2,916 Works

CURRICULUM INTEGRATION: TWINNING OF A CORE CHEMICAL ENGINEERING MODULE WITH A TEAMWORK & COMMUNICATION MODULE

Jessy J.C. Yau & Sin-Moh Cheah

CO2 Capture Technologies to Combat Climate Change

Bjørn Maribo-Mogensen, Anker Jensen & Georgios Kontogeorgis
The majority of scientists, politicians, and organizations agree that climate change is one of the biggest challenges for the 21st century. Reducing the CO2 emissions requires immense efforts in many areas. To combat climate change Carbon Capture and Storage (CCS), where CO2 is captured from the flue gas of power plants and then stored in geological structures must be applied on a massive scale. The poster summarizes the investigations done by the author since primo...

Large scale modeling of seawater intrusion in a coastal aquifer: application to the North Sharon and Heffer Valley areas, Israel.

Jacob Bensabat, Jacob Bear, Zhou Quanlin & Jacob Bensabat
Seawater intrusion, in the form of a wide transition zone from fresh water to seawater, is a well-known phenomenon occurring in most coastal aquifers, as a result of unbalanced freshwater extraction practices. The prediction of seawater intrusion resulting from planned water extraction scenarios is of crucial importance as it allows maximization of freshwater sustainable extraction, while preserving the coastal aquifer's viability by minimizing adverse salinization processes. Seawater intrusion can be monitored by observation wells. However,...

Economics of biodiesel production

Camilla Christiansen, Anne Skov Ladegaard, Mathias Nordblad & John Woodley
EU has determined that 10 % of all fuel used in 2020 should be replaced by a biofuel. That substitute could be biodiesel. This project deals with the possibility of replacing 10 % of the used fuel in Denmark by biodiesel. Furthermore a comparison of the economic evaluation of two different plants was done. The crucial difference between the plants was purchase of the catalyst, enzymatic or chemical, with a difference of 17.3 mil. kr....

Economics of biodiesel production

Camilla Christiansen, Anne Skov Ladegaard, Mathias Nordblad & John Woodley
EU has determined that 10 % of all fuel used in 2020 should be replaced by a biofuel. That substitute could be biodiesel. This project deals with the possibility of replacing 10 % of the used fuel in Denmark by biodiesel. Furthermore a comparison of the economic evaluation of two different plants was done. The crucial difference between the plants was purchase of the catalyst, enzymatic or chemical, with a difference of 17.3 mil. kr....

Hydraulic Parameter Estimation in Heterogeneous Porous Media

Olaf Ippisch, Peter Bastian, Anatja Samouëlian, Hans-Jörg Vogel & Olaf Ippisch
The determination of hydraulic parameter functions is crucial for the modeling of multiphase flow in porous media. The combination of multistep-outflow experiments and inverse modeling is a standard method for the determination of hydraulic properties for unsaturated flow. Up to now it is necessary to assume, that the sample is homogeneous, which is not true for most natural porous media. Measurement techniques like x-ray tomography, geoelectrics and georadar allow the non-destructive determination of the spatial...

Application of Ant Algorithm in Calibration of Rainfall-Runoff Model

Mortazavi Naeini Seyed Mohammad, Alireza B.Dariane & Mortazavi Naeini Seyed Mohammad
The successful application of a conceptual rainfall-runoff (CRR) model depends on how it is calibrated. The CRR models generally represent the soil moisture accounting phase of the hydrologic cycle as several interconnected subsystems, each representing a certain component in the processing of the hydrologic event. Despite the popularity of CRR models, reports in the literature indicate that difficulties in calibrating the parameters. Ant Colony Optimization (ACO) is one of the recent optimization methods which is...

Hydraulic Parameter Estimation in Heterogeneous Porous Media

Olaf Ippisch, Peter Bastian, Anatja Samouëlian, Hans-Jörg Vogel & Olaf Ippisch
The determination of hydraulic parameter functions is crucial for the modeling of multiphase flow in porous media. The combination of multistep-outflow experiments and inverse modeling is a standard method for the determination of hydraulic properties for unsaturated flow. Up to now it is necessary to assume, that the sample is homogeneous, which is not true for most natural porous media. Measurement techniques like x-ray tomography, geoelectrics and georadar allow the non-destructive determination of the spatial...

