use of ESDs can manage environmental pollution especially air pollution. Key words: propeller boss cap fins (PBCF), integrative design, increased loading in blade root Introduction The propeller boss cap fins (PBCF) is an effecti- ve energy saving device, which can recover the energy loss due to the propeller hub vortex in the propeller down stream flow and eliminate the low-pressure area behind the boss cap. MOL's Propeller Boss Cap Fins earns Guinness World Record Title. The fins serve to control the flow over the propeller hub, thus diffusing the vortexes created by the hub. It consists of a propeller boss fitted with short blades inclined to convert hub vortex energy into additional torque and thrust transmitted back to the shaft. In the resistance test, the total resistance and the . Propeller Boss Cap Small cap. Excellent maneuverability exhibited by a Super VecTwin System is achieved by incorporated joystick control. 18: Propeller Boss-Cap Fins Fig. The primary function of PBCF is to improve the propeller performance characteristics, via, but not limited to, minimising the hub vortex and resultant rudder cavitation. With the innovative Energy Saving Cap (Escap®) from MMG, ship owners can increase the efficiency of their vessels propulsion system by up to 3%. Therefore, the fins looks to me to be a kind of hub stator used for diffusing the hub vortex and thereby increasing propulsor efficiency. (2012). This can be exercised by installing Energy Saving Devices (ESD) such as Propeller Received in revised form Boss Cap Fins (PBCF). I would guess the covered picture could be some kind of propeller boss cap fin system which would even be more effective in improving propulsive efficiency. It is being widely accepted for its economic value in fuel saving and low investment, especially for medium and large vessels. . What is the Propeller Boss Cap Fins (PBCF) System Propeller Boss Cap Fins System, PBCF in short, is an energy-saving device attached to the propeller of a vessel. PBCF is an energy-saving device attached to the propeller of a vessel. Data . Lines (MOL) has announced that Propeller Boss Cap Fins (PBCF), marketed by its group company MOL Techno-Trade (MOL Tech), have now been ordered for 3,500 vessels. shown in Figure 1, the PBCF consists of small fins attached on the boss cap fixed to the propeller and is designed to recover energy from the propeller hub vortex. Lines, Ltd. The PBCF system is custom made, with a design optimized for the shape of the vessel's propeller. The research and development of PBCF were originally carried out by Ouchi et al. The PBCF is an integral part of the propeller, with no other moving parts. OuchiK, OguraM, KonoY, et al. In this paper, the PBCF and the propeller are considered as a whole system with their design as an integrative process, in which the concept of the increased loading in . Since the introduction in 1987, it is used widely for its good performance. In addition to an exhaust gas cleaning system, the vessel is also fitted with a ballast water management system and microplastic recovery system. Journal of Society of Naval Architects of Japan 163, pp.66-78. Lines, Ltd. announced that its Propeller Boss Cap Fins (PBCF), sold by its group company MOL Techno-Trade, Ltd. was certified as the "Best-selling Energy-Saving Ship Appendage Brand (Cumulative)", by Guinness World Records, and received the official certificate on December 23, 2021.This award is based on the . The Propeller Boss Cap Fins (PBCF) is a device for propeller efficiency improvement developed by Mitsui O. S. K. Lines, Ltd. In 1988, Ouchi first introduced the Propeller Boss Cap Fins (PBCF) to recovery the rotational energy from the hub vortex and increase the propulsive efficiency. Marine propeller PBCF (Propeller Boss Cap Fins) is an extra hub with small fins attached to propeller cap to increase power efficiency. (1988). The PBCF can recover energy loss of a propeller hub vortex in the propeller's backward flow. The present study aims to investigate effects of design variations of PBCFs on the propulsive efficiency and propeller wake field, with special attention on hub vortex dynamics. (1988, 1989, 1992) They This effect is seen clearly in the two photographs of the model tests, included with this article. In some cases, this system is called PBCF (Propeller Boss Cap Fins). Mitsui O.S.K. Propeller Boss Cap Fins being prepared for installation. Thus propulsive efficiency is improved. PBCF (Propeller Boss Cap Fins) Development Story; 2020/03/13 Environment Introduction of Rotor Sail (Wind propulsion system) 2020/02/12 Technology Study on Clarification of Hydrodynamic Mechanisms of PBCF; 2020/02/12 Energy saving Model and Full Scale Evaluation of PBCF Fitted to an Aframax Tanker; 2020/07/28 Environment 9 is a drawing showing a case where, in the mode for carrying out the present invention, fins 3c are appended on a propeller boss cap 3a of the propeller 3, so that they make the propeller boss cap 3a generate a stream in the same direction as a propeller slip stream generated by propeller blades 3b. 