Author:
Publisher: Environmental Protection Agency
ISBN:
Category : Science
Languages : en
Pages : 52
Book Description
"This guide can be downloaded from: www.eere.energy.gov/femp/technologies/renewable%5Fpurchasepower.cfm, www.epa.gov/greenpower/buygreenpower.htm, www.thegreenpowergroup.org/publications.html, www.resource-solutions.org."--Verso. t.p.
Guide to Purchasing Green Power
Author:
Publisher: Environmental Protection Agency
ISBN:
Category : Science
Languages : en
Pages : 52
Book Description
"This guide can be downloaded from: www.eere.energy.gov/femp/technologies/renewable%5Fpurchasepower.cfm, www.epa.gov/greenpower/buygreenpower.htm, www.thegreenpowergroup.org/publications.html, www.resource-solutions.org."--Verso. t.p.
Publisher: Environmental Protection Agency
ISBN:
Category : Science
Languages : en
Pages : 52
Book Description
"This guide can be downloaded from: www.eere.energy.gov/femp/technologies/renewable%5Fpurchasepower.cfm, www.epa.gov/greenpower/buygreenpower.htm, www.thegreenpowergroup.org/publications.html, www.resource-solutions.org."--Verso. t.p.
Design and Performance of Policy Instruments to Promote the Development of Renewable Energy
Author: Gabriela Elizondo Azuela
Publisher: World Bank Publications
ISBN: 0821396021
Category : Business & Economics
Languages : en
Pages : 85
Book Description
Renewable energy plays an important role in contributing to the transition toward low-carbon development growth, in enhancing technology diversification and hedging against fuel price volatility, in strengthening economic growth, and in facilitating access to electricity. The global trends indicate a growing commitment to renewable energy development from developed and developing countries in both the introduction of specific policy levers and investment flows. Developing countries have now a long history of designing and implementing specific policy and regulatory instruments to promote renewable energy. Today, feed-in tariff policies are being implemented in about 25 developing countries and quantity based instruments, most notably auction mechanisms, are increasingly being adopted by upper middle income countries. This paper summarizes the results of a recent review of the emerging experience with the design and implementation of price and quota based instruments to promote renewable energy in a sample of six representative developing countries and transition economies. The paper discusses the importance of a tailor-made approach to policy design and identifies the basic elements that have proven instrumental to policy effectiveness, including adequate tariff levels, long term policy or contractual commitments, mandatory access to the grid and incremental cost pass-through. Ultimately, a low carbon development growth in the developing world depends on the availability of resources to finance the solutions that exhibit incremental costs. Policies introduced to support renewable energy development should be designed and introduced in combination with strategies that clearly identify sources of finance and establish a sustainable incremental cost recovery mechanism (for example, using concessional financial flows from developed countries to leverage private financing, strengthening the performance of utilities and distribution companies, or allowing the partial pass-through of incremental costs to consumer tariffs with a differentiated burden sharing that protects the poor). Without question, policy makers will have to ensure that the design of different policy mechanisms and the policy mix per se deliver renewable energy targets with the lowest possible incremental costs and volume of subsidies.
Publisher: World Bank Publications
ISBN: 0821396021
Category : Business & Economics
Languages : en
Pages : 85
Book Description
Renewable energy plays an important role in contributing to the transition toward low-carbon development growth, in enhancing technology diversification and hedging against fuel price volatility, in strengthening economic growth, and in facilitating access to electricity. The global trends indicate a growing commitment to renewable energy development from developed and developing countries in both the introduction of specific policy levers and investment flows. Developing countries have now a long history of designing and implementing specific policy and regulatory instruments to promote renewable energy. Today, feed-in tariff policies are being implemented in about 25 developing countries and quantity based instruments, most notably auction mechanisms, are increasingly being adopted by upper middle income countries. This paper summarizes the results of a recent review of the emerging experience with the design and implementation of price and quota based instruments to promote renewable energy in a sample of six representative developing countries and transition economies. The paper discusses the importance of a tailor-made approach to policy design and identifies the basic elements that have proven instrumental to policy effectiveness, including adequate tariff levels, long term policy or contractual commitments, mandatory access to the grid and incremental cost pass-through. Ultimately, a low carbon development growth in the developing world depends on the availability of resources to finance the solutions that exhibit incremental costs. Policies introduced to support renewable energy development should be designed and introduced in combination with strategies that clearly identify sources of finance and establish a sustainable incremental cost recovery mechanism (for example, using concessional financial flows from developed countries to leverage private financing, strengthening the performance of utilities and distribution companies, or allowing the partial pass-through of incremental costs to consumer tariffs with a differentiated burden sharing that protects the poor). Without question, policy makers will have to ensure that the design of different policy mechanisms and the policy mix per se deliver renewable energy targets with the lowest possible incremental costs and volume of subsidies.
