http://yetl.yabesh.ir/yetl1/handle/yetl/19057 2026-04-04T16:19:55Z 2026-04-04T16:19:55Z Salim, R. I. Noura, H. Nabag, M. Fardoun, A. http://yetl.yabesh.ir/yetl1/handle/yetl/158410 2018-01-27T11:35:06Z 2015-01-01T00:00:00Z

Modeling and Temperature Analysis of the Nexa 1.2 kW Fuel Cell System Salim, R. I.; Noura, H.; Nabag, M.; Fardoun, A. The United Arab Emirates (UAE) has been exploring several renewable and green technologies to help reduce the increasing pollution rates. However, its coarse climate might impose some limitations toward the types of green technologies that can be effectively deployed in the region. In the first part of this work, an improved dynamic model of the Nexa 1.2 kW PEM fuel cell is developed using particle swarm optimization (PSO), and validated using experimental data. The developed model is then used to analyze the effect of the severe climate conditions of the UAE on the performance of the system to evaluate its operational compatibility with the region.

2015-01-01T00:00:00Z Sarkar, Tirthajyoti Mazumder, Sudip K. http://yetl.yabesh.ir/yetl1/handle/yetl/158409 2018-01-27T11:35:06Z 2015-01-01T00:00:00Z

Analysis of Input Current Ripple and Optimum Filter Capacitor for Fuel Cell Based Single Phase Inverter Sarkar, Tirthajyoti; Mazumder, Sudip K. Most singlephase inverters, being sourced by fuel cell stacks (FCSs), subject the stacks to reflected lowfrequency (120 Hz) current ripples that ride on average dc currents. The ripple current impacts the sizing and efficiency of the FCS. As such and typically, a passive or active filter is required at the input of the inverter (or output of the FCS) to mitigate the ripple current. Toward that end, this paper outlines a guideline to choose the optimum size of a passive inputfilter capacitor for a fuelcellbased power system from the standpoints of the overall system energy density and cost. Detailed casespecific simulation results, based on an analytical approach, are provided to illustrate key issues for both unity power factor as well as harmonic loads.

2015-01-01T00:00:00Z Saripella, Bhaskar P. Koylu, Umit O. Leu, Ming C. http://yetl.yabesh.ir/yetl1/handle/yetl/158411 2018-01-27T11:35:06Z 2015-01-01T00:00:00Z

Experimental and Computational Evaluation of Performance and Water Management Characteristics of a Bio Inspired Proton Exchange Membrane Fuel Cell Saripella, Bhaskar P.; Koylu, Umit O.; Leu, Ming C. A bioinspired proton exchange membrane (PEM) fuel cell with a flow field that mimics a leaf pattern is experimentally and computationally evaluated. Experiments are conducted using a transparent assembly for direct visualization of liquid water within the microchannels. Polarization and power curves are also obtained while advanced simulations are performed to predict distributions of pressure, velocity, and concentrations. The same measurements and computations are also performed for a single serpentine fuel cell. The results establish the superior water management and performance characteristics of the bioinspired fuel cell in comparison to a conventional one. They also help elucidate the underlying transport mechanisms, validate the computational models, and guide the optimization of bioinspired fuel cells.

2015-01-01T00:00:00Z Strong, Austin Thornberry, Courtney Beattie, Shane Chen, Rongrong Coles, Stuart R. http://yetl.yabesh.ir/yetl1/handle/yetl/158413 2018-01-27T11:35:06Z 2015-01-01T00:00:00Z

Depositing Catalyst Layers in Polymer Electrolyte Membrane Fuel Cells: A Review Strong, Austin; Thornberry, Courtney; Beattie, Shane; Chen, Rongrong; Coles, Stuart R. Fuel cell technology continues to advance and offers to be a potentially promising solution to many energy needs. Of particular interest are manufacturing techniques to improve performance and decrease overall cost. For catalyst deposition on the membrane electrode assembly (MEA), there are a number of techniques that have been used in the past decades. This paper aims to review many of these main techniques that have been published to show the wide variety of catalyst deposition methods.

2015-01-01T00:00:00Z