出版者

The Japan Institute of Marine Engineering

雑誌

日本舶用機関学会誌 (ISSN:03883051)

巻号頁・発行日

vol.30, no.7, pp.489-527, 1995

著者

吉川 文隆 矢野 昭彦 内田 幸宏 藤田 健二 川添 強 佐田 裕之

出版者

The Japan Institute of Marine Engineering

雑誌

Marine engineering : journal of the Japan Institution of Marine Engineering = マリンエンジニアリング : 日本マリンエンジニアリング学会誌 (ISSN:13461427)

巻号頁・発行日

vol.43, no.1, pp.123-129, 2008-03-01

参考文献数

7

被引用文献数

1

---

Propeller shaft diameter of ferries becomes larger in conjunction with requirements of higher vessel's speed and CPPs (controllable pitch propellers) . Thus, it may lead into a tendency to reduce the life duration of stem tube bearing under seawater lubrication. Wear of the propeller shaft sleeve, i.e. bronze alloy, is typically greater than that of the rubber bearings, with triangularly shaped craters appearing on the sleeve surface.<BR>In this paper, we describe the investigation of used sleeve sample taken from an actual vessel, as well as the wear characteristics of bronze alloys conducted under the corrosive wear condition which is equivalent to actual ferry service. The results indicated that corrosive wear was the main cause of sleeve wear. Comparing between the amount of wear in seawater and the one in distilled water, the influence of corrosion on sleeve wear was found to be substantial. Additionally, the craters are considered to be formed by the action of erosion corrosion

著者

桑田 宏策 上中 昂和

出版者

The Japan Institute of Marine Engineering

雑誌

日本舶用機関学会誌 (ISSN:03883051)

巻号頁・発行日

vol.14, no.6, pp.465-467, 1979

著者

水谷 慎吾 飛鳥II機関部

出版者

The Japan Institute of Marine Engineering

雑誌

Marine engineering : journal of the Japan Institution of Marine Engineering = マリンエンジニアリング : 日本マリンエンジニアリング学会誌 (ISSN:13461427)

巻号頁・発行日

vol.47, no.2, pp.74-79, 2012-03-01

著者

加藤 勝則

出版者

The Japan Institute of Marine Engineering

雑誌

Marine engineering : journal of the Japan Institution of Marine Engineering = マリンエンジニアリング : 日本マリンエンジニアリング学会誌 (ISSN:13461427)

巻号頁・発行日

vol.47, no.2, pp.26-31, 2012-03-01

著者

劉 秋生 福田 勝哉 松田 拓馬

出版者

The Japan Institute of Marine Engineering

雑誌

マリンエンジニアリング (ISSN:13461427)

巻号頁・発行日

vol.39, no.12, pp.899-904, 2004-12-01 (Released:2010-05-31)

参考文献数

12

---

Carbon dioxide (CO2) ocean sequestration technologies, such as dissolution into seawater, are important to promote protection of the global environment. In this study, the solution process of CO2gas in seawater and pure water was experimentally studied under various pressures and temperatures to evaluate the solubilities of CO2in seawater. The solubilities of CO2in seawater and pure water were measured by the change in pressure due to absorption at pressures up to 1500 kPa and temperatures ranging from 20°C to 60°C. We found that the solubilities of CO2were between 0.27×10-3and 5.45×10-3in seawater, and between 0.26×10-3and 0.6×10-3in pure water near atmospheric pressure. They increase with an increase in pressure, but decrease with an increase in temperature. The Henry's law constant of CO2was about 200 MPa at a temperature of 20°C in seawater under 500 kPa, and increased with an increase in temperature. The solubility of CO2in seawater was lower than that in pure water. We obtained empiri-cal correlations for solubilities of CO2in seawater and pure water at various temperatures under atmospheric pressure, based on the experimental data.

著者

久保 博尚 長瀬 通昭 板谷 芳樹 大森 丈治 吉岡 勝

出版者

The Japan Institute of Marine Engineering

雑誌

日本舶用機関学会誌 (ISSN:03883051)

巻号頁・発行日

vol.22, no.4, pp.263-270, 1987

被引用文献数

1

---

Various attentions have been paid to improvement of propeller efficiency. Among these devices, the free rotating propeller (vane wheel) to be fitted additionally behind conventional main propeller is the most attractive one. However the design method, blade strength, etc. of the free rotating propeller are not specified.<BR>The authors designed the free rotating propeller for the ship by applying the momentum theory and the blade element theory that are used for designing the hydraulic machineries. In this report, the design accuracy is compared with full-scale measurements and as the results, the following conclusions are obtained.<BR>(1) The calculated revolutions and energy saving rate of the free rotating propeller show a similarity to those of measurements.<BR>(2) Measured energy saving rate is 6-8.5% at same speed condition.<BR>(3) The mean blade stress is 2.6kgf/mm<SUP>2</SUP> {25 MPa} and the fluctuation of blade stress for a rotation is 8.8kgf/mm<SUP>2</SUP> {86 MPa} in peak-to-peak value.<BR>(4) The pressure fluctuation caused by main propeller is reduced by 20% at the blade frequency components.

