Department of Mechanical Engineering, V V College of Engineering, Tirunelveli, 627657, India.
Department of Mechanical Engineering, Government College of Technology, Coimbatore, 641013, India.
Environ Sci Pollut Res Int. 2019 Feb;26(4):3436-3446. doi: 10.1007/s11356-018-3830-0. Epub 2018 Dec 4.
For heavy duty applications like power generation and transportation, the best option is the compression ignition engines, but the major concerns are the rising prices and environmental issues due to the rapid depleting sources of conventional fossil fuels. The present investigation is to study the performance and emission characteristics of a single cylinder four-stroke, air-cooled direct injection diesel engine runs with an alternate fuel as waste high density polyethylene plastic oil (HDPE) obtained by catalytic pyrolysis. At constant speed, test fuels have been experimented successfully to determine the engine performance such as brake thermal efficiency, brake specific energy consumption, and exhaust gas emissions such as carbon monoxide, carbon dioxide, oxides of nitrogen, and unburned hydrocarbons. The result shows that the brake thermal efficiency is lower at all load conditions when compared to diesel fuel whereas the brake specific energy consumption decreases with increase in engine load and increases with increase in waste plastic oil blend ratio. CO emission increases and NO emission level decreases with enhancement in engine load whereas the NO emission and CO emission augments with increase in waste plastic oil blend percentage. But in case of NO emission increase in concentration of waste plastic oil with diesel leads to raise in emission level. By using thermal imager, the link between in-cylinder temperature and NO emission has been fixed. With the help of this course of action, it has been observed that in-cylinder temperature plays the major role in NO concentration.
对于发电和运输等重型应用，最佳选择是压缩点火发动机，但由于传统化石燃料的迅速枯竭导致价格上涨和环境问题是主要关注点。本研究旨在研究以废高密度聚乙烯塑料油（HDPE）为替代燃料的单缸四冲程风冷直喷式柴油机的性能和排放特性，该废 HDPE 是通过催化热解获得的。在恒速下，已成功试验了试验燃料，以确定发动机性能，如制动热效率、制动比能消耗和废气排放，如一氧化碳、二氧化碳、氮氧化物和未燃烧的碳氢化合物。结果表明，与柴油相比，在所有负荷条件下，制动热效率都较低，而制动比能消耗随着发动机负荷的增加而降低，并随着废塑料油混合比的增加而增加。CO 排放随着发动机负荷的增加而增加，而 NO 排放水平随着发动机负荷的增加而降低，而随着废塑料油混合百分比的增加，NO 和 CO 排放都会增加。但是，在废塑料油浓度增加导致排放水平升高的情况下，NO 排放会增加。借助热像仪，确定了缸内温度与 NO 排放之间的联系。通过这种行动过程，已经观察到缸内温度在 NO 浓度中起着主要作用。
