Picture of Fusion Jr. Home Energy Reactor
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The “Fusion Jr.” Home Energy Reactor is in essence a mini-generator that derives its power off of combustible waste material (like paper, wood, yard clippings, and even some plastics) inspired by “Mr. Fusion” as seen in the movie “Back to the Future II”. The potential for energy generation is great, and, in fact, this technology was used to power many cars during World War II and is a suggested energy source for developing countries (to provide gas to power stoves mainly). This is a truly unique project (never been done before), and, if completed, you can say that you have successfully converted garbage into electricity!

This is a green technology that derives power from an alternative fuel source that can be built by mostly salvaged components (well, not everything).

The Gasifier unit cleanly converts garbage into a burnable gas often called “syngas” or “woodgas,” then burns it creating heat which can be used to cook food (I have personally used this to cook a pot of soup) or Peltier Cells can convert the heat directly into electricity. The current produced by the Peltier Cells is sent to a Charging Module. The Charging Module charges a rechargeable Storage Battery. The Storage Battery supplies energy to run a Power Inverter. The Power Inverter can be used to run electrical appliances. Later we will see that after setting up the battery, inverter, and charger, turning this into a solar project is as easy as substituting the Fusion Jr. with any solar panel.

The minimum energy expected from one unit is dependent on how many peltier cells are used. Each cell contributes about 3 continuous watts. Potential energy from a Fusion Jr. system is well over 2000 watts, but harnessing all of that energy is difficult, especially since peltier cells are at less than 3% efficient.
Appliances with high watt ratings can be run even with low input because energy is stored in the Storage Battery.
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colelabonne made it!yesterday

I made one. yay.


Pretty cool project.

Bachlman1 month ago

It´s greener to recycle the trash, but it is a cool project anyway.

Ya ikr? But it is pretty fascinating anyways.

karnold704 years ago
I would love to see someone do a " Solar Steam Trubine" using a Fresnel lens. I think it could be really amazing, and I think you might be the guy to do it.
TheHomebrewGuru (author)  karnold704 years ago
I was looking into using fresnel lenses, but I don't have much money, and one of the downsides of fresnel lenses is that their performance deteriorates (since it is made of plastic, and plastic + sun = bad). But I will do some experimentation in the future
Originally light houses used GLASS Fresnel lenses and these type were far more efficient than modern cheap plastic ones. I don't remember what temperatures they could withstand but it should be about the same as leaded glass so there should be no issue with your proposed use. Hope this info is useful.
Glass can take VERY high amounts of heat. I think it melts at 20,000 F.

20000 degrees Fahrenheit would easily melt through any material known to man.. and if you use powdered glass it will heat up and melt much faster

Typo, I meant 2k. XD

Umm, no. You can melt it in a campfire. Camofires don't get that hot. Glass, high temp glass, melts at between 2000 and 3000 degrees f.

old large reflected tv wil have type of screens that your looking for

Those big rear projection tvs have Fresnel lenses if you weren't aware...
Hello there! There is actually an instructable on how to make your own glass fresnel lense from an old tv. I can't recall it's adress atm but try looking it up. :p
MTNick4 years ago
The CO2 emmisions from this device are nominal and not a threat at all to the atmosphere!

CO2 is food for plants, trees, etc and in turn they produce oxygen.

The problem with CO2 is Humans! We don't like to replant trees after we clear our rain forests for lumber, money money money ....

Green House affect is a naturally occurring phenomina. Did you know that since the Green Intiative started, the Earth's tempature has dropped almost 1.5 degrees globally. Hmm, why is that?

Keep up the creative work and any time you can be free from the tyranical utility conglomerates, you should take it!

Spelling Disclaimer: I am really sorry if I mis-spelled any words or misused gramar rules in this statement, it was not intended to be graded nor a submission as home work assignment, so back off, LoL!

Pyrogenics MTNick3 months ago

yu speld gramar rongg

lloydrmc MTNick3 years ago
"The problem with CO2 is Humans". Exactly. People try to make a problem out of something that isn't actually a problem, and make all kinds of decisions and take all kinds of politically and monetarily expensive measures, all based on a fundamentally flawed and false premise.

