Heat and mass transfer effects in PEM fuel cells

Vanderborgh, N.E.; Huff, J R; Hedstrom, J.C.

doi:10.1109/iecec.1989.74690

Cited by 5 publications

(3 citation statements)

References 2 publications

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“…Other problems of the membrane such as shrinkage and rupture due to its low glass transition temperature may appear [21]. Research efforts such as water injection into the anode flow channel [22], and recirculation gas fans, humidifiers and heat exchangers to provide humidification for the anode [23] have been adopted for effective thermal management of fuel cells to prevent dehydration and maintain performance. Water produced at the cathode has also been suggested to be utilized to cool fuel cells.…”

Section: Fuel Cellsmentioning

confidence: 99%

Thermal Management in Electrochemical Energy Storage Systems

Xiong

Kundu

Fisher

2015

Thermal Effects in Supercapacitors

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With growing energy demands and the looming depletion of fossil fuels, electrochemical energy conversion and storage systems are under aggressive development for current and future renewable energy needs [1]. Hybrid electric vehicles (HEVs), combining two power sources-internal combustion engines and electric motors in order to achieve better performance, are already common. The major types of electrochemical storage system are batteries, capacitors, fuel cells, and their combinations. The prime performance metrics for comparing these technologies are reliability, power and energy density, cycle-life, temperature range and emission of pollutants. Batteries and capacitors are closed systems with anodes, cathodes and separators that are soaked with electrolytes and sealed in a single compartment. Conversely in fuel cells, the fuel, consisting of hydrogen at the anode and oxygen at the cathode, is supplied from a tank. Figure 1.1 provides a Ragone plot that compares different electrochemical energy storage systems to internal combustion engines and turbines, and electrolytic capacitors. As apparent from the simplified Ragone plot, supercapacitors bridge the gap between conventional electrolytic capacitors and batteries in terms of specific energy and power densities. The terms specific energy (in Wh kg −1 ) and energy density in (Wh L −1 ) are generally used to assess energy storage systems, whereas their rate capability is represented by specific power (in W kg −1 ) or power density (in W L −1 ). Thermal management of energy storage systems is essential for their high performance over suitably wide temperature ranges. At low temperatures, performance decays mainly because of the low ionic conductivity of the electrolyte; while at high temperatures, the components tend to age due to a series of side reactions, causing safety and reliability issues [2]. Therefore, trade-offs exist among system performance, functionality, design, cost, maintenance, and safety. Optimization of these parameters to achieve high performance of power supplies requires fundamental and thorough understanding of thermal transport in the systems. This chapter provides a brief introduction to thermal management in major electrochemical energy storage systems.

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Section: Fuel Cellsmentioning

confidence: 99%

Thermal Management in Electrochemical Energy Storage Systems

Xiong

Kundu

Fisher

2015

Thermal Effects in Supercapacitors

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“…The temperature profile can be simulated by considering the heat generated in the fuel cell, the heat removed through natural convection occurred at the end of the plates or by conduction to the cooling plates, and heat effects related to the mass transfer of species with different temperature [34,42,43,62,89,90]. However, so far, only the temperature change along the flow channel ;has been studied.…”

Section: Hydrogen Fuel Cellsmentioning

confidence: 99%

A Review of Mathematical Models for Hydrogen and Direct Methanol Polymer Electrolyte Membrane Fuel Cells

Karan²,

et al. 2004

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This paper presents a review of the mathematical modeling of two types of polymer electrolyte membrane fuel cells: hydrogen fuel cells and direct methanol fuel cells. Models of single cells are described as well as models of entire fuel cell stacks. Methods for obtaining model parameters are briefly summarized, as well as the numerical techniques used to solve the model equations. Effective models have been developed to describe the fundamental electrochemical and transport phenomena occurring in the diffusion layers, catalyst layers, and membrane. More research is required to develop models that are validated using experimental data, and models that can account for complex two‐phase flows of liquids and gases.

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“…A fuel cell is a complex assembly of several material types with different temperature characteristics (heat conductivity, density, heat capacity) and all the material parameters are also dependent on heat [4,5].…”

Section: Essential Analysis Issuesmentioning

confidence: 99%

CFD analysis of temperature distribution of PEM type fuel cell

Kacor

Minarik

Moldrik

2015

2015 16th International Scientific Conference on Electric Power Engineering (EPE)

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The paper deals with analysis of temperature rise in a fuel cell module using the CFD numerical model. The module is based on a low-temperature fuel cell with polymer electrolytic membrane. There is a simulation of stable condition, when the cell supplies constant output and the system generates waste heat exhausted through the cooling fins. The aim of analysis was to find potential problematic spots with higher temperature rise values. The results of simulation serve for design of an optimal cooling for the fuel cell.

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Heat and mass transfer effects in PEM fuel cells

Abstract: Thermal and water management procedures in PEM fuel cells are described that influence stack performance. Using appropriate humidification and cooling strategies, stable high power density performance is predicted.Introduction:

Cited by 5 publications

References 2 publications

Thermal Management in Electrochemical Energy Storage Systems

Thermal Management in Electrochemical Energy Storage Systems

A Review of Mathematical Models for Hydrogen and Direct Methanol Polymer Electrolyte Membrane Fuel Cells

CFD analysis of temperature distribution of PEM type fuel cell

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