Anders Schou Simonsen, Department of Energy Technology, will defend the thesis "Modelling and Analysis of Seawater Scrubbers for Reducing SOx Emissions from Marine Engines".

TITLE

Modelling and Analysis of Seawater Scrubbers for Reducing SOx Emissions from Marine Engines

PHD DEFENDANT

Anders Schou Simonsen

SUPERVISOR

Associate Professor Kim Sørensen

MODERATOR

Associate Professor Samuel Simon Ariya 

OPPONENTS

Associate Professor Samuel Simon Araya, Dept. of Energy Technology, Aalborg University (Chairman)
Professor Dr.-Ing. Milovan Perić, Founder and general manager of CoMeT Continuum Mechanics
Technologies, Germany
Professor Dr. Hans Kuerten, Eindhoven University, The Netherlands

ABSTRACT

The aim of this thesis is to develop an accurate computational model of a seawater scrubber for reducing SOx emissions from marine engines. The motivation for developing this model is to optimize the scrubber design to be more energy efficient and to investigate the phenomena governing seawater scrubbers.

The proposed model takes both the continuous phase, the liquid phase, and the liquid wall films flowing down the scrubber shell into account. The chemistry governing SOx absorption in seawater is modelled as well, where 17 species are considered in the liquid phase. MATLAB and OpenFOAM are used to resolve the liquid and continuous phases respectively, where the two software packages exchange information during simulation in order to couple the phases. This multi-disciplinary model combines numerous sub-models, where several model parameters are unknown. Therefore, the model was tuned to match results from experimental tests, which were carried out at the Alfa Laval Test & Training Centre.

The tuned scrubber model was capable of predicting the outlet temperature, sulfur concentration, and overall pressure loss with an average accuracy of plus/minus 1.8 K, 10.1 ppm (v/v), and 57.5 Pa respectively. The accuracies fluctuated for each test carried out, where the RMS-errors were 3.1 K, 20.4 ppm (v/v), and 77.3 Pa, which corresponds to relative deviations compared to the experimental tests of approximately 11.5 %. This Ph.D. project has contributed to a better understanding of seawater scrubbers and the modelling of these, which allows for developing more efficient scrubbers, which will reduce energy requirements.

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PhD defence by Anders Schou Simonsen on Modelling and Analysis of Seawater Scrubbers for Reducing SOx Emissions from Marine Engines

ALL ARE WELCOME. THE DEFENCE WILL BE IN ENGLISH.

AFTER THE DEFENCE THERE WILL BE AN INFORMAL RECEPTION AT PONTOPPIDANSTRAEDE 111 IN ThE COFFEE ROOM.