Vindenergi

This book deals with horizontal-axis wind turbine aerodynamic performance prediction methods. It focuses on the traditional and newly-developed methods for the wind turbine aerodynamic performance calculation. The fundamental theories of fluid mechanics essential for understanding the other parts of this book are firstly introduced in Part I, followed by the blade element momentum theory in Part II, with special attentions to a systematic review of various correction models. Part III is mainly about the prescribed and free vortex wake methods, while the state-of-art computational fluid dynamics (CFD) methods are detailed in Part IV.Part III thoroughly describes the prescribed and free vortex wake methods which are still of great importance towards realistic investigation of wind turbine performance. Despite the highly computational cost, the CFD methods in Part IV have received increasing interest from the academic community since they provide more detailed information about the flow field around the wind turbine. This has shed a light in combination with the correction models introduced in Part II on more advanced research for wind turbine.This book is intended for researchers and students interested in aerodynamics of wind turbine and is particularly suitable for practicing engineers in wind energy. Readers can gain a comprehensive understanding in both classical and up-to-date methods for the study of wind turbine aerodynamics. The authors hope that this book can promote the research and development of wind turbines.

Vi ved det godt: Klimakrisen er tidens største politiske, sociale og økonomiske problem. Vores afhængighed af fossile brændsler risikerer reelt at blive menneskehedens endeligt. Vi skylder fremtidige generationer at sætte alt ind for at reducere udledningen af drivhusgasser. Lige nu. Men glem alt dette et øjeblik. Det grønne pengetræ er hverken en appel til din dårlige samvittighed eller dit varme hjerte. Bogens altoverskyggende argument er kynisk: Vi skal sætte tryk på den grønne omstilling, fordi der er gode penge at tjene på den. Vi skal erstatte det fossile med grønt, fordi det er en guldrandet forretning for danske virksomheder, almindelige lønmodtagere og din privatøkonomi.Igennem interviews med alt fra topchefer til havnearbejdere og atomfysikere, understreger Magnus Barsøe det imponerende potentiale inden for de grønne investeringer. Han kommer med politiske forslag, der kan sætte skub i den grønne omstilling og leverer en bredside til venstrefløjens vækstkritikere. Og han tager fat på et af de mest kontroversielle emner i klimadebatten: atomkraft.

This compact text is a powerful introduction to the Excel/VBA computing environment. The book presents some of the most useful features of Excel. First by introducing mathematical puzzles that will grab the reader's attention with the reader invited to think hard on solving those puzzles. Then, solutions are presented in a logical manner. The book goes on to describe modern and up-to-date engineering problems and their solutions. Based on many years of the authors' teaching, the book provides a practical, useful and enjoyable learning methods for readers to become expert in Excel and its application to engineering.

The 2022 Congress on Research, Development, and Innovation in Renewable Energies (CIDiER 2022) promotes international collaboration on ideas and dialogue around climate change solutions through research and development that leads to clean energy innovation via renewable energies. The selected papers cover both theoretical and applied research that will strengthen the implementation of renewable energy projects between universities, research centers, and private companies in Latin America.

With the growth of the installed capacity and the proportion of REG, mainly including wind power and PV power generation, the stable operation of REG and AC/DC transmission systems has become a technical bottleneck for the sustainable development of REG. Since 2009, broadband oscillation incidents have occurred frequently in REG and AC/DC transmission systems in China and some foreign countries, resulting in severe consequences such as large-scale tripping-off of REG units, damaging equipments, and an increasing curtailment of wind and PV power generation. However, there are great difficulties and challenges for the analysis and mitigation of broadband oscillation.This book focuses on the analysis and mitigation of broadband oscillation in renewable energy generation and AC/DC transmission systems. The theoretical knowledge and practical approaches to solve this issue are explored through the contents of 4 parts, 18 chapters. Part ¿ is Small-signal Modeling of Converters, containing four chapters. The frequency-domain small-signal modeling method and impedance modeling of three types of basic converters commonly used in power electronic devices, including the two-level converter, modular multilevel converter, and thyristor converter are introduced. Part ¿ is Impedance Model and Characteristics Analysis of REG and HVDC Transmission, containing six chapters. The impedance model and characteristics analysis of the full power conversion wind turbine, DFIG-based wind turbines, PV unit, SVG, LCC-HVDC, and MMC-HVDC are introduced. Part ¿ is Broadband Oscillation Analysis in REG and AC/DC Transmission Systems, containing three chapters. The impedance modeling and characteristics analysis of REG plants, and oscillation analysis of REG connected into AC and HVDC transmission systems are introduced. Part ¿ is Broadband Oscillation Mitigation in REG and AC/DC Transmission Systems, containing five chapters. The impedance reshaping of the REG unit, SVG, LCC-HVDC, and MMC-HVDC as well as project cases are presented.This book can be used by the researchers engaged in the design, technology research and development, and operation management of electrical engineering and renewable energy engineering, which can also be a reference book for teachers and students of electrical engineering in colleges and universities.

Overskrifterne fortæller os, at kloden er ved at koge over, og at det haster med at stoppe udslippet af CO2 i atmosfæren. Heldigvis findes der en lang række af tekniske løsninger, som kommer til at gøre en forskel. I denne bog kan du læse om nogle af disse grønne teknologier: energi fra sol, vind og vand, nye former for atomkraft, brint som drivmiddel og energilager, huse på vandet, CO2-venligt byggeri, Power-to-X og meget mere. Så bevar optimismen. Med klog og smart teknologi kan vi sammen fikse klimakrisen.Fra 10 år.