As a matter of fact, there are far more trees in the United States now than there were at the time of this country's founding, as we no longer use wood as fuel.

As for why the temperature changed, make sure that you don't fall for "post hoc, ergo propter hoc:, or in other words, correlation doesn't prove causation. Or in still other words, could it be that - even inaccuracies or inconsistencies in temperature measurement methodologies and inconsistencies - that global temperatures can and do change all by themselves, as they clearly did long before homo sapiens sapiens was even on the scene, let alone industrialized.

Objective data prove that the waring trend ended in 1998.
Just because someone argues a point with a logical fallacy, does not automatically make their point any less right: argumentum ad logicam.

While there are more trees in the country than there were 100 years ago, I would love some citations to back up your claim of more since the founding, that still does not mean that we don't contribute to the changing climate.

There is "post hoc, ergo propter hoc", and then there's ignoring an evidentiary argument because it draws upon cause-and-effect. It could also be said, in those same regards, that my typing on a computer keyboard doesn't type because, sometimes, the screen changes on it's own, and i shouldn't be assuming my typing has anything to do with it.

Please display your "objective" data. As NASA, while possibly being "Biased", has put out it's own graph that shows the temperature was still rising at the same rate in 2001: http://pubs.giss.nasa.gov/cgi-bin/abstract.cgi?id=ha07110b (see fig. 1a)
No but it makes their argument invalid and therefore their point unsupported.

So, a rather simple question: is there any way to filter the smoke this produces? I'm starting to build a more complex version of the fusion Jr, with solar and wind power input, but I'd like to filter the smoke this puts out too. Any ideas?

You can use several sheets of Carbon fiber, or you can use high density cotton. I also know that you can use a 5 strand weave Kevlar for high surface area smoke filtration. Also you could use water to bubble the smoke through several times to remove the smoke.

Foxtrot709 months ago

Another method of transferring heat from the Fusion Jr. would be to integrate copper tubing coils to heat water. The heated water can be sent to another heat exchanger in an insulated storage tank or re-purposed water heater. The heated water of the storage tank can then be piped into a house that has circulating hot water as the heat source. The original natural gas/propane or coal fired boiler would then be used as a back-up to the Fusion Jr arrangement.

quader41 year ago

Could you use a stirling engine instead of peltier tiles? I hear those are more efficient.

just a thought on the inverter comment about the wave forms. most sensitive electronics run off DC, even though plugged into AC outlet. through the conversion from AC to DC the power runs through a rectifier (series of diodes to block portions of wave form) which in turn nullifies wave form importance correct? look on you r electronics power supply (plug or label) and chances are you will see 120 vac 60hz in, and #vdc out. a lot of smaller electronics convert right at the 120 AC outlet. Now one thing that can be sensitive is an AC motor. am I correct on this?
spylock2 years ago
I can never find the Peltier Cells.

there u go copy an search.


Hello Spylock Try google searching Peltier and drop the cells. there are many on ebay in USA and Australia , Canada and UK as for other places not sure.
But if you are handy enough to make this project then you are handy enough to know what devices you can get peltiers from.
Car Fridges " not the big ones" normaly 43L ect, USB Fridge << yeah i know crazy right?
How ever this maybe a low voltage 5 volt version or less, Wine Fridges also have them i hope this helps your search, oh rare but some old cpu coolers used to have them, but very RARE.
I a plumber,among other things,and the places Ive checked have been the radio shack type stores.I also do some heating,and was wondering if I might find one at the supply house,to tell you the truth,I had never even heard of em until I found this site a few years back,but they look like alot of fun,and soon as Im able to find them,the fun will begin.Thanks for the reply.
Is that a DeLorean? Yes, it is...:) Use the Fusion Junior to power this:
If you did you would get a follow from me...wink
haugenjames2 years ago
Have you ever thought of using your stove as the heat source of stirling engine?
Blackice5042 years ago
i do not know where i read this as i am all over the net but it was an article about Back to the Future let downs, as things that have not happened in there version of the future.
i seen they posted that there is no MR Fusion, and a remembered a very complex version of your project running a car on this site, and now your simple version, Great work, as this is a simple project to get the basics, i look forward to tinkering.
PPL stop reading my mind about using peltiers to generate electricty LOL.
mekimindi2 years ago
What tools did you need for the job? How did you make the holes, and what did you use to keep the parts together?
durrdust2 years ago
Wonderful instructable! I was wondering what operating temperatures your peltier cells are rated for. After browsing some sources online I have found some with maximum temps of ~200 deg C and some that are rated to ~120 deg C. Just wondering if I need to go the extra mile for the hi-temp variants.

