Simulation and performance comparison between diesel and natural gas engines for marine applications

Altosole, Marco; Benvenuto, G.; Campora, Ugo; Laviola, Michele; Zaccone, Raphael

doi:10.1177/1475090217690964

Cited by 24 publications

(24 citation statements)

References 18 publications

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“…These two engines are characterized by a maximum continuous rating (MCR) power of 2 MW and 2.16 MW respectively, at the same rotational speed (1000 rpm). The comparison between reference and simulation data, reported in [32], showed a good simulator accuracy: the errors are generally less than 2% in the MCR engine load conditions, and less than 5% in the other examined working conditions of the engines.…”

Section: Engine Models Application and Validationmentioning

confidence: 77%

“…The described thermodynamic model (characterised by the actual cycle "cylinders" module [31]) was recently applied to the performance simulation of two marine engines by Rolls Royce: the diesel engine RR C25:33L6P and the natural gas fed engine RR C26:33L8PG (where in the latter, the "cylinders" module is adapted for the natural gas combustion simulation [32]). These two engines are characterized by a maximum continuous rating (MCR) power of 2 MW and 2.16 MW respectively, at the same rotational speed (1000 rpm).…”

Section: Engine Models Application and Validationmentioning

confidence: 99%

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A Diesel Engine Modelling Approach for Ship Propulsion Real-Time Simulators

Altosole

Campora

Figari

et al. 2019

JMSE

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A turbocharged diesel engine numerical model, suitable for real-time ship manoeuvre simulation, is presented in this paper. While some engine components (mainly the turbocharger, intercooler and manifolds) are modelled by a filling and emptying approach, the cylinder simulation is based on a set of five-dimensional numerical matrices (each matrix is generated by means of a more traditional thermodynamic model based on in-cylinder actual cycle). The new cylinder calculation approach strongly reduces the engine transient computation time, making it possible to transform the simulation model into a real-time executable application. As a case study, the simulation methodology is applied to a high speed four stroke turbocharged marine diesel engine, whose design and off design running data are available from the technical sheet. In order to verify the suitability of the proposed model in real-time simulation applications, a yacht propulsion plant simulator is developed. Numerical results in ship acceleration and deceleration manoeuvres are shown, reducing the simulation running time of 99% in comparison with the corresponding in-cylinder actual cycle engine model.

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Section: Engine Models Application and Validationmentioning

confidence: 77%

Section: Engine Models Application and Validationmentioning

confidence: 99%

A Diesel Engine Modelling Approach for Ship Propulsion Real-Time Simulators

Altosole

Campora

Figari

et al. 2019

JMSE

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“…With regard to carbon dioxide (CO 2 ), it is estimated by means of the Energy Efficiency Design Index (EEDI), defined by IMO as the CO 2 production per transport work of the vessel (i.e., grams of CO 2 per ton-mile) [4,5]. New ships will have to comply with EEDI, leading to a continuous search for energy-efficient technical solutions, as using more eco-friendly fuels (e.g., LNG [6][7][8][9]).…”

Section: Introductionmentioning

confidence: 99%

Simulation Techniques for Design and Control of a Waste Heat Recovery System in Marine Natural Gas Propulsion Applications

Altosole

Campora

Donnarumma

et al. 2019

JMSE

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Waste Heat Recovery (WHR) marine systems represent a valid solution for the ship energy efficiency improvement, especially in Liquefied Natural Gas (LNG) propulsion applications. Compared to traditional diesel fuel oil, a better thermal power can be recovered from the exhaust gas produced by a LNG-fueled engine. Therefore, steam surplus production may be used to feed a turbogenerator in order to increase the ship electric energy availability without additional fuel consumption. However, a correct design procedure of the WHR steam plant is fundamental for proper feasibility analysis, and from this point of view, numerical simulation techniques can be a very powerful tool. In this work, the WHR steam plant modeling is presented paying attention to the simulation approach developed for the steam turbine and its governor dynamics. Starting from a nonlinear system representing the whole dynamic behavior, the turbogenerator model is linearized to carry out a proper synthesis analysis of the controller, in order to comply with specific performance requirements of the power grid. For the considered case study, simulation results confirm the validity of the developed approach, aimed to test the correct design of the whole system in proper working dynamic conditions.

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“…As regards the type of fuel, the use of natural gas (NG) instead of the more traditional Heavy Fuel Oil (D) strongly reduces engine polluting emissions (indicatively [20]: carbon dioxide −25 ÷ −30%, carbon monoxide: −25%, nitrogen oxides -85%, sulphur oxides −99 ÷ −100%, particulate matter −90 ÷ −99%). Furthermore, at medium-high engine loads [20], the NG allows 1 ÷ 2% higher engine efficiency compared to traditional marine liquid fuels.…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, at medium-high engine loads [20], the NG allows 1 ÷ 2% higher engine efficiency compared to traditional marine liquid fuels.…”

Section: Introductionmentioning

confidence: 99%

Efficiency Improvement of a Natural Gas Marine Engine Using a Hybrid Turbocharger

et al. 2018

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Abstract:The use of a computer simulator, previously developed and validated, applied to a four-stroke marine dual-fuel engine, has allowed the authors to present in this paper a solution to improve the overall efficiency of the engine by adopting a hybrid turbocharger. This component replaces the original one allowing, in addition to maintaining the previous usual functions, the production of electricity to satisfy part of the ship's electric load. In this study the application of the hybrid turbocharger concerns an engine powered by natural gas in particular. The turbocharger substitution involves a significant variation of the engine load governor operating mode. The improved engine characteristics that the hybrid turbocharger facilitates, compared to the original, are highlighted by the results reported in tabular and graphical form, for different engine loads and speeds.

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Simulation and performance comparison between diesel and natural gas engines for marine applications

Cited by 24 publications

References 18 publications

A Diesel Engine Modelling Approach for Ship Propulsion Real-Time Simulators

A Diesel Engine Modelling Approach for Ship Propulsion Real-Time Simulators

Simulation Techniques for Design and Control of a Waste Heat Recovery System in Marine Natural Gas Propulsion Applications

Efficiency Improvement of a Natural Gas Marine Engine Using a Hybrid Turbocharger

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