PHD dissertation sumary: Research on the use of ULSD biodiesel fuel blend on marine diesel engines

Object and scope: Small ship diesel engines with the range of power from 50 hp to 100 hp; traditional diesel fuel with 0.05% sulfur content, ULSD with 0.001% sulfur content, and Biodiesel originated from coconut oil; fabrication of ultrasonic wave-based equipment/system to produce homogeneous fuel blend;fuel supply system, exhaust system, and control and test system of the engine; testing equipment for engine power and emissions parameters.
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PHD dissertation sumary: Research on the use of ULSD biodiesel fuel blend on marine diesel enginesMINISTRY OF EDU. & TRAINING MINISTRY OF TRANSPORT HO CHI MINH CITY UNIVERSITY OF TRANSPORT TRAN VIET DUNGRESEARCH ON THE USE OF ULSD-BIODIESEL FUEL BLEND ON MARINE DIESEL ENGINES Speciality: Mechanical Engineering Code: 9520116 Supervisors 1: Assoc. Prof. Dr. Hoang Anh Tuan Supervisors 2: Prof. Dr. Le Anh Tuan PHD DISSERTATION SUMARY HO CHI MINH CITY - 2021This dissertation was completed at Ho Chi Minh City University of TransportSupervisors 1: Assoc. Prof. Dr. Hoang Anh TuanSupervisors 2: Prof. Dr. Le Anh TuanReviewer 1:Reviewer 2:Reviewer 3:This dissertation will be defended before the Dissertation Evaluation Councilmeets at Ho Chi Minh CityUniversity of Transport at .....hours.......minute,date........................................................, 2021.This dissertation can be found at the library: - Library of Ho Chi Minh City University of Transport; - Nationnal Library of Viet Nam. 1 INTRODUCTIONUrgency The International Maritime Organization (IMO) mandated the use of ultra-lowsulfur diesel (ULSD) fuel in shipping from January 1, 2020. Compliance with thenew regulation on sulfur content in the fuel used for ships when ships operate inan emission control area can be achieved by using fuel with a sulfur content of0,0015% at all times of ship operation or switching from high-sulfur fuel to0,0015% sulfur fuel when the ship enters an emission control area. Fuel switching during the ship operation can present a number of problemsrelated to fuel characteristics such as viscosity, lubricity, flash point, combustionquality. Therefore, for ships using ULSD fuel, it is necessary to equip a coolersystem to overcome the disadvantage of ultra-low viscosity like ULSD. Due to this reason, the combination of two fuel types such as ultra low-viscosity ULSD and high-viscosity Biodiesel (BO) fuel aiming to form a new fueltype, which satisfies not only the required viscosity and renewable properties butalso the requirement of reducing the cost of ship operation will have a greatsignificance in terms of economy, technology and emissions. However, thehomogeneity of the fuel after mixing is found to depend mainly on the mixingmethod. Currently, mechanical fuel mixing technologies have been being mainly used,indicating that the quality of mixed fuel only stands at an acceptable level as wellas the mixing time is quite long. Meanwhile, using ultrasonic waves to createshocks from the bubbles appearing within the 2 liquid phases is considered as apotential solution to improve the homogeneity of the 2 liquid-phase blend such asULSD fuel and Biodiesel. Based on the above-mentioned reasons, the method of using ultrasonic waveshas been chosen to mix ULSD and Biodiesel fuels to produce a homogeneous fueltype with some properties similar to traditional diesel fuel for the using purposefor ships aiming to meet IMO regulations, to reduce operating costs, and to protectthe environment. 2 Therefore, the issue of Research on the use of ULSD-Biodiesel fuel blendon marine diesel engines was selected as a novel topic in this doctoraldissertation. Goals - Overview on solutions of using ULSD fuel for marine diesel engines; - Research, design, and fabrication of equipment/system using ultrasonic wavesto produce homogeneous fuel blend of ULSD and Biodiesel; - Carrying out experimental studies to evaluate the techno-economic aspects,and emission and combustion characteristics, and performance parameters of amarine diesel engine when using the homogenous fuel blend of ULSD-Biodieselas an alternative fuel. Object and scope - Small ship diesel engines with the range of power from 50 hp to 100 hp; - Traditional diesel fuel with 0.05% sulfur content, ULSD with 0.001% sulfurcontent, and Biodiesel originated from coconut oil; - Fabrication of ultrasonic wave-based equipment/system to producehomogeneous fuel blend; - Fuel supply system, exhaust system, and control and test system of the engine; - Testing equipment for engine power and emissions parameters.Methodology - Theoretical research methods on the breakup mechanism of molecularstructure by ultrasonic waves with experimental studies on determining therelationship between ultrasonic power and wavelength were applied; - Updated models associated with the fuel injection, mixture formation, andcombustion in diesel engines as using ULSD-Biodiesel homogenous fuels inorder to evaluate the influence of ULSD-Biodiesel homogenous fuels on theeconomic and technical parameters of the tested diesel engine were studied; - The experimentally controlled method to evaluate the impact of switchingmarine diesel engines using ULSD-Biodiesel homogenous fuels on the economicand technical parameters compared to the case of using traditional diesel fuel wasused. In addition, The injection characteristics of ULSD-Biodiesel homogenous 3fuels were also performed as a basis for explaining the process of fuel-air mixtureformation, combustion, and emissions.Scientific and practical significance Scientific significance The results obtained from this doctoral dissertation are considered as a reliablescientific basis and could be used as a good reference for research institutes anduniversities in the maritime field for teaching and researching the use of very lowsulfur fuel for marine diesel engines. Practical significance Combining ultra-low viscosity fuel (ULSD) with high-viscosity Biodiesel fuelto form a homogeneous blend with the require ...