Efficiency Of Heat And Work In A Regional Energy System
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Efficiency Of Heat And Work In A Regional Energy System
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Author : Tommy Rosén
language : en
Publisher: Linköping University Electronic Press
Release Date : 2019-12-11
Efficiency Of Heat And Work In A Regional Energy System written by Tommy Rosén and has been published by Linköping University Electronic Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019-12-11 with categories.
One of the largest flows of energy in Swedish municipalities is the fuel-energy flow through the regional combined heat and power (CHP) plant. The customer products from this flow are mainly electricity to the electricity grid and heat to the building sector. There are many ways to describe and examine this fuel-energy flow, and there are many perspectives. This thesis presents one perspective. It is a top-down, analytical and numerical perspective on the efficiency of heat and work in a regional energy system. The analysis focus on the present situation in Linköping municipality and aims at describing the energy efficiency improvement potential. Three subsystems are considered, the regional production of electricity, the regional production of heat, and the regional public transport by bus. These three systems are physically all heat engines i.e. engines that derive work and/or heat from fuel combustion processes. It is important to notice that the analysis in this thesis does not describe the theoretical improvement potential, that potential is considerably higher than the implementable potential, but of no practical use. Instead the analysis is as far as possible based on real world measured efficiencies and efficiency values of best practice (Best available technology). The analysis shows that hardware investments at the CHP plant can improve the electricity generation efficiency and thereby reduce CO2 emissions. The investments are in high pressure turbines, medium pressure turbines and preheaters. The size of the improvement is hard to quantify because it depends partly on unknown factors in the surrounding electricity market. In the studied system CO2 reduction could be as high as 40 - 60 %. The regionally produced biogas would be used more efficiently if it were used in the local combined cycle gas turbine instead of being used in internal combustion engines in buses. The buses would instead be electrically driven. This use of biogas would create a better integrated fuel-energy flow and reduce heat losses. Another improvement is to reduce the system temperatures in the district heating system. The study shows that the efficiency gains, because of lower system temperatures, would increase electricity production by about 1 – 3%, and that greenhouse gas emissions would be reduced by 4 – 20%. However, these improvements are dependent on demand side investments in the district heating system and are therefore slow to implement. Ett av de största energiflödena i svenska kommuner är bränsle/energi-flödet genom det regionala kraftvärmeverket. De konsumentprodukter som detta energiflöde producerar är främst uppvärmning av bostäder och elkraft. Det finns många sätt att beskriva och utvärdera detta bränsle/energi-flöde och det finns många olika perspektiv. Det här arbetet analyserar energiflödet med en analytisk ”top-down” metod. Analysen utgår ifrån den nuvarande situationen i Linköpings kommun och avser att belysa den förbättringspotential som finns med avseende på systemets verkningsgrad. Tre delsystem har studerats, det regionala systemet för värmeproduktion, det regionala systemet för elproduktion och det regionala kollektivtrafiksystemet för innerstadstrafik med buss. Dessa tre system är fysikaliskt värmemotorer d.v.s. de är system som nyttjar termisk energi från förbränningsprocesser för att utföra ett arbete och/eller generera värme. Det är viktigt att notera att analyserna i detta arbete inte avser att beskriva en teoretisk förbättringspotential. Analyserna avser istället att belysa den praktiska, implementerbara, förbättringspotentialen. Därför har arbetet så långt som möjligt utgått ifrån uppmätta data och numeriska värden på verkningsgrader ifrån redan existerande anläggningar eller tekniska komponenter. Analyserna visar att hårdvaruinvesteringar i det lokala kraftvärmeverket skulle öka elproduktionen och därigenom sänka koldioxidutsläppen. De investeringar som skulle behöva göras är investeringar i högtrycksturbiner, mellantrycksturbiner och förvärmare. De sänkta koldioxidutsläppen är svåra att kvantifiera eftersom de delvis beror på okända faktorer på den omgivande elmarknaden. Reduktionen av koldioxidutsläppen skulle kunna vara så stor som 40 - 60 %. Den lokalt producerade biogasen skulle användas mer effektivt om den användes i den lokala gaskombi-anläggningen istället för att användas som bussbränsle som är det nuvarande användningsområdet för detta bränsle. Bussarna skulle istället kunna ersättas med elbussar. En sådan förändring av biogas-användningen skulle innebära ett bättre integrerat energisystem med lägre värmeförluster. En annan möjlig förbättring av kraftvärmesystemet är att sänka returtemperaturerna i fjärrvärmesystemet. Analyserna visar att elverkningsgraden skulle förbättras 1 – 3 % och att koldioxidutsläppen skulle kunna minska med 4 – 20 %. Dessa förbättringar skulle däremot kräva investeringar på kraftvärmesystemets kundsida och bedöms därför vara långsamma att implementera.
Power To X In Regional Energy Systems
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Author : Amjad Anvari-Moghaddam
language : en
Publisher: CRC Press
Release Date : 2025-04-30
Power To X In Regional Energy Systems written by Amjad Anvari-Moghaddam and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2025-04-30 with Science categories.
