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Keywords: efficiency
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Proceedings Papers

Paper presented at the The 33rd International Ocean and Polar Engineering Conference, June 19–23, 2023
Paper Number: ISOPE-I-23-023
... mm/s. Both S* and Tons of Dry Solids Mass Ratio (TMR) indicated that inlet particle size and inlet concentration play an essential role in loading efficiency and overflow loss KEY WORDS: Hopper; trailing suction hopper dredger; loading process; overflow; fine sediment. INTRODUCTION The trailing...
Proceedings Papers

Paper presented at the The 33rd International Ocean and Polar Engineering Conference, June 19–23, 2023
Paper Number: ISOPE-I-23-034
... of intelligent control strategies for the cutter cutting rock process were studied. The test results show that the control strategy with constant ratio of cutter speed to torque has the lowest specific energy and higher digging efficiency. INTRODUCTION Cutter suction dredger is widely used in offshore...
Proceedings Papers

Paper presented at the The 33rd International Ocean and Polar Engineering Conference, June 19–23, 2023
Paper Number: ISOPE-I-23-484
...]) to the working temperature of the fuel cell of approximately 60 [°C]. Usually, the heating is performed by a heat exchanger with a specific figure of merit. The new approach leads to a significant increase in system efficiency, since a smaller amount of heat is needed to preheat the hydrogen. In this paper...
Proceedings Papers

Paper presented at the The 33rd International Ocean and Polar Engineering Conference, June 19–23, 2023
Paper Number: ISOPE-I-23-328
... numerical uncertainty pressure distribution equation numerical investigation reservoir surveillance axial flow pump efficiency rotor blade hydrodynamic performance Proceedings of the Thirty-third (2023) International Ocean and Polar Engineering Conference Ottawa, Canada, June 19-23, 2023...
Proceedings Papers

Paper presented at the The 33rd International Ocean and Polar Engineering Conference, June 19–23, 2023
Paper Number: ISOPE-I-23-348
... is investigated against EFD data. The comparison of the simulation results, computational requirements and efficiency of the URANS and hybrid methods is carried out. It is found that the SWENSE model has the almost same computational accuracy as the boundary wavegeneration approach, which is more time-saving...
Proceedings Papers

Paper presented at the The 33rd International Ocean and Polar Engineering Conference, June 19–23, 2023
Paper Number: ISOPE-I-23-388
... by introducing a nonlinear damping term in the simulation, which is verified by analyzing the influence of the triangular section vibrator on VIV. Combined with other scholars physical experiments, the effects of different cross-sectional shapes on the characteristics and energy conversion efficiency...
Proceedings Papers

Paper presented at the The 33rd International Ocean and Polar Engineering Conference, June 19–23, 2023
Paper Number: ISOPE-I-23-526
.... For this purpose, a Bayesian optimization framework is developed and applied to OPTShip-SJTU, an existing ship optimization solver. Among them, the CFD method is used to calculate ship performance, and the Radial Basis Function (RBF) method is adopted for hull surface deformation. To improve the efficiency of hull...
Proceedings Papers

Paper presented at the The 33rd International Ocean and Polar Engineering Conference, June 19–23, 2023
Paper Number: ISOPE-I-23-508
... to a control scenario devoid of air lubrication. The research revealed that the use of air lubrication on a KVLCC2 vessel in shallow water greatly decreases hydrodynamic forces and moments, resulting in enhanced manoeuvrability and overall operational efficiency. Specifically, air lubrication decreased...
Proceedings Papers

Paper presented at the The 33rd International Ocean and Polar Engineering Conference, June 19–23, 2023
Paper Number: ISOPE-I-23-504
... Measures for Improving Energy Efficiency Design Index (EEDI) for KCS and KVLCC2 Jun-Yup Park, Jong-Yeon Jung and Yu-Taek Seo Department of Naval Architecture and Ocean Engineering, Seoul National University Seoul, South Korea ABSTRACT To reduce greenhouse gases in industrial fields, IMO(International...
Proceedings Papers

Paper presented at the The 33rd International Ocean and Polar Engineering Conference, June 19–23, 2023
Paper Number: ISOPE-I-23-551
... combustion results in air emissions polluting environments. Finding ways to increase shipping operations efficiency without compromising the provided service quality is necessary for economic and environmental reasons. This study first used data analysis to find hidden information in one-year navigation data...
Proceedings Papers

