|
|
| Re: coldest stations to be at this heatwave (1403122) | |||
 |
|||
| Home > SubChat | |||
|
[ Read Responses | Post a New Response | Return to the Index ] |
|
||
|
Re: coldest stations to be at this heatwave |
|
|
Posted by Steamdriven on Sun Jul 24 13:29:56 2016, in response to Re: coldest stations to be at this heatwave, posted by AlM on Sun Jul 24 11:24:52 2016. That's a lotta complexity to capture DC current. Since I'm not an EE, there are probably elements I don't see here. But:Why not tie the DC from block to block, into a net of sufficient size that there is usually a train drawing power when one is braking? With modern DC-DC voltage convertors, you could have, say, a 13KV DC bus a few miles long, supplying multiple traction power substations. Excess power from one block while 750 tons of train is braking can thus be shuttled a modest distance to another train demanding it. Why can't the old rolling stock do regen? Just use DC motors to put DC back on the rail?? There are probably more physical issues involved than I'm aware of, or it could be total lack of ambition on MTA's part. Back-of-the-napkin says there's a hundred million watts going to waste at any moment during the weekday in this way. |
|
|
|