Journal
ENERGY CONVERSION AND MANAGEMENT
Volume 188, Issue -, Pages 438-446Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.enconman.2019.03.058
Keywords
Direct methanol fuel cell; Flow-field design; Non-uniformity
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Funding
- National Natural Science Foundation of China [51505136, 11402084]
- Natural Science Foundation of Hunan Province [2017JJ3018, 2015JJ3051]
- China Scholarship Council [201806135023]
- open fund of State Key Laboratory of Fluid Power & Mechatronics Systems [GZKF-201615]
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Non-uniform cross-sectional designs of serpentine channel in direct methanol fuel cells are systematically studied in the present work. A parametric design is proposed to describe and classify channel geometries whose effects on cell performance are numerically and experimentally analyzed. Numerical results show that the non-uniform converging designs are beneficial for both in- and through-plane methanol transportations, and thus to enhance the peak power generation performance as much as 12% at high-current-density operations. Effectiveness of non-uniform designs for power generation enhancements is also validated by experimental studies which consider various operating conditions, and significant enhancement of power generation (18.4%) is noticed by the usage of non-uniform converging design. Optimal application conditions for the non-uniform converging designs are determined to be the high-current-density operations with high temperatures.
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