[Stoves] TEGs In-Reply-To=%3C9pc0kb1vrd6p4omok6ncg7iqig2cgfrf3j%404ax.com%3E

[Sluis, Paul van der]

Dear AJH,

The Philips stove does NOT use significantly more fuel because of the attachment of the TEG.
The TEG unit takes around 100 W of heat from the fire. 98W is waste heat of the unit (2% efficiency). That 98 W is recirculated into the fire because it is used to preheat the combustion air.
The remaining 2W is fed to the fan. In the fan 1.8W is transformed into heat (just 10% efficient). Also this 1.8W is fed back to the fire.
So just 0.2W is actually taken from the fire. An estimated 80 % of that power is lost as pressure drop over the nozzles that feed the fire with high velocity air. That loss is gain transformed into heat that comes into the fire.
So the real power taken is around 0.04W. That needs to be compared to the power produced: 4000W. So an estimated 1/100000th extra fuel might be required.
The might comes from the fact that in this case the energy lost is caused by the kinetic energy of the air moving away from the fire. But even a natural draft stove has these losses.

So it is safe to assume that with the Philips construction NO additional wood is required because of the use of a TEG.

Kind regards,

Paul.
P Take care of the environment, print only if necessary ...


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