Its basically an absorbtion fridge.....you would use the heat from the engine cooling system to power the charge cooling system.....you'd have the heat pipe system charged with amonia and site an evaporator the the induction air stream.....

Caravan fridges use absorbtion to enable you to have 2 sources of heat....LPG or an electric heater element 12V or 240V when you hook up.....

Is that right Nick?