That would be a better location only if you didn't want the trunk contents to be climate controlled.
Having the cabin air exit through the center of the rear deck has the advantage of having climate controlled cabin air
circulate around the trunk contents before exiting to the exit portlets under both ends of the rear bumper cover.
...
This is interesting, but I doubt that any car manufacturer might worry too much about
trunk content.
In the case of hot air, if the car is not in motion, which is the majority of the case,
the hot air will accumulate on the top of the trunk, so there would be no air circulation.
I think that providing air circulation in the trunk might be an added safety protection in case someone get abducted
in the trunk. There is now a mandatory emergency release, but if the car is in motion, it would not
be safe to open the trunk, or the person might also be unconscious, or it's just a pet, so the opening would prevent
to not not suffocate, and protect the car maker from liability ?
And the air vent shown in the photo is truly anemic looking, even if there are two of them.
Are you sure it's not just a speaker grill?
It was just a picture that I found from the Internet to give a better idea of the location that I was thinking about.
I don't think there was any vent. About the black area, I think that you are right about been a speaker.
I noticed that the Ford Escape hybrid SUV had an opening for the battery on the left side.
I just assume that this was an exit for the hot air when parked, but it could have been the other way around
to get clean fresh air to the battery fan and then using a vent inside the rear bumper to release the hot air?
The Model 3 is designed with very nice airflow, something my wife and I demand ever since we had a Subaru with terribly anemic airflow.
As to having a trunk so full that the contents might block the airflow, you will see that even after cramming as much stuff as possible in there, there is still a little room at the top for air circulation. It doesn't take much. The shape of the top of the trunk pretty much ensures there will naturally be little gaps above the load. The only way it could be an issue is if the entire top of the trunk was stuffed with a soft, compressible item like a loose sleeping bag or clothing. I recommend that be avoided anyway for a number of reasons.
I wonder then how work then the
air re-circulation in a car? If I follow your explanation,
the air should flow from the back of the car, or from the trunk, and then go back to the front,
to pass through the AC to remove the moister, and the heater if needed.
You would need an air duck in this case from the trunk to the front of the cabin?
In the case of the Model 3, I noticed some air vents under the front seats.
I wonder if those vents are not used for the air re-circulation, since there is no foot air control for the air passengers,
only the air vents on the middle console where the two USB plugs are located.
But there must still be a mix of outside fresh air to avoid high concentration of CO2.