Arthur Besse@lemmy.ml to Trains@lemmy.mlEnglish · 2 days agoTwo photos of the same train driver, taken 26 years apartlemmy.mlimagemessage-square62fedilinkarrow-up1321arrow-down18file-text
arrow-up1313arrow-down1imageTwo photos of the same train driver, taken 26 years apartlemmy.mlArthur Besse@lemmy.ml to Trains@lemmy.mlEnglish · 2 days agomessage-square62fedilinkfile-text
The two trains pictured: https://en.wikipedia.org/wiki/China_Railways_SY https://en.wikipedia.org/wiki/Fuxing_(train) More info about (and photos of) the driver, Han Junjia: https://global.chinadaily.com.cn/a/202012/28/WS5fe93034a31024ad0ba9ed9b.html http://en.people.cn/n3/2018/1205/c90000-9525433.html
minus-squareLeft as Center@jlai.lulinkfedilinkEnglisharrow-up1·2 days agoIt’s correct though. ICE efficiency in a car ~ 20% for a car, gas to wheels. Worst case scenario : diesel running to generate electricity (the engine stays at its efficient point): 45-50% battery efficiency to charge 85% battery to movement efficiency ~85% Electric cycle efficiency : ~33% You need to add ~15% overweight for EV, making a conservative 28% total cycle efficiency. It is definitely the energy density which makes the difference.
It’s correct though.
ICE efficiency in a car ~ 20% for a car, gas to wheels.
Worst case scenario :
Electric cycle efficiency : ~33%
You need to add ~15% overweight for EV, making a conservative 28% total cycle efficiency.
It is definitely the energy density which makes the difference.