Download or read book Hydrokinetic Turbine Systems for Remote River Applications in Cold Climates written by John Woods and published by . This book was released on 2017 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: In-situ testing of hydrokinetic river turbines demonstrates the feasibility of installing these turbines in cold climates and at remote communities without significant infrastructure requirements. Complete water-to-wire systems are deployed, tested in winter conditions and retrieved with major aspects of the technology investigated. A robust river-bottom anchoring system is developed and tested suitable for remote communities with minimal infrastructure. Vertical-axis 5-kW and 25-kW hydrokinetic turbines are deployed and tested in the Winnipeg River, under various climatic and flow conditions: -36oC to 30oC and 2.0 m/s to 2.6 m/s. Winter testing reveals that frazil ice accumulates on devices near the water surface, ice forms at the air-water interface, and ice sheets flowing with the stream can impact near-surface components. These factors lead to the conclusion that for low-maintenance and reliable year-round deployment in cold climates, systems must be fully submerged and removed if major ice floes occur. Hydrokinetic turbine generated power is delivered to a utility 12.47-kV overhead distribution line through pole-top transformers and bi-directional electricity meters, establishing a remote community water-to-wire system for the first time. Commercially available rectifier/inverters, developed for use in wind and solar energy capture, are successfully integrated into the power conversion system for the 5-kW and 25-kW units, reducing costs. A power conversion design is developed and tested. Concurrent measurement of river flow and turbulence with electrical power output from the permanent magnet generator are obtained in-situ. This data is used to investigate power production fluctuations resulting from turbulence in the flow. Turbulence is evaluated in detail, using time domain and frequency domain analysis. Calculated turbulence length scales varied from 0.7 m to 1.2 m, which are in the order of magnitude for the physical rotor elements. The results show that power extraction is maintained in the presence of moderate to high levels of turbulence in the range of 4% to 5% and that such level can improve energy capture. These studies indicate that hydrokinetic turbine systems can provide reliable power for both micro-grids and base-load applications in remote communities located in cold climates if placed below the water surface and not impacted by river ice floes.
Download or read book Designing Optimizing and Testing of a River Hydrokinetic Prototype Turbine System for Remote Northern Communities written by Raul Vaid and published by . This book was released on 2020 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: A hydrokinetic turbine extracts energy from river currents and can enable communities worldwide to establish micro-grids to address part of their base loads. Hydrokinetic turbines offer a viable solution to produce power year-round to displace diesel generation in northern communities. However, these turbines must operate in reduced winter flows and not be impacted by ice. A passive-counter-torque and river-prototype hydrokinetic turbine integrated system is presented that offers a simpler and lower-cost approach to deploy, operate and maintain hydrokinetic turbines year-round in cold climates. A 500-W river prototype designed with a 0.48 m diameter two-blade impeller is optimized, built and tested. It produces a torque of 24.44 Nm at 200 RPM for a flow velocity of 2.0 m/s. For this in-situ prototype, shrouds, winglets, and wingtips are developed and optimized to reduce the levelized cost of electricity and micro-grid performance when flow velocities are lower than the design set point of 2.0 m/s. Such off-design conditions are mainly experienced during winter seasons. Numerical simulations confirm that the winglet design maintains the design power when experiencing up to 18% reduction in velocity. Various design combinations were tested by varying component dimensions: 2,216 combinations for shrouds and 4,103 for winglets. The optimal results were achieved using the shrouds, while the winglets were found to have the advantage to prevent stalling. Testing of the prototype turbine at the Canadian Hydrokinetic Turbine Testing Centre shows that the counter-torque design selected was stable. However, using a field vacuum pump to control the ballast in the configuration tested needs to be reconsidered.
Download or read book Design Manufacture and Prototyping of a Hydrokinetic Turbine Unit for River Application written by Nick Oblas and published by . This book was released on 2016 with total page 63 pages. Available in PDF, EPUB and Kindle. Book excerpt: Energy production systems that produce less than 100kW are considered micro-hydrokinetic systems. This level of production is ideal for isolated supplementary, emergency, and off-grid power generation. The design focus was to create a micro-hydrokinetic turbine system to generate 250W of continuous power that could be transported by a small team.
