کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4990990 | 1457109 | 2017 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Evaluation of performance enhancement by condensing the anode moisture in a proton exchange membrane fuel cell stack
ترجمه فارسی عنوان
ارزیابی افزایش عملکرد با تغییر دادن رطوبت آند در یک پشته سلول سوخت سلولی غشایی پروتون تبادل
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کلمات کلیدی
سلول سوختی غشای تبادل پروتون، مدیریت آب، آنود، مرطوب، یخچال،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
جریان سیال و فرایندهای انتقال
چکیده انگلیسی
Water management is an important issue for proton exchange membrane fuel cells. Back-diffusion of water from cathode to anode often occurs due to the differences in concentration and pressure during operation of fuel cell, resulting in the flooding and severe carbon corrosion in the cathode. Herein, we report a novel method of anode moisture condensing (AMC) in which a condenser is set at the outlet of the anode to cool down the anode moisture. With the help of AMC, liquid water is condensed from the moisture due to the variation of the saturated pressure of water vapor, which can accelerate the evaporating of the liquid water inside the anode and mitigate the probability of water flooding. A ten-cell stack with a condenser at the outlet of the anode is fabricated to systematically investigate the effects of the stack temperature and flow rate on the stack performance. The result shows that the PEMFC performance can be greatly improved at high current density and high operation temperature under the condition of AMC. The stack exhibits very similar performance before and after application of AMC below 500 mA cmâ2, whereas the output power increases from 405 W to 436 W at 600 mA cmâ2 at 65 °C. With further increase in operation temperature to 80 °C, the average voltage increases from 0.598 V to 0.641 V even at 500 mA cmâ2. Moreover, the application of AMC can speed up the water evaporation, leading to the dehydration of the membrane and thus poor performance of PEMFC at low current density.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Thermal Engineering - Volume 120, 25 June 2017, Pages 115-120
Journal: Applied Thermal Engineering - Volume 120, 25 June 2017, Pages 115-120
نویسندگان
Shouzhen Zhang, Ben Chen, Peng Shu, Maji Luo, Changjun Xie, Shuhai Quan, Zhengkai Tu, Yi Yu,