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Industry and the energy market - optimal choice of measures using the MIND method
Linköping University, Department of Mechanical Engineering, Energy Systems. Linköping University, The Institute of Technology.
Linköping University, Department of Management and Engineering, Energy Systems. Linköping University, The Institute of Technology.
Linköping University, Department of Management and Engineering, Energy Systems. Linköping University, The Institute of Technology.
2002 (English)In: CRIS Conference on Power Systems and Communications Infrastructures for the future, 2002, China: CRIS, International Institute for Critical Infrastructures , 2002Conference paper, Published paper (Refereed)
Abstract [en]

No abstract available.

Place, publisher, year, edition, pages
China: CRIS, International Institute for Critical Infrastructures , 2002.
Keyword [en]
MIND, Industrial energy systems
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:liu:diva-39960Local ID: 51866OAI: oai:DiVA.org:liu-39960DiVA: diva2:260809
Conference
Power Systems and Communication Systems Infrastructures for the Future International Conference (CRIS'2002) September 23-27, 2002, Beijing, China
Available from: 2009-10-10 Created: 2009-10-10 Last updated: 2013-02-11
In thesis
1. Using exergy and optimization models to improve industrial energy systems towards sustainability
Open this publication in new window or tab >>Using exergy and optimization models to improve industrial energy systems towards sustainability
2004 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

With finite natural resources and large energy demands in the world, a sustainable development approach becomes increasingly important in the improvement of energy systems. The concept of sustainability is examined with relation to exergy flows on the earth. The present industrial society is obviously not sustainable. The main aim of this study is to analyze and improve industrial energy systems towards an increased sustainability.

Exergy analysis is used for evaluating energy systems and for guiding efficiency-improvement efforts. An existing optimization method is improved and applied to an energy system in order to maximize its economic feasibility and profitability. Life cycle analysis based on exergy is applied in order to further guide towards sustainable development. This thesis offers tools to better evaluate energy systems with regard to physical resource use, economy and environment. These tools are particularly useful for decision-making in long-term plarming.

The concepts and methods presented are useful in the design and optimization of more sustainable energy systems, particularly in industrial processes. A typical Swedish industry, a pulp and board mill, is examined using an improved optimization method together with the exergy method. The main cause of the low exergy efficiency in the mill is irreversibility of combustion and of heat transfer in the steam generator. The change in the price of electricity has a greater effect on the energy cost than the change in the price of fuel, which means a unified European electricity market has large impact on the Swedish industry. Increasing efficiency of processes usually minimizes environmental damage and maximizes economic benefits. In spite of increasing the exergy loss switching from fossil fuel to bio-fuels can decrease the net CO2 emission as well as the energy cost, and is a step towards increased sustainability. The investments in an oil-bark boiler, evaporation plant and recovery boiler give a good supply of sustainable resources, a reduction of environmental impact, and both energy and economical saving. In addition, with replacing the present evaporation plant with the non-conventional one, even more benefits could be achieved. Still, there are more potential for further improvement in the mill.

Place, publisher, year, edition, pages
Linköping: Linköpings universitet, 2004. 86 p.
Series
Linköping Studies in Science and Technology. Dissertations, ISSN 0345-7524 ; 868
National Category
Engineering and Technology
Identifiers
urn:nbn:se:liu:diva-22859 (URN)2200 (Local ID)91-7373-933-2 (ISBN)2200 (Archive number)2200 (OAI)
Public defence
2004-04-23, Kvalitetstekniks seminarierum, Hus A, Linköpings Universitet, Linköping, 10:15 (Swedish)
Opponent
Available from: 2009-10-07 Created: 2009-10-07 Last updated: 2013-01-08
2. Analysing strategic energy-related investments in process industries: applied studies at a pulp and board mill
Open this publication in new window or tab >>Analysing strategic energy-related investments in process industries: applied studies at a pulp and board mill
2002 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

The potential to reduce energy demand in industrial applications is often substantiaL Since energy cost represents a considerable share of the value added in several categories of process industries, a great potential exists for cutting costs through investment, for instance in energy efficiency improvements. However, industrial energy systems form complex relations not only within the industrial unit, but also in the interaction with their surroundings. Consequently, issues such as energy prices and governmental regulations influence the systems to varying extents. At the moment environmental issues, as manifested in the Kyoto agreement, and the new common European electricity market are in focus and are likely to influence the different boundary conditions that face European industries. Therefore, when major investments are to take place, changes in such boundary conditions need to be considered.

Analysing potential investments in industrial energy systems require advanced methods that manage these complex relations and interactions and concurrently consider technical, economic and environmental issues. The purpose of the thesis is to develop and co-ordinate such methods and apply them to investments in an existing process industry. A method based on optimisation is used as the main tool for analysis. Other methods are applied as complements, for example to manage different aggregation levels and to facilitate sensitivity analyses.

A pulp and board mill in central Sweden is used as a case study, where investments and changes in the utility systems and the main processes are analysed. These investments are subject to changes in boundary conditions and other mill-specific changes, showing both potentially interesting investments, and also the extensive influence of different boundary conditions. It is also shown that the methods used are appropriate for the purpose at hand.

Place, publisher, year, edition, pages
Linköping: Linköpings universitet, 2002. 96 p.
Series
Linköping Studies in Science and Technology. Dissertations, ISSN 0345-7524 ; 791
Keyword
MIND, Industrial energy systems, Investment, pulp and paper
National Category
Engineering and Technology
Identifiers
urn:nbn:se:liu:diva-39957 (URN)51863 (Local ID)91-7373-476-4 (ISBN)51863 (Archive number)51863 (OAI)
Public defence
2002-12-11, Planck's hörsal, Fysikhuset, Linköpings Universitet, Linköping, 10:15 (Swedish)
Opponent
Available from: 2009-10-10 Created: 2009-10-10 Last updated: 2013-02-11

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Gong, MeiKarlsson, MagnusSöderström, Mats

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