Paper presented at the The 33rd International Ocean and Polar Engineering Conference, June 19–23, 2023
Paper Number: ISOPE-I-23-547
... a forward raked propeller delivered better performance in open water and showed improvements in hull efficiency elements. Even though cavitation increased for forward raked propellers, the pressure pulse decreased compared to conventional and aftward raked propellers. The validation case has shown very good...
Proceedings Papers

Paper presented at the The 33rd International Ocean and Polar Engineering Conference, June 19–23, 2023
Paper Number: ISOPE-I-23-556
... were generated through the formation of a reverse von Kármán street by collecting experimental data from flapping foils and fish observation data. At Strouhal numbers in the range of 0.25 to 0.35, fish and cetaceans oscillated their caudal fin where the maximum efficiency could be achieved...
Proceedings Papers

Paper presented at the The 33rd International Ocean and Polar Engineering Conference, June 19–23, 2023
Paper Number: ISOPE-I-23-554
..., and pulsating pressure is also discussed. The results show that WIG effect thruster has a wider range of applicable conditions than propeller. After medium-high speed ships, WIG does not have an advantage in efficiency, but it can bring smaller thrust deduction fraction and lower working frequency. KEY WORDS...
Proceedings Papers

Paper presented at the The 33rd International Ocean and Polar Engineering Conference, June 19–23, 2023
Paper Number: ISOPE-I-23-578
...Proceedings of the Thirty-third (2023) International Ocean and Polar Engineering Conference Ottawa, Canada, June 19-23, 2023 Copyright © 2023 by the International Society of Offshore and Polar Engineers (ISOPE) ISBN 978-1-880653-80-7; ISSN 1098-6189 www.isope.org On the Maximum Efficiency Draught...
Proceedings Papers

Paper presented at the The 33rd International Ocean and Polar Engineering Conference, June 19–23, 2023
Paper Number: ISOPE-I-23-106
... ABSTRACT The current study focuses on the application of the nonlinear negative stiffness mechanism to a Salter's duck, which is a well-known wave energy conversion (WEC) device known for its efficiency of 90% in 2D regular waves. Despite the proven efficiency of WEC devices, they face...
Proceedings Papers

Paper presented at the The 33rd International Ocean and Polar Engineering Conference, June 19–23, 2023
Paper Number: ISOPE-I-23-100
... mechanical structures, power efficiency losses and harmonics noise on the electricity output to the grid (Milne, 2016; Ahmed, 2017). Maximum Power Point Tracking (MPPT) control strategies are employed to optimize the electrical power output of rotary-wing power generators, such as wind turbines and TSTs...
Proceedings Papers

Paper presented at the The 33rd International Ocean and Polar Engineering Conference, June 19–23, 2023
Paper Number: ISOPE-I-23-060
... capacity due to large mooring angle of taut systems can partially be compensated by pile inclination. In addition, simple empirical models are developed to predict anchoring capacity and inclination efficiency. The model for anchoring capacity can estimate the capacity calculated by FEM with very good...
Proceedings Papers

Paper presented at the The 33rd International Ocean and Polar Engineering Conference, June 19–23, 2023
Paper Number: ISOPE-I-23-059
..., a crucial design parameter for this wind turbine concept, as well as the turbine s efficiency in various sea states and yaw misalignments. A total of 57 cases were simulated with various combinations of wind and waves. The results show that the structure s stability is sufficient, with a maximum inclination...
Proceedings Papers

Paper presented at the The 33rd International Ocean and Polar Engineering Conference, June 19–23, 2023
Paper Number: ISOPE-I-23-288
... on the iceberg s visible area. Observati on distance, km 100< Visible area, m2 100300 300600 600800 8001000 > 1000 0-1.5 59 75 85 78 100 100 1.5-5 55 71 86 85 100 100 5-10 50 69 87 93 100 100 10-15 46 67 88 100 100 100 15-20 50 33 50 60 80 87 > 20 0 0 50 55 60 65 1974 Efficiency of the visual method is limited...
Proceedings Papers

Paper presented at the The 32nd International Ocean and Polar Engineering Conference, June 5–10, 2022
Paper Number: ISOPE-I-22-016
... of the suction port of the blade has a significant influence on the pump head and efficiency. For the cavitation performance, the shape of the suction port of the blade has a great influence on the NPSHr of the pump. The difference of NPSHr is up to 0.8m near the design flow rate. The phenomenon of sudden drop...

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