Most thing you struggle to approach anywhere near 100% efficient, heating is a bit easier in that you can get a lot closer, but you’ll still hit limits before reaching 100%.
Saying inefficiencies are lost as heat is really a lazy simplification, inefficiencies are lost as anything
It just turns out that 95% of anything is heat, from entropies perspective.
My oil heater makes gurgling noises so that acoustic energy is lost. It would also just heat up the room eventually, but I usually have a window open in winter so a tiny bit is lost that way.
Isn’t there also visible, non heating light coming off them.?
I think that light also becomes heat again once it strikes a surface
Mostly, but not entirely.
Most thing you struggle to approach anywhere near 100% efficient, heating is a bit easier in that you can get a lot closer, but you’ll still hit limits before reaching 100%.
Saying inefficiencies are lost as heat is really a lazy simplification, inefficiencies are lost as anything It just turns out that 95% of anything is heat, from entropies perspective.
My oil heater makes gurgling noises so that acoustic energy is lost. It would also just heat up the room eventually, but I usually have a window open in winter so a tiny bit is lost that way.
What about a combination heater/lamp where the lamp part is just incandescence