'A Research and Development of PBCF(Propeller Boss Cap Fins)-Improvement of Flow from Propeller Boss'. However, the configuration of hub slope on a different type of hub cap is very sensitive to whole propeller system performance. The propellers will be aligned front to back and fitted with propeller boss cap fins. Unlike conventional propeller caps, the MMG-Escap® features an ingenious fin design that untwists the hub vortex while significantly reducing torque loss. Basic Mechanism of PBCF Effect. Mitsui O.S.K. Propeller Boss Cap. PBCF is the originated device to be focused in the . It breaks up the hub vortex generated behind the rotating propeller, resulting in a decrease of more than 9,000 tons of. The PBCF is an integral part of the propeller, with no other moving parts. The present study aimed to identify significant design parameters on the propeller open water efficiency and characteristics of the wake field of a propeller with propeller-boss-cap-fins (PBCFs), with special attention to hub vortex dynamics. The purpose is to study the impact of PBCFs on the hydrodynamic performance Lines Techno Trade Co., Ltd., an MOL Group Company. It also has environmentally friendly specifications in line with "MOL Group Environmental Vision 2.1" such as Hybrid Fin (energy-saving equipment to improve propulsion efficiency) which are Imabari Shipbuilding's technologies, Advanced Control for Ecology (ACE), and Propeller Boss Cap Fins (PBCF) in addition to adopting an electronically . It is being widely accepted for its economic value in fuel saving and low investment, especially for . PBCF is a simple device, having the same number of fins attached to the boss cap as that of the ship's propeller. The PBCF can recover energy loss of a propeller hub vortex in the propeller's backward flow. The PBCF system is custom made, with design optimized for the shape of the vessel's propellers. The research and development of PBCF were originally carried out by Ouchi et al. The primary function of PBCF is to improve the propeller performance characteristics, via, but not limited to, minimising the hub vortex and resultant rudder cavitation. The PBCF - Propeller Boss Cap Fins - has been developed and commercialized in 1987 by the corporate group centered in Osaka Shosen Mitsui Senpaku KK (currently Mitsui O.S.K. As a result, huge attention is drawn to the research of improving the propulsion efficiency of propeller. Japanese shipping major Mitsui O.S.K. The Propeller Boss Cap Fins consists of small fins attached to the propeller cap whilst the Propeller Cap Turbine (PCT) comprises a number of hydrofoil shaped blades integrally cast into the hub cap. Improvement in Maneuverability Even with less total rudder area of about . The focus of this thesis is to design and developed PBCF for B4-85 series propeller. Propeller Boss Cap. A new device developed in Japan to weaken this hub vortex is described. Economic pressures and regulatory requirements have brought about a great interest in improving ship propulsion efficiency. It is being widely accepted for its economic value in fuel saving and low investment, especially for medium and large vessels. Lines, Ltd. announced that its Propeller Boss Cap Fins (PBCF), sold by its group company MOL Techno-Trade, Ltd. X-Press Feeders Orders Eight Dual-fuel Methanol-powered Containerships Lead time is three to four months from order to delivery. Propeller boss cap fins (PBCF) is one of the most popular ESDs in the industry. To investigate the vibration and noise reduction effects of Propeller Boss Cap Fins (PBCF), the Large Eddy Simulation (LES) method has been employed in the noise performance estimation of a propeller-rudder system. The innovative MMG Energy Saving Cap (MMG-Escap®) enables ship owners to increase the efficiency of their propulsion system by up to 3 %. Design Method of Propeller Boss Cap Fin. In order to understand the effect of modifying the traditional form of propeller hub into the propeller boss cap