A desiccant dehumidifier and a method, performed by a control device, for controlling a desiccant dehumidifier

A method, performed by a control device, for controlling a desiccant dehumidifier, the desiccant dehumidifier comprising:

• a desiccant rotor, which is rotatably arranged about a center axis of the desiccant rotor;
• a process air circuit arranged to conduct process air through a process sector of the desiccant rotor;
• a regeneration air circuit arranged to conduct regeneration air through a regeneration sector of the desiccant rotor;
• a fan arranged in the regeneration air circuit, downstream of the desiccant rotor, the fan being configured to generate a flow of regeneration air in the regeneration air circuit;
• and
• a heater device arranged in fluid communication with the regeneration air circuit upstream of the desiccant rotor, the method comprising the steps of:
• controlling the heater device to provide a substantially constant temperature of the regeneration air;
• and
• controlling the volume flow of regeneration air with the substantially constant temperature through the regeneration sector based on a predetermined target humidity in the regeneration sector of the desiccant rotor.

A desiccant dehumidifier comprising:

• a desiccant rotor, which is rotatably arranged about a center axis of the desiccant rotor;
• a process air circuit arranged to conduct process air through a process sector of the desiccant rotor;
• a regeneration air circuit arranged to conduct regeneration air through a regeneration sector of the desiccant rotor;
• a fan arranged in the regeneration air circuit downstream of the desiccant rotor, the fan being configured to generate a flow of regeneration air in the regeneration air circuit;
• a heater device arranged in fluid communication with the regeneration air circuit upstream of the desiccant rotor;
• and
• a control device configured to control the heater device to provide a substantially constant temperature of the regeneration air, and to control the volume flow of regeneration air through the regeneration sector based on a predetermined target humidity in the regeneration sector of the desiccant rotor.