Power and Energy Commons^™

Voltage Flicker Evaluation For Wave Energy Converters – Assessment Guidelines, Fergus Sharkey, Elva Bannon, Joe Macenri, Kevin Gaughan, Michael Conlon

Conference papers

Voltage flicker is a power quality problem caused by regularly oscillating active and reactive power either from a load or generator. The regular power oscillations induce a voltage change at the grid connection which is proportional to the amplitude of the power oscillation and at the same frequency. The impedance of the grid (grid strength) at the point of connection is a factor in the amplitude of the voltage oscillation. The frequency band of interest for flicker evaluation is from 0.01-20Hz, and is most severe at 8.8Hz. The frequency of the primary resource for wave energy converters lies within this …

Practical Analysis Of Key Electrical Interfaces For Wave Energy Converter Arrays, Fergus Sharkey, Michael Conlon, Kevin Gaughan

Conference papers

The authors have previously outlined a proposed path for the development of electrical networks for deepwater wave farms. This path broadly followed that of offshore wind farms as the least cost solution. The main differences between wind farm and wave farm electrical networks were identified as the method of installation and maintenance and the components at the WEC interface with the electrical network. Components such as dynamic cables, submarine connectors, submarine switchgear all form part of these interfaces. This paper examines the key electrical interfaces for WEC arrays such as the dynamic cable to WEC interface, dynamic cable to static …

Advancing The Beamed Energy Ablation Driven Propulsion Engine Concept, Grant Bergstue

Von Braun Symposium Student Posters

No abstract provided.

Development And Implementation Of A Calibration Procedure For Complex Impedance Spectrum Measurements With Applications To Embedded Battery Health Monitoring And Management Systems, William H. Morrison

Master's Theses

Energy storage devices such as rechargeable Lithium ion batteries are assuming an increasingly prominent role in society, covering applications from electric / hybrid electric vehicles to personal portable electronics. In response to this increasing demand, technologies that monitor battery health and remaining useful life have developed. One such system is the Smart Battery Status Monitor (SBSM), developed by the Idaho National Laboratory, Montana Tech and Qualtech Systems, Inc. The SBSM utilizes impedance spectrum measurements using a subsystem called the Impedance Measurement Box (IMB). The impedance measurements are complex quantities (having both a resistive and a reactive component) and are made …

Modeling Leakage Currents In Metal Insulator Metal Structures With High K Materials, Priyamvada Maleeswaran

Electrical & Computer Engineering Theses & Dissertations

Various products such as personal computers, cellular phones and mobile devices require high speed and low power consumption. Such improvements have been attained by minimizing physical dimensions of electronic devices, leading to high density integration of transistors and capacitors on integrated chips (]Cs). However, as a consequence of down-scaling device dimensions, tunneling of electrons through thin gate oxides (SiO₂) increases, leading to increased static power leakage. This constitutes wastage in power, and for the case of memory applications necessitates faster refresh cycles. In order to overcome such issues, high-k materials (such as HfO₂ and ZrO₂) …

Design And Test Of A Linear Switched Reluctance Generator For Use In Wave-Energy Applications, Garret Brady, Cathal O'Loughlin, John Massey, David Griffiths, Carlos Villegas

Conference Papers

This paper describes the design of a double-sided linear switched reluctance generator for use in wave energy applications, and the build and test of a working bench-scale prototype. Beginning with a standard shape, the development of the design, from concept to detail, is presented. Numerical simulation results – magnetic, mechanical and electrical – inform the detailed design. Construction of the generator and test rig is described. Experimental results give good agreement with simulation predictions.

Nonthermal Plasma Jet Efficacy On Candida Kefyr, Amber Marie Mattson Jackson

Electrical & Computer Engineering Theses & Dissertations

The inactivation abilities of a nonthermal plasma jet were investigated with the yeast C. kefyr, a pathogen with increasing importance in healthcare. The plasma is generated using a microhollow cathode discharge (MHCD) geometry operated with a DC voltage of 2 kV and a current of 30 mA using air as the operating gas at an airflow rate of 8 SLM. The plasma discharge approaches room temperature at a few mm away from the plasma jet allowing for the use on heat sensitive surfaces. Dry air and humid air were used as the operating gas to see if humidity plays …