著者

渡辺 専治 伊藤 勝行

出版者

The Japan Institute of Marine Engineering

雑誌

日本舶用機関学会誌 (ISSN:03883051)

巻号頁・発行日

vol.30, no.9, pp.668-673, 1995-09-01

参考文献数

7

---

Recentry, engine troubles caused by water and mold in gas oil occur in pleasure boats, small training ships and co-gene plants, etc diesel engine systems. Mold stops strainer of diesel engine systems immediately and causes engine troubles.<BR>For preventing engine troubles, "Protect mold and water solubilizer" being added in gas oil and controling mold slduge is necessary. It is more simple and econo mical. As follows, we state "Protect mold and water solubilizer" deveroped by our Company.

著者

戸田 伸一

出版者

The Japan Institute of Marine Engineering

雑誌

Marine engineering : journal of the Japan Institution of Marine Engineering = マリンエンジニアリング : 日本マリンエンジニアリング学会誌 (ISSN:13461427)

巻号頁・発行日

vol.47, no.3, 2012-05-01

著者

藤田 昌孝

出版者

The Japan Institute of Marine Engineering

雑誌

Marine engineering : journal of the Japan Institution of Marine Engineering = マリンエンジニアリング : 日本マリンエンジニアリング学会誌 (ISSN:13461427)

巻号頁・発行日

vol.46, no.5, pp.739-743, 2011-09-01

参考文献数

4

著者

ガロワ ジャック 栄家 達也

出版者

The Japan Institute of Marine Engineering

雑誌

日本舶用機関学会誌 (ISSN:03883051)

巻号頁・発行日

vol.22, no.12, pp.799-807, 1987

---

This paper shows that the new CODAD solusion using 4 engines and 2 propellers is interesting for a 2500 tons frigate, thanks to a new generation of diesel engines with low compression ratio and two stages turbo charging process (SEMTPielstick PA6BTC engines) and that the frigates up to 4500 tons and even 5000 tons can be built in the same way with the following advantages, that is, noise detection improved thanks to the elastic mounting of complete propulsion units, infrared detection improved, compact and independent propulsion units, very good survivability, narrow inlet and exhaust ducting, large flexibility of operation and large overhaul interval and easy maintenance on board by crew, etc..

著者

三輪 誠 三村 治夫 阿部 晃久 西尾 茂 武田 実

出版者

The Japan Institute of Marine Engineering

雑誌

Marine engineering : journal of the Japan Institution of Marine Engineering = マリンエンジニアリング : 日本マリンエンジニアリング学会誌 (ISSN:13461427)

巻号頁・発行日

vol.44, no.3, pp.470-476, 2009-05-01

被引用文献数

2

---

Pathogenic and fecal bacteria, such as Vibrio cholerae and Escherichia coli, possibly invade via seawater. This may expose marine engineers to an intrinsic risk of infection when they carry out routine maintenance. We therefore investigated, following the voyage, the seawater taken into a ship's engine-room. As for the populations, they varied from 102.9 to 105.9 colony-forming units (cfu) ml-1. A correlation coefficient between the population and the in situ seawater temperature was 0.71, 0.30, and 0.068 for the samples taken from calls facing to the ocean (n = 6), the Inland Sea (n = 12), and the coastal area around the Pacific Ocean (n = 16), respectively. An occupational ratio of Vibrio sp. population increases when the seawater was retained for more than three months in the condensers for the air conditioner and the drain cooler. Although three strains were detected from the drain cooler, those of which had ability to make yellow-colored colonies on a selective plate at 37°C and left for 6 months. It was identified as to be Aerococcus viridans. In that species, the lobster pathogen is included, but nothing human. So far examined is pathogenic V. cholerae, which was not detected in all the samples taken from the engine-room. These results indicate that the possibility of infection of marine engineers to be quite low when they do the maintenance on board in the coastal area and the Inland Sea of Japan

著者

猪熊 守彦

出版者

The Japan Institute of Marine Engineering

雑誌

日本舶用機関学会誌 (ISSN:03883051)

