Ultra efficient solar electric cooker! 20 Watt Solar Panel can cook an egg with diode chain
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- Опубліковано 2 жов 2024
- With only 10-15 watts of solar power, this prototype mini solar electric cooker can cook an egg, boil water or cook food. The power source is just a 20-watt 12 volts solar panel. The cooker uses a solid state heating element to convert direct DC solar power to heat. Because a diode chain can act similar to an MPPT circuit, it extracts more heat from the solar panel under a variety of changing solar conditions. It's possible this tiny solar cooker broke a world record, as it reached near boiling temperature at just 3.0 to 5.8 watts of power. Further testing will be undertaken to see what the limits are.
I made this insulated solar electric cooker (ISEC) prototype to demonstrate what a diode chain or diode string can do with a small solar panel to cook food. Combining an insulated container with a diode chain can make an effective and efficient solar electric cooker. A cooker like this uses a direct DC solar panel input (PV-to-Load, PV2L) to operate. It requires no battery, no DC converter and no charge controller.
🟢 Larger sized portable cooker in development - hope to show that one soon.
The potential applications include camping, hiking, austere situations, survival, remote sites and rural areas where times are tough and cooking fuel is hard to get.
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🟢///PARTS LIST///🟢
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6A Silicon Diode amzn.to/3IgODz6
Insulated Food Containers EXAMPLE amzn.to/3uVlAy2
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Music credits: by TuneTank, Pixabay
Your video caught my attention pretty well and forced me to become your new subscriber.
Been looking for projects related to direct current from solar panels. Hopefully to replicate some of your projects.
From the Philippines.
@argellaguardia9390 Welcome and thanks for subscribing :) I hope the content will be helpful. Direct solar cooking does not get a lot of attention right now, but I believe it can be useful to many people. It solves the need of repeatable, renewable, long-term cooking (indoors) without fuel (and at lower entry costs)
@@solarpoweredge - indeed! And you put into action your great ideas that can be beneficial to millions of families around the world. Thank you so much!
Just have a food temp sensor inserted into the meat to verify when 135-140°F hits.
@stephenbaker3680 That would work
That is SOOO Amazing, Thank You For Sharing your Work ....I ordered the diodes and I Have some ideas, when I have them built I will link You the video .....AWESOME...!
@wpgenlighten4truth2 welcome :) have fun with the diodes, I think they are amazing
Dude! 175°F PLENTy! When meat/chicken internal temp hits 135-140°F range a few min food experts say you ARE cooking & after enough time..yer DONE!
@stephenbaker3680 Right... I'm no cook, but with as much as 212F, this thing should cook a lot of different foods and certainly can heat up a can of soup easily
Water heating is a great storage system on a solar system. This would work for a hydronic heating system with a huge storage for all night operation or even 2 day backup at elevated temperature storage with a mixing valve. No batteries required except for small efficient hydronic pump like Grundfos.
@timbrown9305 That is true! I'd like to build a dedicated solar heating system that uses water tanks, hopefully I'll have the chance
Basically this is a diode potential divider. Each diode will drop around 0.6 volt across it, depending on the specific diode, this is for silicon diodes which is effectively the only type that will be used today. As long as the voltage across the whole string doesn't exceed the max reverse voltage of an individual diode, they will quite happily conduct like they would in any circuit. The number of diodes in the string, or divider, determines the current flowing with a given voltage, if that current doesn't exceed the max forward current rating of each individual diode they will function without issue. Current X voltage = watts dissipated in heat. Theoretically, one diode with a sufficient current rating would dissipate the same heat as a number of diodes with a lower current rating. If that one diode didn't exceed it's max junction temperature, it would work equally as well, but would probably be more difficult to incorporate into a practical design. Maybe say 4 or 6 smaller current diodes in a package with an external metal tab would be easier to use, as they could be screwed or bolted to an aluminum or copper dissipator, which could be used to transfer the heat to container. All semiconductor devices dissipate heat when in use, normally that is undesirable but unavoidable, and is treated as waste that must be thermally managed, hence heatsinks and fans found in many electronic devices. So this is an interesting perspective on the subject!
@turboslag I found that DC fans can receive a voltage supply lower than the solar panel, by connecting across some of the diodes. Diode current is exponential of voltage, so that's why they work so well with solar panels, a current limited source.
US government wouldn't allow such an efficient device for open sale.
