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Past seminars at IEA in 2017

Past seminars in 2017, 2016, 2015, 2014, 2013, 2012, 2011, 2010, 2009, 2008, 2007, 2006, 2005, 2004, 2003, 2002, 2001, 2000, 1999, 1998


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19 June 2017, 11:00, M:IEA (seminar room)

Master Thesis presentation:

" Current ripple simulation in DC traction voltage system of an electric bus "

Linda Nilsson and Filip Gard

Supervisor: Philip Abrahamsson (IEA)

Examiner: Prof. Mats Alaküla (IEA)


Friday 16 June 2017, 10:30, M:IEA (seminar room)

Master Thesis presentation:

" Kontrollsystem för automatisk vagnföljning till skogsvagnar - modellering, konstruktion, byggnation och test "

Måns Lundberg

Supervisor: Gunnar Lindstedt (IEA)

Examiner: Johan Björnstedt (IEA)


Thursday 15 June 2017, 11:15, M:IEA (seminar room)

Master Thesis presentation:

" Mitigation of flux produced by geomagnetically induced currents (GIC) on power transformers with delta windings "

Henrik Jönsson, Victor Lovén

Supervisor: Prof. Olof Samuelsson (IEA)

Examiner: Avo Reinap (IEA)


Tuesday 13 June 2017, 10:30, M:IEA (seminar room)

Master Thesis presentation:

" WPP design and analysis - An assessment of wake effects and power fluctuations from large-scale wind power plant clusters "

David Eickhoff

Supervisor: Jörgen Svensson (IEA)

Examiner: Prof. Olof Samuelsson (IEA)


Tuesday 12 June 2017, 10:30, M:IEA (seminar room)

Master Thesis presentation:

" Hur dimensionerar vi framtidens elnät? Fallstudie med avseende på e-mobilitet "

Oscar Ingvarsson

Supervisor: Pontus Jonasson, Andreas Wikström (Kraftringen), Prof. Olof Samuelsson (IEA)

Examiner: Jörgen Svensson (IEA)


Thursday 8 June 2017, 10:30, M:IEA (seminar room)

Master Thesis presentation:

" The effects of international standards on the design of a micro grid in rural areas "

Magdalena Sandung

Supervisor: Niel Hancock (ÅF), Prof. Olof Samuelsson (IEA)

Examiner: Jörgen Svensson (IEA)


Wednesday 7 June 2017, 10:30, M:IEA (seminar room)

Master Thesis presentation:

" Water Removal from Protective Glass "

Max Guidotti and Michael Båth Halldén

Supervisor: Johan Kjörnsberg (Axis), John Åkesson (Axis) , Oscar Strand (Axis) , Gunnar Lindstedt (IEA)

Examiner: Johan Björnstedt (IEA)


Friday June 9, at 10:15 a.m., hall M:B (Mechanical Engineering building, Ole Römers väg 1, Lund)

Ph.D. Defense and Presentation:

" Benchmark Simulation Model for Integrated Urban Wastewater Systems "

Ramesh Saagi

Abstract:
The integrated urban wastewater system (UWS) consists of different sections that are interconnected. These include: i) catchment; ii) sewer network; iii) wastewater treatment plant (WWTP); and finally, iv) receiving water system. Traditionally, these sections are operated and evaluated individually. However, it is now well-established that all the sections of an UWS should be operated in a holistic manner in order to improve the receiving water quality.

The thesis aims at developing an integrated model library that can be used to simulate the dynamics of flow rate and pollutant loads in all the sections of an UWS on a single simulation platform. It is further aimed at defining a hypothetical UWS using the model library, so that future users can use the pre-defined layout to study multiple control strategies and structural modifications. In order to facilitate an objective evaluation of the results, criteria for evaluating river water quality as well as the sewer network and WWTP performance are described.

Firstly, the suitability of existing model libraries is assessed. The building blocks from the Dynamic Influent Pollutant Disturbance Scenario Generator (DIPDSG) are used as the starting point for the catchment and sewer network model library. Additional model blocks that are missing in the DIPDSG are developed. A modified version of the Benchmark Simulation Model No. 2 (BSM2) is used to simulate the WWTP. Model blocks for river water quality assessment are developed.

Using the model library, a hypothetical UWS for an urban catchment with 80 000 population equivalents and an area of 540 hectares is described. The UWS layout is used to develop and evaluate different control strategies (local/integrated) and structural modifications. The case studies indicate that: i) the presented model library and the layout can be used to develop various control strategies and evaluate their impact on river water quality; and ii) improving the performance of an individual section does not necessarily lead to better river water quality. It is expected that the model library will be widely used as an open-source software toolbox for benchmarking purposes, integrated modelling studies as well as for modelling the individual sections.