This book focuses on the current situation of two technologies for electricity production from renewable energy sources, wind and solar photovoltaic energy, analysing and describing both technologies in detail.Four regions of the world, with distinct energy markets and conditions, are explored. Together, the USA, Europe, China and Japan represent one third of the world¿s population and occupy 25% of the planet, therefore offering a representation of a global picture. In each of these regions, the development of the solar and wind energy is examined, and the economic implications are described.

This book consists of selected papers from the 2022 4th International Conference on Environment Sciences and Renewable Energy, which was held as a fully virtual conference during May 27¿29, 2022. The book overviews the latest progress in environmental and energy technologies with a specific focus on wind turbines and hydrogen production. In the field of environmental science, wastewater treatment, air pollution abatement, solid waste treatment, and general policy recommendations are discussed. Technology advances, especially in wastewater nutrients and micropollutant removal, are covered. In policy measures, cost allocations, optimum recycling strategies, and environmental footprint allocations of different environmental technologies are included. In the field of renewable energy, several hot topics, including solar cells, offshore floating wind turbines, and renewable energy resource potentials in different regions are considered.

With the rapid growth of wind energy worldwide, challenges in the operation and control of wind turbine systems are becoming increasingly important. This book conveys up to date theoretical and practical techniques applicable to the control of wind turbine systems.

A sustainable community energy system is an approach to supplying a local community - ranging from a few homes or farms to entire cities - with its energy requirements from renewable energy or high-efficiency co-generation energy sources. Such systems are frequently based on wind power, solar power, biomass, either singly or in combination. Community energy projects have been growing in numbers in several key regions.This book provides an overview of existing and emerging community energy technologies. Topics covered include data-driven methods for prediction of small to medium wind turbines performance; optimisation of wind farms for communities; financing for community wind and photovoltaic project development; community-level solar thermal systems; solar water desalination for small communities; community solar photovoltaic projects; assessing wind loads for urban photovoltaic installations; design optimisation of multi-energy hubs for community energy projects; battery based storage for communities; power-to-gas and power-to-power for storage and ancillary services in urban areas; smart multi-energy microgrids; and conservation and demand management in community energy systems.Wind and Solar Based Energy Systems for Communities is essential reading for researchers and engineers working to develop community energy systems and advance the transition to a clean energy future.

The conference proceedings of the 4th Conference for Wind Power Drives (CWD) contains the collected contributions of the congress which took place on the 12th and 13th of March, 2019. The latest developments and innovations are presented in 37 articles covering the following topics: Gearbox - Torque Density, Gearbox - System Performance, Grid Conformity, Generator, Drive Train Concepts, Roller Bearings - Design and Testing, Roller Bearings - Loads, Wind 4.0 - Potential of Data Analytics, Wind 4.0 - Predictive Maintenance & Reliability, Plain Bearings and Condition Monitoring.The CWD has been held every two years since 2013 and acts as an interdisciplinary platform for knowledge and technology transfer between developers, researchers and operators. Furthermore, the conference promotes networking between industry and university in the field of wind turbinedrive trains. The conference is supported by Mechanical Engineering Industry Association (VDMA) the Research Association for Drive Technology (FVA) and the IEEE Power Electronics Society.

Die hohe Entwicklungsgeschwindigkeit im immer noch jungen Bereich Windenergie führt zu neuen Herausforderungen auf dem Gebiet der Antriebstechnik von Windenergieanlagen (WEA). Zur Gewährleistung und Erhöhung der Zuverlässigkeit von WEA, auch im Hinblick auf die geringe Langzeiterfahrung mit den aktuellen Leistungsklassen, ist es notwendig, Entwicklungen und Innovationen im Bereich von Regelungs-, Berechnungs- und Prüfverfahren voranzutreiben und neue Prüfmöglichkeiten zu erschließen. Im Rahmen der zweiten Conference for Wind Power Drives (CWD) am 3. und 4. März 2015 im Eurogress Aachen wird der neueste Stand der Forschung und Technik im Bereich der Triebstränge sowie Pitch- und Yawsysteme von Windenergieanlagen präsentiert. Die CWD versteht sich als interdisziplinäre Plattform zum Erfahrungs- und Ideenaustausch zwischen Entwicklern, Forschern und Anwendern und soll darüber hinaus die Kommunikation zwischen Industrie und Hochschule in der Windbranche fördern.The high speed of development within the still young sector wind energy leads to new challenges in the field of wind turbine (WT) drive trains. Regarding little long term experience with current WT power levels, developments in the range of control, design and test procedures must be furthered and new test facilities have to be made accessible to ensure and increase reliability of WT. To present the state of the art and innovations in the field of wind turbine generator drive trains and pitch-/ yaw-systems the second Conference for Wind Power Drives (CWD) will be taking place on 3rd and 4th of March 2015 in Eurogress Aachen. The CWD is designed as an interdisciplinary platform for knowledge and technology transfer between developers, research scientists and operators. Furthermore, the conference promotes exchange between industry and academia in the field of wind turbine drive trains.