Reengineering of Tietgenkollegiet

Hassan Valid Chaachouh, Stine Holst Pedersen, Zahra Alilou & Christian Anker Hvid
Integrated functional design project containing reengineering of Tietgenkollegiet. The purpose is to meet the requirements of low energy class 1, and a satisfying inddor air climate and level of daylight.

ESTIMATING SURFACE FLUXES IN IRRIGATED AREAS WITH SCINTILLOMETERS

Oscar Hartogensis, Henk De Bruin & Oscar Hartogensis
Scintillometry has proven to be a good alternative method to obtain surface fluxes over heterogeneous areas over spatial scales of up to 10 km and in non-stationary conditions in the stable surface layer (see e.g. [1]). This study concerns agro- hydrological scintillometer applications of estimating evaporation over homogeneous irrigated areas on a scale of 50 to 500 m. Two types of scintillometers will be considered, notably the displaced beam small aperture scintillometer (DBSAS) and the...

Reengineering of Tietgenkollegiet

Hassan Valid Chaachouh, Stine Holst Pedersen, Zahra Alilou & Christian Anker Hvid
Integrated functional design project containing reengineering of Tietgenkollegiet. The purpose is to meet the requirements of low energy class 1, and a satisfying inddor air climate and level of daylight.

Nonlinear multilevel iterative methods for multiscale models of air/water flow in porous media

Chris Kees, Matthew Farthing, Lea Jenkins, C. T. Kelley, Stacy Howington & Chris Kees
Richards' equation and the two-phase flow equations are well-known degenerate parabolic models of air/water flow in porous media. Poor iterative solver performance and small time steps during transient simulations are often reported in field-scale simulations. In this work we study Newton-multigrid and nonlinear multigrid methods applied to discrete air/water flow models. The models are discretized using standard continuous finite element spaces. Due to strong nonlinearity and potential degeneracy in the coefficients, we stabilize the models...

Nonlinear multilevel iterative methods for multiscale models of air/water flow in porous media

Chris Kees, Matthew Farthing, Lea Jenkins, C. T. Kelley, Stacy Howington & Chris Kees
Richards' equation and the two-phase flow equations are well-known degenerate parabolic models of air/water flow in porous media. Poor iterative solver performance and small time steps during transient simulations are often reported in field-scale simulations. In this work we study Newton-multigrid and nonlinear multigrid methods applied to discrete air/water flow models. The models are discretized using standard continuous finite element spaces. Due to strong nonlinearity and potential degeneracy in the coefficients, we stabilize the models...

ESTIMATING SURFACE FLUXES IN IRRIGATED AREAS WITH SCINTILLOMETERS

Oscar Hartogensis, Henk De Bruin & Oscar Hartogensis
Scintillometry has proven to be a good alternative method to obtain surface fluxes over heterogeneous areas over spatial scales of up to 10 km and in non-stationary conditions in the stable surface layer (see e.g. [1]). This study concerns agro- hydrological scintillometer applications of estimating evaporation over homogeneous irrigated areas on a scale of 50 to 500 m. Two types of scintillometers will be considered, notably the displaced beam small aperture scintillometer (DBSAS) and the...

Reengineering of Tietgen Kollegiet into a green building

Daniel Løvborg, Jakob Trier Holck, Jannie Bakkær Sørensen, Stig Birkemose & Christian Anker Hviid
Reengineering of Tietgen Kollegiet into a green building in terms of energy consumption and indoor climate.

Introducing Chip Design using Speed of Light

Stefan Schlotterbeck-Macht, Konrad Doll & Ulrich Brunsmann
We present a novel didactical concept for undergraduate teaching of microelectronics based on an experiment using a CMOS cyclic pulse-shrinking time-to-digital-converter (TDC) in order to directly measure the speed of light. The experimental setup, the didactical concept of teaching the TDC operating principle, an example realization of a TDC for didactical purposes and an actual research application are described. Our concept fits into the CDIO framework with emphasis on design-build experience and on project-based learning...

Introducing Chip Design using Speed of Light

Stefan Schlotterbeck-Macht, Konrad Doll & Ulrich Brunsmann
We present a novel didactical concept for undergraduate teaching of microelectronics based on an experiment using a CMOS cyclic pulse-shrinking time-to-digital-converter (TDC) in order to directly measure the speed of light. The experimental setup, the didactical concept of teaching the TDC operating principle, an example realization of a TDC for didactical purposes and an actual research application are described. Our concept fits into the CDIO framework with emphasis on design-build experience and on project-based learning...

