Understanding Energy

The first systematic, quantitative appraisal of power density, offering detailed reviews of power densities of renewable energy flows, fossil fuels, and all common energy uses. “There's no author whose books I look forward to more than Vaclav Smil.” —Bill Gates In this book, Vaclav Smil argues that power density is a key determinant of the nature and dynamics of energy systems. Any understanding of complex energy systems must rely on quantitative measures of many fundamental variables. Power density—the rate of energy flux per unit of area—is an important but largely overlooked measure. Smil provides the first systematic, quantitative appraisal of power density, offering detailed reviews of the power densities of renewable energy flows, fossil fuels, thermal electricity generation, and all common energy uses. Smil shows that careful quantification, critical appraisals, and revealing comparisons of power densities make possible a deeper understanding of the ways we harness, convert, and use energies. Conscientious assessment of power densities, he argues, proves particularly revealing when contrasting the fossil fuel–based energy system with renewable energy conversions. Smil explains that modern civilization has evolved as a direct expression of the high power densities of fossil fuel extraction. He argues that our inevitable (and desirable) move to new energy arrangements involving conversions of lower-density renewable energy sources will require our society—currently dominated by megacities and concentrated industrial production—to undergo a profound spatial restructuring of its energy system.

The transformation of the dominant model of centralized energy production from fossil fuels to renewable energies is at the center of the public and scientific debate, as well as the subject of national and European policies, as it is connected to highly topical issues such as climate change, emissions reduction and natural disasters, security of supply and sustainability of the current economic development model. Up to now this topic has been mainly addressed by the economic and engineering sciences, with a research focus on the hardware rather than on the human and social software. However, energy systems, and the possibilities of change, are not only economic or technological but involve also patterns of social life, representations, organizational models and relational structures. In order to generate the social preconditions for the transition to a low-emission society, focused on a growing production of energy from renewable sources and on a greater sustainability of consumption, it is therefore urgent to reaffirm the centrality of a sociological approach to energy. This book focused on three core research areas which are crucial to understand what is at stake with the energy transition: conflicts over the construction and location of renewable energy production plants; collective action on renewable sources that promote a new model of energy system in which consumers are also producers; and the social-territorial impact of energy policies.

The enlightening, best-selling book on understanding sustainable energy and how we can make energy plans that add up. If you've ever wondered how much energy we use, and where it comes from – and where it could come from – but are fed up with all the hot air and 'greenwash', this is the book for you. Renewable resources are 'huge', but our energy consumption is also 'huge'. To compare 'huge' things with each other, we need numbers, not adjectives. Sustainable Energy – without the hot air addresses the energy crisis objectively, cutting through all the contradictory statements from the media, government, and lobbies of all sides. It gives you the numbers and the facts you need, in bite-sized chunks, so you can understand the issues yourself and organises a plan for change on both a personal level and an international scale – for Europe, the United States, and the world. In case study format, this informative book also answers questions surrounding nuclear energy, the potential of sustainable fossil fuels, and the possibilities of sharing renewable power with foreign countries. Written by David MacKay, who was an esteemed Professor of Engineering at the University of Cambridge and Chief Scientific Advisor to the UK Department of Climate Change, this is an uplifting, jargon-free and informative read for all. In it, David debunks misinformation and clearly explains the calculations of expenditure per person to encourage people to make individual changes that will benefit the world at large. If you've thrown your hands up in despair thinking no solution is possible, then read this book - it's an honest, realistic, and humorous discussion of all our energy options.

By mid-century, renewable energy must cover all of our energy supply if we are to phase out nuclear and successfully stop climate change. Now updated and expanded, the 2nd edition of this textbook covers the full range of renewable energy systems and now also includes such current trends as solar power storage, power-to-gas technologies, and the technology paths needed for a successful and complete energy transition. The topics are treated in a holistic manner, bringing together maths, engineering, climate studies and economics, and enabling readers to gain a broad understanding of renewable energy technologies and their potential.Numerous examples are provided for calculations, and graphics help visualize the various technologies and mathematical methodologies. Understanding Renewable Energy Systems is an ideal companion for students of renewable energy at universities or technical colleges on courses such as renewable energy, electrical engineering, engineering technology, physics, process engineering, building engineering, environment, applied mechanics and mechanical engineering, as well as scientists and engineers in research and industry.

This book begins with primary concepts of atomic and molecular structure and of how atoms, molecules and bulk matter store and exchange energy. In the next stage, the macroscopic properties of energy and entropy, and of the constitutive properties of heat capacities are examined. From these, the concept of thermodynamic efficiency is developed. Then the notions of thermodynamic potentials and availability are introduced. With this set of concepts, the analysis of efficient energy use is presented.

In this engaging title, young readers learn about different forms of energy! Different forms of energy such a potential and kinetic are explained, as are gravity, acceleration, velocity, g-forces, and centripetal force. These properties are illustrated by the design and operation of roller coasters. Colorful infographics make joules and shifting energy easily accessible, and prominent contributors such as LaMarcus Thompson are featured. A fun experiment with potential and kinetic energy brings the science of energy to life! Aligned to Common Core Standards and correlated to state standards. Checkerboard Library is an imprint of Abdo Publishing, a division of ABDO.

This open access book uses smart grids to explore and better understand energy innovation, from a social science perspective. Understanding Energy Innovation has four core themes--networks, nodes, narratives and nostalgia--and each chapter tackles a theme, using case studies from Australia and Europe. Energy innovation is currently occurring at a rapid pace, in response to a host of problems including climate change, high energy prices, and unreliable supply. Understanding Energy Innovation provides ways to think about and plan for energy sector reform and innovation, drawing on core ideas from social and innovation theory, and centred on smart grids as a case study. These academic ideas are written about in an accessible way, recognising that a diversity of people have an interest in energy innovation generally, and smart grids more specifically, and would like to find out more about ways of understanding energy innovation that integrate the social and the political.

Activists, scientists and policymakers around the world have long argued that we need to find sustainable and secure solutions to the world's energy demands. At issue for citizens worldwide is whether we are scientifically literate enough to understand the potential policy choices before us. Understanding Energy and Energy Policy is a one-stop resource for understanding the complexities of energy policy and the science behind the utilization of energy sources. The multidisciplinary perspective presented in this book is necessary for readers to be able to weigh the advantages and disadvantages of potential energy policies. The book draws on case studies from the global North and South, from countries that are resource poor and resource rich, while providing explanations of the science and politics behind burning fossil fuels, and power created through nuclear energy, solar energy, geothermal energy, wind energy, biofuels and water.