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Prof. Dr. Jutta Geldermann was appointed to be professor for Business Administration and Production Management at the University of Duisburg-Essen in 2018. After her diploma degree in industrial engineering, obtaining her doctorate and postdoctoral lecturing qualification at the University of Karlsruhe (now KIT - Karlsruhe Institute of Technology), she was Chair Holder and Professor of Production and Logistics at the Georg-August-University of Göttingen from 2007 to 2018. Her research focuses on the modelling and optimisation of production and logistics systems, including the use of methods for multi-criteria decision support and life-cycle assessment (LCA). She has successfully conducted more than 40 research projects funded by industry, DFG, Volkswagen Foundation, the European Union (EU) and various ministries. She is editor of the EURO Journal on Decision Processes and EURO representative of the German Society of Operations Research (GOR). She was also Visiting Researcher/Professor at the following institutions: Manchester Business School, University of Perugia, University of Auckland, Universidad de Concepción, Tongji University (Shanghai), City University of Hongkong, etc.
The assessment of future options and pathways for sustainable energy systems requires considering multiple techno-economic, ecological and social issues. Multicriteria analysis methods, which are useful tools that aid decision processes involving various and even conflicting qualitative and quantitative criteria, could support such comprehensive analyses. With regard to energy policies, the key actors and stakeholders’ acceptance of emerging and innovative technologies for generating, converting and storing electricity, heat and fuels is crucial for their future implementation. The multiactor multicriteria (MAMCA) methodology was developed to involve stakeholders with vastly different views and objectives when addressing complex societal problems. We extend the MAMCA methodology to include the outranking approach PROMETHEE, which allows us to explicitly consider the stakeholders’ objectives in the evaluation process. The MAMCA method with PROMETHEE is applied to a case study of four different transition pathways of providing electricity to a bioenergy village in Germany. The explicit mapping at hand of an illustrative case study could help researchers and decision makers greatly in the assessment of pathways for sustainable energy systems; it is also applicable in other contexts requiring extensive stakeholder involvement and where qualitative and quantitative criteria are to be considered simultaneously. The detailed sensitivity analysis provided by the extension of the MAMCA method with PROMETHEE not only reveals the stakeholders’ crucial trade-offs when allowing each stakeholder group to develop its own set of criteria and weights but also indicates compromise options.
Sebastian Schär; Jutta Geldermann. Adopting Multiactor Multicriteria Analysis for the Evaluation of Energy Scenarios. Sustainability 2021, 13, 2594 .
AMA StyleSebastian Schär, Jutta Geldermann. Adopting Multiactor Multicriteria Analysis for the Evaluation of Energy Scenarios. Sustainability. 2021; 13 (5):2594.
Chicago/Turabian StyleSebastian Schär; Jutta Geldermann. 2021. "Adopting Multiactor Multicriteria Analysis for the Evaluation of Energy Scenarios." Sustainability 13, no. 5: 2594.
Providing consumers with groceries generates large quantities of waste at various supply-chain stages. Packaging-free supermarkets like “Original Unverpackt” (OU) in Berlin (Germany) aim to reduce this waste and the associated negative environmental impacts. To date, there have been no studies with comprehensive, quantitative environmental data for packaging-free supermarkets. In analyzing the OU model, our goal is to analyze the potential environmental advantages of packaging-free supermarkets, quantify and identify the potential changes of environmental burden on this example. A comparative Life Cycle Assessment (LCA) for six typical OU-supermarket product packages - chia-seeds, shower gel, fruit bears, dishwashing detergent, noodles and tofu is conducted. Following ISO 14040 and ISO 14044 guidelines, we compare the OU product packaging types to their conventionally packaged counterparts. First, seven impact categories according to the LCA impact assessment methodology “ReCiPe Midpoint (Hierarchist) without long term” are examined. These seven categories are then aggregated to generate an overall result. To test the stability of the results, the parameters are varied in a sensitivity analysis. In the impact category, “climate change” four out of six OU product packaging types perform better than their counterparts. However, the package of fruit bears at OU performs 45% worse than the counterpart, due to extra effort required to clean the dispenser. An 83% increase in greenhouse gas emissions for the OU tofu package made of glass results mainly from the production of the glass and its transport. Although the OU packaging strategy performs relatively well, there is still room for improvement. Here, considering the entire supply chain plays an important role, since customer behavior, cleaning processes, the choice of packaging material, and the means of transport significantly affect the LCA.