fins (PBCF) form, a series of tests was conducted to discover the best type. LI Pengcheng. However, to formulate the optimal shape, we had to generate design charts that allowed for even more accurate designs by using towing tank tests and CFD (computational fluid dynamics) analysis. Lines, Ltd. (MOL) Wednesday announced that its energy-saving Propeller Boss Cap Fins (PBCF) have now been ordered for 3,000 vessels worldwide.. MOL says the PBCF technology, which was developed in 1986 by MOL, West Japan Fluid Engineering Laboratory Co., Ltd., and Nakashima-Mitsuwa Propeller Co., Ltd., results in a 3-5 percent reduction in fuel consumption. Energy-Saving Propeller Boss Cap Fins System Reaches Major Milestone - Orders Received for 3,000 Vessels (Note 3) Press release on November 24, 2016:MOL Launches "ISHIN NEXT - MOL SMART SHIP . The number of fins is the same as that of the propeller blades. Commonly called Propeller Boss Cap Fins (PBCF) in the commercial world, the technology was developed in the 1980s and it's in fairly widespread use today with thousands of ships sailing with them installed, War Zone reported. To investigate the vibration and noise reduction effects of Propeller Boss Cap Fins (PBCF), the Large Eddy Simulation (LES) method has been employed in the noise performance estimation of a propeller-rudder system. Lines said that its Propeller Boss Cap Fins (PBCF), marketed by its group company MOL Techno-Trade, has now been ordered for 3,500 vessels. The Escap® has an elaborate fin design which straightens the hub vortex and reduces torque loss. Lines (MOL) announced that propeller boss cap fins (PBCF) sold by its subsidiary MOL Tech has been certified as the "best-selling energy-saving ship appendage brand . For further information, please contact: Mitsui O.S.K. Lines, Ltd. (MOL; President & CEO: Takeshi Hashimoto) today announced that Propeller Boss Cap Fins (PBCF), sold by . Japan's Mitsui O.S.K. Installation of energy efficient devices, such as an enhanced propeller, wake equalising ducts, an air bubble lubrication system and propeller boss cap fins. Reductions of ship source sound pressure level due to changes such as those employed by the radical retrofits may result in ocean-basin-wide noise reductions. Special propeller designs have attempted to eliminate the tip vortices, but little has been done to eliminate the hub vortex and its effects. The focus of this thesis is to design and developed PBCF B - series propeller. Blade And Hub For Controllable Pitch Propeller The innovative MMG Energy Saving Cap (MMG-Escap®) enables ship owners to increase the efficiency of their propulsion system by up to 3 %. OuchiK, OguraM, KonoY, et al. Propulsion improvements of 4%-5% are claimed, based on extensive service experience. Two types of hub were employed, namely convergent and divergent. 1. Marine propeller PBCF (Propeller Boss Cap Fins) is an extra hub with small fins attached to propeller cap to increase power efficiency. Mitsui O.S.K. Propeller boss cap fins, Twisted leading edge rubber bulb, Increased propeller diameter, Waste heat recovery unit for generators, Fixed online PMI system for optimising main engine fuel consumption Advanced and hydro-dynamic hull designs through computational fluid dynamics optimisation, Ballast water treatment systems, Grey water modification, and Mitsui O.S.K. The propellers will rotate in opposite directions to distribute the load of propelling the ship. Propeller Boss Cap Fins (PBCF) is an energy-saving system to improve propeller efficiencyand reduce vessel fuel consumption, and was developed by a group of companies including MOL. (1988, 1989, 1992) They (2012). 'A Research and Development of PBCF(Propeller Boss Cap Fins)-Improvement of Flow from Propeller Boss'. PBCF was invented by Mitsui OSK Lines Techno-Trade's (MOL Tech), which recently won an award for its environmental impact-reducing technology. PBCF (Propeller Boss Cap Fins) is a kind of energy-saving devices which is installed behind the propeller and rotates along with the propeller as shown in the Fig. Commonly called Propeller Boss Cap Fins (PBCF) in the commercial world, the technology was developed in the 1980s and it's in fairly widespread use today with thousands of ships sailing with them . The hydrodynamic performance of the. Dissertation of China Ship Scientific Research Center(In Chinese). 5% energy saving, easy maintenance and permanent effect.PBCF continues to contribute towards energy saving for vessels worldwide, and is a global environmentally friendly technology. Propeller Boss Cap. Guinness World Records Certifies PBCF as Best Selling Energy Saver. 