5 ms·
The bus is constantly starting and stopping. Regen doesn't recapture it all. Power isn't the issue, energy is. Also, current hybrid busses with not-so-heavy ba
by 7e 1y ago
The bus is constantly starting and stopping. Regen doesn't recapture it all. Power isn't the issue, energy is.
Also, current hybrid busses with not-so-heavy batteries weigh about 15 tons without cargo. You are way off.
- londons_explore 1y agoThis math is for future busses designed for city use - so batteries will be much smaller and therefore lighter, and the bus construction itself will be much lighter because, as you point out, with a city bus pulling away ~5 million times in its lifespan, the cost of energy lost when stopping and pulling away far exceeds the cost of upgrading the frame to aluminium and other weight saving measures.
- eptcyka 1y agoBuses have been designed for city use for ages. The double deckers are not designed for motorway use.
- adrian_b 1y agoRegen can capture during stopping most of the energy consumed during starting, if well designed, while in a non-electric bus all energy is lost. The mass of the bus does not matter, only the energy lost due to mechanical friction or electrical resistance, both of which increase much more slowly than the mass for bigger buses.