Sand Battery Radiant Air Heater (with opt. heat powered fan) DIY - low wattage element - on/off grid
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- Опубліковано 20 січ 2024
- experimental 'sand storage' air heating system. the sand (or sand battery) is heated using a DC powered stainless steel heating element. once heated, the sand 'stores and releases' its heat for hours. the heat powered stove fan is optional (but it helps move the heat around). just set it on the hot sand and it runs. only use a very low wattage element. (the standard and higher wattage ones can burn out if not used in water). element used is 12v 150 watts. unit can be run on 12v solar panels or 12v battery (off grid) if desired.
song in video is titled 'drop the tapes' from yt's music library. - Наука та технологія
Thank you!!! I use the sand battery with the small ceramic elements and it heats my home really!! 0° C and below outside, in my home (a big stidio) is 16-17 inside just with that. 6 pieces in a pot full of sand. Thank you so much ❤
6 elements??
I would use a metal bar to mount the heating element and drop it into the can. And wire it to a battery bank with solar and add a temperature controlled relay to turn the element on and off automatically . Cool build i am going to build one .
I was thinking similar. I would like to see heating element built into the can and then powered by PV panel. What an amazing way to get ‘free’ heat!
@mrbizi5652 I was just about to suggest the same thing. Leave the battery out, use only a solar panel. I would use a larger residential panel generating 40 to 50 volts open voltage and then use a dc heating element with a rating of 48vdc
There was some guy here in Europe made something similar to your idea except he used a giant boiler and he basically put a lot of sand in it and copper pipe and I think five heating elements inside spaced out and he basically used it to heat up his home the entire winter he filled the copper pipe with some kind of fluid and basically ran it to the radiators around the house
Makes a nice space heater! Could set it outside with a small solar panel for the day, then bring it in at night to warm the room. Thank you. Great idea for those of us that have no power, and small solar.
I always look forward to seeing your videos & thank you do it sharing😊
thank you 😎
I'm totally going to build one of these! How long did the sand take to heat up? Thank you for the video!
Thanx. Always good information.
hi and thank you!
How about putting water in the sand to protect the element?
Another great video.
Thanks
hey @desertsun02 - any ideas on how to combine the radiant heat generation method with a humidifier effect? I don't like current off the shelf methods.
Water can hold a lot more heat than just about anything. I wonder if there's a way to automatically heat water up to 200F, cut off and then kick heating back on when it reaches 170F. Of course, a guy might need a 5 gallon bucket. You'd get the radiant heat and some much needed moisture in cold winter months. There's a passive plug that cuts power when it reaches x degrees but I forgot what they're called. Might be a simple start at least.
Thoughts?
i wonder if you could use something like this for cooking if you just make it large and hot enough. 🤔
I had an idea with respect to sand batteries. Inspired by larger industrial applications, one might add an air-pump as a bubbler to fluidize the Sand Bed and release more heat to be distributed by a circulation fan. Evacuated tubes might be used instead of photovoltaic panels.
A 45 Watt T.E.G might be enough to power the air-pump when sufficient heat is captured, thus automating the process.
An automated solar thermal-mass furnace.
Never subbed so fast ! Knew i was collecting old cast iron dutch ovens for , ' something ' ! Live in a 450 yr old , fridge , so thank you
That's how I was when I watched my first sand heater video he did. New Subscriber ✅
I see the sand stays hot for long time. I figure it could be used on chest or body to stay warm during outdoor winter if it is wrapped in something safe. We dont want something blazing hot just warm enough and last long time. I hope that makes sense.
So you are using a Peltier module to power the fan by using the hot sand to heat the module? I mean it’s cool but it doesn’t last that long and you will have to keep heating the sand with electricity or a fire 🔥 etc….
Very good idea , thanks for sharing YAH bless !
Ok heres my thing , how low can it go on voltage and amps to heat up to 200 Fahrenheit , to be eco friendly and how long to heat it up
thnx for the video, what kinda sand is this?
hi. it's what's called 'play sand'. often used in sandboxes. it's a sand that has been washed and filtered.
Mount the heating element in the bottom of the can, it's going to be setting on the blocks anyway. Then you can set your fan on the sand and not have to pull the element out every time you charge the battery up. Just sayin.👍
I'd love to know how long that sand holds enough heat to power the fan. As for the heating element, could it last the winter before it burns out?
hi. i haven't done specific time tests but the fan could potentially run for several hours. i know that the more powerful elements don't last long if used without water but my thought is that a very low power element (like the one i used) might last a while. if any water heating element would work it would be this one. (lowest power 'full size' one that you can buy). i'm hoping it will last a couple of years at least.
Thank you! Still to much Watt for a total off grid. A sand stove takes about 14 hrs 150Watt, what do you think? 👍🌻❤️
I think a 1200-watt array and a 1410ah 12v battery bank would work great for one of these
@@donaldsteele6276 Thank you!
