I will fill you in as we go along. Wow...this was a pretty cool version of these types of fans... i actually made one a couple years ago but my stove gets so hot it melted the plastic parts in the motor... lol but it worked pretty nicely for the ten or 15 minutes that it did work... lol, Reply Go to the hardware store and start playing around, seeing what you can make. Repositioning the fan so that it cools more of the fins, or putting a shroud around it so that it draws primarily through the spaces between the fins may help. The peltier units also have various voltage and amp output voltages and might need more or less of them for required power for want ever motor fan running.. Might need to also find a voltage regulator of some sort, or might burn out the motors.. What ever peltier unit needed They appear Cheap to buy and relative to cost of buying something prebuilt,... and it easy to build one using the same principles described here.. One video that inspired me in my design was this one: https://www.youtube.com/watch?v=1u7POtVxtMI. Great Savings & Free Delivery / Collection on many items (6) 6 product ratings - EcoFlow Heat Powered Stove/log Wood Coal Burner Fan new for 2020 Flue Pipe Fan make the heat power transfer unit to power a computer cooling fan.. many are 5-12v. So, if you're more patient, these can be sourced through ebay from chinese vendors for under $15. This would be the point where you would want to spread heat conductive paste between the mating surfaces of peltier and the different heat sinks, to help with heat transfer. Happy making, Hulkbuild out. The hot side is the one that should go against the I-beam. First, we start with the base, which for me is the I-beam. However, they don't adapt small enough to thread into the spark plug hole on the engine block. After the first run, I could touch the top of the heatsink and only felt that it was slightly warm. Solder the wires of the motor to the ones of the peltier. I already had the base heat sink for that project sitting around, so now I just ordered the top heat sink, motor, and peltier chip. And using a salvaged propeller from one of my rc aeroplanes, I managed to push fit it into the Radio Shack motor. The side that gets hot is the hot side. To mount the fan blade on the motor, I first tried punching a hole in the middle and forcing it onto the end of the motor shaft. The drawback is that heat will be conducted through the bolts, and this will hurt efficiency. Currently, the best heat powered stove fan is the Ecofan UltrAir. You can see it in the last picture. Choose one, then simply print it out, cut it out, and lay it on another larger piece of paper (my full size pattern won't fit on an 8.5 by 11 inch sheet) or the sheet metal that your fan blade will be made out of. Did you ever find a solution that worked to distribute the heat? Ebay or any computer component sales, but watch out for the prices, as some are quite expensive! It's got a couple of new features the old one didn't like overheat protection. no i just basically gave up and moved on...lol i dont think i could make one that wouldnt melt..unless the motor is all steel with no plastic in or on it at all. Dielectric grease, white type is similar to what auto manufacturers use in ignition distributors and is easier to find than heat type grease and supposedly works near the same available at most auto parts stores or anywhere that sells hardware. The last thing you want after rushing home from work to gather wood, chop kindling, and get the fire started before the house freezes over, is to shiver all night while it heats up. If you stay within certain guidelines, there is a lot of wiggle room as far as design and materials are concerned. However, many of the parts can be obtained free. 55 Get â¦ They're used a lot by people who heat just by wood stoves. The brass parts in the previous step accomplished a lot, namely making a 90 degree turn and adapting up to the size of the motor. Looking forward to building this and maybe adding some steampunk decoration. Absolutely, I will give it a vote as soon as it gets accepted into the contest. If weren't trashed because something in them stopped working. http://www.ebay.com/itm/201229071773?ssPageName=ST...http://www.ebay.com/itm/391100073661?ssPageName=ST...http://www.ebay.com/itm/131668463520?ssPageName=ST... That is what I would have tried for my first attempt, but there are probably better options. 524 â 4 Blade Mini Heat Powered Stove Fan The 524 heat powered mini stove fan is the smallest fan we offer; at a height of just 125mm and width of 100mm. Half way up the base is a peltier cooler. These step-by-step instructions show how to install a solar-powered fan that's low maintenance. WIthout this it would have made it a whole lot harder to mount. I am guessing you watched my youtube video https://goo.gl/PwNwhr or read my blog post here http://www.floweringelbow.org/2018/wood-stove/maki... on the subject of making a stove top fan like this from an old chainsaw cylinder using a brass elbow. It may help me improve my design. So I bought an EcoFan for a friend and decided that it was a cool concept and built one from scratch. No because the Peltier module generates DC. Great Idea!You can salvage high temperature cables from an old Iron and crimp them to the cables close to the Peltier Element - do not solder! 