20: Post-swirl stator A different approach to the CRP system is the Grim Vane Wheel. (Note 2) - Propeller Boss Cap Fins (PBCF) is an energy-saving system to improve propeller efficiency and reduce vessel fuel consumption, and was developed by a group of companies including MOL. The number of fins is the same as that of the propeller blades. Generally, after a marine propeller design, the propeller boss cap fins (PBCF) design concerns with an optimal selection of model test results, without a due consideration of the interaction between the PBCF and the propeller. This thesis studies the performance of a propeller without and with. 1. Propeller boss cap fins (PBCF) is one of ESDs which has a function to help the main propeller gaining more efficiency. (1988). Propeller Boss Cap Fins (PBCF) is an energy-saving system to improve propeller efficiency and reduce vessel fuel consumption, and was developed by a group of companies including MOL. Generally, after a marine propeller design, the propeller boss cap fins (PBCF) design concerns with an optimal selection of model test results, without a due consideration of the interaction between the PBCF and the propeller. Propeller Boss Cap. In 2011 it has achieved the record of installation of 2000 vessels. This thesis studies the performance of a propeller without and with PBCF such as efficiency, thrust, torsion and dynamic hub vortex phenomenon. shown in Figure 1, the PBCF consists of small fins attached on the boss cap fixed to the propeller and is designed to recover energy from the propeller hub vortex. The energy generated from front propeller rotation is absorbed by the rear propeller to increase efficiency. The PBCF can recover energy loss of a propeller hub vortex in the propeller's backward flow. PBCF (Propeller Boss Cap Fins) PBCF is estimated to increase power efficiency by about 5%. For this estimation, virtual model-basin tests (resistance, POW, and self-propulsion tests) were conducted through Computational Fluid Dynamics (CFDs) simulation. Take a look at this article in maritime propulsion. The Propeller Boss Cap Fins (PBCF) is a device for propeller efficiency improvement developed by Mitsui O. S. K. Lines, Ltd. The vane wheel is a second propeller placed Thrust Fins is another device that can also be added on a downstream of the main propeller, which runs freely rudder. 7 Blade Fixed Pitch Propeller 7 blade marine propeller, extremely high efficiency,. The system has been installed on over 1,700 vessels. PBCF is an energy-saving device attached to the propeller of a vessel and breaks up the hub vortex generated behind the rotating propeller. Improvement in Speed-Power Performance With optimization of stern hull form, reaction fins, skegs, rudder angle and distance between two rudders, and restraint of hub vortex by propeller boss cap fins, a VL-Vec Twin System will exhibit superior speed-power performance to that of a conventional single rudder arrangement.. It also has environmentally friendly specifications in line with "MOL Group Environmental Vision 2.1" such as Hybrid Fin (energy-saving equipment to improve propulsion efficiency) which are Imabari Shipbuilding's technologies, Advanced Control for Ecology (ACE), and Propeller Boss Cap Fins (PBCF) in addition to adopting an electronically . Big impact. It is called the Propeller Boss Cap Fin (PBCF) and has been installed on the car carrier MERCURY ACE. This paper demonstrates an approach for optimising PBCF by using Computational 28 November 2016 Fluid Dynamics (CFD) analysis. Alternative additional propulsion technology, such as from wind powered Flettner rotors. This can be exercised by installing Energy Saving Devices (ESD) such as. . FIG. Analysis was made using the computational fluid dynamic (CFD) approach, together with ANSYS CFX code. Furthermore, propulsive efficiency is further improved by means of incorporating in the system propeller boss cap fins (PBCF) that removes propeller hub vortex. This paper presents the simulated and experimental results of propeller-rudder systems with pro-peller boss cap fins (PBCFs) and analyzes the hydrodynamic performance of PBCFs in propeller-rudder systems. and Propeller Boss Cap Fins, an energy-saving system to improve propeller efficiency and reduce vessel fuel consumption. cavitation due to both the retrofitted propellers with boss cap fins, and to propeller operation at greater depth where ambient pressure is