Staged regenerated liquid desiccant dehumidification systems

A system, comprising:

• a liquid desiccant regeneration system including:
• a first liquid desiccant stage that outputs a first stream of liquid desiccant at a first concentration;
• and
• a second liquid desiccant stage that outputs a second stream of liquid desiccant at a second concentration different from the first concentration;
• an air contactor system including:
• a first air contactor stage configured to dispose a first input air stream having a first water content by percent mass in contact with the first stream of liquid desiccant to form (1) a first output air stream having a second water content by percent mass that is lower than the first water content, and (2) a first diluted liquid desiccant stream, the first diluted liquid desiccant stream being circulated back into the liquid desiccant regeneration system;
• and
• a second air contactor stage configured to dispose a second input air stream having a third water content by percent mass in contact with the second stream of liquid desiccant to form (1) a second output air stream having a fourth water content by percent mass that is lower than the third water content, and (2) a second diluted liquid desiccant stream, the second diluted liquid desiccant stream being circulated back into the liquid desiccant regeneration system;
• a supply airflow path configured to flow the first input air stream to the air contactor system;
• and
• a heat exchanger thermally coupled to the supply airflow path and configured to remove heat from the first input air stream upstream of the air contactor system.