Bøger i Synthesis Lectures on Renewable Energy Technologies serien

Designing a wind turbine is an interdisciplinary process that requires an understanding of challenges for all parties involved. The authors deliver an effective and economic way to organize such a design by respecting all the challenges involved. The book provides such insight by utilizing specific examples of existing modern designs. Detailed descriptions and explanations are given for those components of the wind turbine that are normally developed by the so-called original equipment manufacturers (OEM) of a particular type. The OEM needs to have full knowledge of the complete system that consists of all parts being rotor blades, nacelle, drive train, tower, and foundation including the dynamic properties and the response to the controller action. This full knowledge is called system competence. For a wind turbine the drive train is the most important system. It consists of many components like shafts, bearings, gearbox, and generator for a wind turbine with a gear box; in systems without a gearbox a large generator has to be integrated into the drive train.

This volume considers various methods of energy storage that make use of electrochemical reactions, electric and magnetic fields, and chemical reactions. This book begins with a consideration of the use of batteries as a means of storing electrical energy. Various common battery chemistries are presented along with a summary of common battery sizes. The electrochemistry of a lithium-ion (Li-ion) cell is discussed in detail. Sodium-based batteries are discussed, as are vanadium flow batteries. The applications of batteries for energy storage are overviewed, concentrating on transportation technologies and grid-scale storage. Methods for storing energy in the form of electric fields include the use of supercapacitors and superconducting coils. The design of capacitors, including supercapacitors, pseudocapacitors, and hybrid capacitors is presented. The applications of supercapacitors for high-power, short-term energy storage are discussed. The use of superconducting magnets to store large amounts of electrical energy without resistive loss is presented. The application of superconducting electrical storage for grid stability is considered. Final chemical energy storage techniques are considered. The use of hydrogen as an energy carrier is discussed in detail. The concept of a future hydrogen economy has been popular in recent years. This volume considers the efficiency of such an approach. Other chemical energy carriers, such as methane, methanol, and ammonia, are discussed.