2017
DOI: 10.1177/1475090217690964
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Abstract: The article shows the performance comparison between two marine engines, fuelled by diesel oil and natural gas respectively. Two different simulation codes, each for engine type, have been developed to extend the comparison to the whole working area of the examined engines. Although the maximum continuous power is very similar (about 2 MW at the same rotational speed), some differences exist in size, efficiency and pollutant emissions. The reasons are investigated through a specific thermodynamic analysis, by … Show more

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Cited by 22 publications
(17 citation statements)
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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%
See 1 more Smart Citation
“…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%
“…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%
“…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%