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

Abstract

Marine Dual Fuel engines have been proved an attractive solution to improve the shipping industry sustainability and environmental footprint. Compared to the conventional diesel engines, the use of additional components to accommodate the natural gas feeding is associated with several safety implications. To ensure the engine safe operation, appropriate engine control and safety systems are of vital importance, whilst potential safety implications due to sensors and actuators faults or failures must be considered. This study aims at investigating the safety issues of a marine dual fuel (DF) engine considering critical operating scenarios, which are identified by employing a Failure Mode, Effects and Criticality Analysis. An existing verified digital twin (DT) of the investigated DF engine, capable of predicting the engine response at steady state and transient conditions with sufficient accuracy is employed to simulate the engine operation for the identified scenarios. The simulated scenarios results analysis is used to support the risk priority number assessment and identify the potential safety implications by considering the manufacturer alarm limits. Appropriate measures are recommended for the investigated DF engine safety performance improvement. This study demonstrates a methodology integrating existing safety methods with state-of-the-art simulation tools for facilitating and enhancing the safety assessment process of marine DF engines considering both steady state conditions and transient operation with main focus on switching operating modes.

Engine Fault Diagnosis Based on Virtual Instrument Technology

“…(2) Text-based programming languages, such as VC, VB, and C. In this paper, LabVIEW was chosen to develop and design an electronically controlled motor waveform analysis software platform and fault diagnosis system. labView has powerful network communication capabilities, allowing users to develop powerful LabViews applications and powerful remote control capabilities for network communication [12][13]. The network can be measured and managed using (1) a remote desktop with Windows, (2) data exchange using 'dalasocket' technology, (3) communication using network protocols, and (4) the most direct way of propagating NI over long distances.…”

Composite anti-disturbance control for ship dynamic positioning systems with thruster faults

“…15 Thruster faults will appear inevitably when ships sailing on the sea for a long time, which will degrade system performance, reduce the DP accuracy, and even make the DP system unstable, thus, it is essential to study the fault diagnosis of ships to improve the reliability of the DP systems. [16][17][18] Under the condition of the fault type and upper bound are known, the dynamic positioning was realized for ships with disturbances. 19 In Su et al, 20 the asymptotic stability of DP ships with actuator constraints was addressed, whereas the external environmental disturbances is not considered.…”