Experimental verification of a membrane humidifier model based on the effectiveness method |
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Authors: | David Kadylak |
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Affiliation: | a Clean Energy Research Centre, University of British Columbia, Vancouver, BC, Canada V6T 1Z4 b Institute for Fuel Cell Innovation, 4250 Wesbrook Mall, Vancouver, BC, Canada V6T 1W5 |
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Abstract: | Experiments conducted on a commercial fuel cell humidifier determined that the water recovery ratio is the best performance metric because it considers the water supplied to the humidifier. Data from a porous polymer membrane with a hydrophilic additive were analyzed under a heat and mass transfer model. The membrane showed low water uptake profiles at relative humidities below 80 percent, and a steep increase in water uptake above threshold.The experiments were conducted with samples of the porous membrane in a single cell humidifier at isothermal conditions at temperatures of 25, 50, and 75 °C. The water recovery ratio for the porous membrane decreased with increasing flow rate.The model was verified experimentally and its predictions agreed with the measured data. |
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Keywords: | AFM atomic force microscopy ERV energy recovery ventilator FTIR Fourier transform infrared HVAC heating ventilating and air conditioning MEA membrane electrode assembly PEM proton exchange membrane PEMFC proton exchange membrane fuel cell PFSA perfluorosulfonic acid (i e Nafion&trade ) PTFE polytetrafluoroethylene (i e Teflon&trade ) |
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