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Articles 1 - 7 of 7
Full-Text Articles in Mechanical Engineering
Robotic Manufacturing System For Unattended Machining And Inspection Of Graphite Bipolar Flow Field Plates For Proton Exchange Membrane Fuel Cells, Vladimir Gurau, Ryan Kent
Robotic Manufacturing System For Unattended Machining And Inspection Of Graphite Bipolar Flow Field Plates For Proton Exchange Membrane Fuel Cells, Vladimir Gurau, Ryan Kent
Department of Manufacturing Engineering Faculty Research and Publications
A single robot-based manufacturing system for unattended machining and inspection of graphite bipolar flow field plates for proton exchange membrane fuel cells is designed and integrated for demonstration and validation. Unlike most robotic manufacturing systems where an industrial robot is used for tending an automated tool such as a computer numerical control machine, in the present system the industrial robot performs all manufacturing operations, including machining the flow fields on both sides of the plates, changing the tools, handling the plates, vacuuming the plates and the workholding device of graphite dust, flipping the plates, air blowing them and performing machine …
Design Of A Methanol Reformer For On-Board Production Of Hydrogen As Fuel For A 3kw High-Temperature Proton Exchange Membrane Fuel Cell Power System, Vladimir Gurau, Adedayo Ogunleke, F. Strickland
Design Of A Methanol Reformer For On-Board Production Of Hydrogen As Fuel For A 3kw High-Temperature Proton Exchange Membrane Fuel Cell Power System, Vladimir Gurau, Adedayo Ogunleke, F. Strickland
Department of Manufacturing Engineering Faculty Research and Publications
The method of Computational Fluid Dynamics is used to predict the process parameters and select the optimum operating regime of a methanol reformer for on-board production of hydrogen as fuel for a 3 kW High-Temperature Proton Exchange Membrane Fuel Cell power system. The analysis uses a three reactions kinetics model for methanol steam reforming, water gas shift and methanol decomposition reactions on Cu/ZnO/Al2O3 catalyst. Numerical simulations are performed at single channel level for a range of reformer operating temperatures and values of the molar flow rate of methanol per weight of catalyst at the reformer inlet. Two operating regimes of …
Design And Demonstration Of Automated Technologies For The Fabrication And Testing Of Pem Fuel Cell Systems, Vladimir Gurau, Daniel Cox, Devin C. Fowler, Matthew Carter, Adedayo Ogunleke
Design And Demonstration Of Automated Technologies For The Fabrication And Testing Of Pem Fuel Cell Systems, Vladimir Gurau, Daniel Cox, Devin C. Fowler, Matthew Carter, Adedayo Ogunleke
Department of Manufacturing Engineering Faculty Research and Publications
This paper describes the research efforts at Georgia Southern University to develop robotic technologies for the fabrication of fuel cell components and stacks, as well as the design and fabrication of a High Temperature Proton Exchange Membrane Fuel Cell (HT-PEMFC) power system to be used as motive power and auxiliary power unit (APU) for a long range, unmanned, fully autonomous forest rover. The paper describes a manufacturing workcell consisting of a Yaskawa Motoman SDA5F dual arm robot with machine vision used for sorting, reorientation and stacking fuel cell components in presenters in preparation for their subsequent robotic assembly in fuel …
Bridging The Gap Between Automated Manufacturing Of Fuel Cell Components And Robotic Assembly Of Fuel Cell Stacks, Devin C. Fowler, Vladimir Gurau, Daniel Cox
Bridging The Gap Between Automated Manufacturing Of Fuel Cell Components And Robotic Assembly Of Fuel Cell Stacks, Devin C. Fowler, Vladimir Gurau, Daniel Cox
Department of Manufacturing Engineering Faculty Research and Publications
Recently demonstrated robotic assembling technologies for fuel cell stacks used fuel cell components manually pre-arranged in stacks (presenters). Identifying the original orientation of fuel cell components and loading them in presenters for a subsequent automated assembly process is a difficult, repetitive work cycle which if done manually, deceives the advantages offered by either the automated fabrication technologies for fuel cell components or by the robotic assembly processes. We present for the first time a robotic technology which enables the integration of automated fabrication processes for fuel cell components with a robotic assembly process of fuel cell stacks into a fully …
Engineering Of Bio-Mimetic Substratum Topographies For Enhanced Early Colonization Of Filamentous Algae, Ali Khoshkhoo, Andres L. Carrano, David M. Blersch, Kamran Kardel
Engineering Of Bio-Mimetic Substratum Topographies For Enhanced Early Colonization Of Filamentous Algae, Ali Khoshkhoo, Andres L. Carrano, David M. Blersch, Kamran Kardel
Department of Manufacturing Engineering Faculty Research and Publications
This work reveals a set of surface topography parameters that are significant for algal attachment to natural rock substrata. Topography analysis of rock surfaces from a stream identifies three descriptive areal parameters (Smr, Sv, and Sa) that correlate with the presence of natural periphyton community. A method was developed and validated to reverse engineer and manufacture artificial substrata with topographic complexity defined by these parameters, using computational modeling and additive manufacturing. Results from colonization experiments with filamentous algae show statistically significant increases in early biomass accrual rates on substrata with higher values of …
Micro-Ct Evaluation Of Defects In Ti-6al-4v Parts Fabricated By Metal Additive Manufacturing, Haijun Gong, Venkata Karthik Nadimpalli, Khalid Rafi, Thomas Starr, Brent Stucker
Micro-Ct Evaluation Of Defects In Ti-6al-4v Parts Fabricated By Metal Additive Manufacturing, Haijun Gong, Venkata Karthik Nadimpalli, Khalid Rafi, Thomas Starr, Brent Stucker
Department of Manufacturing Engineering Faculty Research and Publications
In this study, micro-computed tomography (CT) is utilized to detect defects of Ti-6Al-4V specimens fabricated by selective laser melting (SLM) and electron beam melting (EBM), which are two popular metal additive manufacturing methods. SLM and EBM specimens were fabricated with random defects at a specific porosity. The capability of micro-CT to evaluate inclusion defects in the SLM and EBM specimens is discussed. The porosity of EBM specimens was analyzed through image processing of CT single slices. An empirical method is also proposed to estimate the porosity of reconstructed models of the CT scan.
Rheological Properties Of Two Stainless Steel 316l Powders For Additive Manufacturing, Haijun Gong, Xiaodong Xing, Hengfeng Gu
Rheological Properties Of Two Stainless Steel 316l Powders For Additive Manufacturing, Haijun Gong, Xiaodong Xing, Hengfeng Gu
Department of Manufacturing Engineering Faculty Research and Publications
This study measures the rheological properties of two stainless steel 316L powders which are used for the powder-bed-fusion based additive manufacturing process. The purpose is to evaluate the newly acquired powder in comparison with the used and recycled powder, so that both powders can be mixed with each other to supplement the powder usage. The powder rheology properties, such as dynamic property, bulk property, and shear property, are tested and compared. The results and analysis confirm the compatibility of powder mixing.