TY - GEN
T1 - Heat and mass transfer and two phase flow in hydrogen proton exchange membrane fuel cells and direct methanol fuel cells
AU - Guo, Hang
AU - Ma, Chong Fang
AU - Wang, Mao Hai
AU - Yu, Jian
AU - Liu, Xuan
AU - Ye, Fang
AU - Wang, Chao Yang
N1 - Funding Information:
This work was supported by National Nature Science Foundation of China (Grant No.: 50236010, 50028605), Nature Science Foundation of Beijing (Grant No.: 3992002) and Youthful Researcher Foundation of Beijing University of Technology (Grant No.: Z05040201). The authors are also grateful to Senior engineer Dao Heng LEI and Ms. Yan WANG (Beijing University of Technology, CHINA) for the cooperation and helpful discussions.
Publisher Copyright:
Copyright © 2003 by ASME.
PY - 2003
Y1 - 2003
N2 - Fuel cells are related to a number of scientific and engineering disciplines, which include electrochemistry, catalysis, membrane science and engineering, heat and mass transfer, thermodynamics and so on. Several thermophysical phenomena such as heat transfer, multicomponent transport and two phase flow play significant roles in hydrogen proton exchange membrane fuel cells and direct methanol fuel cells based on solid polymer electrolyte membrane. Some coupled thermophysical issues are bottleneck in process of scale-up of direct methanol fuel cells and hydrogen proton exchange membrane fuel cells. In present paper, experimental results of visualization of condensed water in fuel cell cathode microchannels are presented. The equivalent diameter of the rectangular channel is 0.8mm. Water droplets from the order of 0.08mm to 0.8mm were observed from several different locations in the channels. Several important problems, such as generation and change characteristics of water droplet and gas bubble, two phase flow under chemical reaction conditions, mass transfer enhancement of oxygen in the cathode porous media layer, heat transfer enhancement and high efficiency cooling system of proton exchange membrane fuel cells stack, etc., are discussed.
AB - Fuel cells are related to a number of scientific and engineering disciplines, which include electrochemistry, catalysis, membrane science and engineering, heat and mass transfer, thermodynamics and so on. Several thermophysical phenomena such as heat transfer, multicomponent transport and two phase flow play significant roles in hydrogen proton exchange membrane fuel cells and direct methanol fuel cells based on solid polymer electrolyte membrane. Some coupled thermophysical issues are bottleneck in process of scale-up of direct methanol fuel cells and hydrogen proton exchange membrane fuel cells. In present paper, experimental results of visualization of condensed water in fuel cell cathode microchannels are presented. The equivalent diameter of the rectangular channel is 0.8mm. Water droplets from the order of 0.08mm to 0.8mm were observed from several different locations in the channels. Several important problems, such as generation and change characteristics of water droplet and gas bubble, two phase flow under chemical reaction conditions, mass transfer enhancement of oxygen in the cathode porous media layer, heat transfer enhancement and high efficiency cooling system of proton exchange membrane fuel cells stack, etc., are discussed.
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U2 - 10.1115/fuelcell2003-1755
DO - 10.1115/fuelcell2003-1755
M3 - Conference contribution
AN - SCOPUS:1242309959
SN - 0791836681
SN - 9780791836682
T3 - Fuel Cell Science, Engineering and Technology
SP - 471
EP - 476
BT - Fuel Cell Science, Engineering and Technology
PB - American Society of Mechanical Engineers
T2 - First International Conference on Fuel Cell Science, Engineering and Technology
Y2 - 21 April 2003 through 23 April 2003
ER -