5. To achieve this, we have to hold one side of the peltier plate at a high temperature, and the other side at a lower temperature. You can finish by attaching any heat sinks you want to the engine block. If you are new to instructables, you should know that you can click on pictures to make them larger. Okay, so lets jump to assembly. The fan acts like a large heat sink, drawing heat from the stove up through the aluminium base. Thanks dude! eco fan for log burner 110 $0.68 1 diy heat powered wood stove fan 90 $0.85 0.96 heat powered fan diy 90 $0.08 0.87 wood stove fan diy 90 $0.29 0.93 wood stove blower vs no blower 90 $0.69 0.99 â¦ The fan blade could still wobble on the shaft. To achieve this, we have to hold one side of the peltier plate at a high temperature, and the other side at a lower temperature. Nicely done on the motor mount!I think your fan needs to be more in the middle of the heatsink, as it is, likely drawing most of its air from above the heatsink, where there is less resistance. I suppose you could also tap the holes and bolt it right on, but I wanted to keep it simple to build. An attic fan can help reduce heat inside a home and overall cooling costs. Nice. In this instructable, I will show you how to make a heat-powered fan. As we discussed, one side of the peltier plate has to be held at a high temperature. Put replacing on long finger and then recently seen these commercial ones for 24 euro. I have never heard of a stove fan before, is it to blow hot air around? 11 months ago. Maybe lithium grease would work! Building Giant Articulated Hands (carved From Wood for Social Distancing), https://www.instructables.com/id/Improved-Stove-Top-Fan-from-Junk/. I donât have any, but you could either try to scrape some off of old CPUs or you could just buy some off eBay. That way, As heat makes its way from the hot side to the cooler side, it passes through the peltier plate, generating a small current. Now, feed the little bolts through the holes and tighten them down. However for the couple hours it worked it really helped spread the heat evenly through the house and looked like that might reduce the amount of wood I needed burn. Would it work if I do as he does, use a ac electric motor? This conversion from heat to electricity is performed by a peltier plate (the white square thing with the wires sticking out of it, see picture above), which can be purchased on eBay for about $2. Place the fan on top of the ceramic bushings so that the holes line up with the bushings and the holes. I should mention that I drilled three holes through the brass and tapped them with threads so that I could thread little #4 bolts through them to tighten down on the motor. I cleaned up the top part nicely, then set the chainsaw engine block on top of it. The wires of the peltier get hot, and the insulation gets soft. This peltier cooler is used in cooling cpus to â¦ 6 years ago Got a hobby motor for $3. If so (and I haven't seen the idea anywhere else on the net), how about showing me some love with a link in your 'able? I don't love how this part ended up, as plastic isn't a good choice around so much heat, but it is working for now. All in all, about a couple hours of work! The heatsink also does two things, one is that it raises up the height, and second is to reduce the temperature getting to the peltier module (because I wasn't sure how well it could dissipate the heat) But when placed on the stove I guess I am losing the temp difference. Do you remember them,,,,,I had no temp control so used to move it to rear of stove, but of course the day came that the mind was elsewhere and my little peltier got fried. I like the idea of making my own so I know exactly how it all works and what to replace when the motor or peltier goes bad. Had never thought of doing that until now. .) It had a mounting plate that was wide, came with a whole bunch of screws to mount it too. Reply It helps distribute heat more evenly throughout a room and allow it to warm up faster than it would without a fan. 112 â 2 Blade Heat Powered Stove Fan The 112 2 blade heat powered fan is UK Stove Fansâ original fan. or does it really not matter how much air is displaced? What am I doing wrong? If it does, do you know where I can find a propeller that can fit in a space with over all height of 10 cm? So have fun building your own! Did you make this project? The â¦ The very last thing to do is attach the fan blade and place the whole thing on a hot stove and see if it spins. It included all the right mounting plates that just worked. ...built one years ago (rough pic) inspired from another hack-a-day/instructable build project (the good pic). Thanks for reading, and if you have the time and are so inclined donât forget to comment or vote on this instructable! As a last resort, you could probably buy a motor off eBay. There are no power cords or batteries to fuss with and it doesnât cost anything to operate. I had the brass fittings installed up to the elbow, but you will have to determine the best way to feed the wires. And itâs whisper quiet. Shop with confidence on eBay! Increase the efficiency of your freestanding stove oven or wood burner and circulate warm air around your room the economical way Self-starts at 60°C with a working temperature up to 350° Speed self â¦ Then I drilled the holes in the I-beam. Hacksaw I got my hands on a chunk of aluminum I-beam somehow, but I am not sure where it came from. 4-Blade Heat Powered Stove Fan for Wood/Log Burner/Fireplace Increases 80% More Warm air Than 2 Blade Fan- Eco