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Use of Diesel Engine and Surface-Piercing Propeller to Achieve Fuel Savings for Inshore Fishing Boats

Journal of Marine Science and Application 2016年第2期15卷 214-221页

作者： Ismail Zainol omar yaakob Universiti Kuala Lumpur Malaysian Institute of Marine Engineering Technology 32200 Lumut Perak Malaysia Marine Technology Centre Universiti Teknologi Malaysia 81310 SkudaL Johor Malaysia Faculty of Mechanical Engineering Universiti Teknologi Malaysia 81310 Skudai Johor Malaysia

Fishing is a major local industry in Malaysia, particularly in rural areas. However, the rapidly increasing price of fuel is seriously affecting the industry＇s viability. At present, outboard petrol engines are the preferred choice for use in small-scale fishing boats because they deliver the advantages of high speed and low weight, they are easy to install, and they use minimal space. Petrol outboard engines are known to consume a greater amount of fuel than inboard diesel engines, but installing diesel engines with conventional submerged propellers in existing small-scale fishing boats is not economically viable because major hullform modifications and extra expenditure are required to achieve this. This study describes a proposal to enable reductions in fuel consumption by introducing the combined use of a diesel engine and Surface-Piercing Propeller （SPP）. An analysis of fuel consumption reduction is presented, together with an economic feasibility study. Resulting data reveal that the use of the proposed modifications would save 23.31 liters of fuel per trip （40.75%） compared to outboard motors, equaling annual savings of RM 3962 per year.

关键词： inshore fishing fuel saving surface-piercing propeller propulsion diesel engine

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Satellite-Based Offshore Wind Energy Resource Mapping in Malaysia

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Journal of Marine Science and Application 2019年第1期18卷 114-121页

作者： Abdul Alif Ahmad Zaman Farah Ellyza Hashim omar yaakob School of Mechanical Engineering Faculty of EngineeringUniversiti Teknologi Malaysia Marine Technology Center Universiti Teknologi Malaysia

Development and application of offshore wind turbine farms have been increasing, particularly in the developed countries,because of their high power rating, high yield energy, high offshore wind, and unlimited space in the offshore. However, the poor data and simplistic methodologies of the previous assessments result in insufficient estimates of the wind energy ***, this study provides an assessment of the offshore wind energy resources in Malaysia using multi-mission satellite altimetry data. The satellite altimetry data was extracted from Radar Altimeter Database Systems located at GNSS and Geodynamics Laboratory, Universiti Teknologi Malaysia. The data were validated by buoy measurements from two offshore sites, as indicated by the high correlation coefficient of 0.88. Further, the offshore wind energy resource mapping data in Malaysia identified three areas in Peninsular Malaysia and Borneo as potential areas for offshore wind energy development.

关键词： Wind energy Offshore wind Renewable energy Assessment Satellite altimetry Malaysia

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Experimental Investigation of a Hydraulic Turbine for Hydrokinetic Power Generation in Irrigation/Rainfall Channels

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Journal of Marine Science and Application 2021年第1期20卷 144-155页

作者： Aly Hassan Abdelbaky Elbatran omar B.yaakob Yasser M.Ahmed Faculty of Engineering Arab Academy for Science and Technology and Maritime TransportAlexandria 1029Egypt Faculty of Mechanical Engineering Universiti Teknologi Malaysia81310 SkudaiJohorMalaysia Marine Technology Center Universiti Teknologi Malaysia81310 SkudaiJohorMalaysia Department of Naval Architecture and Marine Engineering Faculty of EngineeringAlexandria UniversityAlexandriaEgypt

The development of microchannels with open flow for use in irrigation and rainy areas is challenged by electricity generation via hydrokinetic devices in shallow and low velocity *** hydrokinetic turbines are known to be highly dependent on current speed and water *** drawback of conventional turbines is their low *** shortcomings lead to the need to accelerate the flow in the channel system to enhance the extracted *** method of deploying a novel turbine configuration in irrigation channels can help overcome the low performance of conventional hydrokinetic ***,this study experimentally presents a bidirectional diffuser-augmented channel that includes dual cross flow/Banki *** show that the maximum efficiency of the overall system with two turbines is nearly 55.7%.The efficiency is low relative to that of hydraulic ***,the result can be considered satisfactory given the low head of the present *** use of this system will contribute to a highly efficient utilization of flows in rivers and channels for electrical energy generation in rural areas.

关键词： Irrigation channels Cross flow turbine(CFT) Bidirectional diffuser-augmented(BDA) Tidal current Flow characteristics Efficiency

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