A novel objective oriented methodology for marine engine–turbocharger matching

Abstract

The matching of the turbocharging system with a marine engine is an essential undertaking due to the turbocharger effects on the engine performance, emissions and response, whilst the limited data availability during the ship design phase renders it challenging. This study aims at developing a novel methodology for the matching of a single turbocharger and multiple turbochargers connected in parallel with marine engines. This methodology employs a compressor parametric modelling tool and a zero-dimensional engine model, whilst taking into account the engine operational profile and the turbocharger components flow limitations. The compressor parametric tool is used for the generation of a database with compressor families that can be investigated during the matching procedure. The model of one engine cylinder block is used for mapping the engine performance parameters at a wide engine operating envelope by developing response surfaces. The developed methodology is implemented for the case study of the turbocharger matching with the propulsion engine of an Aframax tanker. The annual fuel consumption and the engine load diagram upper limit are employed as the main objectives for the selection the turbocharging system. The derived results demonstrate that the effective turbocharger matching results in reducing the engine brake specific fuel consumption up to 5%. The identified turbochargers led to the reduction of the ship annual fuel consumption in the range 1.3%–5.3% compared to the reference engine, whilst providing a more expanded load diagram. This study overcomes the limitations of the manual engine turbocharger–matching process providing decision support on the effective turbocharger matching to satisfy contradictory objectives.

Stationary thermal-gas-dynamics of flows in the cylinder and exhaust system of a piston engine

“…В частности, существуют технические решения по установке теплообменных аппаратов после выпускной системы для полезного использования тепла отработавших газов [26,27]. Более того, данные о теплообмене в выпускной системе необходимы для оценки эффективности системы турбонаддува двигателя [28,29].…”

Health assessment framework of marine engines enabled by digital twins

“…Subsequently the single-cylinder engine model is set up utilising the formulations and equations described in Section Single-Cylinder Thermodynamics Model Description. The turbocharger maps scaling takes place according to the methodology proposed in Mizythras et al 44 The engine manifolds model setup is performed, followed by expanding the formulation of the single-cylinder engine model to the multi-cylinder engine model as described in Section Multi-Cylinder Thermodynamics Model Description.…”

The future of ship engines: Renewable fuels and enabling technologies for decarbonization

“…A compressor parametric modeling tool and a zero-dimensional engine model consider the engine operational profile and turbocharger component flow limitations. 92 The main objectives for selecting the turbocharging system include the annual fuel consumption and the engine load diagram upper limit. Effective matching of the turbocharging system reduces engine BSFC and ship annual fuel consumption by 5% and 1.3%-5.3%, respectively.…”

“…This method overcomes the limitations of the manual engine turbocharger matching processes and provides effective turbocharger matching to satisfy the objectives. 92 The complexities of power management of new marine engines equipped with advanced turbocharging and fuel systems are demonstrated by Altosole et al 93 An example for an advanced dual-fuel engine with a hybrid turbocharger system is shown in Figure 29. An analysis of the behavior of a marine dual-fuel engine was completed for distinct turbocharging configurations and fuel modes.…”