(10-17-2009 11:42 AM)Nomar Martinez Wrote: Now if we change to KOH and measure the amount that we add to distilled water and measured the resistance with a multimeter @ the same temparature as we normally use the baking soda, we will get close to our goal of the mixture that we are looking for. Tell me if I'm correct according to your experiences.
Nomar Martinez, Electrical Engineer
Because you are an Electrical Engineer, I can tell you that the cell has a diode characteristic. Changing the electrolyte will change the forward voltage (like Si versus Ge). Ohm's law apply only for linear loads. The cell has negative resistance in temperature.
The best (and easy) way is to use a constant current source and, at the desired temperature and current, to select the best electrolyte for maximum output. So far, from my experiments, KOH works the best, but it is dangerous to handle.
There are many variables in this system, but maximum efficiency is achieved at the highest temperature + minimum applied voltage + maximum practical surface + maximum concentration of the electrolyte + minimum open voltage for the electrolyte.
Current control is mandatory (with electronics or cooling systems).
With the multimeter you will not be able to start the cell.