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Supervisors:
Assoc. Prof. Ulf Jeppsson (Lund University, Sweden)
Prof. Krist V. Gernaey (Technical University of Denmark)
Dr. Xavier Flores-Alsina (Technical University of Denmark)

External examiner:
Dr. Luca Vezzaro (Technical University of Denmark)

Examination committee:
Prof. Dirk Muschalla (University of Graz, Austria)
Prof. Maria Viklander (Luleå University of Technology, Sweden)
Dr. Manfred Schütze (ifak, Germany)
Prof. Miklas Scholz (Lund University, Sweden (alternate))

Chairman:
Assoc. Prof. Jörgen Svensson (Lund University, Sweden)


Wednesday 24 May 2017, 10:30, M:IEA (seminar room)

Master Thesis presentation:

" Energy Harvesting for Electronic Systems "

Oscar Ridell and Pål Nilsson

Supervisors: Mats Larsson (Axis), Jonas Sjögren (Axis), Gunnar Lindstedt (IEA)

Examiner: Johan Björnstedt (IEA)


Friday May 19, at 10:15 a.m., hall M:B (Mechanical Engineering building, Ole Römers väg 1, Lund)

Ph.D. Defense and Presentation:

"Extending Wastewater Treatment Process Models for Phosphorus Removal and Recovery - A Framework for Plant-Wide Modelling of Phosphorus, Sulfur and Iron"

Kimberley Solon

Abstract:
As problems associated with shortage in resource supply arise, wastewater treatment plants turn to innovation to transform themselves into resource recovery facilities. Water groups worldwide recognize that wastewater treatment plants are no longer disposal facilities but rather sources of clean water, energy and nutrients.

The thesis aims at developing an integrated model library that can be used to simulate the dynamics of flow rate and pollutant loads in all the sections of an UWS on a single simulation platform. It is further aimed at defining a hypothetical UWS using the model library, so that future users can use the pre-defined layout to study multiple control strategies and structural modifications. In order to facilitate an objective evaluation of the results, criteria for evaluating river water quality as well as the sewer network and WWTP performance are described.

One of the most important resources that can be recovered from wastewater treatment plants is phosphorus. Mathematical modelling can be utilised to analyse various operational strategies to recover phosphorus from the wastewater. However, incorporating phosphorus transformation processes in plant-wide models is complex. Firstly, the tri-valence of phosphates suggests non-ideality, which requires the use of a physico-chemical model to account for this non-ideality. Secondly, phosphorus has strong interlinks with sulfur and iron, which necessitates inclusion of their transformations in biological and physico-chemical models. Lastly, consolidating these into a plant-wide model aimed at describing phosphorus removal and/or recovery requires interfacing, modifications to the plant layout, addition of recovery unit processes and development of new control and operational strategies. The research work presented in this thesis addresses the aforementioned challenges.

A physico-chemical model is developed to take into account ion activity corrections, ion pairing effects, aqueous phase chemical equilibria, multiple mineral precipitation and gas stripping/adsorption. The model is then linked with standard approaches used in wastewater engineering, such as the Activated Sludge Model Nos. 1, 2d and 3 (ASM1, 2d, 3) and the Anaerobic Digestion Model No. 1 (ADM1). The extensions of the ASM2d and ADM1 with phosphorus, sulfur and iron-related conversions followed. And finally, the extended models and the physico-chemical model are consolidated into a plant-wide model provided by the Benchmark Simulation Model No. 2. The resulting model is used for simulation-based scenario analysis for finding ways to improve the operation of a wastewater treatment plant aimed at phosphorus removal and recovery.

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Supervisors:
Assoc. Prof. Ulf Jeppsson (Lund University, Sweden)
Prof. Krist V. Gernaey (Technical University of Denmark)
Dr. Xavier Flores-Alsina (Technical University of Denmark)

External examiner:
Assoc. Prof. Paloma Grau (University of Navarra and CEIT, SanSebastian, Spain)

Examination committee:
Prof. Aurora Seco (University of Valencia, Spain)
Assoc. Prof. Juan Baeza (Universitat Autònoma de Barcelona, Spain)
Dr. Hélène Hauduc (Dynamita, Nyons, France)
Assoc. Prof. Hariklia Gavala (Technical University of Denmark (alternate))

Chairman:
Prof. Olof Samuelsson (Lund University, Sweden)


Friday 24 March 2017, 10:30, M:IEA (seminar room)

Master Thesis presentation:

" Network loading and tariffs today and with electric vehicles - Exploiting data from 1 million customers "

