the cars structure and chassis are going to produce a natural flat underside. so it's basically i big duct from the front to the back... i remember someone here was thinking about ducting high pressure air from the front to the rear to reduce the wake... this might be just that...
the chassis seems to be pretty clean and jugeing from the front and rear views it would seem like the car is actually quite high above the ground but looks lower because of the integrated sideskits. the rear defuser has something that looks a lot like a spoiler too.
one thing i can't see is the windshield wiper... so i suppose that's what the cowl might be for... most cars seem to have this these days, although the prototype doesn't seem to have anything at all in the spot.
this car has a lot in common with the opel eco speedster wich i've just discovered has a single wiper blade that's oddly parked vertical in the center of the windshield. interestingly
this picture shows the loremo with the same arrangement... also the mirrors seem to be arranged more like the eco speedster.might be an early design stage or speculative sketch though... overall shape is different too...