A method for evaluating theoretical and real operation of diesel engines in energy conversion formulation taking into account their operating indices

• Autorzy: Girtler J.
• Języki publikacji: EN

Abstrakty

EN

The article proposes valuating the operation of an arbitrary diesel engine, based on the sample case of a ship’s main engine in which energy conversion processes take place in a given time. The above operation is understood as the energy transfer to the screw propeller in the given time in which the energy conversion into work and/or heat and its further transmission take place. The here proposed method for evaluating the operation of the main engines installed in marine power plants consists in comparing the operation of these engines to a physical quantity the measuring unit of which is the joule-second (joule×second). A new term is introduced which bears the name of the theoretical engine operation and is the standard (ideal) operation which can be compared to the operation of real engines revealing different levels of wear. It was shown that the calculations of the theoretical operation defined in the above way cannot make direct use of commonly known theoretical Diesel and Sabathe cycles. Instead they should use the cycles modified by heat abstraction taking place in accordance with the isobaric, or isothermal process. Other new terms introduced in the article are: the degree of excellence of energy conversion to work, considered as the measure of excellence of engine operation, and the degree of engine operation dissipation, being the measure of its real operation. It is shown that if in time t of engine operation the case takes place that: Li = idem and Le = idem, then the engine operation dissipation is equal to its mechanical efficiency.

Słowa kluczowe

EN

operation; energy; diesel engine; ship’s main engine

• Wydawca: Gdańsk University of Technology, Faculty of Ocean Engineering & Ship Technology
• Czasopismo: Polish Maritime Research
• Rocznik: 2011
• Tom: nr 3
• Strony: 31--36
• Opis fizyczny: Bibliogr. 15 poz., rys.

Twórcy

autor

Girtler J.

• Faculty of Ocean Engineering and Ship Technology Gdansk University of Technology Narutowicza 11/12 80-233 Gdansk, POLAND tel.: [phone]; fax: [phone],

Bibliografia

• 1. Aeberli K.: New high-economy engines for panama containerships and large tankers, Wartsila Switzerland Ltd, Winterthur, September 2007
• 2. Girtler J.: Work of a compression-ignition engine as the index of its reliability and safety. II International Scientifically- Technical Conference EXPLO-DIESEL & GAS TURBINE”01. Conference Proceedings. Gdansk-Miedzyzdroje-Copenhagen, 2001, pp.79-86
• 3. Girtler J.: Possibility of valuation of operation of marine diesel engines. Journal of POLISH CIMAC, Vol. 4, No 1, 2009
• 4. Girtler J.: Energy-based aspect of operation of diesel engine. COMBUSTION ENGINES (Silniki Spalinowe) No 2/2009 (137)
• 5. Girtler J.: Conception of valuation of combustion engine operation. Journal of KONES. Powertrain and Transport. Editorial Office Institute of Aeronautics BK, Warsaw 2008
• 6. Girtler J.: A method for evaluating the performance of a marine piston internal combustion engine used as the main engine on a ship during its voyage in different sailing conditions. Polish Maritime Research. Vol. 17, iss. 4(67), 2010
• 7. Girtler J.: Possibility of defining theoretical operation for diesel engines in energy terms. COMBUSTION ENGINES (Silniki Spalinowe) Nr 3/2011(146). Abstract p. 62. Full text CD: PTNSS 2011-SD-005
• 8. Łosiewicz Z.: Probabilistic diagnostic model of the marine main engine (in Polish). Ph.D. thesis, Faculty of Ocean Engineering and Ship Technology, Gdansk University of Technology, Gdansk
• 9. Piotrowski I., Witkowski K.: Operation of marine internal combustion engines (in Polish). AM, Gdynia 2002
• 10. Piotrowski I., Witkowski K.: Marine internal combustion engines (in Polish). Wyd. TRADEMAR, Gdynia 1996
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• 13. Rudnicki J.: On making into account value of operational applied to ship main propulsion engine as an example. Journal of POLISH CIMAC, Vol. 4, No 1, 2009
• 14. Wajand J.A., Wajand J. T.: Medium- and high-speed internal combustion engines (in Polish). WNT, Warszawa 2005
• 15. Wojnowski W.: Marine diesel engine power plants. (in Polish) Pt. I. Wyd. AMW, Gdynia 1998.