A study of emission characteristic, deposits, and lubrication oil degradation of a diesel engine running on preheated vegetable oil and diesel oil

Self Cite

One of the important researches on fuel use in diesel engines is the basic study of deposits formation in engine combustion chambers. The process of creating deposits in the engine combustion chamber is a complex phenomenon causing many different problems. Therefore, it is necessary to study the mechanism of deposits formation and development in engine combustion chamber when using traditional diesel or biodiesel. The study of combustion chamber deposits in internal engines was conducted to understand the effects of deposits on the engine and how they were formed and developed. Most of the current studies on deposits are carried out using statistical results from vehicle's engines. Testing on real engines requires a long time and long distance travel, which makes the cost of both tests very high, causes damage to the engine during deposits testing. Studying and finding a simpler, more cost-effective experimental model that meets the requirements of the deposits formation testing and assessing the factors that make up them are essential. An experimental model design to determine the formation mechanism of deposits in the combustion chamber is the key point of the paper. This study clarifies the deposits formation of fuel in the engine by using a method called a heated surfaces deposits formation testing (HSDFT) and simulate the accumulation and development of deposits in combustion chamber. This model will help researchers to initially build the database effectively to determine the deposits formation mechanism in the combustion chamber of diesel engines when using different fuel.

Section: Introductionmentioning

confidence: 99%

Research and Design an Experimental Model for the Determination of Deposits Formation Mechanism in the Combustion Chamber

Pham

2019

Self Cite

“…It is worth mentioning that VO has a much higher kinematic viscosity (µ), higher density and lower evaporation compared to DF [10], [11]. Considering in mind, mixing ULSD (low density) and VO (high density) will result in a mixture with suitable physical properties for the use in diesel engines [12].…”

Section: Introductionmentioning

confidence: 99%

Experimental Analysis on the Ultrasound-based Mixing Technique Applied to Ultra-low Sulphur Diesel and Bio-oils

Hoang

Tran

2019

Self Cite

Pollution in the maritime field is considered as such a serious problem that scientists, policymakers, and managers are always urged with a desire to find solutions and strategies one way or another to minimize its negative impacts on the environment and the life. Among the effective solutions, the use of fuels with limited-sulfur content or bio-based fuels has been paid much attention to due to their advantages in the use of marine diesel engines. In the current study, a type of fossil diesel fuel with ultra-low sulfur content (ULSD) was mixed with coconut oil (CO) through the ultrasonic treatment under the changes in volume fraction of as-used fuels, the correlation on viscosity selected the rate mixing between ULSD and coconut oil. After 12 minutes of ultrasound treatment, the highest stability of the ULSD-CO emulsion was achieved correspondingly to 97.8% for a mixing rate of 76%(ULSD):24%(CO) along with the distance of 85mm from the containing-vessel bottom to the ultrasound horn tip. Moreover, the spray characteristics including penetration length and a cone angle of ULSD, CO, and ULSD-CO emulsion were also examined and compared to diesel fuel. The similarity of spray characteristics to diesel fuel, containing ultra-low sulfur content and oxygen content, renewability are considered as some advantages of ULSD-CO emulsion as used for diesel engines aiming to meet the stricter requirements of IMO regulations about the strategies of environmental protection.

“…Vietnam fleet capacity is developed gradually by improving the propulsion plant system. Solutions for "green shipping" include (1) Improving engine efficiency and power by improving fuel injection systems [11], [12] and efficiently utilizing waste heat [13]; (2) Reduce emissions causing environmental pollution by effectively using alternative fuels such as biofuels [14].…”

Section: Introductionmentioning

confidence: 99%

Critical Information for Vietnamese Economy Aiming at a Strategic Breakthrough as Approaching the Industry 4.0

Pham¹

2019

Chances, and challenges always are created in the fourth industrial revolution that has never faced in the past. Changing and renewing are necessary unless enterprises will come out of "playground" of the fourth industrial revolution. Currently, the navigational field, which has not been outside the "playground", has suffered from numerous challenges. Although the possible advantages of marine industry only include the seaport system and government support, the challenges and barriers are the majority. Labor, database management, digital technologies, infrastructures, investment, and customer's attractions are the existent trials of the maritime field. Improvement and renewing the educational program are compulsory. Furthermore, managing the database effectively is not easy. In Vietnam, the lack of synchronous infrastructures is also the enormous challenges of all industries in general and navigational field in particular. Moreover, the investment and customer attractions play the primary role to exist in the revolution. Some of the aspects of the maritime major in the fourth industrial revolution will be mentioned in the article. Also, supporting from Vietnam government as well as current challenges are thoroughly presented and analyzed to find the solutions for approaching the Industry 4.0. Among emerging challenges, the investment attraction, infrastructures, labor, database management, modern digital technology, and customer attraction may be considered as critical information for Vietnamese economy. Importantly, the challenges are analyzed to reveal that if these challenges can be transformed into the motivations, gaining achievements in 4.0 industrial revolution is not difficulty. Keywords-critical information; 4.0 industrial revolution; navigational field; the maritime industry.