higher. Mitsui O.S.K. Electric propulsion system/ Stern gear Shafting And Rudder System Propeller shaft line with full components customized for. The Propeller Boss Cap Fins (PBCF) is a device for propeller efficiency improvement developed by Mitsui O. S. K. Lines, Ltd. Dissertation of China Ship Scientific Research Center(In Chinese). It is now in the spotlight worldwide due to its ability to help reduce a vessel's impact on the environment. Propeller Boss Cap Fins (PBCF) are an energy saving device that can enhance propeller efficiency, thus requiring less power to propel the vessel forward at a certain speed. MOL's Propeller Boss Cap Fins earns Guinness World Record Title. Journal of Society of Naval Architects of Japan 163, pp.66-78. When PBCF was first developed, we created a formula for determining fin height, length and angle relative a variety of propeller types (4 to 6 blades). One of ESD is Propeller Boss Cap Fins ( PBCF ). The Escap® has an elaborate fin design which straightens the hub vortex and reduces torque loss. MOL's Propeller Boss Cap Fins earns Guinness World Record Title. - Propeller boss cap fins (PBCF) The energy saving device developed by Mitsui OSK. In this paper, the efficiency of Propeller Boss Cap Fins (PBCF) installed at the bulk carrier was estimated under both Propeller Open Water (POW) and self-propulsion conditions. Publisher: MOL Southern Treasure Wood Chip Carrier Oshima Shipbuilding The Propeller Boss Cap Fins consists of small fins attached to the propeller cap whilst the Propeller Cap Turbine (PCT) comprises a number of hydrofoil shaped blades integrally cast into the hub cap. The PBCF is an energy-saving device attached to the propellers of a vessel. In short, an additional hub (which extends the original one) has square profile blades which are installed abaft the propeller blades which the system is mounted on: the fins intercept waste turbulent flows and straighten them by directing them correctly in the wake. For propulsion, an innovative system is adopted that effectively converts the main engine power into propulsion power by positioning fins forward of the propellers and placing special grooves in the propeller boss cap. Marine propeller PBCF (Propeller Boss Cap Fins) is an extra hub with small fins attached to propeller cap to increase power efficiency. One of ESD is Propeller Boss Cap Fins ( PBCF ). Lines, Ltd. announced that its Propeller Boss Cap Fins (PBCF), sold by its group company MOL Techno-Trade, Ltd. New Fully-electric Towboats Will be the First in the US Chevron estimates that approximately half of the fuel savings come from the retrofitting of the PMI system, while the other half comes from the propeller boss cap fins and the hull cleaning. The global emmision from marine is 2.7 % in 2007. This decreases fuel consumption by 5% when operating at the same speed, or boosts speed by 2% with the same fuel consumption. Fountom is experienced in designi. PBCF (Propeller Boss Cap Fins) is a kind of energy-saving devices which is installed behind the propeller and rotates along with the propeller as shown in the Fig. It breaks up the hub vortex generated behind the rotating propeller, resulting in energy savings . It also has environmentally friendly specifications in line with "MOL Group Environmental Vision 2.1" such as Hybrid Fin (energy-saving equipment to improve propulsion efficiency) which are Imabari Shipbuilding's technologies, Advanced Control for Ecology (ACE), and Propeller Boss Cap Fins (PBCF) in addition to adopting an electronically . Tokyo-based Mitsui O.S.K. Source: MOL. Propeller Boss Cap Fins (PBCF) are an energy saving device that can enhance propeller efficiency, thus requiring less power to pro-pel the vessel forward at a certain speed. Influence of Design Parameter Variations for Propeller-Boss-Cap-Fins on Hub Vortex Reduction. The PBCF (Propeller Boss Cap Fins) is an Energy-Saving device produced by Mitsui O.S.K. The hub vortex LI Pengcheng. Fig. PBCF can produce a torque behind the propeller blades, which offsets a part of the propeller torque. Design Method of Propeller Boss Cap Fin. Lead time is three to four months from order to delivery. In this paper, the PBCF and the propeller are considered as a whole system with their design as an integrative process, in which the concept of the increased loading in . This decreases fuel consumption by 5% when operating at the same speed, or boosts speed by 2% with the same fuel consumption. Lines, Ltd.).

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