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International Heat Transfer Conference 13

ISSN: 2377-424X (online)
ISSN: 2377-4371 (flashdrive)

TWO-PHASE FLOW IN ANODE INTERDIGITAL FLOW BED OF A LIQUID FED DIRECT METHANOL FUEL CELL

Hang Guo
MOE Key Laboratory of Enhanced Heat Transfer and Energy Conservation, and Beijing Key Laboratory of Heat Transfer and Energy Conversion, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124, China

Jie Lin Jia
MOE Key Laboratory of Enhanced Heat Transfer and Energy Conservation, and Beijing Key Laboratory of Heat Transfer and Energy Conversion, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing, 100124, China

J. Kong
College of Environmental and Energy Engineering, Beijing University of Technology, Beijing, China

Fang Ye
MOE Key Laboratory of Enhanced Heat Transfer and Energy Conservation, and Beijing Key Laboratory of Heat Transfer and Energy Conversion, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124, China

Chong Fang Ma
MOE Key Laboratory of Enhanced Heat Transfer and Energy Conservation, and Beijing Key Laboratory of Heat Transfer and Energy Conversion, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing, 100124, China

DOI: 10.1615/IHTC13.p24.40
9 pages

Abstract

Liquid fed direct methanol fuel cells have drawn increasing attention in recent years. In this paper, a liquid fed direct methanol fuel cell with transparent window was designed and fabricated for visual investigations of carbon dioxide bubbles behaviour and two-phase flow characteristics in anode interdigital flow bed under different operating conditions. The experimental results showed that the electrochemical reaction and two-phase flow interacted each other. The gas void fraction of carbon dioxide gas and mean size of CO2 bubbles increased with increase in current density, as well as cell temperature. The two-phase flow patterns in the interdigital flow bed are different from the phenomena in parallel channels flow bed and serpentine channel flow bed. There were gas columns in the inlet channels. The two-phase flow in outlet channels was bubbly flow. Slug flow was not observed in outlet channels of interdigital flow bed. The typical flow pattern in outlet manifold is slug flow. But bubbly flow and slug flow coexisted in the outlet manifold at low temperature. The effect of input flow rate of methanol solution was also studied. High flow rate was helpful for removal of carbon dioxide bubbles from flow bed.

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Measurement of fluid temperature with an arrangement of three thermocouples