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Abstract
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In this study a hollow fiber membrane contactor system with co-current
flow configuration was proposed. Two different hollow fiber membranes
made of Polyethersulfone (PES) and Polycarbonate (PC) were produced
and their humidification performance for use in air conditioning systems
was investigated. For different inlet air dry bulb temperature (25°C, 30°C,
35°C) and relative humidity (20%, 30%, and 40%), the behavior of the
membrane system was experimentally studied. The effect of various inlet
conditions on the outlet air dry bulb temperature, water vapor flux and
cooling capacity of the system for two different hollow fiber membranes
were studied. The results showed that the outlet air temperature, water
vapor flux and maximum cooling capacity of PES membranes were about
19 °C, 0.007 mol/m2.s and 1.2 W, respectively which is higher than PC
membranes because of its higher surface porosity and having superior
membrane structure. The final outcome of the experiments further showed
that by increasing the entrance air temperature at constant air relative humidity,
water vapor flux increased.
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