Christina Scharpenberg; Meike Schmehl; Milena Glimbovski; Jutta Geldermann. Analyzing the packaging strategy of packaging-free supermarkets. Journal of Cleaner Production 2021, 292, 126048 .
AMA StyleChristina Scharpenberg, Meike Schmehl, Milena Glimbovski, Jutta Geldermann. Analyzing the packaging strategy of packaging-free supermarkets. Journal of Cleaner Production. 2021; 292 ():126048.
Chicago/Turabian StyleChristina Scharpenberg; Meike Schmehl; Milena Glimbovski; Jutta Geldermann. 2021. "Analyzing the packaging strategy of packaging-free supermarkets." Journal of Cleaner Production 292, no. : 126048.
Fuel production from hydrogen and carbon dioxide is considered an attractive solution as long-term storage of electric energy and as temporary storage of carbon dioxide. A large variety of CO2 sources are suitable for Carbon Capture Utilization (CCU), and the process energy intensity depends on the separation technology and, ultimately, on the CO2 concentration in the flue gas. Since the carbon capture process emits more CO2 than the expected demand for CO2 utilization, the most sustainable CO2 sources must be selected. This work aimed at modeling a Power-to-Gas (PtG) plant and assessing the most suitable carbon sources from a Life Cycle Assessment (LCA) perspective. The PtG plant was supplied by electricity from a 2030 scenario for Italian electricity generation. The plant impacts were assessed using data from the ecoinvent database version 3.5, for different CO2 sources (e.g., air, cement, iron, and steel plants). A detailed discussion on how to handle multi-functionality was also carried out. The results showed that capturing CO2 from hydrogen production plants and integrated pulp and paper mills led to the lowest impacts concerning all investigated indicators. The choice of how to handle multi-functional activities had a crucial impact on the assessment.
Eleonora Bargiacchi; Nils Thonemann; Jutta Geldermann; Marco Antonelli; Umberto Desideri. Life Cycle Assessment of Synthetic Natural Gas Production from Different CO2 Sources: A Cradle-to-Gate Study. Energies 2020, 13, 4579 .
AMA StyleEleonora Bargiacchi, Nils Thonemann, Jutta Geldermann, Marco Antonelli, Umberto Desideri. Life Cycle Assessment of Synthetic Natural Gas Production from Different CO2 Sources: A Cradle-to-Gate Study. Energies. 2020; 13 (17):4579.
Chicago/Turabian StyleEleonora Bargiacchi; Nils Thonemann; Jutta Geldermann; Marco Antonelli; Umberto Desideri. 2020. "Life Cycle Assessment of Synthetic Natural Gas Production from Different CO2 Sources: A Cradle-to-Gate Study." Energies 13, no. 17: 4579.
M. Hoßfeld, C. Ackermann und T. Dietz beschreiben die Restrukturierung der Wertschöpfungsnetzwerke und Geschäftsmodelle der Mobilität der Zukunft. Grundlage für die erwartete Effizienzsteigerung in der Produktion und der Produktoptimierung ist ein neues Verständnis des Plattformbegriffs, der – basierend auf offenen Soft- und Hardwareschnittstellen – alle am Wertschöpfungsnetzwerk beteiligten Akteure in den Innovationsprozess einbindet.
Jutta Geldermann; Pedro José Marrón; Frederik Ahlemann. Kurzfassung. Neue Dimensionen der Mobilität 2020, 421 -422.
AMA StyleJutta Geldermann, Pedro José Marrón, Frederik Ahlemann. Kurzfassung. Neue Dimensionen der Mobilität. 2020; ():421-422.
Chicago/Turabian StyleJutta Geldermann; Pedro José Marrón; Frederik Ahlemann. 2020. "Kurzfassung." Neue Dimensionen der Mobilität , no. : 421-422.
