Re:dumping a lot of heat

john larkin <jl@glen--canyon.com> Wrote in message:r

I'm thinking about building a biggish rackmount dummy load box. Itwould simulate series resistance and inductance. Part of the problemis that it will need to dump a lot of heat.We are using copper CPU coolers on PC boards, which are great up to acouple of hundred watts, but I'd like to do a kilowatt or two.https://highlandtechnology.com/Product/P945It would take a heap of expensive extruded heat sinks and fans to getrid of a kilowatt. At 1 K/W, a pretty good heat sink, that's 1000 degCtemp rise.A small hair dryer can dump a kilowatt. So some sort of red-hotnichrome coils and a vicious fan might work.I'd prefer to not use water.I wonder if there is some sort of runs-red-hot power resistor.

There are those Edison base ceramic heaters . Maybe you can cobble
 up something with those.

Cheers
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