"RichD" <r_delaney2001@[EMAIL PROTECTED]
> wrote in message
news:fc536e3e-6d54-45fc-a36a-31c432e32c58@[EMAIL PROTECTED]
| What is the efficiency of regenerative brakes?
|
|
| Let's say we have a 3000 lb. vehicle, traveling 30 mph.
| It hits a red lght. That's 1350000 lb-(mi/hr)^2
| kinetic energy, dissipated through the disc brakes.
|
| Now assume it's a Prius - how much is recovered
| into the batteries?
|
| I'm not looking for a theoretical discussion, just a
| number. Anybody know the number?
|
80%. Friction with air still causes some braking but most
of the KE is recovered and stored as useful energy to get
going again. Remember that no energy is required to continue
in a vacuum, so all the energy a car uses is wasted as heat
directly through the exhaust pipe and radiator and the rest
warms the atmosphere through friction.