Download or read book Transient Analysis of Micro hydrokinetic Turbines for River Applications written by and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Design Modeling and Prototyping of a Hydrokinetic Turbine Unit for River Application written by and published by . This book was released on 2016 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt: Based on turbine-diffuser characterization, rapid-computational fluid dynamics simulations, and free surface, multiphase simulations, a prototype was designed and developed to produce 250 Watts of power. The final design utilized specific flow conditions corresponding to the greatest percentage of potential installation sites where the unit could be deployed. Numerical predictions were produced for the final hydrokinetic turbine system, with a peak power coefficient value of 0.51 at a tip speed ratio of 2.5.
Download or read book In situ Testing of a Darrieus Hydro Kinetic Turbine in Cold Climates written by Shamez Kassam and published by . This book was released on 2009 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Water Current Turbines written by Peter Garman and published by Intermediate Technology Publications. This book was released on 1986 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt: Developed from Intermediate Technology (now Practical Action) experience in Sudan, this handbook describes the development and testing of the water current turbine as a simple and inexpensive means of lifting water for irrigation purposes. With detailed technical information on the technology, this manual also includes an economic assessment of its cost-effectiveness compared with other pumping technologies. This book is designed for the use of engineers and development workers who may be interested in trying this technology
Download or read book Piezoelectric Energy Harvesting written by Alper Erturk and published by John Wiley & Sons. This book was released on 2011-04-04 with total page 377 pages. Available in PDF, EPUB and Kindle. Book excerpt: The transformation of vibrations into electric energy through the use of piezoelectric devices is an exciting and rapidly developing area of research with a widening range of applications constantly materialising. With Piezoelectric Energy Harvesting, world-leading researchers provide a timely and comprehensive coverage of the electromechanical modelling and applications of piezoelectric energy harvesters. They present principal modelling approaches, synthesizing fundamental material related to mechanical, aerospace, civil, electrical and materials engineering disciplines for vibration-based energy harvesting using piezoelectric transduction. Piezoelectric Energy Harvesting provides the first comprehensive treatment of distributed-parameter electromechanical modelling for piezoelectric energy harvesting with extensive case studies including experimental validations, and is the first book to address modelling of various forms of excitation in piezoelectric energy harvesting, ranging from airflow excitation to moving loads, thus ensuring its relevance to engineers in fields as disparate as aerospace engineering and civil engineering. Coverage includes: Analytical and approximate analytical distributed-parameter electromechanical models with illustrative theoretical case studies as well as extensive experimental validations Several problems of piezoelectric energy harvesting ranging from simple harmonic excitation to random vibrations Details of introducing and modelling piezoelectric coupling for various problems Modelling and exploiting nonlinear dynamics for performance enhancement, supported with experimental verifications Applications ranging from moving load excitation of slender bridges to airflow excitation of aeroelastic sections A review of standard nonlinear energy harvesting circuits with modelling aspects.
Download or read book Renewable Energy Sources and Climate Change Mitigation written by Ottmar Edenhofer and published by Cambridge University Press. This book was released on 2011-11-21 with total page 1088 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book An Evaluation of the U S Department of Energy s Marine and Hydrokinetic Resource Assessments written by National Research Council and published by National Academies Press. This book was released on 2013-04-23 with total page 169 pages. Available in PDF, EPUB and Kindle. Book excerpt: Increasing renewable energy development, both within the United States and abroad, has rekindled interest in the potential for marine and hydrokinetic (MHK) resources to contribute to electricity generation. These resources derive from ocean tides, waves, and currents; temperature gradients in the ocean; and free-flowing rivers and streams. One measure of the interest in the possible use of these resources for electricity generation is the increasing number of permits that have been filed with the Federal Energy Regulatory Commission (FERC). As of December 2012, FERC had issued 4 licenses and 84 preliminary permits, up from virtually zero a decade ago. However, most of these permits are for developments along the Mississippi River, and the actual benefit realized from all MHK resources is extremely small. The first U.S. commercial gridconnected project, a tidal project in Maine with a capacity of less than 1 megawatt (MW), is currently delivering a fraction of that power to the grid and is due to be fully installed in 2013. As part of its assessment of MHK resources, DOE asked the National Research Council (NRC) to provide detailed evaluations. In response, the NRC formed the Committee on Marine Hydrokinetic Energy Technology Assessment. As directed in its statement of task (SOT), the committee first developed an interim report, released in June 2011, which focused on the wave and tidal resource assessments (Appendix B). The current report contains the committee's evaluation of all five of the DOE resource categories as well as the committee's comments on the overall MHK resource assessment process. This summary focuses on the committee's overarching findings and conclusions regarding a conceptual framework for developing the resource assessments, the aggregation of results into a single number, and the consistency across and coordination between the individual resource assessments. Critiques of the individual resource assessment, further discussion of the practical MHK resource base, and overarching conclusions and recommendations are explained in An Evaluation of the U.S. Department of Energy's Marine and Hydrokinetic Resource Assessment.
