Diesel Heater and Sand Battery Store Heat Energy Storage Experiment Off Grid Living Power Source
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- เผยแพร่เมื่อ 13 พ.ย. 2023
- Store Heat Energy in Sand. This heat would have been wasted. Off Grid Life. PLEASE COMMENT, HOW CAN WE TAKE THIS FURTHER?
PUMPING HOT AIR INTO MY HOME
I bought one of these for my garage, and then thought....... I could heat my home with this! So that's exactly what i did! It is working great pumping hot air into my home. It is keeping us nice and warm and super economical.
I have a carbon monoxide detector just in case, but you don't get any fumes indoors at all
.
I hope this may help you in some way. Even if it just makes an idea pop up in your head, of how you can heat your home in cheaper way.
Thanks for looking at my videos cheers Andy..... If you can be anything, be Kind.....
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Raise the heater off the ground so any condensation runs out of the exhaust and garage. If you coil or use too much exhaust pipe it could create a back pressure issue. Good luck.
Thanks for the tips!
Try this:
Get a metal barrel, insert exhaust through hole in the bottom, coil pipe loosely in the barrel, you'll need as much pipe as you can afford and that will fit in the barrel, exit pipe at the top and then out through the wail.
Fill the barrel with your sand trying to space the coils evenly as you do that. Pack the sand down as hard as possible. Ideally you want as little air in the sand as possible.
The intention is to extract all the heat from the exhaust before it leaves the barrel. Not possible, I agree, but the more heat extracted the higher the efficiency.
The bigger the barrel (think oil drum) the longer it will take to heat up, but the longer it will radiate heat after the heater is shut down. It will also be a lot more expensive. Smaller barrels are easy to obtain, will heat up and cool down faster and be cheaper.
If you get a barrel with a lid they you can keep your mug of tea hot on the top.
that sound a really good idea, and i like the tea idea too.
cheers andy
You need to be careful of how much back pressure you create extending and turning the exhaust. Too much could create combustion and soot build-up issues making it more of a problem.
I think sand barrelling the hot air output is ok provided the duct diameter and curves are wide enough… Sand barrelling the exhaust with a coil shape would put too much back pressure on the exhaust, so a straight slight downwards tilt (for the condensate) sand battery like this is better. The manufacturers provide a maximum recommended exhaust length, so you could basically have this length indoors in a straight battery along the wall.
basic calculations. You can use Bing on the balanced setting to save time, but experiments are fun too.
It should work well enough, possibly needs insulating from the ground & a brick box around it to contain the sand & heat. Multiple coils through the sand would help distribute the heat more efficiently. I think for the cost of doing it verse the heat it would output an enclosure for the heater would be cheaper though.
true, good point cheers andy
Brilliant I saw your short.
The thing to remenber is that if if your exhaust is outside is hot then that is heat you could be usung elsewhere.
If you had a small barrel and coiled down copper pipe and then out you'd take up more heat in the sand and remember much better that water as your sand can get to way past 300 degrees c water only 100..
Plus do not forget that floor of yours was soaking up heat from the sand and acting as a heat sink as well. I have a 100 litre copper immersion tank I want to convert..
The questions always is hwo do you get the heat out and fins of some tubes through the barrel would work, but of course needs more work to do.
great , cheers.
yes, we need to scavenge all of the heat from the exhaust before it goes outside.
good comms
I recon you need to get exhaust in contact with some liquid for better and quicker heat transfer, water will boil too quick and expand/ steam so maybe using some cooling liquid/ antifreeze or even something with higher boiling point and then that liquid can connect with some kind of radiator, maybe cast iron as it will keep heat and give heat for longer.
yes, cast iron rad sounds good, i will look for one
cheers andy
Add a boiler to the exhaust as a heat source for the boiler and fill it with distilled water. Then pipe the steam generated and run a steam engine coupled to a generator. 😅😅😅
great idea
Cooling down the exhaust pipe too much will cause condensation in the exhaust pipe and could damage the heater or worse. Not recommended to have a long run of exhaust pipe with those heaters.
thats true
@@andyfireblade Look at wood stove heat exchangers for ideas.
@@solarcabin thank you xxxx
lol now it looks like rats have tunneled up through your slab
hhahaahha cheers andy
its a good idea, a straight pipe not going to exchange heat unless you use a very long length, for a a passive system without a medium use, a few rows of E-75, 3/4" Baseboard Element -2' Length, make sure you account for the condensation as you cool exhaust, slant it going down or exhaust down, so mount the heater on top, then exhaust down threw a few rows of Baseboard Element, then before condensation can happen exhaust out of shop, this a medium free passive rad design
Sand is a great insulator, at the beach the top layer in summer burns your feet but under the top layer its much much cooler.
