Rules and Guidelines
Want to participate in the discussions? Please read our Community Rules and Guidelines. Need some help? Visit Support and Answers.

  • State Not Answered
  • Locked Locked
  • Replies 13 replies
  • Subscribers 32 subscribers
  • Views 1236 views
  • Users 0 members are here
Options
You may also be interested in
This discussion has been locked.
You can no longer post new replies to this discussion. If you have a question you can start a new discussion

Overhead Catenary Cables to Charge Electric Lorries.

Zoomup
So, what do readers think of this idea?  Surely those large pantographs cause high wind resistance? Perhaps if the lorries were put on steel rails they would be self steering and free up the roads.


From the Beeb. 

https://www.bbc.co.uk/news/av/stories-50223895/could-electric-roads-spark-a-green-transport-revolution


.
Parents
  • 0
    well on heavily used routes to  charge on board batteries provide and traction current without having to stop, maybe. But there is far more height variation in lorries than there is in trains, and on a busy road, you'd need a lot more power stations per km than you do on a railway. 

    A loaded train may be half a dozen megawatts, and on average there will be a few km  between them, while on the M25 for example , each truck would be no more than  100m from the next, probably quite a bit less, and motor size of perhaps 10kW per tonne of GMW. So even for small lorries like 7.5 tonnes, we might think of 70-80kW, and upto half a megawatt for the 44 tonne artics - and that assumes just traction, not charging up the on board batteries at the same time. Even if we dare re-use the train voltage of 25kV RMS, we would have  a lot of amps to think of.
Reply
  • 0
    well on heavily used routes to  charge on board batteries provide and traction current without having to stop, maybe. But there is far more height variation in lorries than there is in trains, and on a busy road, you'd need a lot more power stations per km than you do on a railway. 

    A loaded train may be half a dozen megawatts, and on average there will be a few km  between them, while on the M25 for example , each truck would be no more than  100m from the next, probably quite a bit less, and motor size of perhaps 10kW per tonne of GMW. So even for small lorries like 7.5 tonnes, we might think of 70-80kW, and upto half a megawatt for the 44 tonne artics - and that assumes just traction, not charging up the on board batteries at the same time. Even if we dare re-use the train voltage of 25kV RMS, we would have  a lot of amps to think of.
Children
No Data

Community Rules & Guidelines