Renewable Energy Sources and Climate Change Mitigation
Author: Ottmar Edenhofer
Publisher: Cambridge University Press
ISBN: 9781107607101
Category : Science
Languages : en
Pages : 1088
Book Description
This Intergovernmental Panel on Climate Change Special Report (IPCC-SRREN) assesses the potential role of renewable energy in the mitigation of climate change. It covers the six most important renewable energy sources - bioenergy, solar, geothermal, hydropower, ocean and wind energy - as well as their integration into present and future energy systems. It considers the environmental and social consequences associated with the deployment of these technologies, and presents strategies to overcome technical as well as non-technical obstacles to their application and diffusion. SRREN brings a broad spectrum of technology-specific experts together with scientists studying energy systems as a whole. Prepared following strict IPCC procedures, it presents an impartial assessment of the current state of knowledge: it is policy relevant but not policy prescriptive. SRREN is an invaluable assessment of the potential role of renewable energy for the mitigation of climate change for policymakers, the private sector, and academic researchers.
Publisher: Cambridge University Press
ISBN: 9781107607101
Category : Science
Languages : en
Pages : 1088
Book Description
This Intergovernmental Panel on Climate Change Special Report (IPCC-SRREN) assesses the potential role of renewable energy in the mitigation of climate change. It covers the six most important renewable energy sources - bioenergy, solar, geothermal, hydropower, ocean and wind energy - as well as their integration into present and future energy systems. It considers the environmental and social consequences associated with the deployment of these technologies, and presents strategies to overcome technical as well as non-technical obstacles to their application and diffusion. SRREN brings a broad spectrum of technology-specific experts together with scientists studying energy systems as a whole. Prepared following strict IPCC procedures, it presents an impartial assessment of the current state of knowledge: it is policy relevant but not policy prescriptive. SRREN is an invaluable assessment of the potential role of renewable energy for the mitigation of climate change for policymakers, the private sector, and academic researchers.
Energy Management and Energy Efficiency in Industry
Author: Durmuş Kaya
Publisher: Springer Nature
ISBN: 3030259951
Category : Technology & Engineering
Languages : en
Pages : 533
Book Description
This book is presented to demonstrate how energy efficiency can be achieved in existing systems or in the design of a new system, as well as a guide for energy savings opportunities. Accordingly, the content of the book has been enriched with many examples applied in the industry. Thus, it is aimed to provide energy savings by successfully managing the energy in the readers’ own businesses. The authors primarily present the necessary measurement techniques and measurement tools to be used for energy saving, as well as how to evaluate the methods that can be used for improvements in systems. The book also provides information on how to calculate the investments to be made for these necessary improvements and the payback periods. The book covers topics such as: • Reducing unit production costs by ensuring the reduction of energy costs, • Efficient and quality energy use, • Meeting market needs while maintaining competitive conditions, • Ensuring the protection of the environment by reducing CO2 and CO emissions with energy saving and energy efficiency, • Ensuring the correct usage of systems by carrying out energy audits. In summary, this book explains how to effectively design energy systems and manage energy to increase energy savings. In addition, the study has been strengthened by giving some case studies and their results in the fields of intensive energy consumption in industry. This book is an ideal resource for practitioners, engineers, researchers, academics, employees and investors in the fields of energy, energy management, energy efficiency and energy saving.
Publisher: Springer Nature
ISBN: 3030259951
Category : Technology & Engineering
Languages : en
Pages : 533
Book Description
This book is presented to demonstrate how energy efficiency can be achieved in existing systems or in the design of a new system, as well as a guide for energy savings opportunities. Accordingly, the content of the book has been enriched with many examples applied in the industry. Thus, it is aimed to provide energy savings by successfully managing the energy in the readers’ own businesses. The authors primarily present the necessary measurement techniques and measurement tools to be used for energy saving, as well as how to evaluate the methods that can be used for improvements in systems. The book also provides information on how to calculate the investments to be made for these necessary improvements and the payback periods. The book covers topics such as: • Reducing unit production costs by ensuring the reduction of energy costs, • Efficient and quality energy use, • Meeting market needs while maintaining competitive conditions, • Ensuring the protection of the environment by reducing CO2 and CO emissions with energy saving and energy efficiency, • Ensuring the correct usage of systems by carrying out energy audits. In summary, this book explains how to effectively design energy systems and manage energy to increase energy savings. In addition, the study has been strengthened by giving some case studies and their results in the fields of intensive energy consumption in industry. This book is an ideal resource for practitioners, engineers, researchers, academics, employees and investors in the fields of energy, energy management, energy efficiency and energy saving.