Nils Lerche; Ines Wilkens; Meike Schmehl; Swantje Eigner-Thiel; Jutta Geldermann. Using methods of Multi-Criteria Decision Making to provide decision support concerning local bioenergy projects. Socio-Economic Planning Sciences 2019, 68, 100594 .
AMA StyleNils Lerche, Ines Wilkens, Meike Schmehl, Swantje Eigner-Thiel, Jutta Geldermann. Using methods of Multi-Criteria Decision Making to provide decision support concerning local bioenergy projects. Socio-Economic Planning Sciences. 2019; 68 ():100594.
Chicago/Turabian StyleNils Lerche; Ines Wilkens; Meike Schmehl; Swantje Eigner-Thiel; Jutta Geldermann. 2019. "Using methods of Multi-Criteria Decision Making to provide decision support concerning local bioenergy projects." Socio-Economic Planning Sciences 68, no. : 100594.
Lars-Peter Lauven; Jutta Geldermann; Umberto Desideri. Estimating the revenue potential of flexible biogas plants in the power sector. Energy Policy 2019, 128, 402 -410.
AMA StyleLars-Peter Lauven, Jutta Geldermann, Umberto Desideri. Estimating the revenue potential of flexible biogas plants in the power sector. Energy Policy. 2019; 128 ():402-410.
Chicago/Turabian StyleLars-Peter Lauven; Jutta Geldermann; Umberto Desideri. 2019. "Estimating the revenue potential of flexible biogas plants in the power sector." Energy Policy 128, no. : 402-410.
Cascaded wood utilisation could help to bridge the gap between the rising wood demand and fresh wood availability as well as contributing to a circular economy. However, the economic and environmental implications of cascading wood-based products are not fully known yet and are hence explored in this paper, considering both aspects simultaneously for the first time. The study focuses on the production of the following five products in an integrated system: medium-density fibre, oriented-strand board, particleboard, coated paper and wood pellets. Firstly, a multi-objective optimisation model has been developed to minimise the costs and greenhouse gas emissions of cascaded utilisation of wood. The ε-constraint method has been used to solve the model and derive Pareto optimal solutions. The latter have been used to select two cascaded-utilisation scenarios and compare their environmental performance with two other scenarios: current situation and the use of fresh wood only. The environmental impacts have been estimated using life cycle assessment. The results reveal that cascaded utilisation is more environmentally and economically sustainable than the current situation or the use of fresh wood. One of the scenario (Scenario 2) reduces the impacts by 1%-23% on the current situation; the global warming potential (GWP) is lower by 15%. However, the costs in this scenario are only 4% lower. In another (Scenario 1), the costs are lower by 24% but the reductions in impacts are more limited, ranging from 1%-8% relative to the Reference scenario with the GWP being only 1% lower. The cascaded use of wood also offers the potential to save up to 35% of fresh wood resources, thus contributing to a circular economy. Using only fresh wood (Scenario 3) is the worst option, increasing the costs by 13% while offering small or no environmental benefits in most of the impacts. These results will be of interest to the wood industry, forestry authorities and policy makers.
Mohammad Sadegh Taskhiri; Harish Jeswani; Jutta Geldermann; Adisa Azapagic. Optimising cascaded utilisation of wood resources considering economic and environmental aspects. Computers & Chemical Engineering 2019, 124, 302 -316.
AMA StyleMohammad Sadegh Taskhiri, Harish Jeswani, Jutta Geldermann, Adisa Azapagic. Optimising cascaded utilisation of wood resources considering economic and environmental aspects. Computers & Chemical Engineering. 2019; 124 ():302-316.
Chicago/Turabian StyleMohammad Sadegh Taskhiri; Harish Jeswani; Jutta Geldermann; Adisa Azapagic. 2019. "Optimising cascaded utilisation of wood resources considering economic and environmental aspects." Computers & Chemical Engineering 124, no. : 302-316.
