View Single Post
Old 09-14-2015, 12:43 PM   #2 (permalink)
Master EcoModder
NeilBlanchard's Avatar
Join Date: May 2008
Location: Maynard, MA Eaarth
Posts: 7,870

Mica Blue - '05 Scion xA RS 2.0
Team Toyota
90 day: 42.48 mpg (US)

Forest - '15 Nissan Leaf S
Team Nissan
90 day: 156.46 mpg (US)

Number 7 - '15 VW e-Golf SEL
90 day: 155.81 mpg (US)
Thanks: 3,383
Thanked 2,876 Times in 1,809 Posts
One of the dirty secrets of FCEV's is they are quite intolerant of heat. And while they are more efficient than an ICE (which is damning with faint praise!), they are a lot less efficient than EV's. So, the heat they generate has to be shed much more effectively than we are used to.

I am not remembering the temperature limit for FCEV's, but it is surprisingly low - and this requires the very large cooling intakes on the Mirai.

So, the aero penalty for cooling on ICE's is roughly 10% (if I remember correctly), and it would be higher for FCEV's.
Sincerely, Neil
  Reply With Quote
The Following User Says Thank You to NeilBlanchard For This Useful Post:
aerohead (09-14-2015)