Energy and Water


Book Description

Energy and Water: Preliminary Observations on the Links between Water and Biofuels and Electricity Production




Energy and Water: Preliminary Observations on the Links Between Water and Biofuels and Electricity Production


Book Description

Water and energy are inexorably linked -- energy is needed to pump, treat, and transport water and large quantities of water are needed to support the development of energy. Two examples that demonstrate the link between water and energy are the cultivation and conversion of corn, switchgrass, and algae into biofuels; and the production of electricity by thermoelectric power plants. There are three ongoing studies focusing on the water-energy nexus related to: (1) biofuels and water; (2) thermoelectric power plants and water; and (3) oil shale and water. This testimony provides the key themes that have emerged from work to date on the R&D and data needs with regard to the production of biofuels and electricity and their linkage with water.




Energy-Water Nexus


Book Description

In 2000, thermoelectric power plants accounted for 39 percent of total U.S. freshwater withdrawals. Traditionally, power plants have withdrawn water from rivers and other water sources to cool the steam used to produce electricity, so that it may be reused to produce more electricity. Some of this water is consumed, and some is discharged back to a water source. In the context of growing demands for both water and electricity, this report discusses: (1) approaches to reduce freshwater use by power plants and their drawbacks; (2) states' consideration of water use when reviewing proposals to build power plants; and (3) the usefulness of federal water data to experts and state regulators. Includes recommendations. Charts and tables.




Florida's Water


Book Description

Florida's Water poses fundamental questions about water sustainability in the United States' fourth largest state. Florida has long-standing water quality problems. Global climate change threatens to intensify Florida's floods and droughts, make hurricanes more common or more damaging, and eventually submerge much of low-lying Florida, including the Everglades. How can Florida meet these extraordinary challenges? And what lessons does the Florida experience hold for other states? This book fully integrates the many diverse responsibilities of water management into a readable and compelling combination of interesting narratives and deep analysis. Author Tom Swihart's unique, intimate knowledge of Florida's successes and failures in water management brings out both the novelty of Florida's water situation and the features that it has in common with other states.







Sustainable Development of Algal Biofuels in the United States


Book Description

Biofuels made from algae are gaining attention as a domestic source of renewable fuel. However, with current technologies, scaling up production of algal biofuels to meet even 5 percent of U.S. transportation fuel needs could create unsustainable demands for energy, water, and nutrient resources. Continued research and development could yield innovations to address these challenges, but determining if algal biofuel is a viable fuel alternative will involve comparing the environmental, economic and social impacts of algal biofuel production and use to those associated with petroleum-based fuels and other fuel sources. Sustainable Development of Algal Biofuels was produced at the request of the U.S. Department of Energy.




Renewable Energy Sources and Climate Change Mitigation


Book Description

This Intergovernmental Panel on Climate Change Special Report (IPCC-SRREN) assesses the potential role of renewable energy in the mitigation of climate change. It covers the six most important renewable energy sources - bioenergy, solar, geothermal, hydropower, ocean and wind energy - as well as their integration into present and future energy systems. It considers the environmental and social consequences associated with the deployment of these technologies, and presents strategies to overcome technical as well as non-technical obstacles to their application and diffusion. SRREN brings a broad spectrum of technology-specific experts together with scientists studying energy systems as a whole. Prepared following strict IPCC procedures, it presents an impartial assessment of the current state of knowledge: it is policy relevant but not policy prescriptive. SRREN is an invaluable assessment of the potential role of renewable energy for the mitigation of climate change for policymakers, the private sector, and academic researchers.




Total Factor Productividty Growth in Agriculture


Book Description

In this chapter we compute measures of total factor productivity (TFP) growth for developing countries and then contrast TFP growth with technological capital indexes. In developing these indexes, we incorporate schooling capital to yield two new indexes: Invention-Innovation Capital and Technology Mastery. We find that TFP performance is strongly related to technological capital and that technological capital is required for TFP and cost reduction growth. Investments in technological capital require long-term (20- to 40-year) investments, which are typically made by governments and aid agencies and are the only viable escape route from mass poverty.




Electricity from Renewable Resources


Book Description

A component in the America's Energy Future study, Electricity from Renewable Resources examines the technical potential for electric power generation with alternative sources such as wind, solar-photovoltaic, geothermal, solar-thermal, hydroelectric, and other renewable sources. The book focuses on those renewable sources that show the most promise for initial commercial deployment within 10 years and will lead to a substantial impact on the U.S. energy system. A quantitative characterization of technologies, this book lays out expectations of costs, performance, and impacts, as well as barriers and research and development needs. In addition to a principal focus on renewable energy technologies for power generation, the book addresses the challenges of incorporating such technologies into the power grid, as well as potential improvements in the national electricity grid that could enable better and more extensive utilization of wind, solar-thermal, solar photovoltaics, and other renewable technologies.




Climate Impacts on Energy Systems


Book Description

"While the energy sector is a primary target of efforts to arrest and reverse the growth of greenhouse gas emissions and lower the carbon footprint of development, it is also expected to be increasingly affected by unavoidable climate consequences from the damage already induced in the biosphere. Energy services and resources, as well as seasonal demand, will be increasingly affected by changing trends, increasing variability, greater extremes and large inter-annual variations in climate parameters in some regions. All evidence suggests that adaptation is not an optional add-on but an essential reckoning on par with other business risks. Existing energy infrastructure, new infrastructure and future planning need to consider emerging climate conditions and impacts on design, construction, operation, and maintenance. Integrated risk-based planning processes will be critical to address the climate change impacts and harmonize actions within and across sectors. Also, awareness, knowledge, and capacity impede mainstreaming of climate adaptation into the energy sector. However, the formal knowledge base is still nascent?information needs are complex and to a certain extent regionally and sector specific. This report provides an up-to-date compendium of what is known about weather variability and projected climate trends and their impacts on energy service provision and demand. It discusses emerging practices and tools for managing these impacts and integrating climate considerations into planning processes and operational practices in an environment of uncertainty. It focuses on energy sector adaptation, rather than mitigation which is not discussed in this report. This report draws largely on available scientific and peer-reviewed literature in the public domain and takes the perspective of the developing world to the extent possible."