Bimby cooking a meal

As I promised before, here it is a chart of the electricity used by Bimby while cooking a soup and boiling vegetables afterwards (with Varoma).



There is, however, something that is not exactly right in the chart: the system takes more power samples when there is frequent change than when the power level is steady. The power samples could be 12, 24, 36, 48 or 60 seconds apart between each other, but Excel does not draw them differently, it'll have to be me to create the missing samples to make them all 12 seconds apart. This means that the chart is not exact in terms of time axis, but it shows what happens to power during the meal cooking period. I assumed in my calculations that the 200W you see as a base load did not belong to the Bimby itself.
That said, I calculated the energy needed for the two moments, the soup and the vegetables. That took exactly 49 minutes and 48 seconds and the energy used was 0.336kWh. This means about 5 Euro cents of electricity to cook a meal.

Now, what is the amount of energy you need to supply to 1 L of water to make it raise from 15ºC to 100ºC? It is the difference of temperatures (85ºC) times 1 Cal per gram, which means 85,000Cal or about 0.1kWh. To make the soup, it took about 25 minutes and the cooking needed only a little more than 0.1kWh. This demonstrates (roughly, I know) that the Bimby is indeed a very efficient device. Perhaps one of these days I will make the experience of boiling 2 L of water with a thermometer inside the Bimby to check exactly how much energy do you loose with the losses and the energy transference from electricity to heat. I would say the overall efficiency is above 90%.