Oxymoron wrote:In short, if my calculations are correct and if electric kettles manufacturers are dumb
I'm not much good with electrical engineering, having not studied it past an introductory circuits course and so I can't add anything past what you've posted, but I suspect the second part of the above quoted sentence just might hold true.
It's just a suspicion mind you, but not entirely unfounded. For example*, toilets in America, at least for a time, were poorly regarded if they weren't the older kind and when compared to say, newer, Japanese models. What had happened was that the government had mandated a lower gallons/flush amount and the American manufacturers, being cheap and lazy, just changed the amount that would be stored in the tank and then flushed. Something along those lines. Japanese manufacturers, on the other hand, redesigned both that
and the path and profile of the outflow pipe to design around the reduced amount of water being flushed. The result is that you got some serious suction on the Japanese models that took The Item away efficiently, compared to the American models, which made people long for the older water-wasteful models.
That all said, I have one (an electric kettle I mean) and, as far as I can tell, there's no problem with it getting water boiling. Though I don't know how well they do in Europe since the last time I visited my relatives over there I was 10(?) and my grandfather, at least, still boiled water in a stovetop kettle.
*This all according to my fluid mechanics professor.