Announcement and call for papers third international conference on compact heat exchangers and enhancement technology for the process industries

Shah, R. K.; Deakin, Andrew; Honda, Hiroshi; Rudy, Thomas M.

doi:10.1016/s0894-1777(00)00041-8

Cited by 2 publications

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“…In order to consider the effect of CO or CO 2 , that can be present in the fuel if the stack is fed by a syngas, the adsorption, desorption and electro-oxidation of carbon monoxide and the reverse water gas shift reaction, which can take place in the anode side, are also considered, as investigated and analyzed in recent experimental and numerical studies [24][25][26][27][28][29][30][31][32]. Therefore, the anode activation overpotential is calculated by solving a set of equations, as described in Appendix B.…”

Section: Model Formulationmentioning

confidence: 99%

“…The development of a cooling system, able to recover the thermal energy from the stack, is an important issue for a decentralized combined heat and power production in order to satisfy the thermal energy demand, while in a mobile or UPS application, the purpose of the cooling system is mainly to dissipate the heat at the same rate by which it is being produced, allowing the fuel cell stack to run steadily at a constant temperature [1][2][3][4][5][6]. …”

Section: Introductionmentioning

confidence: 99%

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Experimental Characterization and Numerical Modeling of PEMFC Stacks Designed for Different Application Fields

2011

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Proton exchange membrane fuel cell (PEMFC) is regarded as a potential future power technology for stationary and mobile applications due to its high efficiency (full and partial load), rapid start‐up, high power density, and low emissions.Depending on their particular application field (decentralized combined heat and power production, uninterrupted power supplies (UPS), or mobile applications) different operating conditions and designing parameters are required and different performance can be expected.Thus, the aim of this paper is to investigate the behavior and performance of two stacks of the same size, developed with a different approach according to their application sectors.The first PEMFC stack is designed for UPS units or mobile purpose, the second one, is designed to supply heat and power in residential applications (CHP units).The analysis of the stacks behavior has been carried out by using both experimental and numerical investigations.Experimental results have allowed: (i) to characterize the stacks; (ii) to calibrate the numerical model; (iii) to supply useful data for setting and improving the control system.

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Section: Model Formulationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Experimental Characterization and Numerical Modeling of PEMFC Stacks Designed for Different Application Fields

2011

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Evaluation of a Tapered Header Configuration to Reduce Flow Maldistribution in Minichannels and Microchannels

Dharaiya

Radhakrishnan

Kandlikar

2009

ASME 2009 7th International Conference on Nanochannels, Microchannels and Minichannels

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In designing a heat exchanger, it is generally assumed that the fluid is uniformly distributed through the heat exchanger core. In reality, the flow distribution is rarely uniform due to inlet and outlet header designs and flow velocity changes in the headers. The flow distribution through a plate-fin heat exchanger (straight Z-type flow) with parallel microchannels and minichannels is studied by using a Computational Fluid Dynamics (CFD) code FLUENT. It was found that the flow maldistribution is quite severe with constant cross-sectional area headers. A modified header design with tapered cross-section was employed and the flow and pressure distributions were investigated using the CFD model. Further, a mathematical model was used to study the effect of the tapered headers on the pressure difference available for each channel across its inlet and outlet ends. The pressure difference across each channel is responsible for the actual flow rate through the channel. Results from the CFD were compared with the model predictions.

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Announcement and call for papers third international conference on compact heat exchangers and enhancement technology for the process industries

Cited by 2 publications

References 0 publications

Experimental Characterization and Numerical Modeling of PEMFC Stacks Designed for Different Application Fields

Experimental Characterization and Numerical Modeling of PEMFC Stacks Designed for Different Application Fields

Evaluation of a Tapered Header Configuration to Reduce Flow Maldistribution in Minichannels and Microchannels

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