Optimized Cooling System for PEM Fuel Cell Stack Based on Entropy Generation Minimization

Volume 1 ◽  
2004 ◽  
Author(s):  
M. H. Saidi ◽  
A. A. Mozafari ◽  
L. Sharifian
Keyword(s):  
Fuel Cell ◽  
Turbulent Flow ◽  
Turbulent Flows ◽  
Entropy Generation ◽  
Design Methodology ◽  
Cooling System ◽  
Pem Fuel Cell ◽  
Fuel Cell Stack ◽  
Entropy Generation Minimization ◽  
Lower Entropy

Cell temperature in fuel cells is an important parameter which highly affects fuel cell stack efficiency. A suitable cooling system should satisfy an acceptable temperature range. In this research a relevant cooling system for a specified PEM fuel cell stack has been proposed complying with the criteria and cooling requirements of the fuel cell. The effect of various parameters on the entropy generation and temperature distribution in the cooling plates are surveyed. The number of cooling plates, the number of channels in each cooling plate and the channel width is determined. Two flow regimes namely laminar and turbulent flows of the cooling fluid in channels are analyzed and a design methodology is proposed for each regime of flow. The proposed design methodology in turbulent flow will be optimized while the work destruction is minimized. However, the proposed design in laminar flow is not the optimum one but the most efficient between different configurations. The comparison between these two proposed designs show that the turbulent flow has a lower entropy generation. In addition to entropy generation minimization, to have a desirable optimum cooling system, other parameters such as the size of the cooling plates and temperature uniformity inside cooling system have been investigated in this analysis.

Optimization of the PEM Fuel Cell Cooling System by Entropy Generation Minimization

2005 ◽  
Author(s):  
L. Sharifian ◽  
M. H. Saidi
Keyword(s):  
Fuel Cell ◽  
Entropy Generation ◽  
Cooling System ◽  
Optimization Technique ◽  
Pem Fuel Cell ◽  
Pumping Power ◽  
Plate Temperature ◽  
Cooling Fluid ◽  
Cooling Channels ◽  
Entropy Generation Minimization

Cooling system is essential for high power fuel cells to maintain cells temperature in an acceptable limit. In this paper a suitable cooling system for the PEM fuel cell has been designed and optimized. The design includes the number of the cooling plates, the proper circuit of the cooling channels in the plates, the channel dimensions, the flow rate of the cooling fluid and its temperature. The optimization technique is minimization of the entropy generation through the cooling plates. The design of the cooling channels and plates is such that the plate temperature doesn’t exceed from a desired temperature and the temperature variation in the plate becomes minimized. In this design, the coolant has a minimum pressure drop and the system needs minimum pumping power.

Turbulent flow in the distribution header of a PEM fuel cell stack

2011 ◽  
Vol 36 (12) ◽  
pp. 7136-7151 ◽  
Author(s):  
B. Chernyavsky ◽  
P.C. Sui ◽  
B.S. Jou ◽  
N. Djilali
Keyword(s):  
Fuel Cell ◽  
Turbulent Flow ◽  
Pem Fuel Cell ◽  
Fuel Cell Stack

Bond graph model of a PEM fuel cell stack

2008 ◽  
Vol 1 (06) ◽  
pp. 329-334
Author(s):  
S. Rabih ◽  
C. Turpin ◽  
S. Astier
Keyword(s):  
Fuel Cell ◽  
Graph Model ◽  
Pem Fuel Cell ◽  
Bond Graph ◽  
Fuel Cell Stack

Entropy Generation Minimization in a Tubular Solid Oxide Fuel Cell

2010 ◽  
Vol 132 (1) ◽  
Author(s):  
Adriano Sciacovelli ◽  
Vittorio Verda
Keyword(s):  
Fuel Cell ◽  
Solid Oxide Fuel Cell ◽  
Entropy Generation ◽  
Energy Equation ◽  
Solid Oxide ◽  
Geometrical Parameters ◽  
Oxide Fuel ◽  
Cell Geometry ◽  
Cell Efficiency ◽  
Entropy Generation Minimization

The aim of the paper is to investigate possible design modifications in tubular solid oxide fuel cell geometry to increase its performance. The analysis of the cell performances is conducted on the basis of the entropy generation. The use of this technique makes it possible to identify the phenomena provoking the main irreversibilities, understand their causes and propose changes in the system design and operation. The different contributions to the entropy generation are analyzed in order to develop new geometries that increase the fuel cell efficiency. To achieve this purpose, a CFD model of the cell is used. The model includes energy equation, fluid dynamics in the channels and in porous media, current transfer, chemical reactions, and electrochemistry. The geometrical parameters of the fuel cell are modified to minimize the overall entropy generation.

Diagnosis of PEM fuel cell stack based on magnetic fields measurements

2014 ◽  
Vol 47 (3) ◽  
pp. 11482-11487 ◽  
Author(s):  
T. Hamaz ◽  
C. Cadet ◽  
F. Druart ◽  
G. Cauffet
Keyword(s):  
Fuel Cell ◽  
Magnetic Fields ◽  
Pem Fuel Cell ◽  
Fuel Cell Stack

Parametric Sensitivity Tests — European PEM Fuel Cell Stack Test Procedures

2014 ◽  
Author(s):  
Samuel Simon Araya ◽  
Søren Juhl Andreasen ◽  
Søren Knudsen Kær
Keyword(s):  
Fuel Cell ◽  
Low Temperature ◽  
Pem Fuel Cell ◽  
Test Procedures ◽  
Fuel Cell Stack ◽  
Parametric Sensitivity ◽  
Benchmark Tests ◽  
Sensitivity Tests ◽  
Performance Results ◽  
Fuel Cell Operation

As fuel cells are increasingly commercialized for various applications, harmonized and industry-relevant test procedures are necessary to benchmark tests and to ensure comparability of stack performance results from different parties. This paper reports the results of parametric sensitivity tests performed based on test procedures proposed by a European project, Stack-Test. The sensitivity of a Nafion-based low temperature PEMFC stack’s performance to parametric changes was the main objective of the tests. Four crucial parameters for fuel cell operation were chosen; relative humidity, temperature, pressure, and stoichiometry at varying current density. Furthermore, procedures for polarization curve recording were also tested both in ascending and descending current directions.

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