The Energy Return on Energy Invested (EROI or EROEI) is the amount of energy acquired from a particular energy source divided by the energy expended, or invested, in obtaining that energy. EROI is an essential and seemingly simple measure of the usable energy or “energy profit” from the exploitation of an energy source, but it is not so easy to determine all of the energy expenditures that should be included in the calculation. Because EROI values are generally low for renewable energy sources, differences in these estimates can lead to sharply divergent conclusions about the viability of these energy technologies. This book presents the first complete energy analysis of a large-scale, real-world deployment of photovoltaic (PV) collection systems representing 3.5 GW of installed, grid-connected solar plants in Spain. The analysis includes all of the factors that limit and adjust the real electricity output through one full-year cycle, and all of the fossil fuel inputs required to achieve these results. The authors’ comprehensive analysis of energy inputs, which assigns energy cost estimates to all financial expenditures, yields EROI values that are less than half of those claimed by other investigators and by the solar industry. Sensitivity analysis is used to test various assumptions in deriving these EROI estimates. The results imply that the EROI of current, large-scale PV systems may be too low to seamlessly support an energy and economic transition away from fossil fuels. Given the pervasiveness of fossil fuel subsidies in the modern economy, a key conclusion is that all components of the system that brings solar power to the consumer, from manufacturing to product maintenance and life cycle, must be improved in terms of energy efficiency. The materials science of solar conversion efficiency is only one such component. Sunny Spain represented an ideal case study as the country had the highest penetration of solar PV energy at 2.3 percent of total national demand as well as state-of-the-art expertise in solar power including grid management of intermittent, modern renewable systems. This book, written by a uniquely qualified author team consisting of the chief engineer for several major photovoltaic projects in Spain and the world’s leading expert on the concept and application of EROI, provides a comprehensive understanding of the net energy available to society from energy sources in general and from functioning PV installations under real-world conditions in particular. The authors provide critical insight into the capacity of renewable energy sources to fill the foreseeable gap between world energy demand and depletion rates for fossil fuels. · Presents the first comprehensive study of the EROI of large-scale solar PV systems in a developed country · Uses real-world operational data rather than laboratory approximations and extrapolations · Describes the dependence of one alternative energy source on the goods and services of a fossil-fueled economy · Has global implications for the potential of renewable energy sources to replace dwindling reserves of fossil fuels · Written with the first-hand knowledge of the chief, on-site engineer for many solar installations in Spain together with the leader in the development and application of the concept of EROI

In lively and engaging language, this book describes our dependence on freight transport and its vulnerability to diminishing supplies and high prices of oil. Ships, trucks, and trains are the backbone of civilization, hauling the goods that fulfill our every need and desire. Their powerful, highly-efficient diesel combustion engines are exquisitely fine-tuned to burn petroleum-based diesel fuel. These engines and the fuels that fire them have been among the most transformative yet disruptive technologies on the planet. Although this transportation revolution has allowed many of us to fill our homes with global goods even a past emperor would envy, our era of abundance, and the freight transport system in particular, is predicated on the affordability and high energy density of a single fuel, oil. This book explores alternatives to this finite resource including other liquid fuels, truck and locomotive batteries and utility-scale energy storage technology, and various forms of renewable electricity to support electrified transport. Transportation also must adapt to other challenges: Threats from climate change, financial busts, supply-chain failure, and transportation infrastructure decay. Robert Hirsch, who wrote the “Peaking of World Oil Production” report for the U.S. Department of Energy in 2005, said that planning for peak world production must start at least 10, if not 20 years ahead of time. What little planning exists focuses mainly on how to accommodate 30 percent more economic growth while averting climate change, ignoring the possibility that we are at, or near, the end of growth. Taken for granted, the modern transportation system will not endure forever. The time is now to take a realistic and critical look at the choices ahead, and how the future of transportation may unfold.

