[Stoves] Experiment in generating light using stove heat

[kgharris]

Todd,

For 5 years I have been visiting Aprovecho and have never seen anything like this:

"or maybe they are stoned as usual."

Perhaps your knowledge base is outdated on this.

The small photo shows a bright LED light and a bright diffusion flame.  Is there smoke?  Does the flame need to be this high to get enough power for the LED?  Can a moderate cooking flame light the LED as might be needed by the cook?  

Looking forward to seeing your new products.  From what I can see in the photo the stove is beautiful as is usual for SilverFire.

Kirk H.
  ----- Original Message ----- 
  From: Todd Albi 
  To: Discussion of biomass cooking stoves 
  Sent: Saturday, February 11, 2017 8:53 PM
  Subject: Re: [Stoves] Experiment in generating light using stove heat


  Crispin:


  Congratulations on your efforts.  Will look forward to seeing further developments.


  We found it interested that ASAT/Aprovecho (ARC) awarded a $100K SBIR grant by the EPA for a TEG cook stove, due to ARC's claim they specialize in thermoelectric generation cookstoves.


  "ASAT specializes in heating, cooking and thermoelectric generation (TEG) technologies and has developed clean biomass cooking stoves with Department of Energy grants."



  We will be curious to see if the champions of the WBT's TEG stove currently exists, or will perform as poorly as their emission equipment did previously' or maybe they are stoned as usual.


  We will launch a side fed TLUD thermal electric stove 2nd or 3rd quarter of 2017, that is currently in actual production to measure market interest.  The EPA sure could have saved a lot of grant money for technology that is already in production.  Unless subsidized, unfortunately quality TEG cook stoves that deliver more than 5 watts of power are going to be difficult to produce at low cost to the BOP, in our experience.




  ​  

  Regards,



  SilverFire.


  On Sat, Feb 11, 2017 at 8:18 PM, Crispin Pemberton-Pigott <crispinpigott at outlook.com> wrote:

    Dear Friends of Neat Heat


    The provision of heat in remote areas is a long term human need. Getting electricity for basic needs is also a prime requirement. 


    Jeremy and I have been looking at ways to bring light from stoves (and heaters) using relatively low grade sources (below 180 C).


    Attached is our experiment using a metal plate as the heat source, a very inexpensive booster, a USB ‎port and a high efficiency LED. The middle photo is illuminated by the output from the generator. 


    We are using a thermoelectric cooler running backwards. The cost of the three TEC's plus the 5 vdc booster and the HE-LED is about $7.50. The plan is to keep it as cheap as possible, and separate from the stove. 


    The input temperature can be up to 250 C and we used a pot of water to cool the other side. It lights up the LED bright enough that it requires cooling. We will stick it onto a small rectangle of aluminum sheet. 


    This choice of components is useful far beyond the provision of light because it was able to charge a BlackBerry Passport ‎and a dual lens infrared camera. We also successfully tried an AAA battery charger. ‎


    Regards 
    Crispin 

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