Electric Power from Heat... ??..

[Tim Horton]

OK... Disclaimer... I am for the most part electrically illiterate...
However, I have seen some kind of attachment on a small wood fired type Rocket Stove that produces electricity.. Enough to charge a USB type connection to a phone or other small appliance of the like..

I presume it is somewhat the same kind of principele as a ...thermocouple... on an gas oven, water heater or the like..

Are there attachments that would go on a wood stove, fireplace, bon fire, or the like to produce some level of useful electricity.. ??...

Facts, details, experience, resources.... ??...

 

[d_marsh]

I am no expert, but look up: Gasifier.

 

[Neb]

OK... Disclaimer... I am for the most part electrically illiterate...
However, I have seen some kind of attachment on a small wood fired type Rocket Stove that produces electricity.. Enough to charge a USB type connection to a phone or other small appliance of the like..

I presume it is somewhat the same kind of principele as a ...thermocouple... on an gas oven, water heater or the like..

Are there attachments that would go on a wood stove, fireplace, bon fire, or the like to produce some level of useful electricity.. ??...

Facts, details, experience, resources.... ??...

Peltier effect.

https://phononic.com/resources/how-...ffect refers to,current as well as reversible.

The peltier will work both ways.

Run a current through it and one side gets hot and the other cools.

Or

Pass heat energy through it and will produce a current.

@Biggkidd was experimenting with them last year. I try to find her thread.

Ben

 

[Neb]

OK... Disclaimer... I am for the most part electrically illiterate...
However, I have seen some kind of attachment on a small wood fired type Rocket Stove that produces electricity.. Enough to charge a USB type connection to a phone or other small appliance of the like..

I presume it is somewhat the same kind of principele as a ...thermocouple... on an gas oven, water heater or the like..

Are there attachments that would go on a wood stove, fireplace, bon fire, or the like to produce some level of useful electricity.. ??...

Facts, details, experience, resources.... ??...

Thermocouples use the galvanic voltage of dissimilar metals bond together. The voltage is a function of temperature.

Ben

 

[Neb]

Peltier effect.

https://phononic.com/resources/how-thermoelectric-cooling-uses-the-peltier-effect/#:~:text=The Peltier effect refers to,current as well as reversible.

The peltier will work both ways.

Run a current through it and one side gets hot and the other cools.

Or

Pass heat energy through it and will produce a current.

@Biggkidd was experimenting with them last year. I try to find her thread.

Ben

See here

https://www.homesteadingforum.org/threads/thermoelectric-power.17533/

Ben

 

[d_marsh]

This is why I started with "I am no expert".

 

[Neb]

This is why I started with "I am no expert".

Peltier crystals are like piezo crystals used in piezo electric lighters or the ingnitors in gas heaters and gas water heaters in that their crystal structure is at the heart of the effects.

Think of the crystal structures as stacked billiard balls. There is are axis that runs from top to bottom, left to right, front to back.

In a peltier crystal you run a current from top to bottom then left gets hot and right get cold. Or heat the top and cool the bottom then current flows left to right.

In a piezo you squeeze on one axis and a voltage is produced on another axis.

I studied both in college and used them work projects.

Ben

 

[Hardcalibres]

If you want a small unit to charge USB devices, then these little cook stoves will do that:


https://www.bioliteenergy.com/products/campstove-2-plus


https://www.bioliteenergy.com/products/campstove-complete-cook-kit


They don't produce a lot of electricity......but if you are going to do small scale cooking anyway, then the electricity produced is a useful by-product.