Ship Climate and Ship Performance

Recently, the big data can be employed as the economical ship operating or evaluation of ship performance conditions. However, such data cannot be easily obtained and analyzed for every ship. In this case, for example, an evaluation of ship performance during operation is usually dependent on ship owner’s experience. The time-dependent ship performance is an essential topic for ship owners because if they realize their current ship performance, they can implement something such as hull or propeller cleaning for their economical operation. This study is focused on the usage of noon report data rather than the big data due to their obtainability. Usually, such data are considered as references because different ship operational condition and environmental condition obscure current ship performance. However, our unique approach, which is used integrally the noon report data such as BHP, propeller revolution and fuel oil consumption, ship sea trial data and propeller performance, can be evaluated ship performance during ship in service. The analyzed output data can be produced as increasing of ship resistance (delta Rw) versus ship performance efficiency, fuel oil consumption (ton per day) or sea margin. Under this output conditions, it can be comparable at same conditions even though the conditions of operations are different. Therefore, this analyzed data has a potential ability to have a look at ship performance conditions during ship in service. The purpose of this paper is to introduce our unique approach using noon data for time-dependent ship performance and then discuss the verification of this approach. As the case study, the noon report data for Japanese domestic bulker was chosen and the ship performance was evaluated in terms of different points of views. It was done comparing the conditions of before and after dry dock to evaluate our approach. In addition, the potential application of this approach will be discussed in this paper.

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Verification of Ship Performance Evaluation Method with Onboard Measurement

Journal of the Japan Society of Naval Architects and Ocean Engineers ◽

10.2534/jjasnaoe.12.17 ◽

2010 ◽

Vol 12 ◽

pp. 17-24

Author(s):

Naoto Sogihara ◽

Michio Ueno ◽

Kunihiro Hoshino ◽

Masaru Tsujimoto ◽

Noriyuki Sasaki

Keyword(s):

Performance Evaluation ◽

Evaluation Method ◽

Performance Evaluation Method ◽

Ship Performance

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An Empirical Review of the Design and Performance of Icebreakers

Marine Technology and SNAME News ◽

10.5957/mt1.1989.26.2.145 ◽

1989 ◽

Vol 26 (02) ◽

pp. 145-159

Author(s):

R. A. Dick ◽

J. E. Laframboise

Keyword(s):

United States ◽

Soviet Union ◽

State Of The Art ◽

The United States ◽

West Germany ◽

The United Kingdom ◽

The Soviet Union ◽

And Performance ◽

Ship Performance ◽

Selection Of

This paper utilizes available data on existing icebreaking ships to compile a review of the design features that influence ship performance. The data were extracted from a recently completed review of the state of the art of Arctic ship technology and include icebreaking ships from Argentina, Canada, Denmark, Finland, Japan, Sweden, the United Kingdom, the Soviet Union, the United States, and West Germany. It is the aim of this paper to offer guidance in the initial stages of icebreaker design and thereby give confidence to the designer in the selection of dimensions, hull shape and propulsion.

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SHIP DATA DRIVEN PROPULSION MODELS & WIND-BASED PROPULSION TECHNOLOGY

10.3940/rina.win.2019.07 ◽

2019 ◽

Author(s):

J. E. Buckingham ◽

D. R. Pearson ◽

E Storey

Keyword(s):

Economic Analysis ◽

Energy Saving ◽

Business Case ◽

Data Driven ◽

First Principle ◽

Baseline Model ◽

Ship Model ◽

Fuel Savings ◽

Monetary Savings ◽

Ship Performance

This paper presents the approach taken to develop and align a parametric ship model to metocean data and known ship performance data measured at sea, and the use of this aligned baseline model in conjunction with first principle models of wind-based Energy Saving Technologies (EST) to derive the benefit of such technologies over specific voyages. The EST compared in this paper are: • Flettner rotors • Wingsails • Turbosails A specific voyage conditions are studied for a given ship in order to provide a broad and representative range of seagoing conditions for the vessel, with the model then being used to derive the relative fuel savings from the EST. This output can then be run-through a techno-economic analysis to derive the monetary savings and inform a potential business case for installation of such EST. The vessel presented in this paper is a 61,000 dwt bulker, which has served as a demonstrator vessel in previous BMT publications and is a well understood baseline for comparison.

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Scale Model Testing of a Commercial Rim-Driven Propulsor Pod

Journal of Ship Production ◽

10.5957/jsp.2003.19.2.121 ◽

2003 ◽

Vol 19 (02) ◽

pp. 121-130 ◽

Cited By ~ 2

Author(s):

Michelle Lea ◽

Donald Thompson ◽

BillVan Blarcom ◽

Jon Eaton ◽

Juergen Friesch ◽

...

Keyword(s):

Rotor Blades ◽

Hydrodynamic Performance ◽

Scale Model ◽

Cruise Ships ◽

Podded Propulsor ◽

Ship Owner ◽

Marine Industry ◽

Blade Row ◽

Improved Performance ◽

Ship Performance

Podded propulsion is gaining more widespread use in the marine industry and is prevalent in newer cruise ships in particular. This propulsion system can provide many advantages to the ship owner that include increased propulsion efficiency, arrangement flexibility, payload, and harbor maneuverability. A new, unique podded propulsor concept is being developed that allows optimization of each element of the system. The concept comprises a ducted, multiple-blade row propulsor with a permanent magnet, radial field motor rotor mounted on the tips of the propulsor rotor blades, and the motor stator mounted within the duct of the propulsor. This concept, designated a commercial rim-driven propulsor pod (CRDP), when compared to a conventional hub-driven pod (HDP), offers improved performance in a number of areas, including equal or improved efficiency, cavitation, and hull unsteady pressures. The combination of these CRDP performance parameters allows the ship designer much greater flexibility to provide improved ship performance as compared to that of an HDP. A CRDP is being developed to power a panamax-size cruise vessel. The paper addresses the hydrodynamic performance of that CRDP design demonstrated at 1/25th scale as tested at the Hamburg Ship Model Basin, Hamburg Germany (HSVA).

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