Friendly(Black) 4.4 out of 5 stars 4,081 CDN$ 54.85 CDN$ 54. The pencil lines in the pictures show where the bends have to be made. Maybe I'll give the amazon fan to my mom for Christmas after I build my own. The motor for spinning the fan blade has to be a low-voltage DC motor, and CD player motors (the one that actually spins the CD) work very well. Even if you had to go and buy all the parts, you could probably still build it for under $30. I'm hoping to eventually build one for my various heaters,, could also build one for taking camping... tent use.. Reply Good luck in the contest, and if you get something posted let me know and I will give it a vote. How it works The magical part about this fan is that it converts the heat of the stove top into electricity, which it then uses to spin the fan blade. I should do something like that if I get around to improving my fan. Even if there was no plastic in the motor, the magnets inside it would loose their pull at high temperature, so it seems to me that keeping the motor cool is a big priority. I read somewhere online about dielectric grease and it specific for preventing or protecting from heat transfer and or also to protect from corrosion, and not as a grounding assistant, I always thought it was for enhancing conductivity but only does by protecting from moisture, corrosion where contacts might not be tight. When the base gets too warm the bimetal strip bends the fan rearward thus reducing the transfer of heat. it is generating electricity from the heat given off from the stove top. Mostly they are used for cooling things like computer processors. Also, try going to computer repair places and asking about any heat sinks they might be willing to part with. I didn't have this but you might want it: Aluminum heat sinks like the ones used to cool computer processors work really well for this project, and they are easy to obtain. By circulating the heat â¦ 4-blade heat powered wood stove fan from Aliexpress This heat powered stove fan is very similar to the previous one, although it is roughly 20% cheaper than its Amazon counterpart. I bought a $150 ish version of this and broke it the first night because I didn't realize my fireplace was too hot for it... lucky they didn't question the return. I just sourced the cheapest and largest heatsink on the internet, which came to this 120cm massive heatsink for $20 shipped. I Know how that feels. The fan gets its power from a peltier element that is used in reverse, i.e. Install screen and baffle and place the pop can heat collector in full sun.4 Get the full instructions at builditsolar.com DIY Soda Can Heater If you drink a lot of soda, recycle those used cans into an efficient DIY solar powered â¦ I will try to lay out the guidelines for you. The fan gets its power from a peltier element that is used in reverse, i.e. One thing we will have to do is sandwich the peltier between the two chunks of metal. About: I love experimenting with science and physics, especially projects that involve electromagnetism, energy conservation and audio. Also, I used plastic to hold the fan blade on, which might not hold up under extreme conditions. With maximum RPM of â¦ This way, the fan speed is reduced as well as the heat it produced. The fan self regulates its speed, meaning the hotter the fire gets, the faster it spins. Itâs sleek and slender design combined with its mini blade size makes this fan â¦ As a bonus, while I was ordering parts I googled 'ecofan' just to see the fan blades they use, and amazon was offering a flash deal on a similar type fan by a different maker for $25, so I grabbed that too. It then chucked the bolt shaft into a drill and as it spun the brass fitting I held a flat metal file against it. Now, finish assembling the brass parts if you haven't already. Hopefully you won't have to do anything like that, as the hardware stores carry all kinds of fittings, and a dishwasher elbow might work really well to replace most my brass parts. Plus, don't forget that recycling collection/drop-off/processing locations are great places to look for dead 'puters. Anyway, some things I need to work on. Also, some of the pictures have little boxes over them, and placing your cursor over them will display additional details. I have seen this type of fan for sale in the Lehman's catalog for $160, but I was able to make this one for about $5, mostly because I had a lot of stuff laying around. Hello, I'm trying to make one myself, however the height can't be over 10 cm. What I use as cold side is one cpu-heatsink, the warm side is one "Aluminum Alloy Heat Sink For Solid State Relay SSR Heat Dissipation". If the motor spins the wrong direction, you will have to switch the wires going to it. I may add some epoxy glue to help it hold up. C-clamps (or vice grips) You can expect a 10-15 Celsius temperature difference between the â¦ on Introduction, This looks really cool. This Heat Powered Stove Fan helps spread the warmth. For this you don't need one that breaks the bank! The Stirling Stove Fan is a Stirling engine powered fan that quietly and efficiently circulates warm air from your wood stove, coal stove or other heat source, throughout your home or workshop, â¦ Take two radiators They have to be big enough for your needs and wet them with thermal fan paste on the â¦ Simply put, peltiers normally work like this: power in = heat transfer from one side to the other. Silent The best aspect of a wood stove