I found that there are several type of heating element in a hair dryer, but basically I mainly classify them into two ways of heat transfer: Radiation and Conduction.
The conventional hair dryer uses heating wire to heat up the air around it. Then the hot air is blown to the hair by the motor. I classify this type of heat as conduction heating.
Another kind of hair dryer uses ceramic heater, which transfer the heat by infrared radiation. They type of hair dryer also has motor and fan to blow air to the hair.
I would like to ask which type of heat transfer is more efficient for drying the hair (or evaporate the water)? Assuming the air flowing rate is the same.