Interesting!
you could also get a Water to Air Heat Exchanger
Dimplex radiator bricks packed with a small layer of sand
good idea thanks andy
You've got a a start but you've only slowed the existing heat radiation into the room. You need to increase the surface area for any real effect. Like the radiator idea. A long coil of that exhaust tubing inside a metal barrel of sand as a thermal mass.
yes, that sound a really good idea
cheers andy thanks
I would do some dry snack block to build up a wall nice and thick, to make a bench seat. Move the diesel heater down the wall to bring more of the pipe inside and do a straight run out utilizing that sand and maybe bring the pipe into a larger size to slow the movement and allow more time for heat transfer. Once it exits, then have a gradual turn up at least a foot and a half, 40cm ish..
Cap your sand with some pavers.
I like the idea of a bench seat, bricks or breeze blocks and could use the sand to fill the voids. That way you get an entire block of solid matter that will retain the heat.
great idea, thanks andy
Basically a rocket mass heater without the rocket stove
Try placing a cast iron pan on coiled pipe with the sand insulating exposed exhaust pipe. Thermo fans for wood stoves could work if it can get hot enough.
sound good , cheers andy
The problem you face here is while you are heating up the sand you aren't getting heat into the shop from the exhaust until the sand warms up. If the sand wasn't there the contents of the room will heat up including the walls faster. You have to ask yourself how long does it take to make a video in the garage and if the residual heat from the sand makes enough difference to warrant making a column of sand over the exhaust or will the walls etc retain enough heat without the sand. I would just use a long exhaust around the skirting of the garage, long enough so the end of the exhaust is cool enough to touch. That way you are extracting as much heat that would otherwise warm up outside. and turn the burner off for making videos.
good comment cheers andy
The heat for the shop comes from the vent on the front of the unit. Look at the thumbnail for this video and you will see the poster has added fake flames to show where the primary heat exhaust is. The exhaust pipe is residual heat from burning the fuel. Using sand to reclaim some of the exhaust heat does not diminish the hot air coming out of the round vent on the heater. I had a similar heater on my 18 wheeler. It was about the size of a shoebox and contained a small turbine engine that burned diesel fuel. The exhaust from the turbine heated one side of a heat exchanger while a fan blew air through the other side which vented into the sleeper berth in the back of my tractor. The burnt exhaust exited via a pipe to the outside of my truck.
Not quite right, that's the exhaust and as the video shows his exhaust is too hot to touch outside, so it's wasted heat. The point of a radiator (a sand battery is a radiator) is to scavenge heat and redistribute in an even way.
Sand is brilliant at this.. Just need to work out how long the average run time is and then work out the volume of the sand battery
If andy spends 8 hrs in the garage then running the heater for 3 hrs coudl very well heat the sand battery so that it will provide the heat for the next 4 or so.. Testing will tell more.
The point is the exhaust should only be 20 odd degrees by the time it exits the garage ;)
What about those bricks they put in ovens under the sand those bricks hold on to heat
thats a good idea, cheers andy
I floor heating ? Possibly something to look into? Keeps garage floors heated up…. Be curious if someone checks it out. I have in-floor heating but hasn’t been hooked up yet. B Deacon Manitoba CANADA 🇨🇦
thats a really good idea. cheers andy
Don't do that, sand is a heat isulator and you are loosing more energy that way. If you want to store energy, intall a long aluminium flexible pipe in the heater output and run it through a lot of sand
The thing is though, sand is such a good insulator because of the air between the grains, so it takes a long time to heat through, however, being as air itself is an excellent insulator it also takes time to release the the retained heat so stays warm longer than say aluminium.
@@Moonlightshadow-lq4frAir is a good insulator when it is not moving. When heated, air moves (convection), so it is no longer a good insulator.
Ever thought that the thing would have a top to it? @@benetra
@@Moonlightshadow-lq4fr it is not only the air pockets, the heat transfer between sand particles is very bad too. A rock is much better, water is much better, cob and cement are very good
Might want to try something with water or maybe even an oil filled radiator. You would have to figure out a way to transfer the heat from the exhaust pipe to the radiator. I will be trying something soon for myself since I have a diesel heater and want to get a second one to supplement heat in my house.
Thanks for the tip, i have done a few other experiments with the heater and a radiator.
please take a look at my other vids, by clicking on my user name andyfireblade
cheers andy
nice bike
@@andyfireblade I'm already a subscriber. I checked out some of your older videos too. I first saw your videos from last year.
@@kevin34ct thank you
Theres nothing wrong with your experiment. Im envisioning an earth stove where you utilize the initial heat from the unit for 6 hours and then maybe have 6 hours of latent heat in a sand battery... obviously not this one but it was a test. Maybe a larger diameter pipe which would reduce back pressure and tou could make a battery 30 feet ir more long. Winding and what have you. IF you utilize most if the exhaust heat it could save you a ton of fuel.
brilliant!!!! thats just the kind of comment we want. this gives me and others some great ideas. thanks andy
thanks
skip the sand... attach a copper pipe that make some loop in a ibc water tank.... : sand dont do convection , water does (mean pipe always colled by fresh water cuz hot one rise (put the coil at the botom of the water jug)), sand lose vs water at energy storage for mass unit, and with water that stored head can either be used in place by dissipation of the tank, or actively with car radiator if u need more heat...
great com, thanks my friend
cheers andy