Abstract: A heat and mass exchanger system is described. The heat and mass exchange system can include a plurality of exchange components extending across a heat and mass exchanger (HMX) duct, where a flow through the HMX duct is cross-flow relative to said exchange components. The exchange components can include a plurality of first elongated, hollow conduits and a plurality of second elongated, hollow conduit, where either the first elongated, hollow conduits or the second elongated, hollow conduits have water vapor permeable exterior walls, and a carrier air stream and a liquid desiccant stream flow in contact with opposite sides of the water vapor permeable exterior walls.

Abstract: A liquid desiccant regeneration system and method of liquid desiccant regeneration are described. The liquid desiccant regeneration system includes a liquid desiccant regenerator having an engine producing a heated exit stream, and at least one dehydrating tube comprising a first water vapor permeable wall. A low concentration liquid desiccant stream feeds into the liquid desiccant regenerator, while a high concentration liquid desiccant stream exiting the liquid desiccant regenerator. A carrier stream and the low concentration liquid desiccant are in contact with opposite sides of the first water vapor permeable wall, and the low concentration liquid desiccant stream is heated by heat from the heated exit stream to drive water from the low concentration liquid desiccant stream through the first water vapor permeable wall to the carrier stream to form a humidified carrier stream.