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The Influence of Reduction in Sailing Speed on the Efficiency and Energy Potential of the Waste Heat of the Marine Diesel Engine
Vladimir Pelić
orcid.org/0000-0003-0378-9572
; University of Rijeka, Faculty of Maritime Studies, Studentska 2, 51000 Rijeka, Croatia
*
Tomislav Mrakovčić
; University of Rijeka, Faculty of Engineering, Vukovarska 58, 51000 Rijeka, Croatia
Radoslav Radonja
orcid.org/0000-0001-6686-2381
; University of Rijeka, Faculty of Maritime Studies, Studentska 2, 51000 Rijeka, Croatia
Ozren Bukovac
; University of Rijeka, Faculty of Engineering, Vukovarska 58, 51000 Rijeka, Croatia
* Dopisni autor.
Sažetak
One of the essential conditions for the sustainable development of maritime transport is the increase
of energy efficiency, which contributes not only to economic efficiency but also to the reduction of
pollutant emissions. Reduction of pollutant emissions can be achieved by adjusting the combustion
process in the engine cylinder, after-treatment of exhaust gases, use of alternative fuels or reduction
of sailing speed. Reduction of sailing speed is widely used in container ships, as it does not require
additional investment and, if applied reasonably, has a positive effect on reducing fuel consumption
and pollutant emissions. However, it leads to an increase in sailing time, and a greater reduction in
sailing speed leads to a reduction in main engine efficiency and a reduction in the energy potential of the
waste heat. In this paper, the effects of reducing the sailing speed on the efficiency and energy potential
of the waste heat of a low-speed marine engine are investigated. The waste heat from the exhaust
gases and the engine cooling system is used to generate steam and electricity and for desalination. In
the examples studied, a 30.4% reduction in sailing speed from the planned speed results in a 53.1%
reduction in fuel consumption and a 43.8% increase in sailing time. When determining the optimal
sailing speed, it is also important to consider the specific fuel consumption data, which shows that
an engine load of 60% to 80% is optimal for efficiency. Data from the manufacturer WinGD on fuel
consumption and available waste heat for various engine loads as a function of the container ship’s
sailing speed were used for the study.
Ključne riječi
reduction of sailing speed, energy efficiency, waste heat
Hrčak ID:
317131
URI
Datum izdavanja:
16.5.2024.
Posjeta: 273 *