According to the leaks in this article, the Model 3 will not use traditional radiators and heat exchangers since they cause high drag. It sounds like they will use the front "nose cone" area as a heat exchange surface. Perhaps there will be liquid cooling channels milled into the back surface of these surfaces to allow hot coolant to be cooled. Here are a couple of bullet points for discussion.
- There may be radiators in the rear bumper for auxilliary cooling during supercharging
- The air conditioner needs its own heat exchanger (rear also?)
- Will there be an auxiliary air inlet in the front that can open during high demand?
- Will it be dangerous to have a hot bumper? How hot could the bumper be?
- What is the energy and noise penalty for using fans vs ram air for the AC at highway speed?
- Can this method actually provide enough cooling?
- Will paint color have an impact on powertrain cooling due to solar heating and emissivity differences?