. Maybe the rocket mass stove is integrated with the sand on the dolly.
The above dolly/sand/rocket mass would be practical tool to heat a home in an emergency or supplement a heat pump when it's less than -15C outside.
I would appreciate the bigger scale model and Watt*hour or Joules measurements. Amp*hour in case you decide to transform it into electricity. Good video
Bigger scale sand battery please 🙏
We have sand dunes increasing into land space. Pine trees were planted for wind sand buffer, now trees completely covered by sand. We are sub tropical/antarctic region and sand heating would useful for the communities 🙏
A bigger battery experiment will be interesting
Try using molten lead as the conductor, or mercury, instead of air. Make the spiral tubing and checkout the tubes/kg of sand.
Why not use gold as the heat storage medium, while we're making expensive changes? 😉
Its not clear you used the battery to actually heat your house. Could you post how much hotter it made (one room of) your house?
Im curios can it use a heatpump? In summer AC would suck out the heat from the house and transfer it into the sand? 🤔
I wish that was possible
@DanielGonzalez-d7n I mean it just blow hot air through the sand