Hydrokinetic energy to power our future

submitted by: nsf

Researchers at the University of Minnesota taught kids the science behind hydrokinetic energy at the USA Science and Engineering Festival.

Harvesting Electricity: Triboelectric Generators Capture Wasted Power

submitted by: nsf

With one stomp of his foot, Zhong Lin Wang illuminates a thousand LED bulbs--with no batteries or power cord. A professor at the Georgia Institute of Technology, Wang is using what’s technically known as the triboelectric effect to create surprising amounts of electric power by rubbing or touching two different materials together.

Source: Georgia Institute of Technology

Drive Train Innovations for the Next Generation of Wind Turbines

submitted by: RASEIBoulder
Summary: As tax credits expire for wind energy, the ability to compete with established energy sources is critical. All wind turbine manufacturers are examining their next generation turbines with an eye towards reducing their cost, increasing energy production, and improving reliability. Because the drive train accounts for such a large part of the rotor nacelle assembly cost, it has become a prime target for design change. Drive train innovations which reduce cost, increase energy...

Approaches to Evaluating and Improving Lithium-Ion Battery Safety

submitted by: RASEIBoulder
As lithium-ion battery technologies mature, the size and energy of these systems continues to increase for emerging applications in transportation, grid storage, military use and aerospace. In fact, broadening the application space for lithium-ion batteries from the consumer electronics industries to these emerging markets increases their size from 1-50 Wh batteries for smart phones and laptops to >50 kWh for electric vehicles (EVs) and MWh scale for utility storage systems. As these...

Making Most of the Absorbed Photon: New Insights into Carrier Multiplication in Semiconductor Nanostructures

submitted by: RASEIBoulder
Carrier multiplication (CM) or multiexciton generation (MEG) is a process whereby absorption of a single photon produces multiple electron-hole pairs (excitons). CM could benefit a number of solar-energy conversion technologies, most notably photocatalysis and photovoltaics. This presentation overviews recent progress in understanding of the CM process in semiconductor nanocrystals, motivated by an outstanding challenge in this field - the lack of capability to quickly discern between...

New Perspectives of Energy Storage Materials

submitted by: RASEIBoulder
Summary: Energy storage in the electrochemical form is attractive because of its high efficiency and fast response time. New and improved materials for energy storage are urgently required to make more efficient use of our finite supply of fossil fuels, and to enable the effective use of renewable energy sources. In this seminar, I will discuss a few new perspectives for energy storage materials including new Li intercalation compounds, new Na intercalation compounds and new...

Directed Assembly of Anisotropic Particles - Fundamentals and Energy-related Applications

submitted by: RASEIBoulder
Summary: Spherical colloids with isotropic properties have been used as building blocks to assemble a variety of 2D and 3D structures in past, such as FCC, HCP, and BCT crystals. Anisotropic particles are, however, more faithful mimics of molecules and atoms because of the anisotropic interactions. Current synthetic methods are versatile and accurate enough to create and tune the anisotropic properties in geometry, chemical composition, surface functionality, and physical properties. In the...

Control of Power Inverters in Renewable Energy and Smart Grid Integration

submitted by: RASEIBoulder
Summary: Renewable energy sources have been regarded as the most promising means to solve the energy and environmental issues we face nowadays. How to integrate renewable energy into smart grids presents many challenging problems in control and power electronics. A well-integrated smart grid provides the backbone for the high-level functions of smart grids, such as wide-area control, communication, information, marketing and security. In this talk, an overview of the enabling technologies...

The Changing Energy Mix

submitted by: RASEIBoulder
Summary: Transitioning to a sustainable low-carbon energy system poses one of the great challenges of the 21st century. The Energy Innovation Series brings leaders from government, law, finance, industry, and academia to discuss key aspects of this challenge and some of the innovative approaches and solutions being fashioned across a range of sectors. During academic year 2012-13, the series will focus on the changing energy mix in the United States and abroad, the implications of shale gas...

The Changing Energy Mix, Transmission, Storage, and Distributed Generation

submitted by: RASEIBoulder
Summary: Transitioning to a sustainable low-carbon energy system poses one of the great challenges of the 21st century. The Energy Innovation Series brings leaders from government, law, finance, industry, and academia to discuss key aspects of this challenge and some of the innovative approaches and solutions being fashioned across a range of sectors. During academic year 2012-13, the series will focus on the changing energy mix in the United States and abroad, the implications of shale gas...