Thermal conductivity of a graphite bipolar plate (BPP) and its thermal contact resistance with fuel cell gas diffusion layers: Effect of compression, PTFE, micro porous layer (MPL), BPP out-of-flatness and cyclic load
نویسندگان
چکیده
Thermal conductivity of graphite bipolar plates (BPP) decreases with temperature. Thermal Contact resistance (TCR) between BPP and GDLs decreases with compression. GDL-BPP TCR increases with MPL and PTFE, regardless of the PTFE loading. High PTFE loading, MPL, and BPP outof-flatness increase the TCR dramatically. The graphite BPP-GDL TCR is a dominant resistance in a BPP-GDL assembly. a r t i c l e i n f o
منابع مشابه
Effect of Polytetrafluoroethylene (PTFE) and micro porous layer (MPL) on thermal conductivity of fuel cell gas diffusion layers: Modeling and experiments
An analytic robust model is developed for estimating GDL thermal conductivity. The model considers PTFE addition to the GDL. Thermal conductivity of MPL is accurately measured in a compression range of 2e14 bar. Effect of thermal conductivity on PTFE, MPL, and compression is considered. Thermal contact resistances between GDL and MPL/iron surface are measured. a r t i c l e i n f o
متن کاملEffect of Ptfe on Thermal Conductivity of Gas Diffusion Layers of Pem Fuel Cells
Through-plane thermal conductivity of 14 SIGRACET gas diffusion layers (GDLs), including series 24 & 34, as well as 25 & 35, are measured under different compressive pressures, ranging from 2 to 14 bar, at the temperature of around 60 ͦC. The effect of compression, PTFE loadings, and micro porous layer (MPL) on thermal conductivity of the GDLs and their contact resistance with an iron clamping s...
متن کاملFinite Element Simulation and ANFIS Prediction of Dimensional Error Effect on distribution of BPP/GDL Contact Pressure in PEM Fuel Cell
Distribution of contact pressure between the bipolar plate and gas diffusion layer considerably affect the performance of proton exchange membrane fuel cell. In this regard, an adaptive neuro-fuzzy inference system (ANFIS) is developed to predict the contact pressure distribution on the gas diffusion layer due to dimensional errors of the bipolar plate ribs in a proton exchange membrane fuel ce...
متن کاملEffect of Compression on the Effective Thermal Conductivity and Thermal Contact Resistance in Pem Fuel Cell Gas Diffusion Layers
Heat transfer through the gas diffusion layer (GDL) of a PEM fuel cell is a key process in the design and operation a PEM fuel cell. The analysis of this process requires determination of the effective thermal conductivity as well as the thermal contact resistance between the GDL and adjacent surfaces/layers. In the present study, a guarded-hot-plate apparatus has been designed and built to mea...
متن کاملAnalytic determination of the effective thermal conductivity of PEM fuel cell gas diffusion layers
Accurate information on the temperature field and associated heat transfer rates are particularly important in devising appropriate heat and water anagement strategies in proton exchange membrane (PEM) fuel cells. An important parameter in fuel cell performance analysis is the effective hermal conductivity of the gas diffusion layer (GDL). Estimation of the effective thermal conductivity is com...
متن کامل