Products derived from crude oil form the basis for large segments of energy and production systems. However, the availability of crude oil is limited and the combustion of fossil fuels contributes to global warming. Biorefineries can produce a product portfolio similar to that of crude-oil refineries from renewable resources and thus promote transformation towards a more sustainable bioeconomy. The actual product portfolio of a given biorefinery, however, depends on the choice and capacity of the production units used to upgrade raw materials to marketable products. Thus, to improve biorefinery product competitiveness, we apply an algorithm that combines an exact optimization algorithm nested in an Evolutionary Strategy with Geographic Information Systems to determine a wood-based biorefinery's optimal configuration, capacity, and location within the Cariboo District in Canada. The results indicate that there are numerous locations with similarly attractive economic potentials for biorefineries with 450,000 to 550,000 tons of biomass input capacity in the investigated area.
T. Schröder; L.-P. Lauven; T. Sowlati; Jutta Geldermann. Strategic planning of a multi-product wood-biorefinery production system. Journal of Cleaner Production 2018, 211, 1502 -1516.
AMA StyleT. Schröder, L.-P. Lauven, T. Sowlati, Jutta Geldermann. Strategic planning of a multi-product wood-biorefinery production system. Journal of Cleaner Production. 2018; 211 ():1502-1516.
Chicago/Turabian StyleT. Schröder; L.-P. Lauven; T. Sowlati; Jutta Geldermann. 2018. "Strategic planning of a multi-product wood-biorefinery production system." Journal of Cleaner Production 211, no. : 1502-1516.
Today, decision making in politics and businesses should aim for sustainable development, and one field of action is the transformation of energy systems. To reshape energy systems towards renewable energy resources, it has to be decided today on how to accomplish the transition. Energy scenarios are widely used to guide decision making in this context. While considerable effort has been put into developing energy scenarios, researchers have pointed out three requirements for energy scenarios that are not fulfilled satisfactorily yet: The development and evaluation of energy scenarios should (1) incorporate the concept of sustainability, (2) provide decision support in a transparent way, and (3) be replicable for other researchers. To meet these requirements, we combine different methodological approaches: story-and-simulation (SAS) scenarios, multi-criteria decision making (MCDM), information modeling, and co-simulation. We show how the combination of these methods can lead to an integrated approach for development and sustainability evaluation of energy scenarios assisted by automated information exchange. We concretize this approach with a sustainability evaluation process (SEP) model and an information model. We highlight, which artifacts are developed during the SEP and how the information model can help to automate the information exchange in this process. The objectives are to facilitate a sustainable development of the energy sector and to make the development and decision support processes of energy scenarios more transparent.
Jan Sören Schwarz; Tobias Witt; Astrid Nieße; Jutta Geldermann; Sebastian Lehnhoff; Michael Sonnenschein. Towards an Integrated Development and Sustainability Evaluation of Energy Scenarios Assisted by Automated Information Exchange. Programmieren für Ingenieure und Naturwissenschaftler 2018, 3 -26.
AMA StyleJan Sören Schwarz, Tobias Witt, Astrid Nieße, Jutta Geldermann, Sebastian Lehnhoff, Michael Sonnenschein. Towards an Integrated Development and Sustainability Evaluation of Energy Scenarios Assisted by Automated Information Exchange. Programmieren für Ingenieure und Naturwissenschaftler. 2018; ():3-26.
Chicago/Turabian StyleJan Sören Schwarz; Tobias Witt; Astrid Nieße; Jutta Geldermann; Sebastian Lehnhoff; Michael Sonnenschein. 2018. "Towards an Integrated Development and Sustainability Evaluation of Energy Scenarios Assisted by Automated Information Exchange." Programmieren für Ingenieure und Naturwissenschaftler , no. : 3-26.
Investment and policy decisions in the context of sustainable development are classic application areas for multi-criteria decision analysis. Ranking various pathways, i.e. conversion routes, for biomass use in the energy sector is particularly challenging. Depending on how ecological, economic, and social criteria are weighed, a multi-criteria decision analysis can lead to significantly contrasting recommendations. In this paper, we present a decision support for eleven energy pathways using decision criteria drawn from all three sustainability dimensions—ecological, economic, and social. For the graphical presentation of the relatively large number of pathways and criteria weightings, we introduce a novel visualization approach that combines the results of both PROMETHEE I and II. This visualization approach permits stakeholders to quickly and intuitively gather insights about the result structure and the consequences of different input parameters, for instance different criteria weightings.
