Keynote Speaker I
Prof. Harald Richter
Clausthal University of Technology, Germany
Speech Title: RePowerBuf II - A Hybrid Energy Storage
Abstract: Measurements, scientists have made in a wind park of 13 turbines by sampling data with high frequency, show that fluctuations in the wind velocity, and thus also in the electric power output, reach frequencies significantly higher than 1 Hz in their power spectrum. This is surprising because one could expect that higher frequencies would have been averaged between the turbines and thus fully nullified, but this is not the case. As reasons for that behaviour were identified turbulences at the turbine propellers, together with the intrinsic nature of wind. Even more surprising: high-speed measurements of sun irradiation in a sensor field show the same behaviour. Also here, a complete nullifying of higher frequencies does not occur, although the energy deposited in harmonic waves of 1 Hz and higher is less by 4 orders of magnitude than in the wind case. As a consequence, a smart power grid must have energy storages that operate at different time scales with different capacities which decrease with higher frequencies to compensate for renewables’ fluctuations. RePowerBuf II is a a proposal for such a hybrid energy storage which is based on 1.) a Power-to-Gas-to-Power (PtGtP) storage that covers the frequency range of 1 week to 30 minutes, 2.) a fuel-cell stack-storage that is responsible for the range of 30 minutes to 1 minute, and 3.) a Li-ion battery-pack that covers the range of 1 minute to 10 ms. Their capacities decrease by 1:1/30:1/1800, while their speeds increase by the same factors. Two LC-filters deliver the energies of higher-frequency harmonics to the 2nd and 3rd storage so that they can smooth them, while the PtGtP storage compensates low-frequency fluctuations only. In the presentation, the concept of RePowerBuf II is presented, together with a block diagram and implementation suggestions.
Biography: Harald Richter got a ‘Dipl.-Ing.‘ diploma degree in Electrical Engineering with specialisation in Computer Engineering from the University of Stuttgart, Germany. H received a ‘Dr.-Ing.‘ degree in Electrical Engineering from Munich University of Technology, and in 1998, he acquired a ‘Dr. rer.nat.habil.‘ degree in Computer Engineering from the same University. Since 2000, he has the chair of Technical Informatics and Computer Systems at Clausthal University of Technology, where he works until today. He teaches computer organization and computer networks. His research interests are Cloud Computing, Real-Time Communication in Computer Networks, Renewable Energies and High-Performance Computing and Simulation.
Keynote Speaker II
Prof. Carlos Henggeler Antunes,
University of Coimbra, Portugal
Speech Title: Exploiting the Flexibility of Residential Energy Resources Through Demand Response
Abstract: The technological basis offered by smart grids is expected to foster the emergence a load follows supply pattern in electricity usage, motivated by the need to increase the penetration of renewable generation sources as a crucial component of the decarbonisation of economy. Price signals conveyed by dynamic tariffs schemes, determined according to supply availability and grid conditions, will expectedly be used to change load usage profiles under demand response programs. In face of energy prices with frequent and possibly large variations, consumer will be required to make the most of their flexibility in the usage of some appliances to lower the energy bill while taking into account comfort requirements regarding the provision of energy services (room heating/cooling, hot water, electric vehicle charging, dish/cloth washer operation, etc.). This active role of consumers can be made operational by an energy management system endowed with the consumer preferences regarding preferred time slots for the operation of loads and thermostat settings. A model is presented considering the minimization of the electricity bill and the possible discomfort associated with changes in the habitual appliance functioning, which can be integrated in a residential energy management system to control appliance operation on behalf of the consumer. Algorithmic aspects and illustrative results of distinct cost vs. comfort trade-offs will be presented.
Biography: Carlos Henggeler Antunes holds a PhD in Electrical Engineering (specialization in Optimization and Systems Theory), from the University of Coimbra in 1992. He is currently a Professor at the Department of Electrical and Computer Engineering, Faculty of Sciences and Technology, University of Coimbra. He is member of the coordination committee of the Energy for Sustainability Initiative of the University of Coimbra. His areas of interest are multi-objective optimization, optimization using meta-heuristics, multi-criteria analysis, as well as energy systems and policies, with particular focus on energy efficiency and demand response. He has participated in several national and international R&D projects and in specialized consulting for companies. He is author of about two hundred papers in journals, book chapters and conference proceedings. He is co-author of the book "Multiobjective Linear and Integer Programming”.
Keynote Speaker III
Prof. Dr.-Ing. Thomas Glotzbach
University of Applied Science in Darmstadt, Germany
Speech title: Hydrogen and Fuel Cells – Key Technology for the Energy Revolution
Abstract: The impact of global CO2 pollution can be mitigated by renewable energies, combined with a more efficient usage of all energy types. However, Renewables belong to the category of fluctuating energy producers. Their increased use has an impact on the balance between the generated and consumed power. It is estimated that the power grid will get out of balance if their fraction exceeds 50 – 60 % of the overall production. For this reason, storages will be needed for future energy supply. Such storages must be able to conserve and retrieve energy at different time sales: hours, days, weeks and months. Batteries will be used for the compensation of hourly and daily fluctuations. For longer periods, however, only gas storages are applicable. By electrolysis, surplus Renewable electricity can be converted into hydrogen which can be stored in turn in the public gas grid, at least up to a certain percentage to satisfy heat demands. Additionally, it can be re-converted into electricity by gas-operated power-plants. Finally, it can be stored apart from the gas grid and converted back when needed via fuel cells. Hydrogen thus offers a high potential for a decentralized energy supply. Moreover, a stable and independent power supply in various energy sectors can be ensured by it, because its underlying technologies have already proven to be reliable and to work with acceptable efficiencies. To summarize: water electrolysis and fuel cells will be the solution for a flexible integration of renewable energies into the energy mix. These technologies form a road from nuclear and fossil-fuel energy to the future and they will play an important role in our energy systems. This keynote speech will talk about the status and the hindrances on this path.
