Practical trainings, student assistants and theses

Modelling and Simulation of a Power-to-Gas process with ASPEN (Id 310)

Master theses / Diploma theses

Das Institut für Fluiddynamik des Helmholtz-Zentrums Dresden-Rossendorf (HZDR) beschäftigt sich unter anderem mit Fragen der Modellbildung und Simulation von verfahrenstechnisch eng gekoppelten Power-to-X-Systemen bestehend aus den Teilprozessen Hochtemperaturelektrolyse (Solid Oxide Electrolyzer Cells) und heterogen katalysierten Syntheseprozessen von Energieträgern der Zukunft (Methan, Methanol, usw.) unter stofflicher Nutzung anthropogener Kohlenstoffdioxidemissionen und regenerativ produziertem Strom. Mit Hilfe der Software Aspen Plus soll ein Prozessmodell des Sabatier-Prozesses zur Herstellung von Methan aus CO2 und H2 samt vorgeschalteter Hochtemperaturelektrolyse und aller relevanten peripheren Prozesskomponenten (Wärmetauscher, Kompressoren, Verdampfer, usw.) entwickelt werden.

Zur Realisierung dieser Aufgabe bietet die Abteilung Experimentelle Thermofluiddynamik für Studenten der unten genannten Studiengänge studienbegleitende Tätigkeiten zur beschriebenen Thematik an. Die Voraussetzung ist die Anfertigung einer Diplom- oder Masterarbeit.

Folgende Teilarbeiten sind durchzuführen:

  • Ausführliche Literaturrecherche zu den nachfolgenden Teilaufgaben,
  • Entwicklung eines stationären Prozessmodells einer Hochtemperaturelektrolysezelle samt relevanter Peripherie in Aspen Plus,
  • Entwicklung eines stationären Prozessmodells der Methanisierung von H2 und CO2 (Sabatier-Prozess) samt relevanter Peripherie in Aspen Plus,
  • Kombination beider Teilprozesse unter Berücksichtigung geeigneter Schnittstellen zu weiteren Prozessschritten,
  • Simulation und Validierung beider Teilprozesse und des Gesamtprozesses anhand von Literaturdaten.

Department: Experimental Thermal Fluid Dynamics

Contact: Fogel, Stefan

Requirements

  • Student(in) der Studiengänge Wirtschaftsingenieurwesen, Chemieingenieurwesen, Verfahrenstechnik, Energietechnik, Maschinenbau oder ähnlicher fachlicher Ausrichtung,
  • Idealerweise Erfahrungen/Kenntnisse in verfahrenstechnischer Modellierung in Aspen Plus,
  • Sorgfältige und selbstständige Arbeitsweise,
  • Freude an der wissenschaftlichen Arbeit.

Conditions

Bearbeitungszeit: 6 Monate (Beginn ab sofort möglich)

Online application

Please apply online: english / german

Druckversion


DNS simulation of microlayer formation in the nucleate boiling (Id 306)

Master theses / Diploma theses / Compulsory internship

Nucleate boiling is one of the most efficient heat transfer mode and is widely used in industrial applications, such as nuclear reactor, boiler, electronics cooling system and batteries thermal management. During the boiling process, large amount of heat is removed from the wall due to the presence of intensive phase change. The heat transfer in the nucleate boiling process is strongly dependent on the bubble dynamics, including bubble generation, growth, departure and detachment. In particular, the evaporation from microlayer shows the great potential to enhance the heat transfer performance. However, the experiment comparable simulation of the microlayer profile and the evaporation performance in the nucleate boiling are still not lacking, which significantly restrict our understanding on the nucleate boiling. Based on our previous results, a large part of the reason is that the surface molecular effects are long-standing ignored.

