How is a psychrometric chart used in drying calculations?

The psychrometric chart relates air properties: dry-bulb temperature, wet-bulb temperature, humidity, relative humidity, enthalpy, and specific volume. For drying: follow the adiabatic saturation line (constant wet-bulb) from inlet air conditions toward saturation - the air cools while picking up moisture. Chart calculations determine air flow rate required, outlet conditions, and dryer efficiency. It is also essential for cooling tower and air conditioning design.