Abstract
Besides air-to-air exchangers, parallel-plate membrane ducts have been extensively used in liquid-to-air heat and mass exchangers (membrane contactors). The plate membranes are stacked together to form a parallel-plate membrane structure. A specific example is the membrane contactor used for liquid solution air dehumidification. In two neighboring membrane ducts, one fluid is solution, and the other is moist air. Moisture in the air stream permeates through the membrane and is absorbed by the solution. Heat is released on the membrane surfaces. Fluid flow and heat and mass transfer between the two streams are investigated together with heat and mass conduction in membranes. The boundary values on membrane duct walls are calculated. The consequent Nusselt and Sherwood numbers are obtained for the ducts. The Nusselt and Sherwood numbers can also be used in other membrane contactors of the parallel-plate type.
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