Department: Experimental Thermal Fluid Dynamics

Contact: Zhang, Jinming, Dr. Ding, Wei

Requirements

Experienced in fluid dynamics simulations, e.g., fluent, CFX
Academic studies in the field of fluid mechanics, chemical engineering, mechanical engineering or comparable fields of study.
Knowledge in fluid dynamics, heat and mass transfer phenomena

Online application

Please apply online: english / german

Druckversion


Techno-ökonomische Bewertung eines lastflexiblen Power-to-Methanol Prozesses (Id 300)

Master theses / Diploma theses

Das Institut für Fluiddynamik des Helmholtz-Zentrums Dresden-Rossendorf (HZDR) beschäftigt sich unter anderem mit Fragen der Modellbildung und Simulation von verfahrenstechnisch eng gekoppelten Power-to-X-Systemen bestehend aus den Teilprozessen Hochtemperaturelektrolyse (Solid Oxide Electrolyzer Cells) und heterogen katalysierten Syntheseprozessen von Energieträgern der Zukunft (Methanol, Methan, usw.) unter stofflicher Nutzung anthropogener Kohlenstoffdioxidemissionen und regenerativ produziertem Strom. Auf Basis eines existierenden transienten Systemmodells eines kleinskaligen Power-to-Methanol-Prozesses in der Softwareumgebung Matlab SIMULINK soll ein techno-ökonomisches Teilmodell entwickelt werden, um die Wirtschaftlichkeit der dezentralen Produktion von Methanol unter verschiedenen Marktsituationen zu bewerten.

Zur Realisierung dieser Aufgabe bietet die Abteilung Experimentelle Thermofluiddynamik für Studierende der unten genannten Studiengänge studienbegleitende Tätigkeiten zur beschriebenen Thematik an. Die Voraussetzung ist die Anfertigung einer Diplom- oder Masterarbeit.

Folgende Teilarbeiten sind durchzuführen:

  • Ausführliche Literaturrecherche zu den nachfolgenden Teilaufgaben,
  • Entwicklung eines vereinfachten stationären Teilmodells zur destillativen Trennung des dezentral produzierten Rohmethanols (Bspw. mit Aspen Plus bzw. Matlab SIMULINK) zur Bewertung des zur Trennung notwendigen Energiebedarfs,
  • Entwicklung eines techno-ökonomischen Modells in Matlab SIMULINK zur Bewertung der OPEX/CAPEX des dezentralen Gesamtprozesses und der Ableitung des potentiellen Methanolpreises für den fluktuierenden Betrieb in einem regenerativen Energiesystem.

Department: Experimental Thermal Fluid Dynamics

Contact: Fogel, Stefan

Requirements

  • Student (w/m/d) der Studiengänge Wirtschaftsingenieurwesen, Chemieingenieurwesen, Verfahrenstechnik, Energietechnik, Maschinenbau oder ähnlicher fachlicher Ausrichtung,
  • Idealerweise Erfahrungen/Kenntnisse in verfahrenstechnischer Modellierung und/oder techno-ökonomischer Systembewertung sowie Grundkenntnisse in Matlab und/oder Aspen Plus,
  • Sorgfältige und selbstständige Arbeitsweise,
  • Freude an der wissenschaftlichen Arbeit,
  • Gute Englischkenntnisse.

Conditions

Die Bearbeitungszeit beträgt 6 Monate (Beginn ab sofort möglich)

Online application

Please apply online: english / german

Druckversion


Development of an autonomous underwater flow tracking sensor (Id 293)

Master theses / Diploma theses / Compulsory internship

Foto: flow following sensor particle ©Copyright: Dr. Sebastian ReineckeData acquisition in large industrial vessels such as biogas fermenters or wastewater treatment plants is limited to local measurement points due to limited access to the vessel and the non-transparency of the fluid. To optimize these kinds of vessels, the three-dimensional flow field and the spatial distribution of fluid properties such as temperature and electrical conductivity inside the vessel must be known. This can be achieved by the autonomous flow -following sensor particles developed by the HZDR. Equipped with a pressure sensor, an accelerometer, two gyroscopes and a magnetometer, the sensor particle can track the movement inside the vessels and derive the flow field from that. The sensor particle also feature an actuating buoyancy control unit. For the investigation of smaller vessels a smaller version of the sensor particle is needed. The objective of this master thesis is to hard- and software develop, manufacturing and test of a miniature flow tracking sensor. This includes the following tasks, based on the existing multi-parameter sensor concept:

