Excellent, looks like we’re finally on the path to the turbolifts from Star Trek !
I was thinking more along the line of Willy Wonka's glass elevators :p
ThyssenKrupp Multi – world’s first rope-free elevator [video]
121–130 of 208 posts
Re: ThyssenKrupp Multi – world’s first rope-free elevator [video]
#122The big benefit is that you get more than one elevator per shaft. For skyscrapers the amount of floor space wasted by elevators grows exponentially by the number of floors. Say you have a 5 story building that needs a one shaft elevator. 5 floors tiles 100 sqft per floor is 500 sqft of wasted shaft space. Then say you have a 10 story building that needs two shafts. Now you are wasting 10 floors times two shafts or 2,…
Perhaps you could just hang two elevators on one set of cables in the same shaft? They will have to move in sync and the range will be cut in half, but the throughput will nearly double during the rush hour. In a tall building could be an acceptable tradeoff.
Re: ThyssenKrupp Multi – world’s first rope-free elevator [video]
#123Schedulers for Multi must be fun - I'm sure they must have employed a whole research group for solving this problem. Scheduling simple elavator systems is still a problem nowadays, this one? It's so much harder.
Sounds like it'd be a fun game
http://play.elevatorsaga.com/
There you go. Lost so many hours playing this game though.
Re: ThyssenKrupp Multi – world’s first rope-free elevator [video]
#124Poor choice of title. It may be the first direct-drive or non-linear elevator, but rope and cable-free hydraulic elevators have been in service for decades.
Re: ThyssenKrupp Multi – world’s first rope-free elevator [video]
#125Earlier quoted context omitted.
Sorry to sound stupid, but how is that exponential? Isn't it O(mn) where m = number of floors and n = number of shafts? EDIT: Unless there's some dependence between m and n, like if taller buildings always need more shafts or something.
> like if taller buildings always need more shafts or something The dependence is on keeping wait times reasonable. Taller buildings mean each shaft's elevator spends more time travelling, i.e. less time being available.
There's also a weight issue. The longer the shaft, the longer and heavier the cable must be, and the more tension and stretch. In some buildings, there may also be structural issues militating against an open shaft running the entire heightof the buldng.
Re: ThyssenKrupp Multi – world’s first rope-free elevator [video]
#126Earlier quoted context omitted.
That's Otis's original safety elevator, and it was a rope system. The innovation was that it had a mechanism to stop it if the rope broke.
Ah, thanks for the clarification...the animation made it look like it was the gear system that was controlling the movement.
The animation is a redraw of this picture.[1] It's one of the most famous demos in history.
Re: ThyssenKrupp Multi – world’s first rope-free elevator [video]
#127The big benefit is that you get more than one elevator per shaft. For skyscrapers the amount of floor space wasted by elevators grows exponentially by the number of floors. Say you have a 5 story building that needs a one shaft elevator. 5 floors tiles 100 sqft per floor is 500 sqft of wasted shaft space. Then say you have a 10 story building that needs two shafts. Now you are wasting 10 floors times two shafts or 2,…
Perhaps you could just hang two elevators on one set of cables in the same shaft? They will have to move in sync and the range will be cut in half, but the throughput will nearly double during the rush hour. In a tall building could be an acceptable tradeoff.
That makes it a lot harder to have a dramatic lobby, which is an important component of most skyscrapers.
Re: ThyssenKrupp Multi – world’s first rope-free elevator [video]
#128Earlier quoted context omitted.
That means that all cars must traverse the entire distance and that all cars must wait each time a car reaches a floor.
> That means that all cars must traverse the entire distance with a lot of cars in uni-directional shafts, is this really an issue? > all cars must wait each time a car reaches a floor maybe solved by a 2-lane shaft with a passing lane. very doable with rails or towing cars.
How can you have multiple cars in a single shaft, using the rope system? To what would the second car from the ceiling be hanging on?
Re: ThyssenKrupp Multi – world’s first rope-free elevator [video]
#129I hate to be so cynical, but for how often the TK elevator in our building is out of service (these things have been around for 100 years and still break down more than a Fiat), I don't have the confidence necessary to step foot in this thing.
Came to post a similar comment. Of course it's anecdotal, but in our old building we had a +20 years old Schindler's lift (yes that sounds very close to Schindler's List, the joke is never far away) and in the 5 years I was there I never saw them failing. In a new building no single month passes by without one of the TK elevators needing servicing, at worst multiple times a week. And if they're in service there are s…
My previous workplace had a couple of Schindlers, which failed multiple times per year.
Re: ThyssenKrupp Multi – world’s first rope-free elevator [video]
#130Am I the only one who noticed that the first elevator shown in the video, while the narrator discussed the birth of the elevator in 1854, is gear-based and hence rope-free?!
That's Otis's original safety elevator, and it was a rope system. The innovation was that it had a mechanism to stop it if the rope broke.
Good to know. I saw the animation as a snipe at roped elevators, freezeframing just as the elevator fails and goes into freefall. It makes more sense knowing the history.