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Almeida Benalcazar, E.F. (author), Noorman, H.J. (author), Maciel Filho, Rubens (author), Posada Duque, J.A. (author)This study explores key success factors for ethanol production via fermentation of gas streams, by assessing the effects of eight process variables driving the fermentation performance on the production costs and greenhouse gas emissions. Three fermentation feedstocks are assessed: off-gases from the steel industry, lignocellulosic biomass...journal article 2022
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Santanoceto, M. (author), Tiberga, M. (author), Perko, Z. (author), Dulla, Sandra (author), Lathouwers, D. (author)In this work, we present the results of a preliminary uncertainty quantification and sensitivity analysis study of the Molten Salt Fast Reactor (MSFR) behavior at steady-state performed by applying a non-intrusive Polynomial Chaos Expansion (PCE) approach. An in-house high-fidelity multi-physics simulation tool is used as reactor reference...journal article 2021
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van Beek, Maarten T. (author), Viré, A.C. (author), Andersen, Søren J. (author)Wind farms experience significant efficiency losses due to the aerodynamic interaction between turbines. A possible control technique to minimize these losses is yaw-based wake steering. This paper investigates the potential for improved performance of the Lillgrund wind farm through a detailed calibration of a low-fidelity engineering model...journal article 2021
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de Bruijn, E.A. (author), Bloemendal, Martin (author), ter Borgh, M.M. (author), Godderij, R.R.G.G. (author), Vossepoel, F.C. (author)Geothermal operations are expanding and increasingly contributing to the current energy supply. Assessing the long-term operable lifetime of these projects is complicated as the reservoirs they produce from are often deep and subsurface properties are uncertain and spatially variable. The minimum lifetime of a geothermal project usually...journal article 2021
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Wang, Y. (author), Voskov, D.V. (author), Khait, M. (author), Saeid, S. (author), Bruhn, D.F. (author)A realistic deep low-enthalpy geothermal reservoir based on real data with high detail and complicated sedimentary structure is utilized to perform sensitivity analyses of the geological features influencing reservoir properties. We perform simulations using the Delft Advanced Research Terra Simulator (DARTS). Compelling numerical performance...journal article 2021
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Alsayyari, F.S. (author)Large-scale complex systems require high-fidelity models to capture the dynamics of the system accurately. For example, models of nuclear reactors capture multiphysics interactions (e.g., radiation transport, thermodynamics, heat transfer, and fluid mechanics) occurring at various scales of time (prompt neutrons to burn-up calculations) and...doctoral thesis 2020
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Cho, Yubin (author), Huang, Yilin (author), Verbraeck, A. (author)Dynamic data-driven simulation (DDDS) incorporates real-time measurement data to improve simulation models during model run-time. Data assimilation (DA) methods aim to best approximate model states with imperfect measurements, where particle Filters (PFs) are commonly used with discrete-event simulations. In this paper, we study three critical...conference paper 2020
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Consorti Bussamra, B. (author), Sietaram, D.L. (author), Verheijen, Peter J.T. (author), Mussatto, Solange (author), Carvalho da Costa, Aline (author), van der Wielen, L.A.M. (author), Ottens, M. (author)This article provides an analysis on published models used to calculate phase separation in aqueous two-phase systems (ATPS) based on Flory-Huggins (FH) theory, in terms of problem formulation and mathematical solving algorithm. An integrated algorithm is presented, showing different mathematical approaches of using the FH theory. The algorithm...journal article 2020
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Santanoceto, M. (author), Tiberga, M. (author), Perko, Z. (author), Dulla, Sandra (author), Lathouwers, D. (author)Uncertainty Quantification (UQ) of numerical simulations is highly relevant in the study and design of complex systems. Among the various approaches available, Polynomial Chaos Expansion (PCE) analysis has recently attracted great interest. It belongs to non-intrusive spectral projection methods and consists of constructing system responses...conference paper 2020
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Arat, K.T. (author), Hagen, C.W. (author)The sensitivity of simulated scanning electron microscopy (SEM) images to the various physical model ingredients is studied using an accurate, but slow simulator, to identify the most important ingredients to include in a reliable and fast SEM image simulator. The quantum mechanical transmission probability (QT) model and the electron...journal article 2020
