Energy saving performance analysis of contra-rotating azimuth propulsor

Hou, Lixun; Hu, Ankang

doi:10.1016/j.apor.2018.01.001

Cited by 8 publications

(1 citation statement)

References 6 publications

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“…Work related to this ESD can be found in [20] and [21], with an example of the PBCF shown in Figure 3. Another ESD in Zone II is the Contra Rotating Propeller (CRP) [22], [23], but due to complexity in manufacturing (gearbox, shaft bearings) and high cost of maintenance for two propellers and equipment, the CRP is rarely the best choice in merchant shipbuilding. However, the energy saving effect of the CRP is known to be the largest among Zone II devices.…”

Section: Overview Of Energy Saving Devicesmentioning

confidence: 99%

Hydro-structural issues in the design of energy saving devices for ships

Bakica,

Vladimir,

Senjanović

2023

Rad Hrvatske akademije znanosti i umjetnosti

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The shipping sector is currently under growing pressure concerning the GHGs emission restriction prescribed by the International Maritime Organization (IMO). Improving the efficiency of the fleet has always been an attractive subject to the shipowners, but with the new regulations, the reduction in fossil fuel consumption has switched from optional economic benefit to a rule. One of the ways for the ship to comply with the new regulations is by installing or retrofitting Energy Saving Devices (ESDs). The ESDs exploit the axial and rotational energy losses inevitably produced by the propeller operation. The ESDs differ in shape, position and kind of energy to be recovered. This article gives an overview of the current trends and practices in the field of the ESDs, along with their classification and type of operation. Furthermore, besides the hydrodynamic design, which still holds the primary importance, structural issues are also addressed, since this subject is rarely investigated in the literature. Given the complex flow field of the ESDs influenced by propeller, ship motions, wake field and waves, applicability of numerical models is described in detail, whereby the state-of-the-art approaches are clearly highlighted. Overall, the ESDs are expected to further mature in the future given the rigid rules, the promising potential of efficiency improvements they offer and the lowcost of installation.

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