The Power of Renewables
Author: Chinese Academy of Engineering
Publisher: National Academies Press
ISBN: 0309160006
Category : Science
Languages : en
Pages : 256
Book Description
The United States and China are the world's top two energy consumers and, as of 2010, the two largest economies. Consequently, they have a decisive role to play in the world's clean energy future. Both countries are also motivated by related goals, namely diversified energy portfolios, job creation, energy security, and pollution reduction, making renewable energy development an important strategy with wide-ranging implications. Given the size of their energy markets, any substantial progress the two countries make in advancing use of renewable energy will provide global benefits, in terms of enhanced technological understanding, reduced costs through expanded deployment, and reduced greenhouse gas (GHG) emissions relative to conventional generation from fossil fuels. Within this context, the U.S. National Academies, in collaboration with the Chinese Academy of Sciences (CAS) and Chinese Academy of Engineering (CAE), reviewed renewable energy development and deployment in the two countries, to highlight prospects for collaboration across the research to deployment chain and to suggest strategies which would promote more rapid and economical attainment of renewable energy goals. Main findings and concerning renewable resource assessments, technology development, environmental impacts, market infrastructure, among others, are presented. Specific recommendations have been limited to those judged to be most likely to accelerate the pace of deployment, increase cost-competitiveness, or shape the future market for renewable energy. The recommendations presented here are also pragmatic and achievable.
Publisher: National Academies Press
ISBN: 0309160006
Category : Science
Languages : en
Pages : 256
Book Description
The United States and China are the world's top two energy consumers and, as of 2010, the two largest economies. Consequently, they have a decisive role to play in the world's clean energy future. Both countries are also motivated by related goals, namely diversified energy portfolios, job creation, energy security, and pollution reduction, making renewable energy development an important strategy with wide-ranging implications. Given the size of their energy markets, any substantial progress the two countries make in advancing use of renewable energy will provide global benefits, in terms of enhanced technological understanding, reduced costs through expanded deployment, and reduced greenhouse gas (GHG) emissions relative to conventional generation from fossil fuels. Within this context, the U.S. National Academies, in collaboration with the Chinese Academy of Sciences (CAS) and Chinese Academy of Engineering (CAE), reviewed renewable energy development and deployment in the two countries, to highlight prospects for collaboration across the research to deployment chain and to suggest strategies which would promote more rapid and economical attainment of renewable energy goals. Main findings and concerning renewable resource assessments, technology development, environmental impacts, market infrastructure, among others, are presented. Specific recommendations have been limited to those judged to be most likely to accelerate the pace of deployment, increase cost-competitiveness, or shape the future market for renewable energy. The recommendations presented here are also pragmatic and achievable.
Advanced Concepts for Renewable Energy Supply of Data Centres
Author: Jaume Salom
Publisher: CRC Press
ISBN: 1000799352
Category : Technology & Engineering
Languages : en
Pages : 337
Book Description
The rapid increase of cloud computing, high performance computing (HPC) and the vast growth in Internet and Social Media use have aroused the interest in energy consumption and the carbon footprint of Data Centres. Data Centres primarily contain electronic equipment used for data processing (servers), data storage (storage equipment), and communications (network equipment). Collectively, this equipment processes, stores, and transmits digital information and is known as information technology (IT) equipment. Advanced Concepts for Renewable Energy Supply of Data Centres introduces a number of technical solutions for the supply of power and cooling energy into Data Centres with enhanced utilisation of renewable energy sources in order to achieve low energy Data Centres. Because of the high energy density nature of these unique infrastructures, it is essential to implement energy efficiency measures and reduce consumption before introducing any renewable energy source. A holistic approach is used with the objective of integrating many technical solutions such as management of the IT (Information Technology) load, efficient electrical supply to the IT systems, Low-Ex air-conditioning systems, interaction with district heating and cooling networks, re-use of heat, free cooling (air, seawater, groundwater), optimal use of heat and cold storage, electrical storage and integration in smart grids. This book is therefore a catalogue of advanced technical concepts that could be integrated into Data Centres portfolio in order to increase the overall efficiency and the share of renewable energies in power and cooling supply. Based on dynamic energy models implemented in TRNSYS some concepts are deeply evaluated through yearly simulations. The results of the simulation are illustrated with Sankey charts, where the energy flows per year within the subsystems of each concept for a selected scenario are shown, and graphs showing the results of parametric analysis. A set of environmental metrics (as the non-renewable primary energy) and financial metrics (CAPEX and OPEX) as well of energy efficiency metrics like the well-known PUE, are described and used to evaluate the different technical concepts.