Tim Schröder; Lars-Peter Lauven; Beatriz Beyer; Nils Lerche; Jutta Geldermann. Using PROMETHEE to assess bioenergy pathways. Central European Journal of Operations Research 2018, 27, 287 -309.
AMA StyleTim Schröder, Lars-Peter Lauven, Beatriz Beyer, Nils Lerche, Jutta Geldermann. Using PROMETHEE to assess bioenergy pathways. Central European Journal of Operations Research. 2018; 27 (2):287-309.
Chicago/Turabian StyleTim Schröder; Lars-Peter Lauven; Beatriz Beyer; Nils Lerche; Jutta Geldermann. 2018. "Using PROMETHEE to assess bioenergy pathways." Central European Journal of Operations Research 27, no. 2: 287-309.
In horticultural settings, mixing problems arise when choosing a suitable growth substrate for potted plants. The aim of practitioners is to choose a pot and a growth substrate mixture such that environmental emissions and costs are simultaneously minimized. The impact of the plant’s quality on the selling price should also be considered. The decision problem outlined here is affected by two types of uncertainty. First, the problem parameters are uncertain due to the nature of the input data. For example variations in the agronomic characteristics of the growth media and in the weather conditions lead to imprecision. Second, the composition of the growth media is generally not implemented exactly due to variability in the mixing process itself. If these uncertainties are ignored, the problem can be addressed using deterministic multiobjective optimization. If these uncertainties are to be considered, the problem can be addressed by means of robust multiobjective optimization. In this paper, we apply both a deterministic and a robust approach to the problem, with and without uncertainty. We present a case study of an Italian plant nursery and we compare deterministic and robust solutions. Our results show that the robust solutions are preferable to the deterministic ones, and that the robust approach is indeed worth considering for horticultural mixing problems and might also be used effectively in other settings where similar mixing decisions arise.
Corinna Krüger; Francesco Castellani; Jutta Geldermann; Anita Schöbel. Peat and pots: An application of robust multiobjective optimization to a mixing problem in agriculture. Computers and Electronics in Agriculture 2018, 154, 265 -275.
AMA StyleCorinna Krüger, Francesco Castellani, Jutta Geldermann, Anita Schöbel. Peat and pots: An application of robust multiobjective optimization to a mixing problem in agriculture. Computers and Electronics in Agriculture. 2018; 154 ():265-275.
Chicago/Turabian StyleCorinna Krüger; Francesco Castellani; Jutta Geldermann; Anita Schöbel. 2018. "Peat and pots: An application of robust multiobjective optimization to a mixing problem in agriculture." Computers and Electronics in Agriculture 154, no. : 265-275.
In Italy, composting olive mill waste has become a common practice, since it mitigates the environmental problems associated with spreading the waste on land. Compost can be used to prepare growth media for plant nursery cultivation as a substitute for peat, a non-renewable resource whose extraction has long raised environmental concerns. Here, we investigate two common composting procedures—open windrow and static-pile in gas-permeable bags—and compare them to evaluate their environmental impact. We perform a cradle-to-grave life cycle assessment (LCA) in accordance with ISO 14040 and 14044. The LCA considers carbon storage in the soil after 100 years, fugitive greenhouse gas (GHG) emissions, and the impacts avoided by substituting for peat. We use cumulative energy demand, global warming potential (GWP), acidification potential, and eutrophication potential indicators in a contribution analysis and explore how the re-use of olive pits for energy production and reduction of commercial fertilizers improves the environmental balance. We also present a scenario analysis that indicates how parameter fluctuations affect the results. Our study shows that peat’s impacts can be significantly reduced from 1162.3 to 96.3 kg CO2-eq/Mg for open windrow compost or 43.1 kg CO2-eq/Mg for static-pile compost in gas-permeable bags. For static-pile composting, the lack of volatile organic compound and ammonia emissions and the detection of oxygen concentrations above 12% vol. suggest fully aerobic conditions. Fugitive greenhouse gas emissions were the most important contributions to the GWP. In the contribution analysis for static-pile composting, the avoidance of compost spreading and the carbon storage effect (due to compost usage) contributed 54% of the overall impacts to GWP and between 21 and 45% to the other indicators. This LCA study illustrates how horticulturists can improve their resource management practices by recycling olive mill waste materials. Proper management of composting unit aeration can reduce fugitive GHG emissions.