Environmental Management in event planning - a Life Cycle approach, the Roskilde Festival case

Alexandra Bonou & Stig Irving Olsen
This LCA-based study estimates the environmental impacts of the activities happening on the Roskilde Festival’s site during its 8 day length. The purpose is to prioritize policies and mitigation actions. The system boundaries include: audience transportation; accommodation, food and water consumption; electricity and fuel consumption; waste management. The impact assessment was carried out according to the EDIP method. The results revealed that main contributors to all impact categories are the transportation of festival goers and...

An Evaluation of Active Learning Strategies Applied to Engineering Mathematics

Charles McCartan, Tony McNally & Paul Hermon
This paper describes a specific engineering mathematics module which has been developed and implemented to promote deeper learning using the CDIO methodology. It conforms to several CDIO Standards and also seeks to develop personal, interpersonal and professional skills through an extensive active and interactive learning paradigm. The content, pedagogy, efficacy and evaluation of the module in relation to student attainment, engagement and enjoyment over a three year period since it was first implemented are discussed....

Reengineering of Tietgen Kollegiet into a green building

Daniel Løvborg, Jakob Trier Holck, Jannie Bakkær Sørensen, Stig Birkemose & Christian Anker Hviid
Reengineering of Tietgen Kollegiet into a green building in terms of energy consumption and indoor climate.

Automatic calibration of a 3D groundwater model applied to the Muravera-Flumendosa coastal aquifer (SE Sardinia, Italy)

Giuditta Lecca, Pierluigi Cau, Federica Ardau & Giuditta Lecca
The performance evaluation of a groundwater model is a complex task due to the wide heterogeneity of hydrogeological properties, the scarcity of appropriate field data and the variability of boundary conditions. In this study an automatic calibration procedure has been developed and applied to the 3D groundwater model of the Muravera- Flumendosa coastal basin. The aquifer is threatened by seawater intrusion due to groundwater overexploitation and reduced replenishment. Aim of the study is to improve...

An Evaluation of Active Learning Strategies Applied to Engineering Mathematics

Charles McCartan, Tony McNally & Paul Hermon
This paper describes a specific engineering mathematics module which has been developed and implemented to promote deeper learning using the CDIO methodology. It conforms to several CDIO Standards and also seeks to develop personal, interpersonal and professional skills through an extensive active and interactive learning paradigm. The content, pedagogy, efficacy and evaluation of the module in relation to student attainment, engagement and enjoyment over a three year period since it was first implemented are discussed....

Environmental Management in event planning - a Life Cycle approach, the Roskilde Festival case

Alexandra Bonou & Stig Irving Olsen
This LCA-based study estimates the environmental impacts of the activities happening on the Roskilde Festival’s site during its 8 day length. The purpose is to prioritize policies and mitigation actions. The system boundaries include: audience transportation; accommodation, food and water consumption; electricity and fuel consumption; waste management. The impact assessment was carried out according to the EDIP method. The results revealed that main contributors to all impact categories are the transportation of festival goers and...

Automatic calibration of a 3D groundwater model applied to the Muravera-Flumendosa coastal aquifer (SE Sardinia, Italy)

Giuditta Lecca, Pierluigi Cau, Federica Ardau & Giuditta Lecca
The performance evaluation of a groundwater model is a complex task due to the wide heterogeneity of hydrogeological properties, the scarcity of appropriate field data and the variability of boundary conditions. In this study an automatic calibration procedure has been developed and applied to the 3D groundwater model of the Muravera- Flumendosa coastal basin. The aquifer is threatened by seawater intrusion due to groundwater overexploitation and reduced replenishment. Aim of the study is to improve...

Professional Practice and Design: Key Components in Curriculum Design

Jane Goodyer
A review of a curriculum redesign for a Bachelor of Engineering Honours programme. Large emphasis on how professional practice and solving complex engineering problems through group project work is integrated throughout all four years of the degree. In fact 25% of the degree is dedicated to this. The approach taken for all eight projects' context and the teaching and learning strategies are discussed.

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