A5028296381- Fuel Cells and Related Materials
- Electrocatalysts for Energy Conversion
- Refrigeration and Air Conditioning Technologies
- Advanced battery technologies research
- Heat Transfer and Optimization
- Advancements in Solid Oxide Fuel Cells
- Hydrogen Storage and Materials
- Advanced Thermodynamics and Statistical Mechanics
- Hybrid Renewable Energy Systems
- Building Energy and Comfort Optimization
- Thermodynamic and Exergetic Analyses of Power and Cooling Systems
- Nanofluid Flow and Heat Transfer
- Algal biology and biofuel production
- Ammonia Synthesis and Nitrogen Reduction
- Infection Control and Ventilation
- Renewable energy and sustainable power systems
- Solar Thermal and Photovoltaic Systems
- Adsorption and Cooling Systems
- Heat Transfer Mechanisms
- Forest Biomass Utilization and Management
- Membrane Separation and Gas Transport
- Carbon Dioxide Capture Technologies
- Biodiesel Production and Applications
- Ranque-Hilsch vortex tube
- Environmental Impact and Sustainability
Adventist University of Health Sciences
2023-2025
Universidade Federal do Paraná
2020-2023
Andrews University
2017-2021
University of Pretoria
2014-2017
Florida State University
2009-2016
This paper aims to produce a dynamic model that is computationally fast predict the response of single AMFC according variations physical properties materials, and operating design parameters. The based on electrochemical principles, mass, momentum, energy species conservation. It also takes into account pressure drop in gas channels temperature gradient with respect space flow direction. simulation results comprise distribution, net power polarization curves, which were experimentally...
The architecture of heat exchangers is a classical subject that has been studied extensively in the past. In this paper, we address fundamental question what size exchanger should be, addition to architectural features it have. answer follows from tradeoff between (1) useful power lost because transfer and fluid flow (2) destroyed during transportation, manufacturing, maintenance. Changes induce changes opposite sign requirements (2). This regarding illustrated by considering one side (one...
Summary This study optimizes numerically the relative sizes, spacings (internal structure), and aspect ratios (external configuration) of a single alkaline membrane fuel cell for maximum net power. The (AMFC) cellulosic brings new light to possibility having cells that are nontoxic asbestos free as compared with static electrolyte use an separator ammonium-based anion-exchange membranes. A dimensionless dynamic mathematical model is utilized in process, results presented normalized charts...
This paper introduces a structured procedure to optimize the internal structure (relative sizes, spacing) and external shape (aspect ratios) of single alkaline membrane fuel cell so that net power is maximized.The optimization flow geometry conducted for smallest (elemental) level stack, i.e., cell, which modeled as unidirectional system.The polarization curve, total power, efficiency are obtained functions temperature, pressure, electrolyte solution concentration (KOH), operating...
A great technological advent is the use of renewable energies with objective promoting migration world energy matrix. For this, alternatives to generate and store are sought. Among them, hydrogen stands out - most abundant chemical element in our universe produced from various sources, such as natural gas, biomass water electrolysis, making it a viable option fuel, addition being considered source clean energy, its burning does not emit gases carbon dioxide (CO2), one main responsible for...
A mathematical model of a sustainable H2 generation reactor that utilizes aluminum and seawater is introduced. Conservation species the kinetics production reaction from allowed for obtaining process transient response in batch reactor. Continuous steady state was assessed by adding balance energy, allowing reactants inlet mass flow rates, calculating outlet (generation) rate. The theoretical curve data showed good quantitative qualitative agreement with experimental data. validated then...
Abstract Hydrogen was generated in situ a reactor with aluminum scrap and water together NaOH as catalyst. CO 2 ‐free air obtained by filtering atmospheric KOH solution. A fuel cell stack prototype four cells, H ‐generator, cleaning device demonstrated the concept. Direct voltage power evaluated operation. The results showed that had performance 18% smaller than pure , is, 3.77 V ( I = 0 A), 2.70 W were obtained. Experimental data used to validate sustainable (sustainable alkaline membrane...
When geometric parameters, such as volume and thickness, are constraints to be considered in real applications an increase of performance is required, other parameters must taken into account for the optimization fuel cells. The physical properties bipolar plates, electrodes, membranes some that can still studied when maximum power output sought under constraint. This paper investigated influence porosity diffusive reaction layers on alkaline membrane cell (AMFC). An experimentally validated...
This paper presents a three-dimensional geometric optimisation of conjugate cooling channels in forced convection with internal heat generation within the solid. Pentagonal configuration are considered. The main objective is to optimise such way that peak temperature minimised subject constraint fixed global volume solid material. fluid driven through by pressure difference across channel. elemental structure and hydraulic diameter channel were considered as design variables. shape allowed...
The whole world has been suffering strong consequences related to climate change. intense use of fossil fuels in the chemical and automotive industries have put environment jeopardy. Thus, industry achieved a point no return it is urgent development renewable sustainable technologies. Hydrogen pointed as key component new era since can be produced clean way. Currently hydrogen fuel cells technology sector ahead relation studies regarding production. Chemical produce with technologies reliant...