Methodological Design Optimization of a Marine LNG Internal Combustion Gas Engine to Burn Alternative Fuels

Zardoya, Ander Ruiz; Bengoetxea, Iñigo Oregui; Martínez, Álvaro; Lucena, Iñaki Loroño; Orosa, José A.

doi:10.3390/jmse11061194

Cited by 8 publications

(6 citation statements)

References 25 publications

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“…Biofuel is actively used in diesel engines of automobile and railway transport, as well as in stationary power generation [31,32]. The use of biofuel on marine vessels has few examples and is based on operational experience for certain diesel engines and their specific operating modes [33,34]. At the same time, in many ports there is already the possibility of bunkering with biofuel, which expands the prospects of its use both as part of fuel mixtures with fuel of petroleum origin, and as an independent fuel.…”

Section: -9969mentioning

confidence: 99%

Analysis of methods of managing the environmental safety of the navigation passage of ships of maritime transport

Sagin,

Madey

2023

TAPR

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The requirements of the MARPOL international convention on ensuring the environmental performance of marine diesel engines in relation to the emission of sulfur oxides, as well as marine fuels during navigation passages of sea transport vessels in special ecological areas, are given. The use of scrubber cleaning of exhaust gases and the use of fuel mixtures, which include biodiesel fuel, are considered as methods that meet these requirements. The research was carried out on ships of the Bulker Carrier class with deadweight of 63,246 tons during the navigation transition between the ports of Northern Europe. One of the vessels used scrubber cleaning of exhaust gases as a method of environmental safety management. The other is the use of fuel mixtures, which include biodiesel fuel. Both vessels are equipped with a 5S60ME-C8.2 MAN-Diesel&Turbo marine diesel engine as the main engine, and three 6EY18ALW Yanmar diesel engines as auxiliary engines. The ratio of sulfur oxides to carbon oxides – SO2/CO2 – was chosen as an indicator for evaluating the effectiveness of environmental safety management methods. This value was monitored and regulated by an automatic monitoring system. It was found that both methods meet the requirements of the MARPOL convention, namely, they will support the SO2/CO2 ratio in the range of 2.29–4.17 (when in special environmental control zones) and in the range of 6.46–20.83 (when in outside the zone of special environmental control). The use of environmental safety management methods increases energy costs for ensuring this process. When using exhaust gas scrubbing, additional power losses reach 237–278 kW. In the case of using a fuel mixture that includes biodiesel fuel, power losses amount to 18–20 kW. It has been experimentally confirmed that the use of a fuel mixture that includes biodiesel fuel is characterized by a lower level of environmental sustainability. At the same time, compared to the use of scrubber cleaning of exhaust gases, this method requires less energy consumption and is also characterized by simpler additional equipment. In this regard (and also taking into account that all the requirements of Annex VI MARPOL are provided), it is recommended as the main one to ensure the environmental safety of navigation passages of sea transport vessels.

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Section: -9969mentioning

confidence: 99%

Analysis of methods of managing the environmental safety of the navigation passage of ships of maritime transport

Sagin,

Madey

2023

TAPR

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“…However, these advantages also bring about a series of environmental issues, particularly the extensive emission of NOx and SOx from oceangoing vessels during their voyages. In light of this, liquefied natural gas (LNG) has emerged in recent years as the fuel of choice for shipowners due to its environmentally friendly attributes [1]. Nonetheless, before feeding LNG into dual-fuel engines, it must undergo seawater vaporization, a process that results in a cold energy loss of approximately 830 kJ/kg [2].…”

Section: Introductionmentioning

confidence: 99%

Thermo-Economic Analysis and Multi-Objective Optimization of a Novel Power Generation System for LNG-Fueled Ships

Yang,

Zou,

Lei

et al. 2023

JMSE

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Given the significant emissions from conventional marine diesel engines, many ship owners are increasingly turning to liquefied natural gas (LNG) as a cleaner energy alternative. In this study, a novel power generation system is proposed for LNG-fueled ships, integrating LNG cold energy and waste heat of the main engine, while considering the pressure of LNG. Firstly, this paper compares the two-stage parallel organic Rankine cycle to highlight its superiority. Secondly, the exergy loss and component cost of the system are analyzed, and the influence of these parameters on the thermal economy of the system is discussed. Finally, the multi-objective genetic algorithm is used to select the system exergy efficiency and electricity production cost (EPC), and the optimal performance point of the system is determined. Based on this, the performances of different literature studies are compared, and the system’s potential impact on the environment is evaluated. The results show that the net output power, thermal efficiency, exergy efficiency, EPC, payback period, and CO2 emission reduction of the system are 336.3 kW, 39.38%, 44.38%, 0.043 USD/kWh, 2.68 years, and 21,540 tons, respectively. Therefore, the system provides a new solution for energy saving and emission reduction of ships.

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“…Traditional methane storage includes liquefied natural gas (LNG) and compressed natural gas (CNG). Although LNG can store methane with commendable energy density, the additional energy must be consumed for cooling at 112 K [5]. CNG consumes a lot of energy to pressurize over 20 MPa for compressing natural gas since methane is a supercritical gas at room temperature [6].…”

Section: Introductionmentioning

confidence: 99%

Experimental Studies of Methane Adsorption on Activated Carbon and 3D Graphene Materials

Zhu,

Zhang

2023

Processes

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Two kinds of slit pore carbon materials, namely activated carbon (AC) and 3D graphene materials (3D-GS), were purchased to examine their methane storage capabilities. The structural analysis and characterization of AC and 3D-GS were carried out using X-ray diffraction (XRD), scanning electron microscopy (SEM), the X-ray energy dispersive spectrum (EDS), and N2 adsorption/desorption isotherms. Additionally, a thermodynamic framework was employed in the Henry’s law region to evaluate the potential well between the adsorbed fluid and adsorbent. The adsorption behavior of methane on two materials at room temperature and high pressure was also investigated. The results show that the Toth equation is the most suitable model for predicting adsorption isotherms than the Langmuir and L-F equations and determines that the absolute uptake of methane storage on AC and 3D-GS are, respectively, 7.86 mmol·g−1 and 8.9 mmol·g−1 at 298 K and 35 bar. In the Henry’s law region, the isosteric heat of methane adsorption on 3D-GS is larger than that of AC. Meanwhile, the potential well between methane and carbon-based materials decreases as the temperature increases. This indicates that the capacity of methane uptake is enhanced at lower temperatures, which is consistent with the measurements of adsorption isotherms. The research concludes that the 3D-GS is more suitable as a material storage medium than AC. This study provides valuable theoretical guidance for exploring the potential of methane storage on slit pore carbon-based material.

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Methodological Design Optimization of a Marine LNG Internal Combustion Gas Engine to Burn Alternative Fuels

Cited by 8 publications

References 25 publications

Analysis of methods of managing the environmental safety of the navigation passage of ships of maritime transport

Analysis of methods of managing the environmental safety of the navigation passage of ships of maritime transport

Thermo-Economic Analysis and Multi-Objective Optimization of a Novel Power Generation System for LNG-Fueled Ships

Experimental Studies of Methane Adsorption on Activated Carbon and 3D Graphene Materials

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