Francesco Castellani; Alessandro Esposito; Jutta Geldermann; Roberto Altieri. Life cycle assessment of passively aerated composting in gas-permeable bags of olive mill waste. The International Journal of Life Cycle Assessment 2018, 24, 281 -296.
AMA StyleFrancesco Castellani, Alessandro Esposito, Jutta Geldermann, Roberto Altieri. Life cycle assessment of passively aerated composting in gas-permeable bags of olive mill waste. The International Journal of Life Cycle Assessment. 2018; 24 (2):281-296.
Chicago/Turabian StyleFrancesco Castellani; Alessandro Esposito; Jutta Geldermann; Roberto Altieri. 2018. "Life cycle assessment of passively aerated composting in gas-permeable bags of olive mill waste." The International Journal of Life Cycle Assessment 24, no. 2: 281-296.
Purpose Energy scenarios have long been successfully used to inform decision-making in energy systems planning, with a wide range of different methodological approaches for developing and evaluating them. The purpose of this study is to analyze the existing approaches and classify them with a morphological box. Design/methodology/approach This paper builds upon the methodological literature on developing and evaluating energy scenarios and presents a morphological box, which comprises parameters describing the scenario properties, (energy system) model properties, scientific practice and institutional settings of energy scenarios. The newly developed morphological box is applied to four selected energy scenarios of the German energy transition. Findings The morphological box is a suitable tool to classify current energy scenarios. The exemplary application also points toward four challenges in the current practice of energy scenario development and evaluation: increasing complexity of decision problems, transparency of the scenario development process, transparency of the decision support process and communication of uncertainty. Originality/value The morphological box of energy scenarios helps researchers soundly document and present their methodological approaches for energy scenario development and evaluation. It also facilitates the work of analysts who want to classify, interpret and compare energy scenarios from a methodological perspective. Finally, it supports the identification of gaps between current practice and the methodological literature on energy scenarios, leading to the development of new types of energy scenarios.
Tobias Witt; Katharina Stahlecker; Jutta Geldermann. Morphological analysis of energy scenarios. International Journal of Energy Sector Management 2018, 12, 525 -546.
AMA StyleTobias Witt, Katharina Stahlecker, Jutta Geldermann. Morphological analysis of energy scenarios. International Journal of Energy Sector Management. 2018; 12 (4):525-546.
Chicago/Turabian StyleTobias Witt; Katharina Stahlecker; Jutta Geldermann. 2018. "Morphological analysis of energy scenarios." International Journal of Energy Sector Management 12, no. 4: 525-546.
Advanced biomass conversion plants can replace fossil resources in the electricity, heat, transportation fuels and chemicals sectors, but they face specific challenges with regard to their economic operation. When choosing a capacity for a biomass conversion plant, economies of scale must be weighed against the transportation costs for the widely-distributed input materials. Here, we model the problem of determining the optimal capacity for plants with a single product or a fixed set of products using a single optimization variable and two alternative economic objective functions. To identify the factors that most strongly influence economic plant operation, we perform a sensitivity analysis of various model parameters to determine their impact on the optimal solution using the Envelope Theorem. We also present an optimization approach for simultaneously planning the capacity and configuration of multi-product plants. By modeling economies of scale on a process-specific level, our nonlinear optimization approach makes it possible to determine the optimal configurations, and thus ranges of products, for changing plant capacities. An examination of the obtained feasible solutions shows that the optimization problem is neither convex nor concave.
Lars-Peter Lauven; Ingo Karschin; Jutta Geldermann. Simultaneously optimizing the capacity and configuration of biorefineries. Computers & Industrial Engineering 2018, 124, 12 -23.
AMA StyleLars-Peter Lauven, Ingo Karschin, Jutta Geldermann. Simultaneously optimizing the capacity and configuration of biorefineries. Computers & Industrial Engineering. 2018; 124 ():12-23.