Hampus Lavin and Axel Philipson

Supervisor: Prof. Olof Samuelsson (IEA), Rickard Venetjoki (E.ON Elnät)

Examiner: Jörgen Svensson (IEA)


Friday February 10, at 10:15 a.m., hall M:B (Mechanical Engineering building, Ole Römers väg 1, Lund)

Ph.D. Defense and Presentation:

"Modeling and Testing of Insulation Degradation due to Dynamic Thermal Loading of Electrical Machines"

Zhe Huang

Abstract:
Electrical machines in electrified vehicles are subjected to dynamic loadings at different driving conditions, which results in dynamic temperatures. The aging of the Electrical Insulation System (EIS) in electrical machines is caused by these dynamic temperatures, namely high average temperatures and temperature cycles. In addition, the degradation of EIS affects the lifetime of the electrical machine. In this thesis, three cornerstones for lifetime estimation of electrical machines in electrified vehicles are identified and studied, which are the usage, the degradation mechanisms and the lifetime model. A combination of computational simulation and lab testing is required to design a comprehensive model. Furthermore, the indicators of EIS degradations and the diagnostic methods of stator segments (or motorettes) and electrical machines with aged insulations are studied. A system thermal model, including a drivetrain model of vehicles, a loss and cooling model and a thermal model of electrical machines, is proposed to predict the temperature distribution inside the electrical machine of an electrified vehicle. The estimated dynamic temperature at the hotspot is one of the inputs to a lifetime model of the electrical machines. To identify the degradation mechanisms of the EIS under the dynamic temperatures, both enameled wires and motorette specimens are tested with accelerated degradation tests. It is found that the aging of the EIS of an electrical machine subjected to the dynamic temperature is not only caused by oxidation of insulations with high average temperature, but also caused by the fatigue of insulations due to thermal-mechanical stress induced by the temperature or thermal cycles. A revised lifetime model of electrical machines is proposed, which covers both aging mechanisms mentioned above. Another input to the lifetime model, the thermalmechanical stress is estimated by Finite Element Analysis (FEA) using Ansys Structure simulation. The condition monitoring approaches are simulated by both electrostatic FEA model and analytical model and implemented during the accelerated degradation testings. These approaches assess the State of Health of the EIS of motorette specimens . Insulation capacitance shows more consistent trends during aging at different stress levels compared to insulation resistance. Insulation capacitance reduction of 4 to 6% and 11 to 12% are found between winding and winding and i between winding and ground, respectively. A diagnostic method is proposed for measuring the high frequency current with a voltage pulse simply set by the drive of an electrical machine. The migration of both amplitude and frequency of the current detected are indications of aging of the insulation system of an electrical machine due to the decrease of the insulation capacitance.

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Supervisors:
Prof. Mats Alaküla (Lund University, Sweden)
Senior Lecturer Avo Reinap (Lund University, Sweden)

External examiner:
Prof. Elias Strangas (Michigan State University, USA)

Examination committee:
Prof. Pascal Maussion (Université de Toulouse, France)
Prof. Sture Eriksson (Sture Eriksson R&D consultancy)
Assoc. Prof. Sonja Lundmark (Chalmers, Göteborg)
Dr. Rafal Wrobel (University of Bristol, UK)

Chairman:
Assoc. Prof. Ulf Jeppsson (Lund University, Sweden)


Tuesday 24 January 2017, 10:30, M:IEA (seminar room)

Master Thesis presentation:

" Current ripple simulation in DC traction voltage system of an electric bus "

Christian Lugnberg and David Wenander

Supervisor: Per Widek (Volvo), Philip Abrahamsson (IEA)

Examiner: Prof. Mats Alaküla (IEA)


Monday 16 January 2017, 10:30, M:IEA (seminar room)

Master Thesis presentation:

" Commercial and Technical evaluation of Vehicle to Home "

Ellinor Forsström and Sara Persson

Supervisor: Alf Larsen (Eon Elnät), Jörgen Svensson (IEA)

Examiner: Prof. Olof Samuelsson (IEA)


19 January 2017, 15:15, M:IEA (seminar room)

Redovisning av kursen Ingenjörsinriktad yrkesträning:

"En undersökning av länders nya möjligheter på energimarknaden"

Magdalena Sandung, ÅF

"Kompetensutveckling inom ÅF T&D Sverige"

Carl Bredberg, ÅF



Past seminars at IEA in previous years
2017, 2016, 2015, 2014, 2013, 2012, 2011, 2010, 2009, 2008, 2007, 2006, 2005, 2004, 2003, 2002, 2001, 2000, 1999, 1998