A cold dryer is a type of refrigerated air dryer used to remove moisture from compressed air. The heat load of the evaporator is the amount of heat that is absorbed by the evaporator coil during the refrigeration cycle. The components that contribute to the heat load of the evaporator in a cold dryer include:

Moisture in the compressed air: The moisture in the compressed air is removed by the cold dryer through condensation. The heat of vaporization of the moisture in the compressed air contributes to the heat load of the evaporator.

Temperature of the compressed air: The temperature of the compressed air entering the evaporator affects the heat load of the evaporator. The higher the temperature of the compressed air, the higher the heat load of the evaporator.

Airflow rate: The airflow rate through the evaporator affects the heat load of the evaporator. The higher the airflow rate, the higher the heat load of the evaporator.

Pressure of the compressed air: The pressure of the compressed air affects the heat load of the evaporator. The higher the pressure of the compressed air, the higher the heat load of the evaporator.

Heat transfer rate: The efficiency of the heat transfer between the compressed air and the evaporator coil affects the heat load of the evaporator. The lower the efficiency of the heat transfer, the higher the heat load of the evaporator.