Chicago/Turabian StyleLars-Peter Lauven; Ingo Karschin; Jutta Geldermann. 2018. "Simultaneously optimizing the capacity and configuration of biorefineries." Computers & Industrial Engineering 124, no. : 12-23.
Tim Schröder; Lars-Peter Lauven; Jutta Geldermann. Improving biorefinery planning: Integration of spatial data using exact optimization nested in an evolutionary strategy. European Journal of Operational Research 2018, 264, 1005 -1019.
AMA StyleTim Schröder, Lars-Peter Lauven, Jutta Geldermann. Improving biorefinery planning: Integration of spatial data using exact optimization nested in an evolutionary strategy. European Journal of Operational Research. 2018; 264 (3):1005-1019.
Chicago/Turabian StyleTim Schröder; Lars-Peter Lauven; Jutta Geldermann. 2018. "Improving biorefinery planning: Integration of spatial data using exact optimization nested in an evolutionary strategy." European Journal of Operational Research 264, no. 3: 1005-1019.
Germany's energy turnaround is leading towards an increasing integration of photovoltaics throughout its distribution grid. As solar power generation fluctuates greatly, distribution system operators are faced with the challenge of preventing grid component overload and voltage range violations. One solution might be to integrate battery storage systems into private households and reduce active peak power at the grid connection point. Since peak shaving is often impossible with the conventional operating strategy of the storage system, solar plants must sometimes be throttled back. In this study, a fuzzy control system is introduced that reduces peak feed-in and thus also energy losses due to throttling back solar power. The system uses solar surplus and battery charge level as input parameters, and standardises them to ensure easy adjustment to different combinations of plant size and storage capacity. Load flows for a complete year were modelled using real-world measurement data, which showed that even small electrical storage capacities (<5 kWh) reduce energy losses considerably and produce only small losses in self-consumption. Thus, there is an economic benefit for plant operators which switch from a conventional to a grid-optimised operating strategy.
Tobias Lühn; Jutta Geldermann. Optimising power grids using batteries and fuzzy control of photovoltaic generation. Proceedings of the Institution of Civil Engineers - Energy 2018, 171, 32 -36.
AMA StyleTobias Lühn, Jutta Geldermann. Optimising power grids using batteries and fuzzy control of photovoltaic generation. Proceedings of the Institution of Civil Engineers - Energy. 2018; 171 (1):32-36.
Chicago/Turabian StyleTobias Lühn; Jutta Geldermann. 2018. "Optimising power grids using batteries and fuzzy control of photovoltaic generation." Proceedings of the Institution of Civil Engineers - Energy 171, no. 1: 32-36.
Matthias Garbs; Jutta Geldermann. Analysis of selected economic and environmental impacts of long distance manure transports to biogas plants. Biomass and Bioenergy 2018, 109, 71 -84.
AMA StyleMatthias Garbs, Jutta Geldermann. Analysis of selected economic and environmental impacts of long distance manure transports to biogas plants. Biomass and Bioenergy. 2018; 109 ():71-84.
Chicago/Turabian StyleMatthias Garbs; Jutta Geldermann. 2018. "Analysis of selected economic and environmental impacts of long distance manure transports to biogas plants." Biomass and Bioenergy 109, no. : 71-84.
Design thinking (DT) has attracted much attention in management practice as a novel problem-solving methodology. It supports and encourages collaborative creativity to solve problems in a holistically and user-centred way. Although there are similarities between DT and multi-criteria decision analysis (MCDA), such as the process orientation and stakeholder participation, there are also differences. Whereas DT mainly focuses on the innovative creation of a prototype, MCDA concentrates instead on the ranking of alternatives. In this paper, we analyse the similarities and differences of DT and MCDA. Based on this analysis, we then develop an approach to integrate elements from DT into MCDA. The stepwise procedure of the adjusted decision process from MCDA is presented in detail. Here, the approach of rapid prototyping from DT is of particular interest. Finally, we discuss the opportunities and challenges of combining multi-criteria decision analysis and design thinking. [Received 8 July 2017; Revised 23 January 2018; Revised 18 April 2018; Accepted 6 May 2018]
Jutta Geldermann; Nils Lerche; Juan David Sepúlveda. Combining multi-criteria decision analysis and design thinking. European J. of Industrial Engineering 2018, 12, 708 .
