Search Results for renewables
64 item(s) were returned.
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EROI of different fuels and the implications for society

Author(s): OurEnergyPolicy.org
Administrator
OurEnergyPolicy.org
Date: March 12, 2015 at 1:48 PM

Full Title: EROI of different fuels and the implications for society Author(s): Charles A.S. Hall, Jessica G. Lambert, Stephen B. Balogh Publisher(s): Elsevier, Energy Policy Publication Date: 2014 Full Text: ->DOWNLOAD DOCUMENT<- Description (excerpt): All forms of economic production and exchange involve the use of energy directly and in the transformation of materials. Until recently, cheap and seemingly limitless fossil energy has allowed most of society to ignore the importance of contributions to the economic process from the biophysical world as well as the potential limits to growth. This paper centers on assessing the energy costs of modern day society and its relation… [more]

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Will There Be Sufficient Electricity?

Author(s): Herschel Specter
President
Micro-Utilities, Inc.
Date: September 11, 2014 at 9:56 AM

An analysis has been made to determine if there would be enough electricity in the US by 2050 to support a carbon-free future to avoid the worst effects of climate change. Assuming that carbon capture and sequestration is not practical, a mix of nuclear and renewable energy power plants was examined. Existing fossil power plants and nuclear plants represent 86% of the electricity that was produced in 2012. By 2050, to be carbon-free, all of these fossil plants would have to be phased out, while all present nuclear plants would have reached the end of their operating licenses. According to… [more]

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The Challenges Of Integrating Renewables On To The Grid

Author(s): Duncan Callaway
Assistant Professor, Energy and Resources Group
University of California, Berkeley
Date: August 14, 2014 at 9:20 AM

Wind and solar capacity have grown significantly in the last decade, and many believe that significant reductions in carbon emissions require continued expansion of their capacity (see for example recent papers by Jim Williams et al and Jimmy Nelson et al[1]). With the declining cost of wind and solar, the economic case for increasing production from sources whose fuel is free is getting better. But getting these energy sources on to the grid is not without its engineering and economic challenges. Wind and solar production is both variable and uncertain, and grid system operators need to make sure they have… [more]

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Clean Energy Poised for Market Domination or More Innovation Needed?

Author(s): Matthew Stepp
Senior Policy Analyst
Information Technology and Innovation Foundation
Date: May 30, 2014 at 11:15 AM

Whether or not the world has all of the clean energy technologies it needs to dramatically cut greenhouse gas emissions is an important ongoing debate among the climate policy community. Buoyed by steep cost reductions for wind and solar power technologies during the past decade, proponents argue political will is the major factor holding clean energy back from dominating the global energy market. Critics counter that even with recent cost reductions clean energy still isn’t realistically competitive with fossil fuels everywhere without the help of unsustainable subsidies and contentious government mandates. The debate over whether clean energy is ready for… [more]

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Hydropower: The Silent and Aging Renewable

Author(s): Nate Sandvig
President
Clean Energy Development, LLC
Date: April 28, 2014 at 10:53 AM

Often termed the country’s “silent renewable,” hydropower is the nation’s largest renewable electricity resource, providing 7% of total generation. Hydropower’s many supporters – 81% of U.S. voters favor maintaining existing hydro, according to a recent National Hydropower Association poll – value its low-cost, reliability and ability to integrate intermittent renewable resources.  Critics argue that hydropower is not environmentally-friendly and, if included in state Renewable Portfolio Standards, will reduce the growth of renewables like wind and solar power. Historically, the U.S. Army Corps of Engineers and the Bureau of Reclamation built the vast majority of major federal dams with integrated hydroelectric… [more]

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Changing Times for Electric Utilities

Author(s): John Finnigan
Senior Regulatory Attorney
Environmental Defense Fund
Date: March 24, 2014 at 7:00 AM

Two seemingly unrelated announcements drew much attention in the electric utility industry recently. First, the Edison Electric Institute and the Natural Resources Defense Council jointly recommended changing how utilities should be regulated. Second, Duke Energy announced it will sell 13 Midwest merchant power plants. These announcements are actually related, and arise because the traditional utility business model is crumbling, due to several factors: Load growth has declined, due to a slowing economy and greater use of renewable energy and energy efficiency. Utilities are no longer able to obtain economies of scale by building ever-larger plants. New regulations have resulted in… [more]

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Metrics for Comparing Alternative Liquid Fuels

Author(s): Dr. Bruce Dale
University Distinguished Professor
Michigan State University, Dept. of Chemical Engineering
Date: February 20, 2014 at 7:04 AM

It is clear that the Age of Oil is winding down. Worldwide, the rate of discovery of new oil reserves peaked in the 1960s and in the US our peak rate of oil discovery occurred in the early 1930s. In recent years the world has used about three barrels of oil for every barrel of new oil reserves discovered. Thus we are living largely on past oil discoveries. There is still a lot of oil in the world, and we will still be using a lot of oil decades from now. But it will be increasingly expensive both economically and… [more]

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“60 Minutes” Calls Cleantech a Bust

Author(s): OurEnergyPolicy.org
Administrator
OurEnergyPolicy.org
Date: January 8, 2014 at 2:30 PM

A recent “60 Minutes” segment essentially called the cleantech industry a failure, eliciting a flurry of criticisms defending the green technology sector. “Hoping to create innovation and jobs, [President Obama] committed north of $100 billion in loans, grants and tax breaks to cleantech. But instead of breakthroughs, the sector suffered a string of expensive tax-funded flops. Suddenly cleantech was a dirty word,” said “60 Minutes’” host, Lesley Stahl. One of the main criticisms against the CBS segment was that it conflated the cleantech venture capital sector of Silicon Valley with the Department of Energy’s loan guarantee program. The critics have… [more]

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Are Microgrids the Answer to the Increasing Complexity of Electricity Markets?

Author(s): J. David Erickson
Public Utilities Regulatory Analyst
California Public Utilities Commission
Date: August 23, 2013 at 9:48 AM

The state of California is faced with the challenge of reaching its carbon emissions reduction and renewable portfolio standard goals while maintaining the safety and reliability of the electric supply and protecting the economic interests of the ratepayers. In addition to AB 32, which calls for reducing greenhouse gas emissions to 1990 levels by 2020, the state also has a Renewable Portfolio Standard goal of 33% renewables by 2020. The California Public Utilities Commission (CPUC), the California Independent System Operator (CAISO) and many stakeholders have been working on policies, technologies and market mechanisms to reach these goals. Managing the effect… [more]

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Should the Federal Government Provide Energy Loan Programs?

Author(s): OurEnergyPolicy.org
Administrator
OurEnergyPolicy.org
Date: August 15, 2013 at 10:20 AM

At the recent National Clean Energy Summit in Nevada, Energy Secretary Ernest Moniz lauded federal loans for green energy projects. “We have done a lot to try to get renewables out there, in fact in [Nevada] six loan guarantees, four in geothermal, one in CSP, and one on the grid… all come together to see real progress on the ground,” said Secretary Moniz. The loan guarantee programs have garnered significant skepticism and criticism, with much of the criticism focused on the collapse of Solyndra. Some critics have argued against the government acting as venture capitalists and others suggest tax cuts… [more]

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