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...

Clean Energy and the Environment in America: The Colorado Story

submitted by: RASEIBoulder
The Center’s Director, Bill Ritter, was elected as Colorado’s 41st governor in 2006 - the first Colorado-born governor in more than 35 years. He quickly established Colorado as a national and international leader in clean energy by creating a New Energy Economy and tripling the state’s renewable energy portfolio. In a state with substantial fossil energy as well as renewable energy resources, Gov. Ritter created policies that balanced energy production with protection of air, land,...

Addressing the Challenge of Truly Large Scale Photovoltaics

submitted by: RASEIBoulder
Addressing the Challenge of Truly Large Scale Photovoltaics: the Industrial and Thermodynamic Potentials of Organic Solar Cells In order for photovoltaic systems to ultimately provide a considerable fraction of the world’s energy needs they will need to meet a number of stringent performance metrics regarding their cost, efficiency, and robustness. In addition, they will need to be manufactured with very high throughput methods in order to realize the enormous production scales...

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...

Re-evaluating The Hubbert Curve And The Global Petroleum Revolution: A New Era - Details

submitted by: RASEIBoulder
Summary: Why have the predicted global oil and natural gas shortages and demise of civilization by 2010 related to these vanishing supplies not occurred? The static view has created a pessimistic outlook based on historical perspective such as the Hubbert curve analysis which results in the inescapable and inevitable depletion that will result in catastrophic consequences for civilization. A new paradigm, a dynamic or petroleum system view demonstrates a different and more optimistic...

High-altitude Wind Energy Generation

submitted by: RASEIBoulder
Sustainable energy generation is one of the most urgent challenges that mankind is facing nowadays. Many countries have set ambitious objectives to increase the share of energy produced from clean and renewable sources. Unfortunately, the actual renewables are still not competitive with respect to fossil fuels, due to the high costs of the related technologies, their variable and non-uniform availability and their low power density per unit area. Thus, a breakthrough would be needed in...

Energy Efficiency In Buildings And Heat Supply Solutions: A German Perspective For The Nuclear Shutdown

submitted by: RASEIBoulder
Beginning with some background information on the unique German position regarding the energy supply eliminating any nuclear power by 2022 but enforcing the use of renewable energy sources, the challenges for both the building and the power generation sector will be highlighted. The talk will introduce opportunities to improve energy performance of buildings by new and innovative HVAC concepts as well as for increasing the penetration of renewable and environmental energy sources for heat...

Cleaner Fossil Fuels

submitted by: RASEIBoulder
Authors: Dag Nummedal. Reduction of carbon emissions and enhancement of national energy security are desirable goals. Discussions of how to realize these goals, however, generate a lot of heated debate – not all of it illuminating. An accelerated switch to renewable energy may seem like a logical push, yet the vastness of the global energy system is such that even the most optimistic scenarios for development of renewables are not going to bring about a cleaner atmosphere fast enough....

Economic Limits to Oil Supply: A Non-Hubbert Curve View

submitted by: RASEIBoulder
Authors: Richard S. Bishop and Wayne L. Kelley. Historically, questions of oil supply have been addressed by citing volumes of reserves and/ or resources. Supply, however, cannot be estimated from volumes alone but must include economic considerations. An optimistic outlook on global oil supply commonly will include large volumes of unconventional resources or undiscovered fields. While very large` such resources cannot add proportionately large supply rates due to logistical limitations,...