PHEV implementation about routee-compass

[nreinicke]

This also presents some difficulty with our existing implementation of applying an energy cost coefficient directly to the energy since the cost could be in variable units depending on the type of fuel being used. We could start by just converting the energy to a single unit (like converting gallons of gasoline to estimated equivalent kwh) but the best solution is probably to apply a $ value to each unit.

[robfitzgerald]

To implement this as a traversal model we could build a simple PHEV that would use the charge depleting RouteE Powertrain model until the battery ran out of energy and then switch to the charge sustaining model for the remainder of the trip

i dunno, does that really cover what happens in PHEVs? i mean, couldn't the charge sustaining model recharge the battery enough that the PHEV switches back to battery again later in the trip, perhaps multiple times? i think we want to get that right if we're going to model PHEV, otherwise it will miss out on the benefits of regenerative braking on long-distance trips. which, also btw, implies we want to capture regen from the powertrain model, so we want to be sure the models produce those kinds of outputs for downhill segments.

We would also need to define the battery capacity at the config level

that could be a query-time parameter along with initial SoC

this sounds like a challenge that might also have a few other surprises when we try and solve it. can you share your design here so we can iterate a little on it?

[nreinicke]

Yeah these are good points. I've shared my initial design in #33

[nreinicke]

Included in #33