Moisture management of the indoor air is critical for human’s thermal comfort and health. Recently, solid desiccant coated heat exchanger (DCHE) emerges as a promising dehumidification strategy compared to the conventional vapor compression-based air-dehumidification to reduce energy consumption. The coating material is one of the key components for high performance DCHE. In this study, different desiccants were synthesized and coated on metal foams for dehumidification. These coating materials can absorb more than 200% of moisture compared to its own weight, demonstrating higher moisture absorption capacity compared to the traditionally used silica gel. The coated metal foam can remove moisture from the air stream efficiently and regenerate at low temperature. Cyclic dehumidification and regeneration show that these coating materials are stable, and the dehumidification performance remained the same after multiple cycles. This study suggests these desiccant coated metal foams are promising for moisture management.

Desiccant coated heat exchanger for moisture management

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