@Buddyelvis1-2022 Very likely, probably need to upgrade it to 1kW and sell it as the "instant egg cooker"
Your diode string idea may be a patentable idea.. ..cheap way of matching panel power to the load to maximize efficiency. My idea is to solar cook oatmeal, rice , beans in those 12volt stainless steel thermoses they sell on Amazon. I successfully heated water in one to 170+ degrees and made ramen...about 30 min. So I was thinking...what if you built a ?6 inch thick styrofoam cube for the cooking vessel with small hole for steam to escape and a drip tray to let water condensate drain out through a small bottom hole. Also would need a temp switch to turn solar/batt power on/off so as not to burn up heat element. Kindof a hybrid haystack slow cooker. Trapping all that heat should allow the food to cook much faster and use a fraction of the energy.Doubling insulation r value results in half the heat loss!
@CharlesGwinn-ep9pb yeah diodes have been working amazingly well. I made larger diode cookers and projects but they are not on video. Maybe by this winter.
I like your idea about insulation. There are a lot of things to try. Keep on experimenting!!
Will you elaborate the diod connections.
Please
@seddiqullahkhaliqi5916 Hello, they are a series string of diodes matched to the solar panels approximate Volts-max-power range. Of course it is not perfect regulation, but acts very similar to an MPPT circuit for very cheap price.
To see earlier experiments, tests and explanations, please try these 2 videos:
ua-cam.com/video/6D0aUmkUQSQ/v-deo.html
ua-cam.com/video/42XIbHA9Dv0/v-deo.html
Can we make 5 kw heater from this diodes
@venkateshachary9949 Hi and yes, there are 2 ways at least to do so:
1. Most expensive option is 100-200a power rectifier diodes with proper heat sinking.
2. To heat my workshop, I have finally combined a 50 amp power diode string with standard resistance heaters. This means the solar panels will stay near the solar panel Max Power voltage, the resistance heaters will run at this voltage too, and the diodes will extract the remaining heat while also regulating the voltage - I will try to share this setup as soon as possible
shark tank needs to see this one.
Maybe they'll click on this, who knows :)
Cu ajutorul concentratorului solar chiar si Fresnell randamentul poate este mult mai bun ,daca aveti posibilitate faceti o demonstratie
Oricum va multumim pentru ce ne prezentati❤
Bună ziua domnule, intenționez să încerc aceste lentile mai târziu, mă bucur că vă place videoclipul, aveți grijă :)
Hard boiled egg: 10 minutes at 100 degree Celsius - that's fairly easy to remember. 😃
-But I guess the water in this video is just shy of 90 degree Celsius - certainly enough to cook an egg.
@68HC060 Now that's something I can remember! Apparently I overcooked this egg ... but it was still edible lol
I think with Monocrystalline panels you would get more power out of them in cloudy days. they are known for that
@LienoGenesis It would be interesting to find a 20w mono panel. Even a couple of watts would make a difference
Did you use 3A or 6A diodes? Thanks
@alhumble8175 Hello, this thing is tiny so I used 6A diodes. But even 3A diodes might work. Just make sure the heat gets transferred into the water, otherwise the diodes get super hot and burn up
Brilliant video
I'm hoping to grow seeds off grid and need to beat the soil with soil warming cable. It's a big area typically 5feet by 2 feet
Do you think this would work or connect solar of direct to soil warming cable
Keep up the great research
@daveswords2112 Hello, I think it's possible to make such a heating element, is the soil in a separate container or indoors? The diodes and wires should be protected from the dirt and moisture. Otherwise, they might corrode and become damaged. But yes I think it would work
Yes sir thhe heating diodes can be protected from the soil and moisture. Normally you run heat cables in wet sand then place seed tray on top.
Not sure how you would get a good thermal coupling with diodes
Thank you buddy
@daveswords2112 You are welcome sir. Thermal is certainly a challenge. Perhaps some kind of pipe with the diodes inside and heat sink compound or sealant to help the diodes connect with the sand. This is all highly experimental stuff so who knows whether it would work. I am still testing different kinds of diode heating elements to see what works best
You just triggered an idea.
Vacuum forming the diode array in plastic. Similar to how woodworkers. vacuum seal. When Veneering timber. Thanks
@daveswords2112 That sounds pretty cool, thinking outside the box for sure
You could make one that will heat a loop and it could power in floor heating. Can’t wait till I can start doing things like this. I’m 3/4 done or king on the shop, my inside winter project. I’ll have everything I need to start having more fun this spring.
