47,617 research outputs found

    Carbon Capture; Transport and Storage in Europe: A Problematic Energy Bridge to Nowhere?

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    This paper is a follow up of the SECURE-project, financed by the European Commission to study “Security of Energy Considering its Uncertainties, Risks and Economic Implications”. It addresses the perspectives of, and the obstacles to a CCTS-roll out, as stipulated in some of the scenarios. Our main hypothesis is that given the substantial technical and institutional uncertainties, the lack of a clear political commitment, and the available alternatives of low-carbon technologies, CCTS is unlikely to play an important role in the future energy mix; it is even less likely to be an “energy bridge” into a low-carbon energy futureCarbon Capture, Transport, Storage

    Convex Relaxations for Gas Expansion Planning

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    Expansion of natural gas networks is a critical process involving substantial capital expenditures with complex decision-support requirements. Given the non-convex nature of gas transmission constraints, global optimality and infeasibility guarantees can only be offered by global optimisation approaches. Unfortunately, state-of-the-art global optimisation solvers are unable to scale up to real-world size instances. In this study, we present a convex mixed-integer second-order cone relaxation for the gas expansion planning problem under steady-state conditions. The underlying model offers tight lower bounds with high computational efficiency. In addition, the optimal solution of the relaxation can often be used to derive high-quality solutions to the original problem, leading to provably tight optimality gaps and, in some cases, global optimal soluutions. The convex relaxation is based on a few key ideas, including the introduction of flux direction variables, exact McCormick relaxations, on/off constraints, and integer cuts. Numerical experiments are conducted on the traditional Belgian gas network, as well as other real larger networks. The results demonstrate both the accuracy and computational speed of the relaxation and its ability to produce high-quality solutions

    Arctic Standards: Recommendations on Oil Spill Prevention, Response, and Safety in the U.S. Arctic Ocean

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    Oil spilled in Arctic waters would be particularly difficult to remove. Current technology has not been proved to effectively clean up oil when mixed with ice or when trapped under ice. An oil spill would have a profoundly adverse impact on the rich and complex ecosystem found nowhere else in the United States. The Arctic Ocean is home to bowhead, beluga, and gray whales; walruses; polar bears; and other magnificent marine mammals, as well as millions of migratory birds. A healthy ocean is important for these species and integral to the continuation of hunting and fishing traditions practiced by Alaska Native communities for thousands of years.To aid the United States in its efforts to modernize Arctic technology and equipment standards, this report examines the fierce Arctic conditions in which offshore oil and gas operations could take place and then offers a summary of key recommendations for the Interior Department to consider as it develops world-class, Arctic-specific regulatory standards for these activities. Pew's recommendations call for improved technology,equipment, and procedural requirements that match the challenging conditions in the Arctic and for full public participation and transparency throughout the decision-making process. Pew is not opposed to offshore drilling, but a balance must be achieved between responsible energy development and protection of the environment.It is essential that appropriate standards be in place for safety and for oil spill prevention and response in this extreme, remote, and vulnerable ecosystem. This report recommends updating regulations to include Arctic specific requirements and codifying temporary guidance into regulation. The appendixes to this report provide substantially more detail on the report's recommendations, including technical background documentation and additional referenced materials. Please refer to the full set of appendixes for a complete set of recommendations. This report and its appendixes offer guidelines for responsible hydrocarbon development in the U.S. Arctic Ocean

    European Energy Security: What Should It Mean? What to Do? ESF Working Paper, No. 23, 30 October 2006

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    [From the Introduction]. ‱ Is energy a strategic good? If it is, to what extent does it make sense to deny the extraction of political leverage from energy policy? In criticising Russian energy policy, are we not protesting too much against the fact that Russia (as others) is using energy for political ends – instead of criticising, as we should, the content of Russia’s policy? And if energy is strategic, should a European Union energy policy be primarily about the liberalisation of the energy market? ‱ Is claiming reciprocity always smart? After all, do we really want Russian firms to control both the downstream as well as the upstream elements of the EU’s energy supply chain, in exchange for access by EU firms to Russian energy production and transport? ‱ Should it really be EU policy to help Turkey to make full use of its potential as a major energy hub? After all, half of Russia’s oil exports already pass through the Bosporus, creating a major risk if that very vulnerable route were to be cut

    Factors Affecting Water Management on the North Slope of Alaska

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    The North Slope of Alaska is undergoing sudden development following the recent discovery of large oil and gas reserves in the area. The water resources of the region should be carefully managed both to ensure adequate supplies of usable water at reasonable cost, and to guard against excessive deterioration of water quality. The likely effects on the environment of man's activities are investigated and found to be poorly understood at the present time. Research priorities are suggested to supply rapid answers to questions of immediate importance. The applicability of a regional management concept to the North Slope waters is considered and the concept is recommended as part of a broad land and water planning philosophy which would emphasize regional control over state and federal control. The use of economic incentives rather than standards for the control of water quality is not recommended at the present time.The work upon which this report is based was supported primarily by funds provided by the Sea Grant Program of the University of Alaska under grant No. 1-36109

    China and East Asian Energy : Prospects and Issues

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    In October 2005, the Crawford School (then the Asia Pacific School of Economics and Government) within the Australian National University (ANU) initiated a major research project on China and East Asian Energy. The project is being undertaken under the schools East Asia Forum in conjunction with the China Economy and Business Program. The first conference in the series being organised under the auspices of the China and East Asian Energy Strategies Research Program was hosted in Beijing by the Energy Research Institute and the ANU on 1011 October 2005. It was the first of five annual conferences in the program. This book brings together the key papers presented at that conference.
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