巻号頁・発行日

vol.33, no.2, pp.118-125, 1998-02-01

被引用文献数

1

著者

Qiusheng LIU Katsuya FUKUDA Takuma MATSUDA

出版者

The Japan Institute of Marine Engineering

雑誌

マリンエンジニアリング (ISSN:13461427)

巻号頁・発行日

vol.41, no.SI, pp.144-149, 2006-09-01 (Released:2010-05-31)

参考文献数

12

被引用文献数

5 4

---

Carbon dioxide (CO2) ocean sequestration technologies, such as dissolution into seawater, are important to mitigate global warming. In this study, solution processes of CO2 gas in seawater and pure water were experimentally studied under various pressures and temperatures to evaluate the solubilities of CO2 in seawater. The solubilities of CO2 in seawater and pure water were measured by a change in pressure due to absorption at pressures up to 30 MPa and the temperatures ranged from 4°C to 60°C. It was obtained that the solubilities of CO2 were between 0.27 × 10-3 and 1.26 × 10-3 in seawater, and between 0.26 × 10-3 and 0.6 × 10-3 in pure water near atmospheric pressure. The values increase with an increase in pressure, but decrease with an increase in temperature. The Henry's law constant of CO2 was about 105 MPa at a temperature of 4°C in seawater under atmospheric pressure, and increased with an increase in temperature. The solubility of CO2 in seawater was lower than that in pure water. Empirical correlations for solubilities of C02 in seawater and pure water at various temperatures under atmospheric pressure were obtained based on the experimental data.

著者

段 智久 橋本 正孝 浅野 一朗 中村 卓朗

出版者

The Japan Institute of Marine Engineering

雑誌

マリンエンジニアリング (ISSN:13461427)

巻号頁・発行日

vol.41, no.3, pp.438-443, 2006-05-01 (Released:2010-05-31)

参考文献数

6

被引用文献数

1

---

Dimethyl Ether (DME) was mixed with waste vegetable oil to improve combustion and exhaust emissions in a high speed diesel engine. Past research has shown that the properties of DME, such as lower boiling point and higher cetane number, would affect atomization process and combustion progress of DME/Marine diesel oil blending fuel. In this study, the effect of mixing DME with waste vegetable oil was investigated by using the 4-stroke single cylinder direct injection diesel engine. The combustion pressure history, injection pressure, exhaust gas emissions were measured in variation with mixing ratio of DME and engine load. The emissions of smoke and nitrogen oxide were found to reduce with increase in mixing ratio of DME.

著者

段 智久 橋本 正孝 浅野 一朗 山縣 正史

出版者

The Japan Institute of Marine Engineering

雑誌

マリンエンジニアリング (ISSN:13461427)

巻号頁・発行日

vol.39, no.6, pp.409-414, 2004-06-01 (Released:2010-05-31)

参考文献数

2

---

We improved the system of a high-speed single-acting 4-stroke diesel engine to allow it run on a mixed fuel comprised of A-heavy oil and DME (Di-Methl Ether), fuel components that discharge no soot, no SOx, and little NOx in combustion. The combustion pressure, rate of heat release, exhaust gas components, and other conditions were measured in experiments using diesel oil, A-heavy oil, and the mixed fuel comprised of DME and A-heavy oil.As a result, the ignition timing was earliest with diesel oil, median with the mixed fuel, and latest with A-heavy oil. Mixed fuel discharged a slightly reduced level of NOx. Overall, results indicated that the engine would require further improvements before long-term operation became possible.

著者

曽禰 正夫

出版者

The Japan Institute of Marine Engineering

雑誌

日本舶用機関学会誌 (ISSN:03883051)

巻号頁・発行日

vol.16, no.2, pp.121-130, 1981

被引用文献数

1

---

To find out an optimum cycle of the ship bottom sweeping from the standpoint of service economics, an accurate increase in delivered horsepower due to the ship's bottom fouling was grasped and a statistical analysis was made referring to the deck logbook and the engineer's logbook in parallel with speed tests with actual vessels.<BR>Some findings are as follows: (1) Values measured in speed tests before and after docking under conditions of 6200 tonne dwt and a given speed revealed that the annual increase in delivered horsepower due to the ship bottom fouling would be about 1000PS. (2) Variations in a decade, taking the initial service as the original point, both in delivered horsepower and in fuel consumption was at between about 10 and 15% increase.