AMA StyleJutta Geldermann, Nils Lerche, Juan David Sepúlveda. Combining multi-criteria decision analysis and design thinking. European J. of Industrial Engineering. 2018; 12 (5):708.
Chicago/Turabian StyleJutta Geldermann; Nils Lerche; Juan David Sepúlveda. 2018. "Combining multi-criteria decision analysis and design thinking." European J. of Industrial Engineering 12, no. 5: 708.
Cogeneration of heat and electricity is an important pillar of energy and climate policy. To plan the production and distribution system of combined heat and power (CHP) systems for residential heating, suitable methods for decision support are needed. For a comprehensive feasibility analysis, the integration of the location and capacity planning of the power plants, the choice of customers, and the network planning of the heating network into one optimization model are necessary. Thus, we develop an optimization model for electricity generation and heat supply. This mixed integer linear program (MILP) is based on graph theory for network flow problems. We apply the network location model for the optimization of district heating systems in the City of Osorno in Chile, which exhibits the “checkerboard layout” typically found in many South American cities. The network location model can support the strategic planning of investments in renewable energy projects because it permits the analysis of changing energy prices, calculation of break-even prices for heat and electricity, and estimation of greenhouse gas emission savings. Die Kraft-Wärme-Kopplung stellt unabhängig vom eingesetzten Energieträger eine sehr effiziente Möglichkeit zur Bereitstellung von Strom und Wärme dar und kann dazu beitragen, den Primärenergieverbrauch zu reduzieren. Für eine umfassende Machbarkeitsstudie für die Beheizung von Wohngebäuden mittels Nahwärmenetzen werden geeignete Modelle benötigt, um lokale Nahwärmesysteme adäquat abzubilden und simultan zu optimieren. In diesem Beitrag wird daher ein gemischt-ganzzahliges lineares Programm (MILP – mixed integer linear program) zur simultanen Optimierung von Nahwärmenetzen, Kraftwerkskapazitäten und Standorten vorgestellt. Das entwickelte Modell wird exemplarisch für die Planung der Nahwärmeversorgung von Osorno, einer Großstadt in Chile, angewendet. Entscheidungsträger können das Modell dazu nutzen, um die Auswirkungen variierender Eingangsparameter auf die ökonomische Vorteilhaftigkeit einer Investition zu untersuchen, Break-Even-Preise zu ermitteln und Einsparungen an Treibhausgasemissionen abzuschätzen.
Ingo Karschin; Alex G. Berg; Jutta Geldermann. Development of a Network-location-model for the Economic Optimization of Local Heating Systems in Urban Chile. Zeitschrift für Energiewirtschaft 2017, 42, 21 -33.
AMA StyleIngo Karschin, Alex G. Berg, Jutta Geldermann. Development of a Network-location-model for the Economic Optimization of Local Heating Systems in Urban Chile. Zeitschrift für Energiewirtschaft. 2017; 42 (1):21-33.
Chicago/Turabian StyleIngo Karschin; Alex G. Berg; Jutta Geldermann. 2017. "Development of a Network-location-model for the Economic Optimization of Local Heating Systems in Urban Chile." Zeitschrift für Energiewirtschaft 42, no. 1: 21-33.
Valentin Bertsch; Jutta Geldermann; Tobias Lühn. What drives the profitability of household PV investments, self-consumption and self-sufficiency? Applied Energy 2017, 204, 1 -15.
AMA StyleValentin Bertsch, Jutta Geldermann, Tobias Lühn. What drives the profitability of household PV investments, self-consumption and self-sufficiency? Applied Energy. 2017; 204 ():1-15.
Chicago/Turabian StyleValentin Bertsch; Jutta Geldermann; Tobias Lühn. 2017. "What drives the profitability of household PV investments, self-consumption and self-sufficiency?" Applied Energy 204, no. : 1-15.