Which is an appropriate but simple electrical circuit to reduce the energy (power) consumed by a heating coil which has an AC feeding without generating an asymmetric load (large DC component, e.g. with a diode)?
I know that this would make it cooler.
Some heating coils consume a lot of power (kilowatts), so a simple resistor in series would be a bad idea (difficult to cool). A capacitor in series is also very easy, but way to expensive for the two months application I want it for.
I think what I need is a kind of dimmer, a thyristors or triac. But I want to have a fixed rating, it doesn’t have to be adjustable. Of course I have no problem if it is adjustable if the electrical network is still easy to understand and to build.
E.g. if my power source is 230 V AC, 50 Hz. The heating coil has a power consumption of 2300 Watts at this voltage but I want it to consume only 1400 Watts, which parts are most recommendable and how would the circuit look like (or what is it’s name, I could then search for it).
PS: This is the second attempt to ask this question. The first one was to specific on my dishwasher and inverter, but also got some interesting answers.