著者

Dhimas W. Handani I Made Ariana Taufik F. Nugroho Fadilla Indrayuni

出版者

The Japan Institute of Marine Engineering

雑誌

マリンエンジニアリング (ISSN:13461427)

巻号頁・発行日

vol.53, no.3, pp.386-391, 2018-05-01 (Released:2018-05-19)

参考文献数

9

被引用文献数

1 3

---

Ship exhaust gas emission becomes one of the main sources of marine environment pollution. This imposes significantly on the health risk along the area which has densely traffic of ship. The aim of this paper is to conduct an estimation of emission distribution of ships in the Madura Strait which is one of the busiest access channels in Indonesia. Vessel activity based approach is utilized for estimating the emission of ships by inputting the power of main engine (ME), auxiliary engine (AE) and auxiliary boiler(AB), engine load factor, time in mode and emission factor. Operation mode of ships are categorized as maneuvering, fairway cruising, low cruising and hoteling. Automatic Identification System (AIS) is used to identify all data of ships which are operated in the Madura Strait both the static and dynamics data. The static data includes MMSI (Maritime Mobile Service Identity), IMO number, type of ship, call sign and ship dimension, while dynamics data such as ship speed, position and navigation status. Ship information from AIS is used as input for ship database for knowing the engine power, actual and design speed which are needed to estimate the ship emission, including carbon monoxide (CO), Nitrogen oxides (NOX), sulfur oxides (SOX) and particulate matter (PM). In this study, ships operation data obtained from AIS and the emission estimation are combined to do a simulation using Hybrid Single Particle Lagrangian Integrated Trajectory (HYSPLIT) Model to generate emission map which shows the inventory of emission distribution. Result shows that the emission of SO2 and NOX are much higher than the other pollutant. The total emission of AE is higher than that of ME because most of ships are in the mode of hoteling. The dispersion model reveals that the pollutant reaches location of resident around the Madura Strait. Output of this study can be used as consideration for the government to regulate an effective policy regarding the ships emission to control the marine pollution at sea for better environmental health.

著者

柴田 陽三 藤永 隆志

出版者

The Japan Institute of Marine Engineering

雑誌

マリンエンジニアリング (ISSN:13461427)

巻号頁・発行日

vol.37, no.9, pp.647-653, 2002-09-01 (Released:2010-05-31)

参考文献数

9

---

The lack of power source capacity is one of the most fatal problems for the AUV spotlighted as a means of underwater survey and observation of the next generation, to be attacked for its practical use. To be free from such a problem, some long-term-cruising-AUVs employ with a large capacity power source like a closed cycle diesel engine or a fuel cell. On the other hand, if underwater recharging system for conventional batteries is developed, that will help us make the AUVs more practical without increasing its size, weight and cost. And such a new method of the AUV can be expected that the AUV is operated in combination with underwater bases or large submersibles.Now, we have carried out to develop such an AUV, called“MARINEBIRD”, that is capable of docking in an underwater station and recharging the battery. This kind of technologies have already been underwatertested in the U.S.A. and European countries, but our newly developed AUV is based on our original mechanism for docking, different from such ones.The MARINEBIRD succeeded the docking test in the dock trial, and demonstrated the excellence of its autonomous docking capability.The MARINEBIRD has the big advantage of charging batteries and receiving data at the underwater base without recovery by the surface support ship or such purposes as required in combination with a larger submersible, that will contribute to increase efficiency in underwater survey.

著者

西村 章広 脇坂 知行

出版者

The Japan Institute of Marine Engineering

雑誌

マリンエンジニアリング (ISSN:13461427)

巻号頁・発行日

vol.40, no.2, pp.266-272, 2005-03-01 (Released:2010-05-31)

参考文献数

15

被引用文献数

1

---

A diesel fuel breakup model was developed in the framework of the three-dimensional fluid dynamics code KIVA-3V and validated with experimental data. This breakup model accounts for cavitation bubble collapse energy, turbulent kinetic energy, and aerodynamic forces on the liquid core. The primary breakup time is computed by a balance between surface tension of the liquid core and the breakup forces obtained as aerodynamic force and breakup force based on cavitation bubble collapse. The calculated diameter of the child droplet is based on the liquid core surface wavelength, which is caused by fluctuating turbulence velocities. At the time of primary breakup, a child droplet uses its turbulent energy to determine the ensuing trajectory. Hence, the proposed Cavitation Bubble Collapse Energy Breakup (CEB) model is capable of predicting the spray cone angle. Generation of child droplets as a result of primary breakup continues until all cavitation bubbles have totally collapsed. Subsequently, the Taylor Analogy Breakup (TAB) model is used for secondary droplet breakup. Model predictions of spray tip penetration, spray cone angle, and Sauter Mean Diameter (SMD) have been found in good agreement with experimental data for non-evaporating sprays under high injection pressure.