scholarly journals Three-dimensional simulation of a new cooling strategy for proton exchange membrane fuel cell stack using a non-isothermal multiphase model

2019 ◽  
Vol 255 ◽  
pp. 113865 ◽  
Author(s):  
Guobin Zhang ◽  
Hao Yuan ◽  
Yun Wang ◽  
Kui Jiao
Keyword(s):  
Fuel Cell ◽  
Proton Exchange Membrane ◽  
Three Dimensional ◽  
Proton Exchange ◽  
Multiphase Model ◽  
Fuel Cell Stack ◽  
Cooling Strategy ◽  
Dimensional Simulation ◽  
Exchange Membrane

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.

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.

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