RESEARCH PROJECT: creating a practical and affordable alternative to immersion resistance heating elements for solar electric water heating systems, while avoiding complex MPPT tracking circuits. Although such an option isn't commercially available, I managed to build several of my own prototype semiconductor based immersion heating elements which accept direct Solar PV DC input. They do not need DC conversion and are able to perform rudimentary voltage tracking, resulting in a voltage profile similar to MPPT - but without the complexity and cost. The reason is they use something unexpected to extract heat: a diode chain or diode string.
It is sometimes said "Diodes don't obey ohms law". That's because Ohms Law is actually only a Model covering standard linear resistance elements. Diodes are not resistors and thus behave very differently. After many hundreds of hours testing them, I have learned how to use their behavior to extract more heat from PV solar electric power, while avoiding complex expensive MPPT ciruits. To learn more about how diodes behave as a solar powered heating element, check out my other videos and research posted below!
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🟢 Semiconductor Space Heaters! Solar Electric Powered with voltage tracking https://youtu.be/Cle05mmYOUs
🟢 Tiny 14W diode based cooker and a 20w solar panel boils an egg!! https://youtu.be/CRhkZp6ECHk
🟢 Diode Chain research Part 1 https://youtu.be/6D0aUmkUQSQ
🟢 Diode Chain research Part 2 https://youtu.be/42XIbHA9Dv0
🟢 Some of the first tests I ever did with diodes https://youtu.be/nu44wRBErc8
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My video talking about the Hot Diodes paper: https://youtu.be/whOXELklxQ4
Hot Diodes! on science direct paper link https://www.sciencedirect.com/science/article/pii/S2352728519300508
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Check out our blog - Solar Thoughts Blog!
https://solarpoweredge.com/
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Check Out My New Amazon Storefront for project parts and more! Please note this store page earns me a small commission and uses affiliate links: thank you for supporting my channel! :)
https://www.amazon.com/shop/solarpoweredge
These are affiliate links: I may receive a commission if you use them to shop. Thanks for supporting my work :)
Standard Silicon diodes used for diode chains: https://amzn.to/41KBitx
Bridge rectifiers used for semiconductor space heaters shown: https://amzn.to/3FbInuA
20A diodes: https://amzn.to/4ioX37I
6A diodes: https://amzn.to/4ioWUBc
DC Voltage and Wattmeter: https://amzn.to/4i64hO9
Thermocouple thermometer: https://amzn.to/3DmIwdR
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Music credits: by TuneTank, Pixabay