An exploration of how writers, artists, and filmmakers expose the costs and contest the assumptions of the Capitalocene era that guides readers through the rapidly developing field of Spanish environmental cultural studies. From the scars left by Franco's dams and mines to the toxic waste dumped in Equatorial Guinea, from the cruelty of the modern pork industry to the ravages of mass tourism in the Balearic Islands, this book delves into the power relations, material practices and social imaginaries underpinning the global economic system to uncover its unaffordable human and non-human costs. Guiding the reader through the rapidly emerging field of Spanish environmental cultural studies, with chapters on such topics as extractivism, animal studies, food studies, ecofeminism, decoloniality, critical race studies, tourism, and waste studies, an international team of US and European scholars show how Spanish writers, artists, and filmmakers have illuminated and contested the growth-oriented and neo-colonialist assumptions of the current Capitalocene era. Focussed on Spain, the volume also provides models for exploring the socioecological implications of cultural manifestations in other parts of the world.

A Comprehensive Guide to Solar Energy Systems: With Special Focus on Photovoltaic Systems, the most advanced and research focused text on all aspects of solar energy engineering, is a must have edition on the present state of solar technology, integration and worldwide distribution. In addition, the book provides a high-level assessment of the growth trends in photovoltaics and how investment, planning and economic infrastructure can support those innovations. Each chapter includes a research overview with a detailed analysis and new case studies that look at how recent research developments can be applied. Written by some of the most forward-thinking professionals, this book is an invaluable reference for engineers. - Contains analysis of the latest high-level research and explores real world application potential in relation to developments - Uses system international (SI) units and imperial units throughout to appeal to global engineers - Offers measurable data written by a world expert in the field on the latest developments in this fast moving and vital subject

Building on insights from ecological economics and philosophy of technology, this book offers a novel, interdisciplinary approach to understand the contradictory nature of Solar photovoltaic (PV) technology. Solar photovoltaic (PV) technology is rapidly emerging as a cost-effective option in the world economy. However, reports about miserable working conditions, environmentally deleterious mineral extraction and toxic waste dumps corrode the image of a problem-free future based on solar power. Against this backdrop, Andreas Roos explores whether ‘ecologically unequal exchange’ – an asymmetric transfer of labour time and natural resources – is a necessary condition for solar PV development. He demonstrates how the massive increase in solar PV installation over recent years would not have been possible without significant wage/price differences in the world economy - notably between Europe/North America and Asia- and concludes that solar PV development is currently contingent on environmental injustices in the world economy. As a solution, Roos argues that solar technology is best coupled with strategies for degrowth, which allow for a transition away from fossil fuels and towards a socially just and ecologically sustainable future. This book will be of great interest to students and scholars of solar power, philosophy of technology, and environmental justice.

An innovative analysis that shows how the shift to solar energy—in particular, the use of photovoltaic cells—is both economically advantageous and inevitable, and will rival the information and communication technologies revolution in its transformative effects. In Solar Revolution, fund manager and former corporate buyout specialist Travis Bradford argues—on the basis of standard business and economic forecasting models—that over the next two decades solar energy will increasingly become the best and cheapest choice for most electricity and energy applications. Solar Revolution outlines the path by which the transition to solar technology and sustainable energy practices will occur. Developments in the photovoltaic (PV) industry over the last ten years have made direct electricity generation from PV cells a cost-effective and feasible energy solution, despite the common view that PV technology appeals only to a premium niche market. Bradford shows that PV electricity today has become the choice of hundreds of thousands of mainstream homeowners and businesses in many markets worldwide, including Japan, Germany, and the American Southwest. Solar energy will eventually be the cheapest source of energy in nearly all markets and locations because PV can bypass the aging and fragile electricity grid and deliver its power directly to the end user, fundamentally changing the underlying economics of energy. As the scale of PV production increases and costs continue to decline at historic rates, demand for PV electricity will outpace supply of systems for years to come. Ultimately, the shift from fossil fuels to solar energy will take place not because solar energy is better for the environment or energy security, or because of future government subsidies or as yet undeveloped technology. The solar revolution is already occurring through decisions made by self-interested energy users. The shift to solar energy is inevitable and will be as transformative as the last century's revolutions in information and communication technologies.

