On 08/02/2019 16:51, Jeremy Double wrote:
Bevan Price wrote:
On 08/02/19 4:14, Recliner wrote:
The DfT remains consistent in its dislike of OHLE

https://www.thetimes.co.uk/article/battery-powered-trams-to-beat-congestion-pzz3p9jk3?shareToken=d7efc8230f20d995b8ea4bff5daae 175



As usual, the incompetent DfT only thinks about short term costs of
initial construction, not the long term running / operating costs.

Batteries have a finite life. You can recharge them, but they eventually
deteriorate, hold less charge, and have to be replaced - and they are
not cheap to replace.

Moreover, you use additional energy to convey the weight of the
batteries on every journey, instead of getting energy from fixed
overhead wires to move a vehicle that is lighter due to the absence of
batteries.

And before anyone suggests fuel cells, they also have finite lives, and
to function, they often rely on the presence of rare, expensive,
precious metals (platinum, palladium, rhodium, etc.)

There are recycling processes for catalysts containing all of those
precious metals. Except in very small quantities they are too precious to
throw away.


There was a claim that sweeping the main roads and processing the dirt
would be more effective than mining for the rare elements used in
catalytic converters as the percentage it contained was higher than in
the crude ore dug from the ground.

--
Graeme Wall
This account not read.