let's hear your idea then

a chargecooler just means a heat exchanger device to cool the air charge going to the engine

an intercooler is a chargecooler - an air to air one

what is normally called a chargecooler is a water to air one. i.e. you have a heat exchanger that the charge air goes through encased in a water jacket and the heat in the air is passed to the water which is then pumped around a circuit to be given out from a radiator

i can't see how a fan would come into that?

by the way, regarding using a/c to cool the charge air - at best with an automotive a/c system you will have a COP of 2. that means that however much cooling you need, you have to put in twice the energy to get it