3 ms·
They might have other objective functions like wear-and-tear on the elevators, total energy usage, or something
by neutronicus 2mo ago
They might have other objective functions like wear-and-tear on the elevators, total energy usage, or something
- dbcurtis 2mo agoIt's pretty much throughput. The cap-ex of a single cab swamps any other cost, so the only way to reduce total number of cabs is optimizing for throughput.
- cyberax 2mo agoModern elevators have regen braking, so they can recover most of the energy spent on going down. Older elevators used braking resistors for that. (BTW, going _down_ while empty is typically more energy-consuming for the elevators because they are counterweighted) Edit: that's also why you shouldn't use elevators in a fire. If the brakes in the elevator machine room fail, the cab won't crash down. It will go _up_, possibly dragging you into the fire. Many firefighters died because of that.
- fragmede 2mo agoInteresting! It's counterbalanced though, so why does it go up if the brakes fail in a fire? That's counterintuitive.
- ImPostingOnHN 2mo agoMaybe it needs to be counterbalanced at maximum approved elevator+load weight?