Can Renewables Provide Big Energy in America's Electric Future?

submitted by: RASEIBoulder
Renewable energy sources currently provide about only about 10% of the nation’s electricity, with most of that coming from large hydro sources. Renewable energy sources are scattered around the country, with much of the best wind and solar resources located in remote locations. These sources also may have a big footprint compared to conventional sources. Finally, solar and wind are often described as intermittent due to their variable and uncertain output. As a consequence, it is often...

Liquid Crystal Based Variable Light Attenuation for Switchable Solar Heat Gain Coefficient Application

submitted by: RASEIBoulder
Energy loss through the windows remains a dominant obstacle in obtaining zero-energy buildings. In particular, for mixed climate environments, the solar heat gain coefficient of a window must be switchable to control the amount of solar heating in the winter and summer seasons. Furthermore, it is desirable for the system not to consume energy from the grid and operate in an autonomous way. Finally, the system must be scalable and cost effective to retrofit existing windows. In this talk, we...

Feasibility Of Predominant Wind And Solar Energy Over The 48 United States

submitted by: RASEIBoulder
It is widely believed that wind and solar power are too variable in time to supply a large percentage of energy needs. This perception is based on wind and solar energy production over small domains, but is it true for a large domain? A study was conducted to determine the resource availability of wind and solar energy over the 48 US states. A meteorological assimilation model was used to estimate hourly wind and solar resources for three years – 2006 through 2008. Geographic data were...

Urban Power USA

submitted by: Garajan

Presentation about an innovative, low cost wind turbine using alternative aerodynamic principles to create electricity in urban, ocean, and other low or high wind environments.