scholarly journals Simulation and Optimization of Air-Cooled PEMFC Stack for Lightweight Hybrid Vehicle Application

2015 ◽  
Vol 2015 ◽  
pp. 1-11 ◽  
Author(s):  
Jingming Liang ◽  
Zefeng Wu
Keyword(s):  
Heat Transfer ◽  
Proton Exchange Membrane ◽  
Convection Heat Transfer ◽  
Hybrid Vehicle ◽  
Proton Exchange ◽  
Convection Heat ◽  
Simulation Data ◽  
Simulation And Optimization ◽  
Computational Fluid Dynamics Cfd ◽  
Exchange Membrane

A model of 2 kW air-cooled proton exchange membrane fuel cell (PEMFC) stack has been built based upon the application of lightweight hybrid vehicle after analyzing the characteristics of heat transfer of the air-cooled stack. Different dissipating models of the air-cooled stack have been simulated and an optimal simulation model for air-cooled stack called convection heat transfer (CHT) model has been figured out by applying the computational fluid dynamics (CFD) software, based on which, the structure of the air-cooled stack has been optimized by adding irregular cooling fins at the end of the stack. According to the simulation result, the temperature of the stack has been equally distributed, reducing the cooling density and saving energy. Finally, the 2 kW hydrogen-air air-cooled PEMFC stack is manufactured and tested by comparing the simulation data which is to find out its operating regulations in order to further optimize its structure.

Numerical analysis of static and dynamic heat transfer behaviors inside proton exchange membrane fuel cell

2021 ◽  
Vol 488 ◽  
pp. 229419
Author(s):  
Qianqian Wang ◽  
Fumin Tang ◽  
Bing Li ◽  
Haifeng Dai ◽  
Jim P. Zheng ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Fuel Cell ◽  
Numerical Analysis ◽  
Proton Exchange Membrane ◽  
Proton Exchange ◽  
Dynamic Heat Transfer ◽  
Exchange Membrane

Effect of Clamping Load on the Performance of Proton Exchange Membrane Fuel Cell Stack and Its Optimization Design: A Review of Modeling and Experimental Research

2013 ◽  
Vol 11 (2) ◽  
Author(s):  
Wei Zhang ◽  
Cheng-wei Wu
Keyword(s):  
Heat Transfer ◽  
Optimization Design ◽  
Proton Exchange Membrane ◽  
High Efficiency ◽  
High Reliability ◽  
Proton Exchange ◽  
Fuel Cell Stack ◽  
Practical Applications ◽  
Homogenous Distribution ◽  
Exchange Membrane

When individual proton exchange membrane fuel cells (PEMFCs) are assembled together to form a stack and provide energy for practical applications, an appropriate clamping load is usually required to render the stack high efficiency, high reliability, and excellent durability. From both modeling and experimental aspects, this article first highlights the effect of clamping load on the electron transfer, mass (water and reactant gases) transfer, and heat transfer in a PEMFC stack and then puts the attentions on the optimization design of clamping load with emphases on the optimal clamping load and the homogenous distribution of clamping load. This summary may deepen our understanding of the assembly of a PEMFC stack and provide referential information for the designer and manufacturer.

An Experimental Study of the Effect of a Turbulence Grid on the Stack Performance of an Air-Cooled Proton Exchange Membrane Fuel Cell

2019 ◽  
Vol 17 (1) ◽  
Author(s):  
Saher Al Shakhshir ◽  
Xin Gao ◽  
Torsten Berning
Keyword(s):  
Heat Transfer ◽  
Fuel Cell ◽  
Power Density ◽  
Proton Exchange Membrane ◽  
Numerical Study ◽  
Proton Exchange ◽  
Limiting Current ◽  
Cathode Side ◽  
Exchange Membrane ◽  
Turbulence Grid

Abstract In a previous numerical study on heat and mass transfer in air-cooled proton exchange membrane fuel cells, it was found that the performance is limited by heat transfer to the cathode side air stream that serves as a coolant, and it was proposed to place a turbulence grid before the cathode inlet in order to induce a mixing effect to the air and thereby improve the heat transfer and ultimately increase the limiting current and maximum power density. The current work summarizes experiments with different turbulence grids which varied in terms of their pore size, grid thickness, rib width, angle of the pores, and the distance between the grid and the cathode inlet. For all grids tested in this study, the limiting current density of a Ballard Mark 1020 ACS stack was increased by 20%. The single most important parameter was the distance between the turbulence grid and the cathode inlet, and it should be within 5 mm. For the best grid tested, the fuel cell stack voltage and thus the efficiency were increased by up to 20%. The power density was increased by more than 30% and further improvements are believed to be possible.

A Numerical Investigation of Heat and Mass Transfer in Air-Cooled Proton Exchange Membrane Fuel Cells

2019 ◽  
Author(s):  
Torsten Berning
Keyword(s):  
Heat Transfer ◽  
Fuel Cells ◽  
Fuel Cell ◽  
Proton Exchange Membrane ◽  
Waste Heat ◽  
Proton Exchange ◽  
Fuel Cell Performance ◽  
Air Stream ◽  
Multi Phase ◽  
Exchange Membrane

Abstract A numerical analysis of an air-cooled proton exchange membrane fuel cell (PEMFC) has been conducted. The model utilizes the Eulerian multi-phase approach to predict the occurrence and transport of liquid water inside the cell. It is assumed that all the waste heat must be carried out of the fuel cell with the excess air which leads to a strong temperature increase of the air stream. The results suggest that the performance of these fuel cells is limited by membrane overheating which is ultimately caused by the limited heat transfer to the laminar air stream. A proposed remedy is the placement of a turbulence grid before such a fuel cell stack to enhance the heat transfer and increase the fuel cell performance.

Criteria for Characterizing the Performances of Fuel Cell Humidifiers: Theoretical Approach and Experimental Results

2008 ◽  
Author(s):  
Corinne Dalet ◽  
Olivier Lottin ◽  
Gae¨l Maranzana ◽  
Mouad Diny
Keyword(s):  
Heat Transfer ◽  
Fuel Cell ◽  
Proton Exchange Membrane ◽  
Proton Exchange ◽  
The Other ◽  
Gas Streams ◽  
Mass And Heat Transfer ◽  
Two Parameters ◽  
Exchange Membrane ◽  
General Method

In a proton exchange membrane fuel cell (PEMFC), humidification of reactant gases must be carefully optimized. Extremes in humidity levels at the low end (membrane dehydratation) and at the high end of the range (cathode flooding) can seriously reduce PEMFC performances. Various devices already exist to humidify and to adjust the temperature of gas streams. Criteria for the evaluation of their performances depend on the technology and/or differ from one manufacturer to the other, which makes comparison difficult. A fortiori, there is no consensus regarding their ideal values and no general method for their evaluation. The purpose of this article is to define two parameters (efficiencies) suitable for all humidification technologies and characterizing air humidifier performances in term of mass and heat transfer. These parameters allow to compare the different technologies and to define, for all of them, the range of performances required to supply fuel cells with properly humidified gases.

Sign in / Sign up

Export Citation Format

Share Document