Download or read book WORLD ENERGY OUTLOOK 2018 written by and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Power of Renewables written by Chinese Academy of Engineering and published by National Academies Press. This book was released on 2011-01-29 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt: The United States and China are the world's top two energy consumers and, as of 2010, the two largest economies. Consequently, they have a decisive role to play in the world's clean energy future. Both countries are also motivated by related goals, namely diversified energy portfolios, job creation, energy security, and pollution reduction, making renewable energy development an important strategy with wide-ranging implications. Given the size of their energy markets, any substantial progress the two countries make in advancing use of renewable energy will provide global benefits, in terms of enhanced technological understanding, reduced costs through expanded deployment, and reduced greenhouse gas (GHG) emissions relative to conventional generation from fossil fuels. Within this context, the U.S. National Academies, in collaboration with the Chinese Academy of Sciences (CAS) and Chinese Academy of Engineering (CAE), reviewed renewable energy development and deployment in the two countries, to highlight prospects for collaboration across the research to deployment chain and to suggest strategies which would promote more rapid and economical attainment of renewable energy goals. Main findings and concerning renewable resource assessments, technology development, environmental impacts, market infrastructure, among others, are presented. Specific recommendations have been limited to those judged to be most likely to accelerate the pace of deployment, increase cost-competitiveness, or shape the future market for renewable energy. The recommendations presented here are also pragmatic and achievable.
Download or read book Wind Vision written by U. S. Department U.S. Department of Energy and published by CreateSpace. This book was released on 2015-03-18 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a detailed roadmap of technical, economic, and institutional actions by the wind industry, the wind research community, and others to optimize wind's potential contribution to a cleaner, more reliable, low-carbon, domestic energy generation portfolio, utilizing U.S. manu-facturing and a U.S. workforce. The roadmap is intended to be the beginning of an evolving, collaborative, and necessarily dynamic process. It thus suggests an approach of continual updates at least every two years, informed by its analysis activities. Roadmap actions are identified in nine topical areas, introduced below.
Download or read book Water Quality Monitoring written by Jamie Bartram and published by CRC Press. This book was released on 2020-10-14 with total page 396 pages. Available in PDF, EPUB and Kindle. Book excerpt: Water quality monitoring is an essential tool in the management of water resources and this book comprehensively covers the entire monitoring operation. This important text is the outcome of a collborative programme of activity between UNEP and WHO with inputs from WMO and UNESCO and draws on the international standards of the International Organization of Standardization.
Download or read book The Science of Hydro and Wave Energy written by James Bow and published by Science of Renewable Energy. This book was released on 2018 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt: Found in rushing rivers and the churning waters of the ocean, hydro and wave energy technologies turn the movement of water into useful electricity. The Science of Hydro and Wave Energy examines the fields of hydroelectric and ocean energy technologies, including the underlying scientific concepts, their potential for replacing fossil fuels, examples of how they are used today, and prospective future developments.
Download or read book Integration of Distributed Generation in the Power System written by Math H. J. Bollen and published by John Wiley & Sons. This book was released on 2011-08-04 with total page 526 pages. Available in PDF, EPUB and Kindle. Book excerpt: The integration of new sources of energy like wind power, solar-power, small-scale generation, or combined heat and power in the power grid is something that impacts a lot of stakeholders: network companies (both distribution and transmission), the owners and operators of the DG units, other end-users of the power grid (including normal consumers like you and me) and not in the least policy makers and regulators. There is a lot of misunderstanding about the impact of DG on the power grid, with one side (including mainly some but certainly not all, network companies) claiming that the lights will go out soon, whereas the other side (including some DG operators and large parks of the general public) claiming that there is nothing to worry about and that it's all a conspiracy of the large production companies that want to protect their own interests and keep the electricity price high. The authors are of the strong opinion that this is NOT the way one should approach such an important subject as the integration of new, more environmentally friendly, sources of energy in the power grid. With this book the authors aim to bring some clarity to the debate allowing all stakeholders together to move to a solution. This book will introduce systematic and transparent methods for quantifying the impact of DG on the power grid.
Download or read book Electricity from Renewable Resources written by National Research Council and published by National Academies Press. This book was released on 2010-04-05 with total page 386 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
