The Effect of Compressive Load on Proton Exchange Membrane Fuel Cell Stack Performance and Behavior

2006 ◽  
Vol 129 (8) ◽  
pp. 1004-1013 ◽  
Author(s):  
N. Fekrazad ◽  
T. L. Bergman
Keyword(s):  
Fuel Cell ◽  
Proton Exchange Membrane ◽  
Thermal Contact ◽  
Compressive Load ◽  
Compressive Force ◽  
Gas Diffusion ◽  
Proton Exchange ◽  
Electrochemical Characteristics ◽  
Fuel Cell Stack ◽  
Exchange Membrane

A two-dimensional model of a proton exchange membrane fuel cell stack is developed. Taking advantage of the geometrical periodicity of the stack, the model is used to predict the detailed thermal and electrochemical characteristics of the fuel cell. Using recently reported as well as new experimental results, the electrical and thermal contact resistances and modifications in the gas diffusion layer transport properties that develop within the stack in response to changes in the compressive force used to assemble the stack are accounted for. The fuel cell stack performance, reported in terms of its power output and internal temperature distributions, is very sensitive to the compressive load.

Effect of Clamping Pressure on PEM Fuel Cell Stack Performance

2005 ◽  
Author(s):  
N. Fekrazad ◽  
T. L. Bergman
Keyword(s):  
Fuel Cell ◽  
Proton Exchange Membrane ◽  
Thermal Contact ◽  
Compressive Load ◽  
Compressive Force ◽  
Proton Exchange ◽  
Fuel Cell Stack ◽  
Fuel Cell Performance ◽  
Exchange Membrane ◽  
Clamping Pressure

A two-dimensional mathematical model of a Proton Exchange Membrane fuel cell stack is developed. Taking advantage of the geometrical periodicity within the stack, the model is used to predict the detailed thermal, humidity, and electrochemical behavior of the fuel cell. Using recently-reported experimental results, the electrical and thermal contact resistances that develop within the stack, in response to the compressive force used to assemble the stack, are accounted for. The fuel cell performance, reported in terms of its power output and internal temperature distributions, is predicted to be very sensitive to the compressive load applied to the stack.

Effect of Non-Uniform Clamping Pressure on PEM Fuel Cell Stack Performance

2007 ◽  
Author(s):  
N. Fekrazad ◽  
T. L. Bergman
Keyword(s):  
Fuel Cell ◽  
Proton Exchange Membrane ◽  
Three Dimensional ◽  
Compressive Force ◽  
Thermal Conditions ◽  
Proton Exchange ◽  
Three Dimensional Model ◽  
Fuel Cell Stack ◽  
Exchange Membrane ◽  
Clamping Pressure

A three-dimensional model of a Proton Exchange Membrane fuel cell stack is developed. Taking advantage of the geometrical periodicity of a typical stack assembly, the model is used to predict the thermal, humidity, and electrochemical distributions within the fuel cell. Of particular interest is the effect of the compressive force used to assemble the stack on the fuel cell’s (a) power output and (b) internal temperature distribution. Application of non-uniform clamping pressure is considered, and predictions suggest that thermal conditions within the stack can be made more uniform with negligible impact on the fuel cell power. Hence, improved fuel cell stack durability might be achieved through judicious application of non-uniform clamping pressures for stack assembly.

scholarly journals Modelling of Humidity Dynamics for Open-Cathode Proton Exchange Membrane Fuel Cell

2021 ◽  
Vol 12 (3) ◽  
pp. 106
Author(s):  
Fengxiang Chen ◽  
Liming Zhang ◽  
Jieran Jiao
Keyword(s):  
Fuel Cell ◽  
Mass Flow ◽  
Proton Exchange Membrane ◽  
Flow Model ◽  
Transport Theory ◽  
Gas Diffusion ◽  
Proton Exchange ◽  
Operating Conditions ◽  
Output Performance ◽  
Exchange Membrane

The durability and output performance of a fuel cell is highly influenced by the internal humidity, while in most developed models of open-cathode proton exchange membrane fuel cells (OC-PEMFC) the internal water content is viewed as a fixed value. Based on mass and energy conservation law, mass transport theory and electrochemistry principles, the model of humidity dynamics for OC-PEMFC is established in Simulink® environment, including the electrochemical model, mass flow model and thermal model. In the mass flow model, the water retention property and oxygen transfer characteristics of the gas diffusion layer is modelled. The simulation indicates that the internal humidity of OC-PEMFC varies with stack temperature and operating conditions, which has a significant influence on stack efficiency and output performance. In order to maintain a good internal humidity state during operation, this model can be used to determine the optimal stack temperature and for the design of a proper control strategy.

Observation of Pressure Drop Behavior in an Operating Fuel Cell Stack

2005 ◽  
Author(s):  
Frano Barbir ◽  
Haluk Gorgun ◽  
Xinting Wang
Keyword(s):  
Fuel Cell ◽  
Pressure Drop ◽  
Proton Exchange Membrane ◽  
Proton Exchange ◽  
Cathode Side ◽  
Fuel Cell Stack ◽  
Flow Through ◽  
Drying Conditions ◽  
Exchange Membrane ◽  
The Relationship

Pressure drop on the cathode side of a PEM (Proton Exchange Membrane) fuel cell stack has been studied and used as a diagnostic tool. Since the Reynolds number at the beginning of the flow field channel was <250, the flow through the channel is laminar, and the relationship between the pressure drop and the flow rate is linear. Some departure from linearity was observed when water was either introduced in the stack or produced inside the stack in the electrochemical reaction. By monitoring the pressure drop in conjunction with the cell resistance in an operational fuel cell stack, it was possible to diagnose either flooding or drying conditions inside the stack.

Sign in / Sign up

Export Citation Format

Share Document