fan is that âitâs powered by heat â¦ 1x 1.5V Radio Shack hobby motor ($3) I think I keep burning them out. Shop from the world's largest selection and best deals for Heat Powered Wood Stove Fan. Materials required: With one tec1 pelltier element. The fan works perfectly if I place it on a burner , where heat in more centered under the fan . Okay, so maybe you don't have access to a free piece of an aluminum I-beam, but if you do just put it in the vise between two pieces of two-by-four and saw off a chunk with the hacksaw! First, feed the wires of the peltier plate through the engine block. I made my own fan blade by cutting it out of a sheet of aluminum. This fan works better than the EcoFan in the fact that it dissipates the heat better and can be put up front on the stove without losing too much efficiency. The first pair of bends will be made towards you, the other will be away from you. Heat Powered Stove Fan , EIVOTOR 4-Blade Auto-sensing Fireplace Fan for Wood/Log Burner/Fireplace,Eco Friendly and Efficient wood stove fan 4.5 out of 5 stars 127 $55.55 $ 55. I had to sigh, as I am about half way through writing up an instructable for the trash to treasure contest too... Have some new things up my sleeve though ;), Yes, your video was one of the ones I watched, and I was definitely inspired by the engine block and pipe elbow you went with in your design. It worked... sort of. I did have a fitting with the correct size threads, but it was an elbow, so I cut the part off that I didn't want (see the first picture). Ingenious of somebody . I don't have a lathe, so to turn down the part I fed a small headless bolt (I cut the head off with a hacksaw) through the fitting and put a nut on the threaded end. I feel a little bad that it didn't occur to me to do that in the first place, but thanks for being such a good sport about it. Usually electricity is used to generate the peltier effect and causes one side to cool while the other side heats up. A lot of them gone to the trash or thrift stores because use too much power to practically be used or were rarely used. Insulate one of the connections with a little RTV gasket maker or electrical tape. Share it with us! The heat sinks I used looked good, but donât shed heat very well. Hey that's a simple fix. https://www.instructables.com/id/Improved-Stove-To... http://www.floweringelbow.org/2018/wood-stove/maki... chainsaw engine block (robbed from dead chainsaw), aluminum heat sinks (robbed from dead computers), small low-voltage DC motor (the ones from CD players work well), assorted flat and Phillips head screwdrivers, vise for holding things while you cut them. Worst case scenario is, you have to buy a heat sink off of eBay. Or, better you don't use glue, as you might want to take the thing apart. on Introduction. Set it on top of a wood stove and it blows warm air around the room. While a petrolium grease might have and it noted vasoline has the same properties and near the same performance . File/Sandpaper I use the white stuff because just looks the same, but use the brown black stuff on extension cord plugs I've had out in the weather for years or other plugs.. . Then, not much air is travelling over your fins. This peltier cooler is used in cooling cpus to tabletop wine coolers. More can be found on the wikipedia article on http://en.wikipedia.org/wiki/Thermoelectric_cooling Its been sitting in the shed for years; however your build has just made me think about pulling it out, modifying it a little to sit on our wood fire for this winter. 6 years ago Glad to know you are part of the community. Your fridge will therefore be a bit more efficient. I wil repair my own ,,some day but for now I have two whirring away on my stove and two on my range. Now I could just push the gear/fan blade assembly onto the end of the motor shaft. All the warmth will stay around the room because the fan doesnât allow the heat to go up directly to the ceiling. Now you have to put a couple of bends in the fan blade. You could also try to buy a fan blade off of eBay, or rob one from an existing fan. I have included the PDF of my fan blade design if you want to replicate it, and also the image file that you could scale to the size of your liking. This is especially useful if you want to use it in an off grid cabin or live in the developing world. Also I wanted to make it in such a way you can have a margin of error. I will have to look into that, as any kind of silicone lubricant would probably help with heat transfer. Thanks for sharing. I would suspect that if you were drawing more air through the plates of the heat sink, you'd be cooling that side of your Peltier more quickly, thus reducing the chances of damaging your Peltier. My question is why it doesn't run a 12v fan? 7 years ago For this project, we will use the peltier plate in reverse: heat transfer from one side to the other = power out. It means a lot. The wiring is explain on Wiki, "Thermoelectric generator", which is a great help, and easy to understand, as well as with pictures. Tools required: This one, however, will be a heat sink or other radiator type design that will shed heat efficiently into the surrounding air. Pretty cool well done, I bet it gets lots of looks? Nice job.No mention of the finned Alloy and Copper tube arrangement though, where was that sourced? . I always wanted to build a Stirling engine but the complexity was a little too much for me, but this project was easily doable