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An earth energy system (EES) is a type of heat pump system that uses the ground or groundwater as a source of energy. This guide provides information needed to understand, plan, oversee, design, build, and manage an EES for heating & cooling applications in commercial & institutional buildings. Chapter 1 provides an introduction to EESs, what they are, where they make the most sense, how they work, and their economics as compared to other heating, ventilating, & air conditioning systems. Chapter 2 describes the different configurations or types of EESs and factors to be considered when selecting an EES. It also introduces the energy efficiency descriptors for heat pumps used in EESs and discusses the importance of energy efficiency in other aspects of buildings. Chapter 3 provides a brief overview of an EES design. Chapter 4 examines other important matters unique to EESs, such as environmental & legal considerations and planning, installation, & maintenance issues. Chapter 5 contains a detailed examination of topics pertaining to heat pump performance & efficiency. Chapter 6 discusses the evaluation & calculation of building loads & energy use. Chapter 7 explains the requirements for sizing heat pumps and ground heat exchangers, and includes sample calculations. Chapter 8 outlines factors to consider in the analysis of an EES investment and includes an economic & financial calculation example. The final chapter addresses practical issues that should be considered in EES design & installation. It also provides a sample performance specification and a list of important information to obtain from suppliers & contractors. Appendices include EES case studies and a glossary.
"Covers residential geothermal heating and cooling, including various system options and installation configurations, costs and payback issues, performance standards, and contractors. Also examines how energy-efficient, non-polluting geothermal heat pumps work and how to integrate solar energy"--
This comprehensive compilation of DOE documents provides unique and practical information about geothermal heat pumps, including small geothermal systems and DIY systems. Contents: Chapter 1: Small Geothermal Systems: A Guide For The Do-It-Yourselfer * Chapter 2: Using The Earth To Heat and Cool Buildings * Chapter 3: An Information Survival Kit For The Prospective Geothermal Heat Pump Owner * Chapter 4: Success Stories of the Geothermal Energy Program * Chapter 5: Ground-Source Heat Pumps: Overview of Market Status, Barriers to Adoption, and Options for Overcoming Barriers A heat pump-like an air conditioner or refrigerator-moves heat from one place to another. In the summer, a geothermal heat pump (GHP) operating in a cooling mode lowers indoor temperatures by transferring heat from inside a building to the ground outside or below it. Unlike an air conditioner, though, a heat pump's process can be reversed. In the winter, a GHP extracts heat from the ground and transfers it inside. Also, the GHP can use waste heat from summer air-conditioning to provide virtually free hot-water heating. The energy value of the heat moved is typically more than three times the electricity used in the transfer process. GHPs are efficient and require no backup heat because the earth stays at a relatively moderate temperature throughout the year. A GHP system has three major components: a ground loop (buried piping system), the heat pump itself (inside the house), and a heating and cooling distribution system. There are two main types of GHP systems. The earth-coupled (or closed-loop) GHP uses sealed horizontal or vertical pipes as heat exchangers through which water, or water and antifreeze, transfer heat to or from the ground. The second type, the water-source (or open-loop) GHP, pumps water from a well or other source to the heat exchanger, then back to the source. Because of their versatility, earth-coupled systems dominate the GHP market. Typical loop installations for the earth-coupled systems are expected to work for 50 years. More than 400,000 GHPs are operating in homes, schools, and commercial buildings in the United States. They are adaptable to virtually any kind of building; the Federal government has installed nearly 10,000 GHPs. Geothermal resources are available across the United States at varying depths, providing a ubiquitous buried treasure of domestic renewable energy. Enormous amounts of hydrothermal geothermal energy is available in the western United States, but theoretically, geothermal sources are available across the United States. The key to being able to use geothermal energy is to find a way to enhance geothermal systems lacking key natural characteristics. Natural geothermal systems depend on three factors to produce energy: heat, water, and permeability. While heat is present virtually everywhere at depth, water and permeability are less abundant. Geothermal technology is an attractive renewable resource because it can provide a constant source of renewable baseload electricity. While the sun and wind offer a large potential source of renewable energy that varies over time, geothermal technology is uninterruptible and can provide a stable baseload form of energy while diversifying the nation's renewable portfolio. Geothermal energy has low environmental risk and impact. When used with a closed-loop binary power plant, geothermal systems emit zero greenhouse gas emissions and have a near zero environmental risk or impact.
