Ignition mechanism analyzed through transient species measurements and its correlation with O-D and 3-D simulations for PRF and toluene n-heptane mixture

No abstrac

オクタン価基準燃料とトルエン/ノルマルヘプタン混合燃料における、過渡的成分計測および、０次元と３次元のｼﾐｭﾚｰｼｮﾝとの相関による、着火機構の検討

富山大学・富理工博甲第102号・MOHD ADNIN BIN HAMIDI・2016/03/23富山大学201

Experimental investigation of a diesel engine using waste plastic oil blends

Plastic have now become essential materials in the present world and implimentation in the industrial field is persistently rising. The aim of this project is to investigate the effects of waste plastic oil on engine performance and pollutant emissions. The engine test was conducted under constant engine speed of 1800 RPM and varies engine load of 20%, 40% and 60% respectively. The performances of engine were analyzed in term of brake power (BP), brake specific fuel consumption (BSFC) and brake thermal efficiency (BTE). The effect of WPO on brake power was only dominant during low and medium engine load condition. WPO can reduce the BSFC of diesel engine except for high load condition. In addition, the formation of NOx and CO for WPO fuel blends were greater than D100 under all engine load conditions. Therefore, in conclusion, the implementation of WPO in diesel engine can improve engine performance but limit its effectiveness in terms of pollutant emissions

Study of engine performance, emission and combustion of reactivity controlled compression ignition (RCCI) mode engine

Based on research and sufficient evidence, the International Agency for Research on Cancer (IARC), which is part of the World Health Organization (WHO), classified exhaust gas from diesel engines as carcinogenic to humans (Group 1), which has been a factor in the worldwide increase in cancer lung cases. According to the preceding remark, this will become an issue for all diesel transportation, from the smallest, such as a generator used in a night market, to the largest, such as trains. To address this issue, many researchers and scientists study the diesel engine in order to ensure that this internal combustion engine improves in terms of emissions while maintaining performance and fuel efficiency. The diesel engine is known as a combustion that has a thermal efficiency of more than 45%. The most recent technique to reducing gas emissions from diesel engines is to modify the injection system to use dual-fuel Reactivity Control Compression Ignition (RCCI) with main reference fuel (PRF). The study on the RCCI technique shows that it can achieve low NOx and CO2 emissions while retaining the high performance of a diesel engine. To minimise HC and CO emissions, the future proposal for this method is to regulate the combustion phasing by regulating the injection at the port injector

Sustainable biofuels from first three alcohol families : A critical review

With its unique qualities, such as infinite supply, high octane number, and capacity to cut greenhouse gas emissions, alcohol is a viable alternative fuel for SI engines. This review article aims to reveal to readers the effects of alcohol on the performance, combustion behavior, and emission characteristics of SI engines by collecting the outcomes from previous research. This article looks at methanol, ethanol, and butanol fuel qualities. The performance of SI engines with butanol, ethanol, and methanol combined with gasoline is investigated in terms of brake torque, brake power, fuel consumption, thermal efficiency, volumetric efficiency, mean effective pressure, and coefficient of variation under various conditions. Second, in-cylinder pressure, mass fraction burnt, ignition delay, pressure increases, and heat release rates are also used to evaluate the combustion characteristic. Finally, the article discusses pollutant emissions such as CO, CO2, NOx, UHC, and exhaust gas temperature. Methanol, ethanol, and butanol mixed with gasoline increased fuel consumption and lowered spark-ignition engines’ thermal efficiency. When alcohol was combined with gasoline, most research found that CO, NOx, and UHC emissions were reduced due to improved combustion

A prediction of graphene nanoplatelets addition effects on diesel engine emissions

There are numerous methods for reducing diesel exhaust emissions. Engine modifications, combustion optimization, and exhaust gas treatment are all popular methods. Another proven method uses fuel additives, such as zinc oxide, copper oxide, and magnesium oxide. Those additives are proven to reduce measured emissions such as carbon monoxide and nitrogen oxide successfully; however, there are still concerns about the toxicity of the emissions, which could harm human health. As a result, carbon nanoparticles have been introduced as a fuel additive due to their low risk to human health. Because of advancements in graphene research, a few researchers began investigating the implications of using graphene nanoplatelets as a fuel additive. The study’s findings appeared to be encouraging. However, no additional research has been identified to forecast the impact on engine emissions other than analyzing the effects of graphene additives on engine emissions. The goal of this study is to forecast the effects of graphene nanoplatelets on diesel engine emissions. The emission parameters of the trial were carbon monoxide, carbon dioxide and nitrogen oxide. The factors considered in the experiment are speed, load, and blend concentration. Response surface methodology and contour plots were generated using Minitab software. The results show that the prediction model’s accuracy is within 10% of the experimental data

Reliability, availability, maintainability and safety (rams) in railway’s assurance system and implementation challenges : A Review

RAMS forms an integral part of railway’s system assurance. It integrates reliability engineering, availability or performance calculation, maintenance strategies and system safety. While RAMS is widely implemented in other industries like petroleum, aviation and chemical, the practice in railway is relatively new. RAMS task needs to be implemented from earliest phase of system design, tendering, project execution, operation up to decommissioning. Due to its compulsory extensive involvement of railway personnel as well as authorities, RAMS is not being fully utilized as an assurance tool in railway industry. This paper will introduce the core components of RAMS and their stakeholder

Stability analysis of multirotor drone with water jet payload

Multirotor stability is achieved when all rotors generate equal trust to stay hovering and throttle mode. It's required the control system algorithm for propulsion speed adjustment, which is related to translational vector and rotation angle. Even with external disturbance, control system algorithm can adjust tilting angle to stabilize quadcopter. Therefore, this study focuses on developing quadcopter with waterjet system and datalogging to analyse the flight stability. It is developed with quadcopter configuration and integrating waterjet nozzle as a payload. The process includes frame development, propulsion sizing, speed calibration for each rotor, trim calibration, and a proportional integral derivative (PID) control tuning. For data collecting, copter is equipped with data storage to store flight log in form off log file. Quadcopter is test flight outdoor to embraced wind factor. The data logger shows quadcopter tilting at certain angle cause by external forces created by waterjet

Comparison of PRF and toluene/n-heptane mixture in the mechanism of compression ignition using transient species measurements and simplified model analysis

A heat engine is known as a mechanical system that uses thermal energy came from combustion and changes it into mechanical energy. An easy definition is that, a heat engine changes thermal energy into mechanical energy that can help us in daily life. A heat engine can be defined as external combustion engines and internal combustion engines by the method of heating the working fluid. An internal combustion engine gets the energy directly using heat energy generated by the combustion in the interior of the working fluid. On the other hand, an external heat engine is a heat engine where an (internal) working fluid is heated by combustion in an external source, through the engine wall or a heat exchanger. The fluid then, by expanding and acting on the mechanism of the engine, produces motion and usable work. The fluid is then cooled, compressed and reused (closed cycle), or (less commonly) dumped, and cool fluid pulled in (open cycle air engine)