Wait a minute, why is this not used as AC in cars???
Ammonia is bad for health in case of a crash?
With a setup like this you would have virtually free unlimited AC in the car. You could also use it on the peltiers as previously described.
Edit:
It appears feasible.
http://www.sciencedirect.com/science...76610211014652
But it seems it is not convenient for most people as they would rather have instant cold.
If I were living somewhere tropical or where it is hot all the time, i would definitely be looking at installing something like this on a car.