The function of the air-conditioning system is to reduce the temperature inside the passenger compartment to a level that ensures passenger comfort.
It achieves this by removing excess heat and transferring it to the outside of the vehicle.
The removal of heat lowers the temperature and the vehicle interior becomes colder.
‘Cold’ is simply a relative absence of heat, or can be regarded as a condition which exists after heat has been removed.
Heat always travels from a hotter object to a colder object.
This heat transfer can take place by one of three methods: Conduction, Convection or Radiation.
Conduction is heat transfer by direct contact.
Convection is the transfer of heat by circulation of convection currents in a gas or liquid.
Radiation transfers heat in rays.
