Numerical Optimization of SPR Sensors for Lube Oil Real-Time Optical Characterization in Large 2-Stroke Marine Diesel Engines

Milanese, Marco; Knauer, Matthias; Colangelo, Gianpiero; Laforgia, Domenico; Risi, Arturo de

doi:10.1016/j.egypro.2017.08.238

Cited by 5 publications

(4 citation statements)

References 18 publications

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“…The model was shown to have good reliability and the ability to be used to predict the effect of various factors on the performance and pollutant emissions of an electrically controlled Diesel marine engine. Milanese et al [19] studied the creation of a sensor that can measure real-time elements and precisely adjust the supply of the required amount of lubricant. In this way, we can achieve significant savings in the consumption of lubricants.…”

Section: Performance Optimization Studiesmentioning

confidence: 99%

Assessing the Sustainability of the Most Prominent Type of Marine Diesel Engines under the Implementation of the EEXI and CII Regulations

Polemis,

Boviatsis,

Chatzinikolaou

2023

Clean Technol.

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The wide spread of the Diesel engine has been instrumental in the development of modern shipping. Marine Diesel engines dominate today as an option for the propulsion of commercial ships. While replacing Diesel engines with alternative propulsion engines is difficult to achieve, companies, in light of the new EEXI regulations, are turning to improvements, such as operating at lower rotational speeds, higher maximum combustion pressures, and more efficient overcrowding systems. Τhe purpose of this research paper is (i) to present the basic operating principles of marine Diesel engines, (ii) to study the main differences between electronically controlled Diesel engines and their mechanically controlled counterparts, and (iii) to evaluate their performance under newly introduced IMO’s EEXI regulations. Thus, after comparing Wärtsilä RTA and WinGD WX, the paper concluded that WinGD WX, being electronically controlled, will perform more effectively under new EEXI regulations, as it offers (i) reduced fuel consumption in low-load mode, (ii) zero-smoke emission at all operating speeds, (iii) very stable operation at low speed, (iv) more straightforward engine setup leading to less maintenance, (v) more extended periods between maintenance, mainly due to better load distribution between cylinders and more perfect combustion. From a regulatory perspective, the new limitations installed by the newly implemented EEXI and CII regulations will cause fewer implications in electronically controlled engines, while from an economic standpoint, the electronically controlled engines decrease OPEX and require fewer personnel, due to their efficiency at low loads and overall flexibility.

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Section: Performance Optimization Studiesmentioning

confidence: 99%

Assessing the Sustainability of the Most Prominent Type of Marine Diesel Engines under the Implementation of the EEXI and CII Regulations

Polemis,

Boviatsis,

Chatzinikolaou

2023

Clean Technol.

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“…Lubricants for large two-stroke diesel engines are blended to comply with a variety of functions, one of them being the neutralization of acidic products from combustion: mainly Sulfur related species combustion products attack the cylinder liner and lead to corrosive wear. 4,5 In order to optimize engine lubrication systems, several scientific works have been carried out to: improve lubricant performance, [6][7][8][9][10][11][12][13] control environmental emissions related to lube oil, [14][15][16][17][18][19][20][21] reduce engine friction losses, 12,22,23 monitor lubricating condition between piston ring and cylinder liner 24 and properly dose the amount of lubricant within engine. 11,25,26 The aim of the present work is focused on this latter topic.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Development of common rail lube oil injector for large two-stroke marine diesel engines

Milanese

Iacobazzi

Stark

et al. 2021

International Journal of Engine Research

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The two-stroke crosshead diesel engines, nowadays moving the majority of merchant vessels, have lubrication systems which significantly contribute to their overall emissions, since they work on total loss basis: a relevant fraction of lubricant enters the exhaust duct, increasing total exhaust emissions. This paper demonstrates that a viable solution to reduce lubrication system related emissions can be found in the application of a new common rail type ( CR) lubrication system. Particularly, in the first part of this study, a common rail injector was simulated and numerically optimized by means of AMESim. The main parameters influencing lube oil injected mass were identified, with the purpose to design a highly time responsive injector. Therefore, a CR injector was realized and experimentally characterized by means of a dedicated test cell, defining the lube oil injection map over the entire engine load range. Finally, full scale engine tests allowed to evaluate oil loss at exhaust, proposing, and applying the Sulfur tracing methodology. A comparison with a pulse jet lubrication system demonstrated a relevant reduction in oil loss: 100% engine load testes demonstrated decreases ranging from 56.2% to 63.3%, while once fixed the lube oil feed rate to 0.8 g/kWh a maximum reduction in oil loss equal to 66.7% was reached. These results allow nominating the common rail lubrication system as a feasible solution to significantly reduce oil loss at exhaust of large two-stroke marine diesel engines.

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“…There have been many studies to find the vibration characteristics of diesel engines (1,(7)(8)(9)(10)(11)(12) and on how to reduce vibration with various vibration isolation systems. (13)(14)(15)(16) However, there has been little research on how to precisely locate vibration isolators. To find the best locations of isolators, the effect of the center of mass (CM) of a diesel engine needs to be understood and assessed, which has not yet been reported.…”

Section: Introductionmentioning

confidence: 99%

Effect of Center of Mass on Vibration-sensing Technology for Diesel Engine

Liao¹,

Yu²,

Song³

et al. 2021

Sensors and Materials

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Different centers of mass (CMs) of a diesel engine were set to find their effects on the vertical vibration of an engine. To understand the effects and reduce vibration during sensing, we changed the location of the CM of the engine and performed a simulation to obtain data such as the vertical movements, velocity, torque, and acceleration of the vertical springs of isolators. The data showed that a 0.1 mm higher CM than the original CM of the engine reduced the amplitude of the vertical vibration by 4.35% and the velocity of the vertical vibration by 45.7% at a fixed rotation speed of the engine of 1000 revolutions per minute (rpm). Different CMs did not significantly affect the torque and acceleration. Instead, the phase of the vertical movements, the velocity, and the acceleration significantly changed with the CM in the simulation. The results imply that the CM needs to be considered in the design of the vibration isolation system of a diesel engine to increase the accuracy and lifetime of sensors used in vehicles under severe vibration conditions.

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Numerical Optimization of SPR Sensors for Lube Oil Real-Time Optical Characterization in Large 2-Stroke Marine Diesel Engines

Cited by 5 publications

References 18 publications

Assessing the Sustainability of the Most Prominent Type of Marine Diesel Engines under the Implementation of the EEXI and CII Regulations

Assessing the Sustainability of the Most Prominent Type of Marine Diesel Engines under the Implementation of the EEXI and CII Regulations

Development of common rail lube oil injector for large two-stroke marine diesel engines

Effect of Center of Mass on Vibration-sensing Technology for Diesel Engine

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