I can imagine, make this with the 200Wp solar panel, like outside. Make iron "cube", put inside sand, heater element and outside the cube stick the thermoelectric pads. So in the day you can collect heat inside the sand from solar panel and during night taking electricity back with bunch off TEC1 pads
I love your videos. Can you please place the link for the 12 power supply? Thank you!
hi and thank you! here is a link to a similar one www.amazon.com/SHNITPWR-Switching-Converter-Transformer-Security/dp/B07TZMMZ66/ref=sr_1_12_sspa?crid=6IWSAOF52KGR&dib=eyJ2IjoiMSJ9.3NqJ0oW-fhYU0_zvO1_8ABK443w3-vwmVH66VxlnvZLYt5dTd6LuXK5Bz-zy5acTlS-XNg4cn4z5SrY1Gx_nJP497dxh5ewH-h0BnqBVyent1pnVL-3y_37bu7oizPvjJN6OVFw3H5FbQnEVUG0QqEN5yVNeJDD2_LAK1YEcQox7V_sRfi3XwlPd9DfsP6cXsJZ7tOKnkIOmc9p4Rzrr7HGXxv4wea5CObyo8nncd5o.osIcapz7jRazVg_IaT6V-Ag_qEwWhTwkm4IRrVPumMc&dib_tag=se&keywords=12v%2Bswitching%2Bpower%2Bsupply&qid=1708609619&sprefix=12v%2Bswitching%2Bpower%2Bsupply%2Caps%2C285&sr=8-12-spons&sp_csd=d2lkZ2V0TmFtZT1zcF9tdGY&th=1 i couldn't find the exact one i used (night be out of stock)
Thank you so much! what is the size, 60w?
Brilliant! Wondering how long the sand was putting out heat after removing heating element? Thx👍
hi. last temp reading i took was about 3.5 hours in and it was still reading 188F(87C).
@@desertsun02 amazing!
Is a Mass Storage Heater now to be called a sand battery?
I would avoid water heating units , because those are made out of copper pipe (and than nickle plated , or chromed). Steel is much more resilient (heating units , like on the electric stove , or barbecue ). There are , also , ceramic heating units (still very cheap) which are extremely durable. I just don't understand , why no one (that I saw on YT) installs heating unit on the bottom of the sand container (heat travels up) and thus prolonging life of the power wires . Also , no one bothered to construct a magnetic induction heating unit , within sand battery (still very cheap and extremely energy efficient) , or to make heating unit DIY (which is incredibly easy , with some calculations) by using heating wire of certain required resistance (for the unit that someone wants to make) and , for an example , ceramic tiles (there are ceramic elements for that purpose , available for purchase - very inexpensive ). Of course , construction (design) of particular sand battery depends of many things , including purpose , availability of materials , skills and knowledge of person that builds it , etc...
However , in my mind , the main advantage of the sand battery (besides relatively low cost) is it's capability to store very high temperatures , which can be exploited (used) as needed , trough prolonged periods of time (there is a challenge of constructing proper heat exchange , with some control of heat output). Seems to me , that everybody on YT make those things to raise the temperature in a small room (in some cases - small greenhouses) and for one day at a time.
Add a solar panel and pop in your greenhouse voila
would there be any benefit to using wet sand vs dry sand ( just damp...not saturated with water )
So I'm not really understanding the benefit of using sand instead of water as a thermal battery. Is it because its easier to use?
Design idea:
Why not use a metal pot with a flat lid and fill with water. Heat with element. Can put the metal pot inside a bigger metal pot with perlite to insulate and increase temps.
Water boils at 100*C. Sand goes to over 500*C. Sand also stores the heat much better than water.
Your design idea is basically a well insulated kettle.
I'm new to this so I'm a little confused. What function does the power supply you showed serve? Also, it looked unplugged so please reply so I can figure this out and build one. Thanks.
I think he used a 12V power supply merely to demonstrate the function of the heater for the purpose of getting temperature readings.
His Show Notes describe the use of PV panels (rated at 12 V) so any source will do such as a suitable lead-acid battery.
Nicrome wire is the appropriate heating element material
i have thought about using that but you gotta be really careful with that stuff.
So how did the element hold up?
hi. so far so good. i guessed it might work because it's a very low wattage element. so lower temp than the high wattage ones.
Have you tried black sand yet ?
hi. i haven't tried black sand yet.
Pour water in the sand you have a humidifier.
If only it could power that hoover 🤔
lets say 5kg of sand, 200C, 50C is too cool to really heat the room
thats Q=(5kg)×(0.00084J/kg°C)×(200°C−50°C)
.63 kJ of energy
To run a oil heater at full blast for 2 hours is like 2kWh,
7200 kJ
That's not going to heat a room for long man
Everybody will appreciate this later.. but by then it would be too late. Because they wont be able to watch the videos.