Improved Energy Efficiency in the Aluminium Industry and Its Supply Chains.

• Superior document: Linköping Studies in Science and Technology. Dissertations Series ; v.2063
• Author: Haraldsson, Joakim.
• Place / Publishing House: Linköping : : Linkopings Universitet,, 2020.; {copy}2020.
• Year of Publication: 2020
• Edition: 1st ed.
• Language: English
• Series: Linköping Studies in Science and Technology. Dissertations Series
• Physical Description: 1 online resource (148 pages)

Table of Contents

Intro -- Abstract -- Sammanfattning -- Appended papers -- Other publications not included in the thesis -- Acknowledgements -- Abbreviations -- Table of contents -- 1 Introduction -- 1.1 Motivation for research -- 1.2 Aim and research questions -- 1.3 Scope and delimitations -- 1.4 Paper overview and co-author statement -- 1.5 Other papers not included in the thesis -- 1.6 Research journey -- 2 Aluminium industry and aluminium casting foundries -- 2.1 Production processes -- 2.1.1 Electrolysis and alloying -- 2.1.2 Recycling and alloying -- 2.1.3 Generation of skimmings, dross and salt slag -- 2.1.4 Casting -- 2.1.5 Profile extrusion -- 2.1.6 Rolling -- 2.1.7 Heat treatment -- 2.1.8 Anodic oxidation (anodising) -- 2.1.9 Energy use -- 2.2 The Swedish aluminium industry and aluminium casting foundries -- 3 Concepts and definitions -- 3.1 Energy efficiency improvement and energy saving -- 3.2 Supply chains -- 3.3 Primary energy factor -- 3.4 Assessment of GHG emissions -- 4 Previous research -- 4.1 Improved energy efficiency in the aluminium industry -- 4.2 Supply chains in relation to improved energy efficiency and reduced environmental impact -- 4.3 The impact of energy efficiency measures on primary energy use, GHG emissions, and energy and CO2 costs -- 4.4 Barriers, drivers and information sources -- 5 Description of system levels and cases -- 5.1 System levels -- 5.2 Cases studied -- 6 Methods and approaches -- 6.1 Research design -- 6.2 Literature review -- 6.3 Calculation of the effects of energy efficiency measures on primary energy use, GHG emissions and related costs -- 6.3.1 General assumptions -- 6.3.2 The energy efficiency measures studied -- 6.3.3 Choice of electricity -- 6.3.4 Calculation of effects on primary energy use, GHG emissions, and energy and CO2 costs -- 6.4 Focus groups -- 6.5 Questionnaires -- 6.5.1 Questionnaire 1.

6.5.2 Questionnaire 2 -- 7 Results and analysis -- 7.1 Existence of energy efficiency gap and changes in priority of energy issues -- 7.2 Improved energy efficiency within the individual companies -- 7.2.1 Energy efficiency measures found in literature -- 7.2.2 Effects on primary energy use, GHG emissions, and related costs from improved energy efficiency in the electrolysis process -- 7.2.3 Degree of implementation of energy efficiency measures -- 7.2.4 Energy saving potentials for the companies -- 7.3 Improved energy efficiency in the entire supply chains -- 7.3.1 Energy efficiency measures for supply chains -- 7.3.2 Energy efficiency improvement potentials for supply chains -- 7.4 Factors hindering or driving improved energy efficiency -- 8 Discussion -- 8.1 Energy efficiency measures -- 8.2 Energy efficiency improvement and energy saving potentials -- 8.3 Factors affecting the work to improve energy efficiency -- 8.4 Achieving carbon neutrality in the production and processing of aluminium -- 8.5 Generalisability of the results -- 8.6 Relevant recipients of the results -- 9 Conclusions -- 9.1 Research question 1 -- 9.2 Research question 2 -- 10 Further work -- References -- Appendix A: Energy efficiency measures included in the first questionnaire -- Appendix B: Energy efficiency measures identified in literature -- Appendix C: Ratings of barriers and drivers.