Pregledni rad
Comparative Analysis of Energy Saving Devices for Retrofitting Existing Ships
Ines Bezić
; University of Split, FESB, Split, Croatia
*
Petra Tepić
; Adriatic Propeleri d.o.o, Bibinje, Croatia
Joisp Bašić
; University of Split, FESB, Split, Croatia
Branko Blagojević
; University of Split, FESB, Split, Croatia
* Dopisni autor.
Sažetak
This study investigates the application of Energy Saving Devices (ESDs) on existing ships up to 50 m in length, with a focus on retrofitting options. A key inefficiency in marine propellers is the rotational (swirl) flow in the wake, which increases vibration, cavitation, and underwater radiated noise (URN). ESDs have been developed to mitigate swirl losses, including pre-swirl devices (stators, ducts) and post-swirl devices (Propeller Boss Cap Fins (PBCF), twisted rudders, Grim Vane Wheel). A comprehensive comparison was conducted among various ESDs regarding their impact on propulsion efficiency, vibration and noise levels, and installation complexity. While pre-swirl devices provide higher efficiency gain, the results show that the PBCF is the preferable device, with significant reductions in hub vortex losses. The findings provide guidance for selecting optimal ESD configurations for existing vessels seeking improved efficiency with minimal structural changes.
Ključne riječi
Energy Saving Devices (ESDs), Propulsion Efficiency, Vibrations, Noise, Retrofitting Ships
Hrčak ID:
347249
URI
Datum izdavanja:
19.5.2026.
Posjeta: 0 *