Fault Detection System For Solar Tracking Applications, Hareen Sekhar Illa

Electrical & Computer Engineering Theses & Dissertations

Oil, coal and natural gas reserves are being depleted faster than forecasted due to continued increase in demand for energy sources. We need, therefore, to develop renewable energy sources, such as solar, wind, biomass, geothermal, hydro power and tidal energy. In spite of having very high potential, harvesting solar energy has been a challenge because of the relatively low efficiency of solar cells. In the past few years different methods have been developed to increase the efficiency of the photovoltaic (PV) system: (I) improve the efficiency of solar cells (ill use a solar tracking system to increase the received solar …

Slides: What Laundry Can Teach Us: Five Principles For New Business Models, Teju Ravilochan

2012 Energy Justice Conference and Technology Exposition (September 17-18)

Presenter: Teju Ravilochan, CEO, The Unreasonable Institute

17 slides

Slides: Envirofit: Making The World Fit For Humanity, Jessica Alderman

2012 Energy Justice Conference and Technology Exposition (September 17-18)

Presenter: Jessica Alderman, Director, ENVIROFIT

15 slides

Slides: Multi-Dimensional Energy Poverty Index (Mepi), Morgan Bazilian

2012 Energy Justice Conference and Technology Exposition (September 17-18)

Presenter: Dr. Morgan Bazilian, Deputy Director, Joint Institute for Strategic Energy Analysis (JISEA), National Renewable Energy Laboratory (NREL)

8 slides

Agenda: 2012 Energy Justice Conference And Technology Exposition, University Of Colorado Boulder. Center For Energy & Environmental Security, University Of Colorado Boulder. Colorado European Union Center Of Excellence, University Of Colorado Boulder. Presidents Leadership Institute

2012 Energy Justice Conference and Technology Exposition (September 17-18)

Co-sponsored with the Colorado European Union Center of Excellence and the Presidents Leadership Institute at the University of Colorado Boulder.

The ability to harness energy is fundamental to economic and social development. Worldwide, almost 3 billion people have little or no access to beneficial energy resources for cooking, heating, water sanitation, illumination, transportation, or basic mechanical needs. Energy poverty exacerbates ill health and economic hardship, and reduces educational opportunities, particularly for women and children. Specifically, access to efficient and affordable energy services is a prerequisite for achieving the Millennium Development Goal (MDG) relating to poverty eradication.

In response, the UN …

Slides: Appropriate Sustainable Energy Technologies: A Light To The World, Lakshman D. Guruswamy, Jason B. Aamodt, Blake Feamster

2012 Energy Justice Conference and Technology Exposition (September 17-18)

Presenter: Jason Aamodt, Attorney; Adjunct Professor, University of Tulsa

15 slides

Slides: Meeting The Needs Of Women Through Clean Cooking Solutions, Corinne Hart

2012 Energy Justice Conference and Technology Exposition (September 17-18)

Presenter: Corinne Hart, Program Manager, Gender and Markets, Global Alliance for Clean Cookstoves

20 slides

Slides: Draft Power In Developing Country Agriculture--South Asia, Arjun Makhijani

2012 Energy Justice Conference and Technology Exposition (September 17-18)

Presenter: Dr. Arjun Makhijani, President, Institute for Energy and Environmental Research (IEER)

13 slides

Slides: Sources Of Electrical Energy For Those Who Are Remote And Poor, Frank Barnes

2012 Energy Justice Conference and Technology Exposition (September 17-18)

Presenter: Dr. Frank Barnes, Distinguished Professor, Electrical, Computer, and Energy Engineering, University of Colorado

24 slides

Slides: Impacts Of Energy Deficits In Cooking, Illumination, Water, Sanitation, And Motive Power, Paul S. Chinowsky

2012 Energy Justice Conference and Technology Exposition (September 17-18)

Presenter: Dr. Paul Chinowsky, Director, Mortenson Center in Engineering for Developing Communities; Professor, University of Colorado

25 slides

Slides: The Green Climate Fund: Challenges And Opportunities: Some Thoughts On How The Green Climate Fund Could Close The Energy Justice Gap, Martin Hiller

2012 Energy Justice Conference and Technology Exposition (September 17-18)

Presenter: Martin Hiller, Director‐General, Renewable Energy and Energy Efficiency Partnership (REEEP), Vienna, Austria

22 slides

Slides: Nokero: Power To The Powerless, Stephen Katsaros

2012 Energy Justice Conference and Technology Exposition (September 17-18)

Presenter: Stephen Katsaros, Inventor, Founder, and CEO, Nokero

13 slides

Slides: Session 3: Decision-Making And The Energy Poor, Andrew Yager

2012 Energy Justice Conference and Technology Exposition (September 17-18)

Presenter: Andrew Yager, United Nations Department of Economic and Social Affairs, Division for Sustainable Development

33 slides