Overview
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The LIFETIME project had considered the problem of large marine engine performance degradation and emissions increase over time. This problem is compounded by the fact that a conventional marine engine has optimum matching fixed for a certain operating regime. The target of the project was to develop control systems able to optimise engine performance using the emissions level as an optimisation constraint.
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The objectives of the LIFETIME project were:
- To establish a set of correlations between performance, emissions and engine operating parameters, applicable to a wide variety of direct drive marine engines.
- To develop a control system including the correlations above, able to optimise engine performance based on standard measurable operating and external parameters, with emissions level as an optimisation constraint.
The methodology in the LIFETIME project was:
- To perform a limited series of full scale shipboard tests and testbed experiments of powerplant performance and emissions for large two-stroke marine engines, to compound the partner’s cumulated experience and information repository.
- To conduct a series of detailed simulations of ship powerplant operation under various conditions using comprehensive advanced mathematical models, calibrated using the results of (I), so as to arrive at Objective 1, namely to a set of correlations linking performance, emissions and the engine parameters.
- To use performance and emissions prediction simulation models, in combination with engine control systems design procedures and electronic system test bed trials, so as to arrive at Objective 2, namely to an engine control system including the optimisation correlations of Objective 1.
- To test three (3) prototype LIFETIME systems:
- Onboard a containership with a conventional direct drive slow speed engine.
- Onboard a new built containership with a state-of-the-art ultra large bore engine.
- On an "intelligent" engine.
In this context, during the first project year the first (I) part of the methodology was achieved, while the second (II) one was completed during the second project year. After the Mid-Term period, the third (III) and fourth (IV) part of the methodology commenced and were completed during the third project year. After the completion of 39 months, the LIFETIME Project has accomplished its specified goals and objectives.
Funding
Results
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All work has been completed as planned and the major milestones have been met. The developed control schemes for the electronic engine were extensively evaluated in testbed and three prototype electronic systems were designed and developed: an electronic engine control system (ECS) for the MAN B&W 4T50ME-X engine in MAN B&W testbed (Copenhagen) and two prototype observer systems (an online NOx-BOX prototype with RS-232 communication link to the ship’s monitoring system and an off-line NOx-BOX prototype with manual data entry). The systems were installed on the 4T50ME−X engine and onboard two ships respectively and functionality as well as full-scale tests were successfully performed.
The LIFETIME prototyp
Policy implications
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- The installation of advanced marine engines is promoting EU policies concerned with improvement of working conditions.
- Adjustment of engine emissions according to regional or local legislation and requirements is promoting cost-effective marine operations.
- The development of emissions observer systems may lead to cost-effective real-time evaluation of ship emission legislation conformance.
- Environmental benefits can be directly associated with the reduction in exhaust emissions of marine powerplants through the use of advanced control systems and technologies.
