Marine diesel engine – a novel approach of indicated power determination and related uncertainty level

• Autorzy: Kowalak P. , Żmudzki S. , Borkowski T.

Identyfikatory

DOI

10.19206/CE-2017-102

• Języki publikacji: EN

Abstrakty

EN

A proposal of a new method for marine engine indicated power determination, based on direct piston position, instead of crankshaft angular position measurement, was presented. With the aid of bond graph theory, it was proved, that the new method is equivalent to conventional method. To verify hypothesis, that the new method has potential of determined indicated power uncertainty reduction, simulated calculations were carried out. Results of calculations for two marine diesel engines: medium-speed, four stroke and slowspeed two stroke type, at assumption of engine crankshaft constant speed, were compared with results obtained by a conventional method. Data, collected by means of a typical portable, industrial, digital indicator on engines in service, were used for simulation. The uncertainties of engines indicated power determined by means of two methods were analysed. The indicated power uncertainty, achieved for conventional method, was nearly twice higher than for new proposed method. Finally, uncertainty structure was analysed and evaluated for both: new and conventional method of engine indicated power determination.

Słowa kluczowe

EN

marine diesel engine; indicated power; uncertainty

PL

silnik okrętowy; moc indykowana; niepewność

• Wydawca: Polskie Towarzystwo Naukowe Silników Spalinowych
• Czasopismo: Combustion Engines
• Rocznik: 2017
• Tom: R. 56, nr 1
• Strony: 15--20
• Opis fizyczny: Bibliogr. 13 poz.

Twórcy

autor

Kowalak P.

• Institute of Marine Power Plants Operation, Faculty of Marine Engineering, Maritime University of Szczecin

autor

Żmudzki S.

• Faculty of Marine Engineering, Maritime University of Szczecin

autor

Borkowski T.

• Faculty of Marine Engineering, Maritime University of Szczecin

Bibliografia

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• [5] HEYWOOD, J.B. Internal combustion engines fundamentals. Singapore, 1988. McGraw-Hill.
• [6] BROWN, W.L. Methods for evaluating requirements and errors in cylinder pressure measurement SAE Technical Paper. 1967, 670008.
• [7] KOWALAK, P. Marine engine indicated power uncertainty determination. Combustion Engines. 2015, 161(2), 3-13.
• [8] STAŚ, M.J. An universally applicable thermodynamic method for T.D.C. determination. SAE Technical Paper. 2000, 2000-01-0561.
• [9] CICHY, M. Silniki o działaniu cyklicznym podstawy teorii działania [Cyclic engines theory and fundamentals]. 1989, Gdańsk: Wydawnictwo Politechniki Gdańskiej.
• [10] International Organization for Standardisation. 1995. Guide to the expression of uncertainty in measurement. Geneva: ISO.
• [11] KOWALAK, P. Speed irregularity characteristic of low speed, two-stroke marine diesel engine applied as vessel's main propulsion. Journal of KONES Powertrain and Transport. 2008, 15(4), 263-268.
• [12] TAZEROUT, M., LE CORRE, O., ROUSSEAU, S. TDC determination in IC engines based on the thermodynamic analysis of the temperature-entropy diagram. SAE Technical Paper. 1999, 1999-01-149.
• [13] WIMMER, A., GLASER, J. Indykowanie silnika [Engine’s indication]. 2004, Warsaw: Instytut Zastosowań Techniki.

Uwagi

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę (zadania 2017).