FG Energietechnik und Umweltschutz

9 Items

Recent Submissions
Exergetische Untersuchung einer Carbon Black Anlage

Mergenthaler, Pieter (2019)

In der vorliegenden Arbeit werden exergiebasierte Methoden angewandt, um eine Carbon Black Anlage auf Grundlage verschiedener Bewertungskriterien zu untersuchen. Dabei werden Material- und Energieströme exergetisch, exergoökonomisch und exergoökologisch bewertet. Für die Anwendung der exergoökonomischen Analyse wird die Methodik der konventionellen Kostenanalyse erweitert, sodass neben der Kost...

Evaluation and optimization of natural gas liquefaction process with exergy-based methods: a case study for C3MR

Primabudi, Eko (2019)

Propane pre-cooled mixed refrigerant process, known as C3MR, is the leading technology in the LNG market based on the capacity installed. In this study, exergy-based methods were implemented in order to obtain optimal operation conditions. The C3MR process is modeled with 4.5 MTPA production capacity using Aspen Plus process simulator, which is connected to the exergy and exergoeconomic analysi...

Thermische Speicher zur Optimierung des Betriebs von Heizkraftwerken in der Fernwärmeversorgung

Christidis, Andreas Christos (2019)

Der Energieversorgungssektor wird seit Anfang des Jahrtausends immer stärker von den gesellschaftspolitischen Zielen geprägt, den fossilen Primärenergieeinsatz und damit die anthropogenen Treibhausgasemissionen zu reduzieren. Wesentliche Maßnahmen um diese Ziele zu erreichen sind neben Einsparungen im Endenergieverbrauch, die Effizienzsteigerung der Energieumwandlung und die Erhöhung des Anteil...

Exergy-based analysis of aircraft environmental control systems and its integration into model-based design

Bender, Daniel (2019)

Aircraft environmental control systems are complex energy intensive systems and the most important non-propellant consumer of energy among all aircraft systems. The intense pressure on airlines to remain competitive on the global market demands more efficient aircraft greater than ever. Meaningful analysis methods for the evaluation of architectural designs and effective modeling and simulation...

Comparative evaluation of methanol production processes using natural gas

Blumberg, Timo Dominik (2018)

In the work, different processes for the production of methanol from natural gas are analysed from a thermodynamic and an economic point of view. Commercially available processes and promising future alternatives for increased thermodynamic efficiency, improved economics and reduced greenhouse gas emissions are assessed and compared. The analysed processes are based on the indirect synthesis ro...

Evaluation of an energy- and exergy-based generic modeling approach of combined heat and power plants

Mollenhauer, Eike ; Christidis, Andreas ; Tsatsaronis, George (2016-02-29)

Reduced models of combined heat and power plants are required for different applications. Among other usages, they are implemented as mixed integer linear programs (MILP) in energy market models or price-based unit commitment problems to study the economic feasibility and optimal operation strategies of different units. Generic models are particularly useful when limited information is availabl...

Advanced exergoeconomic analysis of a power plant with CO2 capture

Petrakopoulou, Fontina ; Tsatsaronis, George ; Morosuka, Tatiana (2015)

Conventional exergy-based analyses reveal options for improving energy conversion systems, but they suffer from some limitations that are addressed by advanced exergy-based analyses. Advanced exergy-based methods are capable of (1) identifying interdependencies among plant components (endogenous / exogenous values), and (2) revealing the potential for improvement (avoidable / unavoidable values...

Transient lattice contraction in the solid-to-plasma transition

Ferguson, K. R. ; Bucher, M. ; Gorkhover, Tais ; Boutet, S. ; Fukuzawa, H. ; Koglin, J. E. ; Kumagai, Y. ; Lutman, A. ; Marinelli, A. ; Messerschmidt, M. ; Nagaya, K. ; Turner, J. ; Ueda, K. ; Williams, G. J. ; Bucksbaum, P. H. ; Bostedt, C. (2016)

In condensed matter systems, strong optical excitations can induce phonon-driven processes that alter their mechanical properties. We report on a new phenomenon where a massive electronic excitation induces a collective change in the bond character that leads to transient lattice contraction. Single large van der Waals clusters were isochorically heated to a nanoplasma state with an intense 10-...

Against the Odds: The Potential of Swarm Electrification for Small Island Development States

Koepke, Mathias ; Groh, Sebastian (2016)

The paper builds on earlier observations using system complexity theory to explain the characteristics of a swarm electrification approach using existing small, distributed renewable energy generation infrastructure integrated into a grid. The concept is based on swarm intelligence where information and electricity flow between neighbors to achieve a compounding network effect, in that they are...