Publisher: CRC Press
ISBN: 1000799352
Category : Technology & Engineering
Languages : en
Pages : 337
Book Description
The rapid increase of cloud computing, high performance computing (HPC) and the vast growth in Internet and Social Media use have aroused the interest in energy consumption and the carbon footprint of Data Centres. Data Centres primarily contain electronic equipment used for data processing (servers), data storage (storage equipment), and communications (network equipment). Collectively, this equipment processes, stores, and transmits digital information and is known as information technology (IT) equipment. Advanced Concepts for Renewable Energy Supply of Data Centres introduces a number of technical solutions for the supply of power and cooling energy into Data Centres with enhanced utilisation of renewable energy sources in order to achieve low energy Data Centres. Because of the high energy density nature of these unique infrastructures, it is essential to implement energy efficiency measures and reduce consumption before introducing any renewable energy source. A holistic approach is used with the objective of integrating many technical solutions such as management of the IT (Information Technology) load, efficient electrical supply to the IT systems, Low-Ex air-conditioning systems, interaction with district heating and cooling networks, re-use of heat, free cooling (air, seawater, groundwater), optimal use of heat and cold storage, electrical storage and integration in smart grids. This book is therefore a catalogue of advanced technical concepts that could be integrated into Data Centres portfolio in order to increase the overall efficiency and the share of renewable energies in power and cooling supply. Based on dynamic energy models implemented in TRNSYS some concepts are deeply evaluated through yearly simulations. The results of the simulation are illustrated with Sankey charts, where the energy flows per year within the subsystems of each concept for a selected scenario are shown, and graphs showing the results of parametric analysis. A set of environmental metrics (as the non-renewable primary energy) and financial metrics (CAPEX and OPEX) as well of energy efficiency metrics like the well-known PUE, are described and used to evaluate the different technical concepts.
Complementarity Modeling in Energy Markets
Author: Steven A. Gabriel
Publisher: Springer Science & Business Media
ISBN: 1441961232
Category : Business & Economics
Languages : en
Pages : 637
Book Description
This addition to the ISOR series introduces complementarity models in a straightforward and approachable manner and uses them to carry out an in-depth analysis of energy markets, including formulation issues and solution techniques. In a nutshell, complementarity models generalize: a. optimization problems via their Karush-Kuhn-Tucker conditions b. on-cooperative games in which each player may be solving a separate but related optimization problem with potentially overall system constraints (e.g., market-clearing conditions) c. conomic and engineering problems that aren’t specifically derived from optimization problems (e.g., spatial price equilibria) d. roblems in which both primal and dual variables (prices) appear in the original formulation (e.g., The National Energy Modeling System (NEMS) or its precursor, PIES). As such, complementarity models are a very general and flexible modeling format. A natural question is why concentrate on energy markets for this complementarity approach? s it turns out, energy or other markets that have game theoretic aspects are best modeled by complementarity problems. The reason is that the traditional perfect competition approach no longer applies due to deregulation and restructuring of these markets and thus the corresponding optimization problems may no longer hold. Also, in some instances it is important in the original model formulation to involve both primal variables (e.g., production) as well as dual variables (e.g., market prices) for public and private sector energy planning. Traditional optimization problems can not directly handle this mixing of primal and dual variables but complementarity models can and this makes them all that more effective for decision-makers.