as a weekend project! Oh, and sorry if I spoiled your trash to treasure plans. Any recommendations on this please? I made similar fan myself but used a cylinder with a flat top piston. For me the easiest way to do it was to bolt the two halves to each other. Might give it a go one week end cheers.Steve. It's relatively easy to build. It was a great idea, and i don't think I would have went that way if i had not seen your video, so I will gladly add a link to your video as soon as i get the chance. I used motor from old portable cd player. I have used a small hobby motor which won't operate at this voltage. I attached one using the existing holes and bolts that held the muffler on. Stove Fan with Magnetic Thermometer 4 Blade Stove Fans Heat Powered Fireplace Fan Aluminium Eco-Friendly for Wood Log Burner Fireplace,Gold 5.0 out of 5 stars 1 $45.99 $ 45 . Here are pictures. yeah I guess maybe i should try it with a taller riser block... You're not alone with this problem. I had some brass pieces laying around, so I used those, though I did have to modify one of them considerably, as I will get into in a minute. http://en.wikipedia.org/wiki/Thermoelectric_cooling, Building Giant Articulated Hands (carved From Wood for Social Distancing). I fed mine through the intake port, then up through the cylinder and out the spark plug hole. On the baseplate is a routed track with about a half inch by three inch bi metal strip fixed at the rear. It works real well as a base but just about any chunk of metal will work. Vaseline also supposedly works, but might melt out.. Model airplane propellers an alternative to making one... Or for something that doesn't end up looking like a motor. I did this for each of the holes to show me where to drill. The only place I've ever seen these was in boat parts supply stores and are expensive relative to what look like cost to build.. An entire unit or all parts could be salvaged from 12v portable coolers. heat transfer from one side to the other = power out. The Stove Fan by Home-Complete is the perfect way to help heat your house on cold winter nights. It was candle driven only though. Now that I think of it, coffee makers have wires inside that are heat protected, I should use those! I am not claiming that my fan is as well made or reliable as the $160 version, but it was certainly fun to build and works pretty well. I'm not totally sure what it is for though. Steel is comparatively poor at transferring heat and is very hard to machine, so it isn't recommended for this project. If your voting offer is still open I'll take you up on it ;). 3 years ago. I think I saw to use Vasoline on battery terminals also to keep them from corroding, but other greases might work the same. 99 Sometimes, peltier plates are called thermoelectric coolers, and that is because when peltier plates are connected to a power source, they transfer heat from one side of the plate to the other. It is hard to describe in words but the pictures should help you understand. My compromise was to use small bolts, diameter #4. it is generating electricity from the heat given off from the stove top. You could use other metals but they won't be as lightweight. Not a problem. The engine blocks of small air-cooled engines, while not as effective (at shedding heat) as heat sinks from computers, make interesting pieces. Yup, the peltier will act as a thermoelectric generator! Share it with us! The pictures above show three of the four brass fittings I used, and how I put them together. Also, I got the link to your YouTube video added into my instructable. I fed a Phillips head screwdriver through the block and down through its mounting holes, then tapped the screwdriver to make a mark. The temperature difference between the bottom and top of the base causes the peltier cooler to produce low voltage electricity which then powers the electric fan â¦ 85 Get it by Tomorrow, â¦ When used in this way, a peltier acts as a solid state heat pump. , where was that sourced various heaters,, could also try to a... Coffee makers have wires inside that are heat protected, I 'm to... It 's for the motor could pass through bolt shaft into a drill and as it the. That way, the faster it spins three pelletiers wired in series to get more power to a motor! Vote as soon as it gets lots of things with the base, which me! 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Is the I-beam burner, where heat in more centered under the fan gets its from! ) fitting fits well into the surrounding air hole w/bolt, or nibblers heard of a heat powered fan diy... Which might not hold up under extreme conditions this â¦ place the fan rearward thus reducing the transfer of.... For 24 euro fan helps spread the warmth will stay around the room peltier plate has to made... Read it more thoroughly when I get a chance had laying around heat will be a sink... Us have an antiquated/not-working desktop computer or two lurking in a closet somewhere heat transfer one. Be over 10 cm heat sink, drawing heat from your stove so requires no or... Pass through here: https: //www.instructables.com/id/Improved-Stove-Top-Fan-from-Junk/, 2 years ago on Introduction, looks. = power out is it to warm up faster than it needs to be made input my. A last resort, you should know that you can develop your own DIY thermoelectric... Heat to go and buy all the parts can be sourced through eBay from vendors...
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