Simulation-based investigation of a marine dual-fuel engine

Abstract

His research focuses on the development of scientific approaches to holistically capture the safety, energy and sustainability interplay of the complex marine systems including cyber-physical and autonomous systems by employing advanced model-based methods and tools for their design and optimisation pursuing life-cycle risk and energy management, efficiency improvement, and safety and sustainability enhancement. He is a member of the IMarEST Scottish branch committee responsible for the young members early career professionals.

Towards Marine Dual Fuel Engines Digital Twins—Integrated Modelling of Thermodynamic Processes and Control System Functions

“…The first two cases were also presented in the authors' previous study [20], where the validation of the model results is discussed. However, the focus of that study was the safety analysis of the engine systems, whereas this study focuses on analysing the engine response and the engine components interactions as well as identifying the engine operational limitations.…”

“…As reported in [17,18], very few studies have been published focusing on the modelling/simulation or experimental analysis of marine DF engines. The more recent authors' studies [19,20] presented the transient simulation of a large marine DF engine and the derived results were employed for the safety analysis of the engine operations. In addition, to the best of authors' knowledge, other simulation studies on the transient operation of marine DF engines are not available in the open literature.…”

“…The employed models were of the zero-dimensional (0D) type for modelling the engine cylinders processes and the one-dimensional (1D) type for modelling the intake and exhaust manifolds. Theotokatos et al [20] reported the extension of the model presented in [18] and simulated critical situations of the engine operation considering normal and delayed exhaust gas waste gate valve control providing recommendations for enhancing the engine safety. In Mavrelos and Theotokatos [17], a large marine DF two-stroke engine of the premixed combustion type was investigated based on a steady state 0D model developed in the GT-ISE software and the parametric optimisation of the engine settings was performed with the aim of simultaneously reducing the CO 2 and NOx emissions.…”

“…For addressing these gaps, the present study aims at systematically investigating a marine DF four-stroke engine response by developing a detailed model for both the engine and its control system. The developed model is an extension of the versions presented in [18,20] for simulating the engine steady state and transient operation, respectively. The focus of the present study is on the analysis of the engine response and the engine subsystems/components interactions as well as the identification of the engine operational limitations.…”

Safety performance assessment of a marine dual fuel engine by integrating failure mode, effects and criticality analysis with simulation tools

“…The engine simulation tool was validated for a number of steady state operating points (25%, 50%, 75% and 100% loads) as reported in Stoumpos et al, 54 as well as in transient operation scenarios as presented in Stoumpos et al 53 and Theotokatos et al 51 The derived performance and emissions parameters compared with the respective data experimentally obtained from the engine shop tests and the available data published in the pertinent literature. The maximum percentage error identified after the comparison between the measured and the predicted parameters was found below 3.5% and 2.5% for the steady state and the transient operations respectively, thus indicating that the employed simulation tool provides adequate accuracy.…”