Publisher: Springer Science & Business Media
ISBN: 1441961232
Category : Business & Economics
Languages : en
Pages : 637
Book Description
This addition to the ISOR series introduces complementarity models in a straightforward and approachable manner and uses them to carry out an in-depth analysis of energy markets, including formulation issues and solution techniques. In a nutshell, complementarity models generalize: a. optimization problems via their Karush-Kuhn-Tucker conditions b. on-cooperative games in which each player may be solving a separate but related optimization problem with potentially overall system constraints (e.g., market-clearing conditions) c. conomic and engineering problems that aren’t specifically derived from optimization problems (e.g., spatial price equilibria) d. roblems in which both primal and dual variables (prices) appear in the original formulation (e.g., The National Energy Modeling System (NEMS) or its precursor, PIES). As such, complementarity models are a very general and flexible modeling format. A natural question is why concentrate on energy markets for this complementarity approach? s it turns out, energy or other markets that have game theoretic aspects are best modeled by complementarity problems. The reason is that the traditional perfect competition approach no longer applies due to deregulation and restructuring of these markets and thus the corresponding optimization problems may no longer hold. Also, in some instances it is important in the original model formulation to involve both primal variables (e.g., production) as well as dual variables (e.g., market prices) for public and private sector energy planning. Traditional optimization problems can not directly handle this mixing of primal and dual variables but complementarity models can and this makes them all that more effective for decision-makers.
Energy Unlimited
Author: Barbara Maria Albert
Publisher:
ISBN: 9780994577702
Category : Carbon dioxide mitigation
Languages : en
Pages : 274
Book Description
HAVE YOU been tasked with developing a plan to transition your organisation to 100% renewable energy but need more information to make this project a success? DO YOU want to reduce or eliminate fossil fuels in your organisation but need to build a business case to get executives on board? ARE YOU looking to implement energy projects with tangible outcomes that engage staff and that you can report to your stakeholders? ENERGY UNLIMITED is the ultimate guide for senior managers wanting to develop a long term, sustainable energy strategy. Packed with case studies, critical success factors, illustrations and practical examples from the author's experience it provides a powerful, step-by-step framework that will walk you through the end-to-end process of achieving 100% renewable energy for your organisation. Written by sustainability expert Barbara Albert, who is a preferred supplier to Australian state and federal governments, this ?how to? book gives you the opportunity to lead by example in transitioning to a low-carbon economy. Barbara Albert is a sustainability adviser, author, trainer, and speaker. She works with businesses and governments on carbon reduction, energy management, and mapping out the path to 100% renewable energy or zero net emissions. She regularly teaches energy and carbon management and is the founder of Sustainable Business Consulting and co-founder of 100% Renewables. She lives in Sydney, Australia. In Barbara's book, you will learn about:? Drivers for renewable energy targets? Renewable energy technologies? How to improve your energy efficiency so you spend less on energy? How to analyse your energy situation? How to evaluate energy efficiency and renewable energy opportunities? Renewable energy certificates (RECs) and how they relate to renewable energy targets? The difference of behind-the-meter and in-front-of-the-meter renewable energy installations and why this matters? How to develop long term sustainable energy plans? How you can finance and deliver energy projects? How to engage your stakeholders so you can get your projects approved? How to manage organisational change? How to manage your energy project risks
Publisher:
ISBN: 9780994577702
Category : Carbon dioxide mitigation
Languages : en
Pages : 274
Book Description
HAVE YOU been tasked with developing a plan to transition your organisation to 100% renewable energy but need more information to make this project a success? DO YOU want to reduce or eliminate fossil fuels in your organisation but need to build a business case to get executives on board? ARE YOU looking to implement energy projects with tangible outcomes that engage staff and that you can report to your stakeholders? ENERGY UNLIMITED is the ultimate guide for senior managers wanting to develop a long term, sustainable energy strategy. Packed with case studies, critical success factors, illustrations and practical examples from the author's experience it provides a powerful, step-by-step framework that will walk you through the end-to-end process of achieving 100% renewable energy for your organisation. Written by sustainability expert Barbara Albert, who is a preferred supplier to Australian state and federal governments, this ?how to? book gives you the opportunity to lead by example in transitioning to a low-carbon economy. Barbara Albert is a sustainability adviser, author, trainer, and speaker. She works with businesses and governments on carbon reduction, energy management, and mapping out the path to 100% renewable energy or zero net emissions. She regularly teaches energy and carbon management and is the founder of Sustainable Business Consulting and co-founder of 100% Renewables. She lives in Sydney, Australia. In Barbara's book, you will learn about:? Drivers for renewable energy targets? Renewable energy technologies? How to improve your energy efficiency so you spend less on energy? How to analyse your energy situation? How to evaluate energy efficiency and renewable energy opportunities? Renewable energy certificates (RECs) and how they relate to renewable energy targets? The difference of behind-the-meter and in-front-of-the-meter renewable energy installations and why this matters? How to develop long term sustainable energy plans? How you can finance and deliver energy projects? How to engage your stakeholders so you can get your projects approved? How to manage organisational change? How to manage your energy project risks
Biogas Technology
Author: Liangwei Deng
Publisher: Springer
ISBN: 9789811549397
Category : Science
Languages : en
Pages : 363
Book Description
This book focuses on agricultural waste treatment and renewable energy production from the perspective of anaerobic digestion. It covers topics on anaerobic digestion processes and practices in various types of biogas plant construction and management and systematically addresses the principle and main features of three kinds of anaerobic digestion systems: household digesters, biogas septic tanks, and biogas plants. Instructive, informative and easy to understand, the book offers a valuable asset for researchers, technicians, graduate students and managerial personnel working in the areas of renewable energy, agricultural ecological engineering and the treatment and utilization of agricultural wastes.