ENERGY SYSTEMS Reimagine the future of energy production and use with this innovative and state-of-the-art guide This multidisciplinary and comprehensive text features an up-to-date summary of salient energy technologies for quick reference by students and practitioners of energy engineering. Uniquely, the book employs a guided self-study approach with theory provided in “bite-sized” chunks, several worked examples, quantitative and qualitative practice problems, 10 real-world mini-projects, and interviews with young energy innovators and engineering students. The book poses many big and pressing questions, asking the reader to “reimagine our future,” particularly with a focus on sustainable energy. These questions are aligned with characteristics of an entrepreneurial mindset, which are emphasized throughout the book. The book reviews the fundamentals of thermodynamics, fluid mechanics, and quantum mechanics. Chapters explore the full range of energy conversion technologies, including energy supply and demand, the science of global warming, interpretations of sustainability, chemical fuels, carbon capture and storage, internal and external combustion engines, vapor power and refrigeration plants, nuclear power, solar-electricity, solar-heat, fuel cells, wind energy, water energy, and energy storage. The book ends with a brief investigation into what we can do to decarbonize the transportation, industry, buildings, and electric power sectors. Energy Systems: A Project-Based Approach to Sustainability Thinking for Energy Conversion Systems offers an accessible overview of this important subject with an innovative, easy-to-use organization. Built to facilitate active learning and representing the latest research and industrial practice, Energy Systems provides readers with tools and information to evaluate energy systems and to reimagine potential energy solutions. Readers of Energy Systems will also find: Organization designed to blend seamlessly with a 14-week course schedule A balance of robust theoretical and industry-related knowledge and real-world examples throughout Teaching resources including mini-projects, practice problems, remedial appendices, and online study notes Energy Systems is ideal for students and instructors in courses relating to Energy Conversion Systems, Energy Science, Sustainable/Renewable Energy, and the interrelated Social, Technological, Economic, Environmental, and Political aspects. The book will also appeal to practitioners of energy engineering via the numerous state-of-the-art summaries and real-world problems.
The primary human activities that release carbon dioxide (CO2) into the atmosphere are the combustion of fossil fuels (coal, natural gas, and oil) to generate electricity, the provision of energy for transportation, and as a consequence of some industrial processes. Although aviation CO2 emissions only make up approximately 2.0 to 2.5 percent of total global annual CO2 emissions, research to reduce CO2 emissions is urgent because (1) such reductions may be legislated even as commercial air travel grows, (2) because it takes new technology a long time to propagate into and through the aviation fleet, and (3) because of the ongoing impact of global CO2 emissions. Commercial Aircraft Propulsion and Energy Systems Research develops a national research agenda for reducing CO2 emissions from commercial aviation. This report focuses on propulsion and energy technologies for reducing carbon emissions from large, commercial aircraftâ€" single-aisle and twin-aisle aircraft that carry 100 or more passengersâ€"because such aircraft account for more than 90 percent of global emissions from commercial aircraft. Moreover, while smaller aircraft also emit CO2, they make only a minor contribution to global emissions, and many technologies that reduce CO2 emissions for large aircraft also apply to smaller aircraft. As commercial aviation continues to grow in terms of revenue-passenger miles and cargo ton miles, CO2 emissions are expected to increase. To reduce the contribution of aviation to climate change, it is essential to improve the effectiveness of ongoing efforts to reduce emissions and initiate research into new approaches.