Close
0%
0%

Portable thermoelectric generator for campfire use

like the Biolite wood stove, but much smaller and lighter while delivering more power at 12 V rather than 5 V

Similar projects worth following

Uses Peltier junctions, heat pipes on one side that go into the fire, temperature sensor with alarm to prevent greatly overheating the Peltier junctions, heat sink and fan on the other side (or gravity water cooled), produces power to charge a 12 V battery.

View project log

Enjoy this project?

Share

Discussions

mr.jb wrote 05/05/2015 at 21:12 point

It is hard to tell which one is the best, since they don't say much
about TEG limits ( hot cold side ) and how they expect the TEG to last
with wear and tear. ( I have one pot from each company as well as a
bilote-stove and some more stuff ;-). So far I can just say I'm most
disappointed with my biolite stove ( mostly because it's very heavy and
impractical ...but I think heating a rod is a good tactic to avoid
overheating ...but still I have lost interest in it). The pots are very
likely to sooner or later be overheated, I try to treat them nicely (
planning for a temp guard ).
I think TEG with high max-range ( hot
cold side ) and a pot with large surface area and "large" watervolume
AND that is "well applied" to the cooling surface is a good start..


more solutions
http://www.tegmart.com/thermoelectric-generator-products/

  Are you sure? yes | no

Dylan Bleier wrote 05/05/2015 at 23:15 point

maybe have a thermocouple that gets the temp of the hot side, and if it gets too hot, a mechanical valve diverts some of the water cooling from the cool side to cool off the hot side.  that would prevent overheating.  and yeah, maybe use a metal rod to conduct heat out of the fire to the hot side rather than sticking the whole thing right in the fire

  Are you sure? yes | no

mr.jb wrote 05/05/2015 at 03:49 point

If you have a "connection box" outside, you can switch parallel / serial  ( for the preferred voltage ). The key to success is reliable cooling...My guess is water is the best option for a portable system. The "only" relay difficult part is how to make this rugged and reliable, especially if you plan to use fire directly from a wood-stove. ( the biolite solution is heavy and requires moving parts..and small top-fed stoves tend to be very impractical )

Module - 19 Watt 4 Volt 56mm
http://www.tegmart.com/thermoelectric-modules/tegpro-19-watt-high-temperature-thermoelectric-module/

and don't forget.... ;-)
http://www.electronics-tutorials.ws/dccircuits/dcp_9.html

so far these two is the best I know of 

http://tes-ne.com/English/product/

http://powerpractical.com/collections/generate

  Are you sure? yes | no

Dylan Bleier wrote 05/05/2015 at 04:14 point

those are some impressive generators in the 2nd to last link, if they work as advertised... but at what cost?

  especially that hot tub one

  Are you sure? yes | no

Similar Projects

Does this project spark your interest?

Become a member to follow this project and never miss any updates