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Renewable Energy

  • Wind turbine bat mortality Featured Article Wind turbine bat mortality Wind turbine bat mortality

    Wind turbine bat mortality is a significant adverse impact of large scale wind energy development. Wind energy has become an increasingly important sector of the renewable... More »

  • Photovoltaic energy valuation model Featured Article Photovoltaic energy valuation model Photovoltaic energy valuation model

    Photovoltaic Energy Valuation Model Sandia National Laboratories in collaboration with Solar Power Electric™ has developed PV ValueTM, an electronic form to... More »

  • Biomass Featured Article Biomass Biomass

    Biomass is a term in ecology for the  mass of living organisms in a given ecosystem.  Biomass can refer to the living stock of species in a given habitat, but can... More »

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Agriculture-based biofuels Last Updated on 2013-09-30 14:20:59 Summary Since the late 1970s, U.S. policymakers at both the federal and state levels have enacted a variety of incentives, regulations, and programs to encourage the production and use of agriculture-based biofuels. Initially, federal biofuels policies were developed to help kick-start the biofuels industry during its early development, when neither production capacity nor a market for the finished product was widely available. Federal policy has played a key role in helping to close the price gap between biofuels and cheaper petroleum fuels. Now, as the industry has evolved, other policy goals (e.g., national energy security, climate change concerns, support for rural economies) are cited by proponents as justification for continuing policy support. The U.S. biofuels sector has responded to these government incentives by expanding output every year since 1996, with important... More »
Land use profile of China Last Updated on 2013-08-25 16:46:51 The story of land use in China over the last century is as dramatic as the tale of the country's radical economic transformation. Endless acres of rural lands, that just a few decades ago were farmed by peasant collectives as part of Mao Zedong's massive agricultural campaigns, today host brand new condominium developments, as China's cities rapidly fan out past their existing boundaries. Giant factories dot the countryside in even the most remote provinces and manufacture all sorts of goods for export into the international market. In many ways, this process of shifting landscapes indicates an accumulation of wealth in regions that still suffer considerably from high poverty rates. The human cost of the rural construction boom can often be measured in the number of displaced peasant families, who typically have little recourse to prevent the repurposing of their... More »
Bioenergy: Chances and Limits Last Updated on 2012-07-26 10:38:28 This report from the German National Academy of Sciences Leopoldina has come to the conclusion that in quantitative terms, bioenergy plays a minor role in the transition to renewable, sustainable energy sources in Germany at the present time and probably into the future. Bioenergy – Chances and Limits The Leopoldina’s statement “Bioenergy – Chances and Limits” [Bioenergie: Möglichkeiten und Grenzen] provides a comprehensive analysis of the use of bioenergy.  It was compiled by a working group of more than 20 expert scientists established in 2010 and outlines under which conditions the utilization of bioenergy is appropriate. In recent years Germany has seen a steady rise in the number of energy crops being cultivated for the production of biofuels and biogas. Because bioenergy is so versatile and easy to store, the German... More »
Night-warming effect over large wind farms Last Updated on 2012-05-01 00:00:00 Study indicates that land surface temperatures have warmed in the vicinity of large wind farms in west-central Texas, especially at night, Scientists Find Night-Warming Effect Over Large Wind Farms in Texas Wind turbines interact with atmospheric boundary layer near the surface Large wind farms in certain areas in the United States appear to affect local land surface temperatures, according to a paper published today in the journal Nature Climate Change. The study, led by Liming Zhou, an atmospheric scientist at the State University of New York- (SUNY) Albany, provides insights about the possible effects of wind farms. The results could be important for developing efficient adaptation and management strategies to ensure long-term sustainability of wind power. "This study indicates that land surface temperatures have warmed in the vicinity of large wind farms in... More »
Photovoltaic energy valuation model Last Updated on 2012-02-01 00:00:00 Photovoltaic Energy Valuation Model Sandia National Laboratories in collaboration with Solar Power Electric™ has developed PV ValueTM, an electronic form to standardize appraisals of homes and businesses outfitted with photovoltaic (PV) installations. While the tool is licensed for solar PV installations, it could be used for other large green features in a home that generate income, such as wind turbines. The spreadsheet, user manual and webinar explaining the tool are available for download at http://pv.sandia.gov/pvvalue. The tool has been designed to be used by real estate appraisers, mortgage underwriters, credit analysts, real property assessors, insurance claims adjusters and PV industry sales staff.  For appraisers, the inputs specific to PV in the Residential Green and Energy Efficient Addendum can be used as inputs to PV Value™. Valuing a PV... More »