|
|
| Re: LIRR to test retrofitting M7s to run off batteries (1574001) | |||
 |
|||
| Home > SubChat | |||
|
[ Read Responses | Post a New Response | Return to the Index ] |
|
||
|
Re: LIRR to test retrofitting M7s to run off batteries |
|
|
Posted by pragmatist on Thu Apr 22 14:02:33 2021, in response to Re: LIRR to test retrofitting M7s to run off batteries, posted by AlM on Thu Apr 22 12:24:27 2021. actually, it doesn't cost out as badly as one would expect since it avoids the cost of providing power to meet peak demand only, which tends to be dirtier and more expensive. If you avoid having to build a peaker plant, and beef up grid connections for it by assuring grid stability in a given area, it is actually surprisingly economical. The buses will be cycled (discharge/charge) twice a day typically on a schoolday, occasional cycling only when needed should not be frequent enough to seriously impact lifespan, but the real world will determine how true that is.There is an enormous amount of discussion about utility scale energy storage, it is critical to widespread adaptation of renewable energy, the doesn't always shine (especially at night) and the wind doesn't always blow. Coupled with hydro, you may see pumped storage, like Lewiston (next to Niagara Falls) or Blenheim Gilboa. Energy not being used (typically at night) is used to fill a reservoir, and the water is used for power when demand is higher. It is a slight net loss in energy, since the energy used to move the water plus the losses in friction and resistance in dropping it to generate will always be greater than what you can generate, but the power to fill or pump would otherwise be wasted so you have a major gain in usable power without building another polluting plant somewhwhere. |
|
|
|