Power and Energy Commons^™

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 …

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) …

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 …

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

Slides: Unido: Partner For Prosperity, Kandeh K. Yumkella

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

Presenter: Dr. Kandeh Yumkella, Chairman, UN Energy; Director General, United Nations Industrial Development Organization (UNIDO)

16 slides

Analysis Of Compensation Techniques Applied To The Control Of Converter Connected Synchronous Wind Turbines And Dfig’S During Grid Disturbances., Joseph Kearney, Michael Conlon, Eugene Coyle

Conference papers

This paper investigates control schemes to improve the performance of converter connected synchronous generators and DFIG’s to grid voltage unbalance and grid faults. Both the synchronous generator with a full converter and a DFIG are modelled in Matlab/Simulink. The control schemes of both turbines are modified to improve their performance during grid disturbances including grid voltage unbalance and single-phase faults. These disturbances are introduced into the models at specific times to analyse the performance of the wind generation systems. The performances of both systems to the grid disturbances are compared and the results are analysed.

An Energy Survey Of The Church Lane Building At Dit, Joseph Teehan

Other resources

Within the European Union, the collective governments have introduced broad energy policies in order to increase energy efficiency and improve energy performance in new and existing buildings, within each member state. The following dissertation considers energy and how energy is used within the context of global and local consumption in an extensive literature review. Where does the future lie for Ireland and its energy sources? Policies, standards and regulations associated with energy efficiency and the Energy Performance of Buildings Directive (EPBD) are defined and briefly explained. The status of how well the response from the commercial building market to Building …

Poly(Aniline/O-Nitroaniline): A High Capacity Cathode Material For Lithium Ion Batteries, Rui-Rui Zhao, Li-Min Zhu, Jiang-Feng Qian, Han-Xi Yang

Journal of Electrochemistry

Polyaniline can be used as a high capacity cathode material due to the advantages of material abundance and synthetic simplicity. However, its practical application in battery has been hindered by poor electrochemical utilization and cycling instability. To solve these problems, we synthesized the poly(aniline/o-Nitroaniline) (P(AN-oNA)) by introducing the electron-drawing group-nitroaniline onto the polyaniline chains, so as to enhance electrochemical utilization and stability of the polyaniline derivative. The as-prepared Li/P(AN-oNA) copolymer shows a greatly enhanced discharge capacities of 186 mAh·g^-1 at initial cycles, about 37% higher than its parent PAN, and remains 168 mAh·g^-1 after 60th cycle. Also, the …

Influences Of Particle Size And Sulfuric Acid Treatment On The Electrochemical Performance Of Bamboo Charcoal, Yu Yao, Ai-Shui Yu

Journal of Electrochemistry

The bamboo charcoal had been milled and treated by sulfuric acid. The influences of as-prepared material particle size and sulfuric acid treatment on the electrochemical performance had been studied. The result displays that the bamboo charcoal with mean particle size about 5 μm has the best first coulombic efficiency. Sulfuric acid treatment could raise the discharge capacity of bamboo charcoal, and the first discharge capacity of 328.2 mAh·g^-1 was obtained with the bamboo charcoal treated by sulfuric acid for 18 h. Furthermore, the capacity of 302.3 mAh·g^-1 could be maintained for 50 cycles, showing good cycle performance.