Publisher: Springer
ISBN: 9789811549397
Category : Science
Languages : en
Pages : 363
Book Description
This book focuses on agricultural waste treatment and renewable energy production from the perspective of anaerobic digestion. It covers topics on anaerobic digestion processes and practices in various types of biogas plant construction and management and systematically addresses the principle and main features of three kinds of anaerobic digestion systems: household digesters, biogas septic tanks, and biogas plants. Instructive, informative and easy to understand, the book offers a valuable asset for researchers, technicians, graduate students and managerial personnel working in the areas of renewable energy, agricultural ecological engineering and the treatment and utilization of agricultural wastes.
United States Code
Author: United States
Publisher:
ISBN:
Category : Law
Languages : en
Pages : 1420
Book Description
"The United States Code is the official codification of the general and permanent laws of the United States of America. The Code was first published in 1926, and a new edition of the code has been published every six years since 1934. The 2012 edition of the Code incorporates laws enacted through the One Hundred Twelfth Congress, Second Session, the last of which was signed by the President on January 15, 2013. It does not include laws of the One Hundred Thirteenth Congress, First Session, enacted between January 2, 2013, the date it convened, and January 15, 2013. By statutory authority this edition may be cited "U.S.C. 2012 ed." As adopted in 1926, the Code established prima facie the general and permanent laws of the United States. The underlying statutes reprinted in the Code remained in effect and controlled over the Code in case of any discrepancy. In 1947, Congress began enacting individual titles of the Code into positive law. When a title is enacted into positive law, the underlying statutes are repealed and the title then becomes legal evidence of the law. Currently, 26 of the 51 titles in the Code have been so enacted. These are identified in the table of titles near the beginning of each volume. The Law Revision Counsel of the House of Representatives continues to prepare legislation pursuant to 2 U.S.C. 285b to enact the remainder of the Code, on a title-by-title basis, into positive law. The 2012 edition of the Code was prepared and published under the supervision of Ralph V. Seep, Law Revision Counsel. Grateful acknowledgment is made of the contributions by all who helped in this work, particularly the staffs of the Office of the Law Revision Counsel and the Government Printing Office"--Preface.
Publisher:
ISBN:
Category : Law
Languages : en
Pages : 1420
Book Description
"The United States Code is the official codification of the general and permanent laws of the United States of America. The Code was first published in 1926, and a new edition of the code has been published every six years since 1934. The 2012 edition of the Code incorporates laws enacted through the One Hundred Twelfth Congress, Second Session, the last of which was signed by the President on January 15, 2013. It does not include laws of the One Hundred Thirteenth Congress, First Session, enacted between January 2, 2013, the date it convened, and January 15, 2013. By statutory authority this edition may be cited "U.S.C. 2012 ed." As adopted in 1926, the Code established prima facie the general and permanent laws of the United States. The underlying statutes reprinted in the Code remained in effect and controlled over the Code in case of any discrepancy. In 1947, Congress began enacting individual titles of the Code into positive law. When a title is enacted into positive law, the underlying statutes are repealed and the title then becomes legal evidence of the law. Currently, 26 of the 51 titles in the Code have been so enacted. These are identified in the table of titles near the beginning of each volume. The Law Revision Counsel of the House of Representatives continues to prepare legislation pursuant to 2 U.S.C. 285b to enact the remainder of the Code, on a title-by-title basis, into positive law. The 2012 edition of the Code was prepared and published under the supervision of Ralph V. Seep, Law Revision Counsel. Grateful acknowledgment is made of the contributions by all who helped in this work, particularly the staffs of the Office of the Law Revision Counsel and the Government Printing Office"--Preface.