Biography: Thomas Glotzbach was born in Hilders/Germany in 1973. In 2005, he got a ‘Dipl.-Ing.‘ diploma degree in Electrical Engineering with specialization in Measurement and Control Technology from the University of Kassel. In 2010, he received a ‘Dr.-Ing.‘ degree in Electrical Engineering from University of Kassel for his work at the Fraunhofer Institute for Wind Energy and Energy System Technology (Fraunhofer IWES). Since 2012, he is Professor at the University of Applied Science in Darmstadt, Germany, at the Department of Electrical Engineering and Information Technology, division of Renewable Power Generation and Energy Storages. His lectures are on Renewable Energies, Electrical Power Supply, Hydrogen Technology and Fuel Cells. His research interests include Renewable Energies, Autarkical Power Supplies for Buildings, Hydrogen Technology and Fuel Cells.
Plenary Speaker I
Prof. Michele Tartaglia, Politecnico di Torino, Italy
Plenary Speaker II
Prof. Marc Alier
Universitat Politècnica de Catalunia, BarcelonaTECH, Spain(UPC)
Marc Alier (1971) is an associate professor at UPC, book author, speaker, blogger, podcaster, and luthier. He received an engineering degree in computer science and a Ph.D. in Sustainable Development in the Polytechnical University of Catalonia (UPC). The last 20 years has worked in research and development related to the e-learning industry. He has participated in the development of several LMS and authoring tools and has been an online teacher. Since 2001, he has taught project management, information systems architectures, and computer science history and ethics. He is has been director of a master's programs in Mobile Apps Development, Business Intelligence, Cloud computing and Community Management at UPC School. Since early 2004, he has been a developer of the http://moodle.org community contributing with third-party modules and core functionalities such as the Wiki module and the Webservices architecture and the IMS LTI consumer. Alier is also a podcaster at http://mossegalapoma.cat and http://zetatesters.com. Author of more than 100 publications in conferences and Scientific Journals, is the lead researcher of the http://sushitos.essi.upc.edu research group and has been lead researcher of several research projects funded by the EU, the Spanish Government, and Google.
Plenary Speaker III
Dr. Kathryn Janda
University of Oxford&University College London, UK
Katy earned undergraduate degrees in electrical engineering and English literature from Brown University and her M.S. and Ph.D. from the Energy and Resources Group at the University of California at Berkeley. She has worked in the Energy Analysis Program at Lawrence Berkeley National Laboratory and served as an American Association for the Advancement of Science Environmental Policy Fellow in the U.S. Environmental Protection Agency’s ENERGY STAR program. Prior to joining the ECI, she held a position as assistant professor of Environmental Studies at Oberlin College for five years, where she pursued her research interests and taught courses such as energy production and consumption; fundamentals of building performance; environment and society; a practicum on ecological design; solar music; dynamics of consumption; and qualitative research methods.
Katy has studied the interface between social and technical systems in the built environment since 1990 and is particularly interested in why different organisations and social groups decide to promote or reject environmental technologies, particularly in non-domestic settings. Social groups she has studied include: building designers, environmental advocates, and building users. Technical systems she studies include energy-efficiency techniques and green building strategies. Her research encompasses three principal areas: Social dimensions of energy use; Social, economic and environmental implications of ecological design; The relationship between environmental technology adoption and organizational decision-making.
Katy leads the Energy, Organisations, and Society theme within the ECI's Energy Research programme. Her work explores the role of building professionals in creating 'middle-out’ change; implications of data availability and ownership in the commercial real estate industry (including green leasing); and energy management practices in universities, offices, stores, churches, theaters, and small businesses. She is lead author and research director of the WICKED project which works with technical, legal and organisational infrastructure in the retail sector to create knowledge and develop energy strategies for owners, landlord, and tenants. She led the COALESCE knowledge exchange project with industry partner CO2 Estates. For Phase 2 of the UK Energy Research Centre (2009-14), she co-led the “Energy Use in Buildings” and led the “Social and Organisational Aspects of Energy Use” themes. She also led the Worldwide Status of Energy Standards for Buildings project, an investigation of the worldwide status of energy standards for buildings in more than 80 countries linked to the legal status and building sector coverage of the standards in different countries.
Prof. Dr.-Ing. Thomas Glotzbach, University of Applied Science in Darmstadt, Germany
Hydrogen and Fuel Cells - Key Technology for the Energy Revolution
The impact of global CO2 pollution can be mitigate by renewable energies, combined with a variety of more efficient use of energy. Renewable energy generators are among the fluctuating energy producers. The increasing use of renewable energies generally have an effect on the balance between the generated and consumed power. The system can get out of balance. For this reason, storage will be necessary for the future energy supply. These storages must be able to store energy of different periods: hours, days, weeks and months. For the compensation of hours and days will be used batteries, for example. For the longer periods, only gas can be use. By electrolysis, excess current can be convert to hydrogen. This generated hydrogen can be stored into the German gas network to a certain percentage. The gas thus stored will be use for the heat demand. However, it can also been converted into electricity by using gas power plants. Hydrogen can also be stored in pure form. By means of a fuel cell, it can then easily been converted back into electrical energy.