Heat and mass transfer analysis in single cell of PEFC using different PEM and GDL at higher temperature

Nishimura, Akira; Kamiya, Satoru; Okado, Tatsuya; Sato, Yusuke; Hirota, Masafumi; Kolhe, Mohan Lal

doi:10.1016/j.ijhydene.2019.05.192

Cited by 19 publications

(31 citation statements)

References 20 publications

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“…According to the pre-experiment, the impact of the observation window on the power generation performance can be ignored. In this pre-experiment, the initial temperature was set to 343 K, and the RHs of supply gases of the anode and cathode were 80%RH with and without a hole for the purpose of temperature measurement observations [27,28]. According to this pre-experiment, we confirmed voltage drops caused by observation window at the current (load) density of 0.80 A/cm 2 during anode and cathode observation tests of only 4% and 7%, respectively.…”

Section: Experimental Setup and Proceduresmentioning

confidence: 66%

“…Table 1 shows the specifications of cell components of the single cells of PEFC used in this study. Figure 1 shows the experimental procedure and cell structure used to measure the temperature [22,23,27,28]. The current collector and end plate had a hole measuring 50 mm × 50 mm, which was used to measure temperature via thermographs, having the same size as the electrode.…”

Section: Experimental Setup and Proceduresmentioning

confidence: 99%

“…We measured the in-plane temperature distribution caused by the reaction heat via a thermograph. The current density was kept at 0.80 A/cm 2 , meaning that the temperature of single cell with no heat input from the electric heater could be measured [27,28]. The manufacture's descriptions indicate that the thermal conductivities of the PEM, GDL and separator are 0.195, 1.7 and 25 W/(M•K), respectively.…”

Section: Experimental Setup and Proceduresmentioning

confidence: 99%

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Impacts of Separator Thickness on Temperature Distribution and Power Generation Characteristics of a Single PEMFC Operated at Higher Temperature of 363 and 373 K

et al. 2022

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The aim of this study is to investigate the effects of the separator thickness on not only the heat and mass transfer characteristics, but also the power generation characteristics of a polymer electrolyte membrane fuel cell (PEMFC) with a thin polymer electrolyte membrane (PEM) and thin gas diffusion layer (GDL) operated at higher temperatures of 363 and 373 K. The in-plane temperature distributions on the back of the separator at the anode and cathode, which are the opposite sides to the GDL, are measured using a thermograph at various initial cell temperatures (Tinit), relative humidity (RH) levels, and supply gas flow rates. The total voltage corresponding to the load current is measured in order to evaluate the performance of the PEMFC. As a result, it is revealed that the effect of the RH on the power generation characteristics is more significant when the separator thickness decreases. It is revealed that the power generation performance obtained at high current densities decreases with the increase in Tinit with thinner separator thicknesses. According to the investigation of the in-plane temperature distribution, it is clarified that the temperature decreases at corner positions in the separator with the separator thickness of 2.0 mm, while the temperature gradually increases along with the gas flow with separator thicknesses of 1.5 mm and 1.0 mm.

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Section: Experimental Setup and Proceduresmentioning

confidence: 66%

Section: Experimental Setup and Proceduresmentioning

confidence: 99%

Section: Experimental Setup and Proceduresmentioning

confidence: 99%

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Impacts of Separator Thickness on Temperature Distribution and Power Generation Characteristics of a Single PEMFC Operated at Higher Temperature of 363 and 373 K

et al. 2022

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“…Mass transport phenomena in a cell such as distributions of H 2 , O 2 , and H 2 O concentration are also being investigated [12][13][14]. The temperature distribution on the back of the separator and the interface between PEM and the cathode catalyst layer has been investigated experimentally [15,16] and numerically [17,18], respectively, by the authors. Though the current density and temperature distribution were studied experimentally [19] and numerically [20] at the same time, there have been no reports investigating the distribution of H 2 , O 2 , H 2 O concentration and current density on the interface between PEM and the anode catalyst layer, where the H 2 oxidation reaction occurs or the interface between PEM and the cathode catalyst layer where the O 2 reduction reaction occurs.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation on Impacts of Thickness of Nafion Series Membranes and Relative Humidity on PEMFC Operated at 363 K and 373 K

et al. 2021

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The purpose of this study is to understand the impact of the thickness of Nafion membrane, which is a typical polymer electrolyte membrane (PEM) in Polymer Electrolyte Membrane Fuel Cells (PEMFCs), and relative humidity of supply gas on the distributions of H2, O2, H2O concentration and current density on the interface between a Nafion membrane and anode catalyst layer or the interface between a Nafion membrane and cathode catalyst layer. The effect of the initial temperature of the cell (Tini) is also investigated by the numerical simulation using the 3D model by COMSOL Multiphysics. As a result, the current density decreases along with the gas flow through the gas channel irrespective of the Nafion membrane thickness and Tini, which can be explained by the concentration distribution of H2 and O2 consumed by electrochemical reaction. The molar concentration of H2O decreases when the thickness of Nafion membrane increases, irrespective of Tini and the relative humidity of the supply gas. The current density increases with the increase in relative humidity of the supply gas, irrespective of the Nafion membrane thickness and Tini. This study recommends that a thinner Nafion membrane with well-humidified supply gas would promote high power generation at the target temperature of 363 K and 373 K.

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“…However, most of the studies involving the impacts of RH on PEMFC are limited to less than 80 • C. Studies on this subject at higher temperatures (over 80 • C) have seldomly been published. Nishimura et al [16,17] focused on the temperature distribution in a single PEMFC and used a thermograph to investigate the impact of RH and GDL thickness on the in-plane temperature distribution of the separator backside. Akitomo et al [18] provided a solution to solve the problem resulting from the reduced oxygen pressure in the high temperature (100 • C) by pressurizing gas.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Inlet Gas Relative Humidity on Performance Characteristics of PEMFC Operating at Elevated Temperature

Chang

Zhang

et al. 2021

WEVJ

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Raising the operating temperature is considered to be an effective method to improve the output performance of proton exchange membrane fuel cells (PEMFCs). In this paper, the effects of inlet relative humidity in the anode (RHa) and cathode (RHc) on the polarization curve and impedance spectra of a single rotating serpentine PEMFC were investigated by experimental method at the operating temperature of 90 °C. It was found that the output performance is the smallest in the high RH case (RHa90%/RHc90%) due to the largest mass transfer resistance. However, the ohmic resistance in the dry case (RHa50%/RHc50%) is the highest, and it shows better output performance at more than 1.0 A/cm2 because of the lowest mass transfer resistance. The impact of the changes in the RHa value on the polarization curve is more apparent than that of the RHc changes at high current density. The largest power density can be attained and the efficiency can reach 24.4% when the RHa is 90% and RHc is 50%.

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Heat and mass transfer analysis in single cell of PEFC using different PEM and GDL at higher temperature

Cited by 19 publications

References 20 publications

Impacts of Separator Thickness on Temperature Distribution and Power Generation Characteristics of a Single PEMFC Operated at Higher Temperature of 363 and 373 K

Impacts of Separator Thickness on Temperature Distribution and Power Generation Characteristics of a Single PEMFC Operated at Higher Temperature of 363 and 373 K

Numerical Simulation on Impacts of Thickness of Nafion Series Membranes and Relative Humidity on PEMFC Operated at 363 K and 373 K

Investigation of Inlet Gas Relative Humidity on Performance Characteristics of PEMFC Operating at Elevated Temperature

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