3 ms·
I mean, this is good news, but why was the efficiency of the system so misunderstood at the design phase? I hope someone's interested enough to find out!
by skrap 2y ago
I mean, this is good news, but why was the efficiency of the system so misunderstood at the design phase? I hope someone's interested enough to find out!
- crocal 2y agoAhoi! Participated to the development of a simulation tool for that purpose. Many factors need to be taken into account: - The gradients of the track - How agressively you want to drive at different time of the day - How many trains - The timing of the trains. When one train brakes, it can power another one that accelerates at the same moment - The efficiency of the power chain - The resistance model of the train With so many parameters the results can be quite volatile. However, rule of the thumb in the business is that 30% saving can be achieved with good energy management. Hope this clarifies a little. Update: bullet points
- skrap 2y agoInteresting! Thanks for the great info. Do you know if anyone will have the opportunity to integrate observations into the model so it can continue to improve?
- crocal 2y agoWe did use actual data from existing lines to measure the gap between our models and reality. We were +/- 5% accurate.
- djaychela 2y agoMaybe they didn't factor in ridership on certain part of the track gradient, which would lead to more regen braking than expected?