Solar Hot Water: Boiling Diodes test! Solar electric cooking research

Рет қаралды 1,199

Күн бұрын

Solid state solar-electric heating elements are potentially very useful for solar electric cooking, solar hot water and solar heating. ( • Solar Heating - Solid ... ) They can cook food, heat water and produce space heat directly off of solar panels. The main benefit is they can extract more heat from the same solar panels versus resistance heating elements (this will be explained in part 2 of the video series).
Here are a few clips from my solar workshop where I am investigating the potential of solid state heating elements for solar cooking and heating applications.
This video is part of a series investigating Solar Electric Heating with Solid State semiconductor heating elements. Diode strings are a very efficient way to get the most electric heat possible out of a PV solar panel array, and I became very interested in applying this technology.
___________________________________________
Part 1 of series - first heating element tests: • Solar Heating - Solid ...
This video (solar hot water test)
Part 2 explaining how solar powered solid state heating elements work:
• Solar Electric Heating...
___________________________________________
It's hard to believe, but simple diode strings (diode chains), which are semiconductor junctions and some of the most basic electronic components available, can actually hold the Voltage of Maximum Power (Vmp) of a solar panel array nearly all day. And they can do this without any supporting electronics. They are a practical heating element for solar electric heating and PV-to-Load applications.
PV-to-load is the concept of attaching useful loads directly to PV solar panel arrays (direct solar electric DC power), bypassing the traditional battery, inverter and charge controller setup. Operating heating loads directly off of solar panels makes sense as it saves wear and tear on expensive discrete solar power components and equipment. See videos below for more information about this concept.
----------------------------------------------------------------------
🟢 Other videos
----------------------------------------------------------------------
🟢 Solar Heating and Cooking Playlist - PV-to-Load
• Solar PV To Load Heati...
----------------------------------------------------------------------
🟢 Solar Electric Heating Playlist
• Solar PV Electric Heat...
----------------------------------------------------------------------
Solar Electric Cooking Playlist
• Solar Cooking Videos
----------------------------------------------------------------------
🟢 Solar shed ventilation with DC fans and Solar Panels
• Solar Shed Ventilation...
----------------------------------------------------------------------
🟢 Background info on My Solar Workshop (metal building)
• My Solar Workshop - of...
----------------------------------------------------------------------
Check out our blog - Solar Thoughts Blog!
solarpoweredge.com/
----------------------------------------------------------------------
Like this type of video? Please Subscribe: / @solarpoweredge
sub_confirmation=1
----------------------------------------------------------------------
#solarheat #solar
#offgrid
#offgridsolarpowersystem
#offgridsolar
#offgridandongrid
#solar #solarelectric #solarelectricity
#gridtie
#gridtiedsolar
#gridtieinverter
#inverter
#inverters
#solarlight
#solarlighting
#solarlights
#offgrid
#offgridsolarpowersystem
#offgridsolar
#offgridandongrid
Music credits: by TuneTank, Pixabay

Пікірлер: 11

@solarpoweredge 5 ай бұрын

This technology is widely misunderstood. To overlook or dismiss diodes strings would be a mistake. I recommend watching my newest video to help understand the technology: kzfaq.info/get/bejne/apiIfMV5pp-opmQ.html Here is a short explanation. Diodes are the _simplest_ way to extract the maximum (heat) energy from a solar panel that has ever been found - so far. It appears only a few researchers have investigated the idea. Diodes are NOT Ohmic. Relationship between current and voltage is logarithmic/exponential depending on which way you consider it. They drop a set amount of voltage, which is "relatively" constant. As a result, they function beautifully as a direct solar power heating element, providing "MPPT-like" behavior. The problem is this is relatively obscure technology, few understand its amazing simplicity, and there are no really suitable diode packages at this time. So far, all researchers have had to make do with what they could find off the shelf. Usually axial packaged diodes... So far I have built 2 solar cookers and working on a water heater using this technology. I hope to scale these projects up later.

@tobysmith3668 5 ай бұрын

If you place a low value resistor under the diode string; and run that through a TMOS power FET to ground; you can control the current by PWM (pulse width modulation) and save the diodes from over-current failure.

@solarpoweredge 5 ай бұрын

Another good idea to experiment with, thanks!

@tobysmith3668 5 ай бұрын

@@solarpoweredge An Arduino will monitor the resistor voltage, and drive the TMOS power FET directly. This will allow you to set the maximum current,

@solarpoweredge 5 ай бұрын

@tobysmith3668 I bought an arduino board a couple years ago, hope to dust it off soon and give it a try :)

@tobysmith3668 5 ай бұрын

@@solarpoweredge It will work best if the sending resistor actually ties to ground on one side, with the FET just above that. Some have a differential voltage amp, but grounding one side will cut a lot of noise without hurting gate drive levels. Mart Hale in Florida is a long time friend, and sent me you contact information. We were thrown off of FB about the same time, but we had exchanged emails first.