Prethodno priopćenje
Achieving EEDI Compliance Through Air Lubrication Technology: A Case Study of a 38,400 DWT Self- Unloading Bulk Carrier
Luka Jedretić
; AITAC d.o.o., Kastav, Croatia
*
Anton Turk
; University of Rijeka, Faculty of Engineering, Rijeka, Croatia
Marijana Marjanović
; University of Rijeka, Faculty of Engineering, Rijeka, Croatia
Tin Matulja
; University of Rijeka, Faculty of Engineering, Rijeka, Croatia
* Dopisni autor.
Sažetak
The International Maritime Organization (IMO) introduced the Energy Efficiency Design Index (EEDI)
as a mandatory technical measure to reduce greenhouse gas emissions from ships. This paper presents
a preliminary analysis of EEDI for a 38,400 DWT self-unloading bulk carrier designed at 3. Maj
Shipyard. Calculations were performed according to resolution MEPC.245(66), considering the main
engine characteristics (7 M 43 C, 7000 kW MCR), auxiliary engines, shaft generator, and reference
speed of 13.06 knots. Initial calculations yielded an attained EEDI of 5.866 g(CO₂)/t·nm, exceeding
the required value of 5.63 g(CO₂)/t·nm determined for Phase 1 implementation (2015-2019) with a 10
% reduction factor. Analysis identified the hydrodynamically non-optimized hull form characteristic of
bulk carriers as the key limiting factor. To achieve compliance, optimization was conducted through
implementation of an air lubrication system, based on empirical models predicting 13.1 % friction drag
reduction. Implementation of this technology resulted in an effective power reduction of 365.46 kW,
achieving an EEDI value of 5.46 g(CO₂)/t·nm. Results indicate the necessity of integrating innovative
energy-efficient technologies during early design stages of bulk carriers to meet increasingly stringent
environmental standards, particularly considering future implementation phases requiring up to 30 %
reduction by the end of 2025.
Ključne riječi
EEDI, bulk carrier, energy efficiency, air lubrication, maritime emissions, IMO regulations
Hrčak ID:
347251
URI
Datum izdavanja:
19.5.2026.
Posjeta: 0 *