@Nofukzgiven Yeah good thinking. I wish there were big vacuum insulated containers about 10 gallons (they'd probably cost a lot). Your shop sounds like fun. I am hoping to start a few new workshop projects in spring - if things go well enough
This is awesome! I'm wondering if the diodes would degrade quickly with the cycle of heating / cooling. Any thoughts on that?
@ttucker2010 Glad you like it :) From the research I have seen, they usually last a very long time. Cheap to replace too. But overheating can destroy the diodes of course. Honestly I never felt like abusing diodes this way, but it's so interesting I couldn't help but give it a try! And the rest was history...
@solarpoweredge Please tell us what diodes you used, how many and they are wired in series right? I would like to duplicate your project. Did you put any protective cover on the diodes? Is that necessary? Maybe you can do a video on the build with all the details. Thanks!
@ttucker2010 1) Both cookers have normal unbranded silicon rectifier diodes, axial package 2) the number of diodes depends on the vMP range of the solar panel, so just add however many for the voltage you would like to use 3) they're all wired in series.
Regarding build video, I am already running flat out so wasn't able to but perhaps in the future can do it??
@@solarpoweredge Thanks!! I'll give it a try.
@ttucker2010 Welcome sir!
I tried today a string of 10a diodes on my small solar panel (20v 4amp max at mptt)
The diodes draw as much power as the mppt solar controller. I just need to try in poor conditions. The big issue is cooling .. maybe I will try with the allu profiles
@cgmarch2359 Nice job... getting the heat out is the toughest part in my opinion. Too much and they burn up. Testing some aluminum heat sink ideas at the moment
There is the ideea to parallel them to share current.. and with a good radiator maybe it will work?
@cgmarch2359 Yes it will work, the current will be shared
Ok I tried it with very little sun.. just 3w and again works the same as mppt. Basically as long as you match the number of diodes with the mppt volts.. it will work and draw the max power
@cgmarch2359 Amazing, it works so well. Great research you're doing there :) This technology really needs to be developed further.
Could you add a link to the diodes
@markirish7599 Hello, sure I have added links to example diodes in the description text
excellent idea, keep it ongoing! I'm going to be playing with the idea. thankyou from the UK
@lexloose2112 Thank you! and hello from US :)
WHAT KIND OF DIODES ARE THEESE
@Sammyflopped Hello, they are very cheap Silicon Rectifier diodes. There are links in the description. Just make a string of them in series to drop the appropriate voltage. Make sure they don't get too hot, I keep mine around 100C. Please see my other diode videos for explanations of voltage drop, hope that helps :)
@@solarpoweredge alright, also can the run on dc also ?
@Sammyflopped As long as the DC is current limited to what the diodes can handle, yes. Diodes will consume all the current (amperage) available. A solar panel might put out 3 amps, but a battery could put out 500a and burn the diodes. Matched diode strings are best suited to direct DC from solar panels because of their "MPPT-like voltage regulating" properties. If running off of a battery, that need goes away and perhaps a resistance element is better suited. I like the idea of having a flexible 12v DC option on a diode based cooker, so perhaps a CC-CV boost converter would be one way to achieve this. Either that or have a dual-element cooker; diode chain for solar input and a separate resistance element for 12v operation. Thinking in survival mode, I tend to prefer the simplest options with little to no electronics.
@Sammyflopped Also I neglected to explain this in my video: diodes are temperature sensitive, so the diode chain should be configured for the operating temperature you need. At 60C the diodes will drop more voltage than at 100C. You might notice this as they warm up. Therefore, if you are boiling water, use the correct number of diodes for 100C operation for best results. The downside is they won't pull as much current while initially warming up. In my tests I didn't find that to be a huge problem though.
@@solarpoweredge thank you for explaining this stuff!
BRO START MASS PRODUCING AND SELLING PLEASE
@Sammyflopped Right on! I hope these make it to the store shelf
@@solarpoweredge Sammy is absolutely right! Couldn’t agree more! This is the future!
Thank you Dave!
@redzebra6688 Welcome :) I am so glad there are other people who understand this kind of stuff... it's super motivating!
Lovely Sir the diodes r on amazon?? ❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤❤
@steveadal4735 Yes sir you can use standard silicon rectifier diodes. Link in description or just search Amazon etc. Note - for a small container, the smaller diodes are easier to fit as it takes well over a dozen of them. I like to use 6 amp and 20 amp diodes mostly. I used the smaller diodes here, as the 20a are too physically large