If a machine is never 100% efficient transforming energy into work because part of the energy is converted into heat, does it mean an electric heater is 100% efficient? @[email protected]
If a machine is never 100% efficient transforming energy into work because part of the energy is converted into heat, does it mean an electric heater is 100% efficient? @[email protected]
Black-body radiation is an interesting argument against 100% efficiency, but couldn’t you just extrapolate and argue that the emission will be converted back to heat once it stops reflecting and becomes absorbed?
That’s like arguing that trickle down economics is efficient because the money eventually gets into the hands of the poor.
That’s like arguing that 99% of the light off a heating element is a laser beam directed straight into deep space.
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It depends on what you consider the room: Both a light bulb and a bomb would deliver all their energy around a fully enclosed room. Incandescent bulbs are indeed effective heaters, LEDs just deliver much less energy. And a bomb, by design, is hard to contain in a room.