Application of a thermally conductive pyrolytic graphite sheet to thermal management of a PEM fuel cell

Wen, Chih-Yung; Huang, Guo Wei

doi:10.1016/j.jpowsour.2007.12.040

Cited by 92 publications

(36 citation statements)

References 19 publications

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“…Temperature monitoring is therefore crucial to ensure effective and durable operation. In practice, this is normally performed using a single-point thermocouple inserted in the centre of the cell [16,26,75], or for development work using multiple micro thermocouple measurements at various locations in the fuel cell [13,78,79].…”

Section: Air-cooled Open-cathode Fuel Cellsmentioning

confidence: 99%

The Hydro-electro-thermal Performance of Air-cooled, Open-cathode Polymer Electrolyte Fuel Cells: Combined Localised Current Density, Temperature and Water Mapping

Meyer

Ashton

Jervis

et al. 2015

Electrochimica Acta

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In situ diagnostic techniques provide a means of understanding the internal workings of fuel cells so that improved designs and operating regimes can be identified. Here, a novel metrology approach is reported that combines current and temperature mapping with water visualisation using neutron radiography.The approach enables a hydro-electro-thermal performance map to be generated that is applied to an air-cooled, open-cathode polymer electrolyte fuel cell. This type of fuel cell exhibits a particularly interesting coupled relationship between water, current and heat, as the air supply has the due role of cooling the stack as well as providing the cathode reactant feed via a single source. It is found that water predominantly accumulates under the cooling channels (thickness of 70-100 µm under the cooling channels and 5-25 µm in the active channels at 0.5 A cm KeywordsAir-cooled open-cathode polymer electrolyte fuel cell; water mapping; neutron imaging; temperature mapping; current mapping.

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Section: Air-cooled Open-cathode Fuel Cellsmentioning

confidence: 99%

The Hydro-electro-thermal Performance of Air-cooled, Open-cathode Polymer Electrolyte Fuel Cells: Combined Localised Current Density, Temperature and Water Mapping

Meyer

Ashton

Jervis

et al. 2015

Electrochimica Acta

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“…Furthermore, carbon fibers are expected to exhibit an anisotropic thermal conductivity as e.g. pyrolytic graphite (Wen & Huang, 2008) -the degree of anisotropy depending on the type of fiber -due to their anisotropic, partly graphite-like structure. Both, the anisotropy in microstructure and the anisotropy of thermal conductivity in carbon fibers is not into account in any of the presented models.…”

Section: Estimation Of Thermal Conductivity Of Heterogeneous Materialsmentioning

confidence: 99%

Computation of Thermal Conductivity of Gas Diffusion Layers of PEM Fuel Cells

Pfrang¹,

Veyret²,

Tsotridis³

2011

Convection and Conduction Heat Transfer

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“…Fuel cell stacks larger than 100 W generally need a separate reactant air supply and cooling system. The usual way of cooling the stacks in the range from about 100 to 1,000 W is to add extra channels in the BPPs through which cooling air can be supplied [25,72,78]. Alternatively, separate cooling plates can be added with channels made for air to flow through.…”

Section: Cooling With Separate Air Flowmentioning

confidence: 99%

“…The cooling is achieved through utilisation of the enthalpy of vaporisation of water. The evaporative cooling with water can be achieved using: direct introduction of the liquid water into the reactant gas channels [23,78]; BPPs with in-plane wicking material, or porous water transport BPPs [25]. The heat generated at the electrodes is removed by the water for its phase change while keeping the temperature constant.…”

Section: Evaporative Coolingmentioning

confidence: 99%

Review on management, mechanisms and modelling of thermal processes in PEMFC

Bvumbe¹,

Bujło²,

Tolj³

et al. 2016

Hydrogen and Fuel Cells

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Abstract:In an effort to reduce the environmental impact of the energy sector that is mostly based on fossil fuels, researchers are looking for a clean alternative of our existing energy sources. Hydrogen Energy and Fuel Cells, and in particular Polymer Electrolyte Membrane Fuel Cells (PEMFCs) have emerged as a leading candidate for transportation as well as stationary and portable applications. Due to the irreversibility of the electrochemical reactions and ohmic heating in the fuel cell components, the PEMFC produces a significant amount of heat and this heat has to be removed in order to avoid cell or stack overheating. In this paper, a review of the key heat transfer mechanisms and the various cooling strategies that are available for heat removal from PEMFCs are presented. Due to the interrelated nature and difficulty of conducting in-situ thermal measurements on the operating PEMFCs, computational modelling provides a fast and efficient way of designing PEMFC cooling systems and understanding the heat transfer mechanisms. Therefore PEMFC thermal modelling is also highlighted together with present challenges and potential areas for further research and development works.

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Application of a thermally conductive pyrolytic graphite sheet to thermal management of a PEM fuel cell

Cited by 92 publications

References 19 publications

The Hydro-electro-thermal Performance of Air-cooled, Open-cathode Polymer Electrolyte Fuel Cells: Combined Localised Current Density, Temperature and Water Mapping

The Hydro-electro-thermal Performance of Air-cooled, Open-cathode Polymer Electrolyte Fuel Cells: Combined Localised Current Density, Temperature and Water Mapping

Computation of Thermal Conductivity of Gas Diffusion Layers of PEM Fuel Cells

Review on management, mechanisms and modelling of thermal processes in PEMFC

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