Open Source Portable Forced Induction Thermoelectric Solid Fuel Stove

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Basics

  • It seems the more technical name is:
  • A Portable Stove Using Solid Fuel (Mainly Biomass , Charcoal , Pelletized Fuel
  • It uses a fan to force air through the combustion area making the Fuel to Air Ratio better, and thus increasing heat, burnable material, and reducing smoke/carbon monoxide
  • Also has a thermoelectric module to allow for self-powering the fan, and/or external usage of the power
  • Essentially Device Similar to the "Biolite" stoves
    • EXCEPT that it is maintainable, modular, (and perhaps better preforming (don't boast this till we can) )

Industry Standards

Biolite

Biolite Campstove 1 and 2

  • The backpacking marketed one
  • [1]

Biolite Basecamp

  • Marketed for barbecues (the northern usa definition of the event with burgers etc, not the southern usa definition of a type of smoked food...), and was sold in a similar form as a smokeless stove, and low level energy source for underdeveloped areas
  • [2]

Biolite FirePit

  • Uses the fan to make a smokeless fire pit
  • DOES NOT have a teg module, and is thus battery powered

EcoFire Wood Burning Campstove

Smokehouse Products "Mini-Moto"

Misc Small Products

Existing Open Source Design

  • Various teg desings (these tend to be of the lesser quality DIY/LIFEHACK type spam etc)

Minimum Viable Product

  • Models:
    • Soup can/standard biolite design size
    • Rocket Stove Size
    • Log Sized (~3 logs perhaps?)
  • ALL MODELS have the TEG (the log sized biolite one DOES NOT, may be an advantage)
  • Perhaps devise method of removing ash better?
  • Power Unit is modular, so betteries dieing do not "brick" the unit
  • Fan mode adjustable from off to power generating minimum, to max heat/burn (perhaps even Solid Fuel Wok level, may be another good market (food enthusiasts) )
  • Arduino nano perhaps (as simple control as possible)
  • As many TEGs as possible to maximise the electricity generated
  • Perhaps use the air inlet/fan as an air heatsink (at least partially) for the TEGs to preheat air, and cool the "cold side"
  • Optional ceramic hearth (either ots or even printed with the d3d ceramic printer (Shatter risk, but increased heat retention and tolerance
  • Uses the OSE Modular Battery
  • Either a usb, or a car style barrel jack for DC output
  • User buildable, and maintainable
  • Ruggedized (won't rust, can handle some water (can't be submerged, but splashes and rain) , shock protection (may rule out ceramic, but if it's modular...) ) for backpackers etc to be able to ACTUALLY use it
  • The modularity may lend itself to backpacking etc too due to being able to "spread out" the weight amongst packs (and not bring what you don't need)

Basic Design

Diagrams

  • A Simplified Diagram (Doesn't go into detail on the combustion chamber, and fittings between modules)

Fan Module

  • Small, yet powerful bldc motor?
  • Needs to have high efficieny low speed capability, and relitivly high flow modes
  • CAN drone motors etc do low speed (especially efficiently?)

Frame

  • Welded stainless steel? Strong Plastic?

Hearth

  • Either some sort of metal (most likely stainless steel), or ceramic (would lining with high temp mortar/cement work?)

Heat Adsorber

  • You can just capture heat from the walls, but much of the heat will exit with the Flue Gas
  • You could use an "S Shaped Pipe" to capture more of the heat, but in the spirit of leaving the system "open" and having the flames shooting up the top, a prong sticking into the flame/center of the burn area can be used
    • This is the approach of the Biolite Campstove 2
  • Could also make an add-on for the flame adsorber?
  • May be able to use Heat Pipes , but we need to see what their maximum operating temperature is
    • If they would burst, simple metal rods can be used

Piping

Control Module

  • Arduino nano, or a some other VERY small board of some sort
  • WIFI and all that is not needed, and would just take up space and power
  • Thermal Probe for hearth, air intake, and both sides of the TEGs (and perhaps ambient?)

Battery Module

  • Not really needed, but some may want an integrated battery instead of an external one
  • Make it a clip on module that goes over the power output?
  • A simple supercapacitor, or nothing would work for most use cases (smooth out the variation, especially if a cheap power unit is used, yet not add mass/space

IO

  • Indicator LEDs
  • On/off switch
  • Dial for modes?

BOM

V-BOM

Fan

Heat Pipe(s)

Heatsink

TEGs

CAD

Code

  • Should essentially be a relitively simple thermostat of sorts, along with leds for various data, and the different selectable "modes"

Internal Links

External Links

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