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Table 6.1: Table of membrane dimensions and values for parameters used in our model. Membrane dimensions Nt L Tube ID Tube OD lm Shell ID Model parameters Cpa Cpw km μa ρa Tref Dwa 7000 0.726 m 0.97 mm 1.1 mm 0.13 mm 152 mm 1010 J/Kg K 4180 J/Kg K 0.15 W/m s 1.86 Kg/m s 1.185 Kg/m3 298 K 2.64x10−4 m2/s To generate a feed stream, compressed laboratory air was fed to a packed drip column in which the water temperature was controlled through the use of a heat exchanger. Next the stream passed through a filter to remove any condensate ensuring that only water vapor exists before being heated to room temperature via an electrical resistance heater. The relative humidities of each experiment were produced by varying the temperature of the water in the drip column. Before entering the tube side of the membrane module, the flow rate, temperature, relative humidity, and pressure were measured using a venturi meter, thermocouple, Vaisala RH meter, and a digital pressure gauge. As the stream exited the tubes of the membrane, the relative humidity and temperature were measured once again by using a Vaisala RH meter. Feed streams were generated at varying relative humidities. Before the gas stream could enter the shell side, it passed through a desiccant bed of 5A zeolite to remove as much water as possible. The desiccant was regenerated before each experiment by being heated in an oven under vacuum overnight. To determine the relative humidity and temperature of the purge gas, a Panametrics 106PDF Image | TEMPERATURE SWING ADSORPTION COMPRESSION AND MEMBRANE SEPARATIONS
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