srmousse2 years ago
Great idea! I'm not so interested in the gasifier tech, as who wants to feed a fire all day just to watch 30min of TV... But what has got me intrigued is the use of peltier cells. Why aren't we using these on our water heater chimnies and furnace components... waisted energy reclaimed.
Johan83354 years ago
This is one of the most interesting, well thought out/researched and actually help full Instructable I have seen in a long time. One can see that you know a lot about the subject, and this is something I would like to try on a somewhat bigger scale.
I am in the process in creating a “eco practical” off the grid game ranch in South Africa, and this is part of a solution to two of my biggest problems.
#1 getting rid of the guests and my garbage.
#2 generating electricity.
Any other Ideas from the good citizens of Instructables are welcome.
dh1 Johan83354 years ago
I have as a concept a solar powered idea that I'm going to be utilizing with these Peltier - as a proof of concept - One the one side - copper sheet with the hot side attached, on the cooling side a copper sheet with cooling fins, a mister system and fans ... In Arizona (very similar climate to Australia 40+ centigrade temperatures) - It could easily push 200+ degrees on the copper plate hot side and cool with misting and fans down to make it the 68 degree temperature differentiation that would provide the max amount of wattage from the devices... an array of 30 of these (90-138.6watt versions) can be found cheap and would push anywhere from 2 to 4 Kwh of electricity on a good day.... modify to attach to a gasifier for times of cooler weather or cloudy days and you could easily generate enough electricity to power a house (in az running the a/c at 75 degrees).... That's my thoughts as to how to make these more efficient without using ice...
To the author: Can you specify what your temperature differences are and the output of your peltier devices at the temperature differences so we can get better estimates on what we can expect to see in a real life application?
Johan8335 dh14 years ago
I was thinking in the same line, for on my farm it can reach up to 40 Deg Celsius (104 Fahrenheit or 313 Kelvin) in the day time.
As we all know refrigeration, cooking and water heating for showers are the main consumers. So this is what I am concentrating on.

Shower water is easy with solar heating system (maybe need gas for supplement)

Cooking is possible with solar devises but not all practical and not usable “indoors” so gas will have to do (For now).

Refrigeration, now this is what I want to concentrate on here. Solar panels with a battery system will work but batteries are hi maintenance and the right batteries are “hi cost”.

So this is my Idea and would like to know any comment from you guys where one may make it more efficient. This is still in Idea form so don’t judge me to loudly LOL
Two copper plates separated with spacers for water to flow between and painted black on the outside mounted on the roof. Water pipes running (as short as possible and insulated) down to my fridge (standard with all working parts removed). Mount Peltier cells inside the fridge with “warm side” protruding to the outside.
The “hot side” of the Peltier’s will be heated by the hot water from the roof, creating a current to run #1 a fan inside the fridge and #2 a small circulation pump to circulate the water.
The problem is to get the fridge cold in the first place to start the action. The fridge being an insulated and mainly closed unit could be started with ice or frozen anything. This should get the cycle going. Maybe even have an additional Cold water system running inside the fridge.
Now that I actually sit and type this from my thoughts it is sounding a bit like perpetual motion, even the fact that the sun is providing energy.

Maybe have Peltier cells on the copper plate powering Pelrier cells in the fridge, to replace the water piping system and using a water system to cool the Peltier cells on the roof and in the fridge.

Maybe even have an additional Cold water system running inside the fridge.
Let me know what you guys are thinking, remember its only an Idea and from here We can work.
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