This book presents smart energy management in the context of energy transition. It presents the motivation, impacts and challenges related to this hot topic. Then, it focuses on the use of techniques and tools based on artificial intelligence (AI) to solve the challenges related to this problem. A global diagram presenting the general principle of these techniques is presented. Then, these techniques are compared according to a set of criteria in order to show their advantages and disadvantages with respect to the conditions and constraints of intelligent energy management applications in the context of energy transition. Several examples are used throughout the white paper to illustrate the concepts and methods presented. An intelligent electrical network (smart grid—SG) includes heterogeneous and distributed electricity production, transmission, distribution and consumption components. It is the next generation of electricity network able to manage electricity demand (consumption/production/distribution) in a sustainable, reliable and economical way taking into account the penetration of renewable energies (solar, wind, etc.). Therefore, a (SG) smart grid also includes an intelligent layer that analyzes the data provided by consumers as well as that collected from the production side in order to optimize consumption and production according to weather conditions, the profile and habits of the consumer. In addition, this system can improve the use of green energy through renewable energy penetration and demand response.

Wind energy is often portrayed as a panacea for the environmental and political ills brought on by an overreliance on fossil fuels, but this characterization may ignore the impact wind farms have on the regions that host them. Power Struggles investigates the uneven allocation of risks and benefits in the relationship between the regions that produce this energy and those that consume it. Jaume Franquesa considers Spain, a country where wind now constitutes the main source of energy production. In particular, he looks at the Southern Catalonia region, which has traditionally been a source of energy production through nuclear reactors, dams, oil refineries, and gas and electrical lines. Despite providing energy that runs the country, the region is still forced to the political and economic periphery as the power they produce is controlled by centralized, international Spanish corporations. Local resistance to wind farm installation in Southern Catalonia relies on the notion of dignity: the ability to live within one's means and according to one's own decisions. Power Struggles shows how, without careful attention, renewable energy production can reinforce patterns of exploitation even as it promises a fair and hopeful future.

Energy in Agroecosystems: A Tool for Assessing Sustainability is the first book on energy analysis that is up-to-date and specifically dedicated to agriculture. It is written from an agroecological perspective and goes beyond the conventional analysis of the efficient use of energy. The book provide a methodological guide to assess energy efficiency and sustainability from an eco-energetic point of view. Case studies from both Europe and America, which are representative of today’s most used scales of analysis (crop, farm, local or national) and the different farm management practices (traditional, industrialized, and contemporary organic), apply this methodology This book will be of primary interest to researchers, practitioners, and students working in the areas of agroecology, sustainable agriculture, environmental science, energy analysis, natural resources management, rural development and international development.

Going from the inner city to the open desert, a seasoned environmental advocate looks at solar energy’s remarkable ascent and its promise for America’s future Solar power was once the domain of futurists and environmentally minded suburbanites. Today it is part of mainstream America. Scan the skyline of downtown neighborhoods, check out the rooftop of the nearest Walmart, and take a close look at your local sports arena. Chances are you’ll find solar panels in those and many other unexpected places. In Harness the Sun, Philip Warburg takes readers on a far-flung journey that explores America’s solar revolution. Beginning with his solar-powered home in New England, he introduces readers to the pioneers who are spearheading our move toward a clean energy economy. We meet the CEOs who are propelling solar power to prominence and the intrepid construction workers who scale our rooftops installing panels. We encounter the engineers who are building giant utility-scale projects in prime solar states like Nevada, Arizona, and California, and the biologists who make sure wildlife is protected at those sites. Warburg shows how solar energy has won surprising support across the political spectrum. Prominent conservatives embrace solar power as an emblem of market freedom, while environmental advocates see it as a way to reduce America’s greenhouse gas emissions. At the same time, economic-justice activists celebrate solar’s potential to lift up low-income communities, and Native American leaders welcome the income and jobs that the industry will bring to their communities. Yet solar energy has its downsides and detractors too. Conservationists worry about the impact of large solar farms on protected animal species, and some local citizens groups resent the encroachment of solar projects on farmland and open spaces. Warburg gives voice to those at the epicenter of these conflicts and points the way to constructive solutions. Harness the Sun offers a grounded, persuasive vision of America’s energy future. It is a future fueled by clean, renewable sources of power, with solar at center stage.