Power-to-X in Regional Energy Systems discusses the role of these technologies in achieving a carbon-neutral economy and the impact on the energy markets, with implications for electricity, gas, hydrogen, and ancillary services. It focuses on the challenges and benefits of implementing PtX technologies in regional-scale applications. Emphasizing the role of PtX technologies as enablers of sector coupling, the book provides a comprehensive understanding of how these technologies integrate and interact with the industry, transportation, and residential sectors. It describes the significance of PtX, optimal planning, and cost-effective operation of PtX technologies across different sectors and the impact of PtX devices on energy markets. The book considers investing in PtX technologies and contributing to the transition to a sustainable economy. The book will interest professionals and policymakers working in various energy sectors. Researchers and academics in electrical engineering, power systems, renewable energy, and energy economics will also find the content useful.
Integrated Energy System Modeling And Simulation
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Author : Haoyong Chen
language : en
Publisher: Springer Nature
Release Date : 2025-05-02
Integrated Energy System Modeling And Simulation written by Haoyong Chen and has been published by Springer Nature this book supported file pdf, txt, epub, kindle and other format this book has been release on 2025-05-02 with Technology & Engineering categories.
This book provides an in-depth introduction to the dynamic characteristics of Integrated Energy Systems (IES). It establishes a unified energy network model, elucidating the complementarities between various forms of energy, the conversion efficiencies, and the interactions and influences on operating costs. The book proposes methods for the planning, configuration, and operational control of IES and develops a simulation system for the integration of multi-physical field analog, hybrid transient, and steady-state conditions. The established mathematical models and simulation system are utilized to conduct a series of analyses under typical integrated energy scenarios. These analyses evaluate the operational performance and economic benefits of IES across different conditions. This book serves as a valuable resource for professionals involved in the research, planning, design, consulting, research and development, and operation of businesses related to integrated energy systems. It also serves as an essential reference for educators and college students.
Achieving High Performance Federal Facilities
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Author : National Research Council
language : en
Publisher: National Academies Press
Release Date : 2011-11-07
Achieving High Performance Federal Facilities written by National Research Council and has been published by National Academies Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011-11-07 with Technology & Engineering categories.
The design, construction, operation, and retrofit of buildings is evolving in response to ever-increasing knowledge about the impact of indoor environments on people and the impact of buildings on the environment. Research has shown that the quality of indoor environments can affect the health, safety, and productivity of the people who occupy them. Buildings are also resource intensive, accounting for 40 percent of primary energy use in the United States, 12 percent of water consumption, and 60 percent of all non-industrial waste. The processes for producing electricity at power plants and delivering it for use in buildings account for 40 percent of U.S. greenhouse gas emissions. The U.S. federal government manages approximately 429,000 buildings of many types with a total square footage of 3.34 billion worldwide, of which about 80 percent is owned space. More than 30 individual departments and agencies are responsible for managing these buildings. The characteristics of each agency's portfolio of facilities are determined by its mission and its programs. In 2010, GSA's Office of Federal High-Performance Green Buildings asked the National Academies to appoint an ad hoc committee of experts to conduct a public workshop and prepare a report that identified strategies and approaches for achieving a range of objectives associated with high-performance green federal buildings. Achieving High-Performance Federal Facilities identifies examples of important initiatives taking place and available resources. The report explores how these examples could be used to help make sustainability the preferred choice at all levels of decision making. Achieving High-Performance Federal Facilities can serve as a valuable guide federal agencies with differing missions, types of facilities, and operating procedures.
Scientific And Technical Aerospace Reports
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Author :
language : en
Publisher:
Release Date : 1983
Scientific And Technical Aerospace Reports written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1983 with Aeronautics categories.
Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Energy A Continuing Bibliography With Indexes
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Author :
language : en
Publisher:
Release Date : 1976
Energy A Continuing Bibliography With Indexes written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1976 with Fuel categories.
Comprehensive Energy Systems
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Author : Ibrahim Dincer
language : en
Publisher: Elsevier
Release Date : 2018-02-07
Comprehensive Energy Systems written by Ibrahim Dincer and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-02-07 with Science categories.
Comprehensive Energy Systems, Seven Volume Set provides a unified source of information covering the entire spectrum of energy, one of the most significant issues humanity has to face. This comprehensive book describes traditional and novel energy systems, from single generation to multi-generation, also covering theory and applications. In addition, it also presents high-level coverage on energy policies, strategies, environmental impacts and sustainable development. No other published work covers such breadth of topics in similar depth. High-level sections include Energy Fundamentals, Energy Materials, Energy Production, Energy Conversion, and Energy Management. Offers the most comprehensive resource available on the topic of energy systems Presents an authoritative resource authored and edited by leading experts in the field Consolidates information currently scattered in publications from different research fields (engineering as well as physics, chemistry, environmental sciences and economics), thus ensuring a common standard and language
Energy Abstracts For Policy Analysis
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Author :
language : en
Publisher:
Release Date : 1983
Energy Abstracts For Policy Analysis written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1983 with Power resources categories.
State Foreign Operations And Related Programs Appropriations For Fiscal Year
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Author : United States. Congress. Senate. Committee on Appropriations
language : en
Publisher:
Release Date : 2007
State Foreign Operations And Related Programs Appropriations For Fiscal Year written by United States. Congress. Senate. Committee on Appropriations and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007 with Economic assistance, American categories.
The Emerging Form Of Smart Grid Smart Integrated Energy Systems And Prosumer Centred Energy Community
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Author : Tao Huang
language : en
Publisher: Frontiers Media SA
Release Date : 2022-07-07
The Emerging Form Of Smart Grid Smart Integrated Energy Systems And Prosumer Centred Energy Community written by Tao Huang and has been published by Frontiers Media SA this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022-07-07 with Technology & Engineering categories.