3 ms·
The important question is how much energy do they need to put in to get the result. The goal can be machined aluminum or car at destination. For lots of process
by ianburrell 3y ago
The important question is how much energy do they need to put in to get the result. The goal can be machined aluminum or car at destination. For lots of processes, the output energy, like moving car or shining light, is important and the goal. Higher efficiency means can put in less energy and get the same result.
Light ends up as heat, but LEDs are more efficient cause they don’t produce extra heat. Electric motors are more efficient than combustion ones so electric cars end up going farther for same input.
- zokier 3y agoSure, it is reasoably easy to say that A is more efficient than B, and even quantify how much energy A saves in comparison to B. But that is only a relative measure; it is far less obvious how you'd quantify the waste in absolute terms like the chart in question here seems to do? To do so you'd need to know some theoretical ideal minimum energy process that would get some equivalent end result as a reference point, but that seems wildly infeasible to estimate