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Influence of ship behaviour in a seaway on CO2 emissions


Prpić-Oršić, Jasna; Faltinsen, Odd Magnus; Mrakovčić, Tomislav
Influence of ship behaviour in a seaway on CO2 emissions // Proceedings of the ASME 2013 32nd International Conference on Ocean, Offshore and Arctic Engineering OMAE2013 / American Society of Mechanical Engineers (ur.).
New York: ASME, 2013. str. 1-8 (predavanje, međunarodna recenzija, cjeloviti rad (in extenso), znanstveni)


Naslov
Influence of ship behaviour in a seaway on CO2 emissions

Autori
Prpić-Oršić, Jasna ; Faltinsen, Odd Magnus ; Mrakovčić, Tomislav

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Proceedings of the ASME 2013 32nd International Conference on Ocean, Offshore and Arctic Engineering OMAE2013 / American Society of Mechanical Engineers - New York : ASME, 2013, 1-8

Skup
32nd International Conference on Ocean, Offshore and ArcticEngineering

Mjesto i datum
Nantes, Francuska, 9-14.6.2013

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Added resistance; ship speed; CO2 emissions

Sažetak
A reliable prediction of attainable ship speed at actual seas is essential from economical and environmental aspects. At this paper a methodology for estimating the attainable speed and related fuel consumption and carbon dioxide (CO2) emissions in moderate and severe sea is proposed. The irregular sea is handled as a series of regular waves with different amplitudes and frequencies. The added resistance in regular waves is obtained by either a direct pressure integration method or an asymptotic small wavelength formula. The in-and- out-of-watereffect and ventilation of a propeller in severe seas is accounted for by a quasi-steady averaging of experimental data for different propeller submergences. The propulsion results for regular waves are used in simulating results in irregular waves. It is shown that for higher sea states this effect has much more influence on the speed loss than the added resistance in waves. The speed loss is calculated by taking into account the engine and propeller performance in actual seas as well as the mass inertia of the ship. The numerical model used for main propulsion engine modeling is based on a zero-dimensional model of an internal combustion engine. The main propulsion engine is represented by number of control volumes interconnected with links for mass and energy transfer between them. This model provides excellent prediction of engine dynamic response during transients with rather short computational time. Also, engine fuel consumption can be precisely determined which represents the basic presumption for estimation of carbon- dioxide emission. Furthermore, use of such model can be extended to determination of the lowest fuel oil consumption strategy for given sea condition and ship speed with resulting lowest possible CO2 emissions. The attainable ship speed is obtained as time series. Correlation of speed loss with sea states allows predictions of propulsive performance in actual seas.

Izvorni jezik
Engleski

Znanstvena područja
Brodogradnja



POVEZANOST RADA


Projekt / tema
069-0691668-1725 - Numeričke simulacije i optimizacija brodskih dizelskih motora (Vladimir Medica, )
069-0691736-1667 - Numeričko modeliranje hidrodinamičkog opterećenja i odziva pomorskih objekata (Jasna Prpić-Oršić, )

Ustanove
Tehnički fakultet, Rijeka