  • Picking a suitable microcontroller (MC) to perform the data acquisition
  • Design of the schematic and layout of the printed circuit board which includes the above mentioned sensors, a battery with a wireless charging concept, data storage on an SD-card
  • Design the casing
  • Assemble the board and the casing
  • Implementing the data acquisition on the MC
  • Test the sensor particle in a lab scale vessel

Department: Experimental Thermal Fluid Dynamics

Contact: Buntkiel, Lukas

Requirements

  • Studies in electrical engineering, mechatronics, mechanical engineering and similar engineering courses
  • Experience in programming microcontrollers for embedded systems (e.g. STM32)
  • Experience in board design for embedded systems

Links:

Online application

Please apply online: english / german

Druckversion


Contributions to motion tracking of autonomous flow-following sensor particles in industrial process environments (Id 279)

Bachelor theses / Master theses / Diploma theses / Compulsory internship

Foto: AutoSens_StirredReactor ©Copyright: fwdf (Mailgruppe)Data acquisition in large industrial vessels such as biogas fermenters or wastewater treatment plants is limited to local measurement points due to limited access to the vessel and the non-transparency of the fluid. To optimize these kinds of plants, the three-dimensional flow field and the spatial distribution of properties such as temperature and electrical conductivity inside the vessel need to be known. This can be achieved by the autonomous flow-following sensor particles developed by HZDR. Equipped with a pressure sensor, an accelerometer, two gyroscopes and a magnetometer, the sensor particle can track the movement inside the vessels and to infer the flow field from that. The analysis of the data is done after a successful recovery from the vessel. Therefore, algorithms of any complexity can be used to track the motion of the sensor particle.

For the extension and especially for the improvement of the motion tracking we offer the following tasks, from which we can agree on a topic for a thesis or an internship:

  • Development of motion tracking algorithms
  • Characterization and error correction of the sensors
  • Intelligent sampling for the sensors
  • Experimental investigation of the maximal acceleration on a stirrer
  • Development of firmware to cover several data acquisition scenarios
  • Development of an end-user program for the configuration and data analysis of the gathered data

Department: Experimental Thermal Fluid Dynamics

Contact: Buntkiel, Lukas, Dr. Reinecke, Sebastian

Requirements

Studies in the area of electrical, mechatronic, mechanical engineering or similar

  • Basics of measurement uncertainty, digital signal processing
  • Data analysis in Python
  • Independent and structured way of working

Conditions

Start possible at any time
Duration according to the respective study regulations

Links:

Online application

Please apply online: english / german

Druckversion


Nonlinear characterization of horizontal gas-liquid flows (Id 266)

Master theses / Diploma theses / Compulsory internship

Foto: Nonlinear characterization of horizontal gas-liquid flows ©Copyright: Dr. Philipp WiedemannHorizontal gas-liquid flows occur in a variety of processes in energy and process engineering. According to the type of fluids, operating conditions and geometrical aspects different flow patterns are observed. These can be identified successfully by means of online monitoring systems when using appropriate measurement techniques and data processing algorithms.
Within the frame of an internship further investigations will focus on the predictability of the future development of the flow patterns on the basis of currently measured data. For that purpose, methods for characterizing nonlinear systems will be applied to available data and the results will be evaluated.

Department: Experimental Thermal Fluid Dynamics

Contact: Dr. Wiedemann, Philipp

Requirements

  • studies in mathematics/physics/engineering
  • interest in applying sophisticated mathematical methods to engineering problems
  • experiences in signal processing and nonlinear systems as well as using Matlab are beneficial
  • good written and oral communication skills in English and German

Conditions

  • start: immediately
  • working in a multi-disciplinary team
  • remuneration according to HZDR internal regulations

Links:

Online application

Please apply online: english / german

Druckversion