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Raimbault, Juste (author), Broere, Joris (author), Somveille, Marius (author), Serna, Jesus Mario (author), Strombom, Evelyn (author), Moore, Christine (author), Zhu, B. (author), Sugar, Lorraine (author)Industrial symbiosis involves creating integrated cycles of by-products and waste between networks of industrial actors in order to maximize economic value, while at the same time minimizing environmental strain. In such a network, the global environmental strain is no longer equal to the sum of the environmental strain of the individual...journal article 2020
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Seo, Jeongwon (author), Abdel-Khalik, Hany (author), Perko, Z. (author)This paper presents an algorithm for completing sensitivity analysis that respects linear constraints placed on the associated model’s input parameters. Any sensitivity analysis (linear or nonlinear, local or global) focuses on measuring the impact of input parameter variations on model responses of interest, which may require the analyst to...journal article 2020
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Cicirello, A. (author), Mace, Brian (author), Kingan, Michael (author), Yang, Yi (author)The first and second order sensitivity analysis of the eigenvalue problem of generalised, nonsymmetric matrices using perturbation theory is developed. These results are then applied to sensitivity analysis of wave propagation in structures modelled using the wave and finite element (WFE) method. Three formulations of the WFE eigenvalue problem...journal article 2020
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Kroon, J. (author), de Schipper, M.A. (author), van Gelder, P.H.A.J.M. (author), Aarninkhof, S.G.J. (author)Sand nourishments are increasingly applied as adaptive coastal protection measures. Predictions of the evolution of these nourishments and their impact on the surrounding coastline contain many uncertainties. The sources that add to this uncertainty can be delineated between intrinsic and epistemic uncertainty, i.e. inevitably in the system or...journal article 2020
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Alsayyari, F.S. (author), Tiberga, M. (author), Perko, Z. (author), Lathouwers, D. (author), Kloosterman, J.L. (author)We use a novel nonintrusive adaptive Reduced Order Modeling method to build a reduced model for a molten salt reactor system. Our approach is based on Proper Orthogonal Decomposition combined with locally adaptive sparse grids. Our reduced model captures the effect of 27 model parameters on k<sub>eff</sub> of the system and the spatial...journal article 2020
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Enhancement of Transient Stability in Power Systems with High Penetration Level of Wind Power PlantsWang, D. (author), Rueda, José L. (author), Perilla Guerra, A.D. (author), Rakhshani, E. (author), Palensky, P. (author), van der Meijden, M. (author)Due to the power electronic converter based interface and maximum power control strategy, wind generators cannot directly respond to power system transients. This brings new challenges on power system transient stability. Taking wind turbine type 4 (WT4) as one example, this paper analyses its influence on transient stability with respect to...conference paper 2019
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Tene, M. (author), Stuparu, Dana E. (author), Kurowicka, D. (author), El Serafy, G.Y.H. (author)This paper describes a novel sensitivity analysis method, able to handle dependency relationships between model parameters. The starting point is the popular Morris (1991) algorithm, which was initially devised under the assumption of parameter independence. This important limitation is tackled by allowing the user to incorporate dependency...journal article 2018
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Vonach, Tanja (author), Tscheikner-Gratl, F. (author), Rauch, Wolfgang (author), Kleidorfer, Manfred (author)Although calibration of a hydrodynamic model depends on the availability of measurement data representing the system behavior, advice for the planning of necessary measurement campaigns for model calibration is scarce. This work tries to address this question of efficient measurement site selection on a network scale for the objective of...journal article 2018
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Koppenol, D.C. (author)Dermal wounds are a significant global problem; although the treatment of these wounds has improved considerably over the last few decades, a treatment still does not result in a complete regeneration of the injured tissue. Instead, the final outcome of the healing process is scar tissue. The material properties of scar tissue are different from...doctoral thesis 2017
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Di Matteo, Umberto (author), Nastasi, B. (author), Albo, Angelo (author), Astiaso Garcia, Davide (author)Urban waste management is one of the most challenging issues in energy planning of medium and large cities. In addition to the traditional landfill method, many studies are investigating energy harvesting from waste, not as a panacea but as a foreseeable solution. Thermo-chemical conversion to biogas, or even bio-methane under certain...journal article 2017