Engine performance and emission characteristics of microwave-produced biodiesel blends

IF 1.1 4区工程技术 Q4 THERMODYNAMICS

Thermal Science Pub Date : 2023-01-01 DOI:10.2298/tsci230603205h

Fakher Hamdi, Ilhem Yahya, Mehrez Gassoumi, Aliya Fazal, Ridha Ennetta, Serhad Soyhan

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引用次数: 0

Abstract

The main objective of this research is to investigate, experimentally, the effects of biodiesel blends on the performance and emissions of a diesel engine. Measurements were carried out on a single-cylinder, four-stroke, and air-cooled compression-ignition engine, under half and full load conditions. Engine speed was varied from 1000 to 3000 rpm. Biodiesel was produced by transesterification process of sunflower oil with ethanol, using microwave-assisted heating reactor. Three biodiesel-diesel mixtures: containing 5%, 10% and 20% by volume of biodiesel, respectively, have been tested and compared to pure diesel fuel. The effects of these biodiesel blends on the engine operating characteristics such as brake specific fuel consumption, brake power, brake thermal efficiency, brake mean effective pressure and on carbon monoxide, carbon dioxide and nitrogen oxides emissions, have been investigated. It was noticed that, at full load, the specific fuel consumptions of biodiesel blends were higher compared to the pure diesel fuel, but no change was observed under 1/2 load. An improvement in the brake thermal efficiency, under 1/2 load, was obtained, but at full load, for medium and high-speed, the thermal efficiencies of all biodiesel blends showed a decrease compared to pure diesel fuel. Concerning pollutants emissions, a decrease in carbon monoxide emissions of all biodiesel blends was noticed. The best result in carbon monoxide emissions was achieved by the mixture containing 10% by volume of biodiesel with an average reduction value close to 40%. In addition, a significant reduction in nitrogen oxides emissions was observed for the three biodiesel blends.

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微波生产生物柴油混合物的发动机性能和排放特性

本研究的主要目的是通过实验研究生物柴油混合物对柴油发动机性能和排放的影响。测量是在一台单缸、四冲程、气冷压缩点火发动机上进行的，在半负荷和满载条件下进行的。发动机转速从1000转到3000转不等。以葵花籽油为原料，采用微波加热反应器，以乙醇为原料进行酯交换反应制备生物柴油。三种生物柴油-柴油混合物分别含有5%、10%和20%的生物柴油，并与纯柴油进行了测试和比较。研究了生物柴油混合物对发动机运行特性的影响，如制动比油耗、制动功率、制动热效率、制动平均有效压力以及对一氧化碳、二氧化碳和氮氧化物排放的影响。注意到，在满载时，混合生物柴油的比燃料消耗高于纯柴油，但在1/2负荷下没有观察到变化。在1/2负荷下，获得了制动热效率的改善，但在满载时，对于中速和高速，所有生物柴油混合物的热效率与纯柴油相比都有所下降。在污染物排放方面，注意到所有生物柴油混合物的一氧化碳排放量都有所减少。一氧化碳排放的最佳结果是含有10%生物柴油的混合物，平均减少值接近40%。此外，观察到三种生物柴油混合物的氮氧化物排放量显著减少。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Thermal Science 工程技术-热力学

CiteScore

2.70

自引率

29.40%

发文量

399

审稿时长

5 months

期刊介绍： The main aims of Thermal Science to publish papers giving results of the fundamental and applied research in different, but closely connected fields: fluid mechanics (mainly turbulent flows), heat transfer, mass transfer, combustion and chemical processes in single, and specifically in multi-phase and multi-component flows in high-temperature chemically reacting flows processes present in thermal engineering, energy generating or consuming equipment, process and chemical engineering equipment and devices, ecological engineering, The important characteristic of the journal is the orientation to the fundamental results of the investigations of different physical and chemical processes, always jointly present in real conditions, and their mutual influence. To publish papers written by experts from different fields: mechanical engineering, chemical engineering, fluid dynamics, thermodynamics and related fields. To inform international scientific community about the recent, and most prominent fundamental results achieved in the South-East European region, and particularly in Serbia, and - vice versa - to inform the scientific community from South-East European Region about recent fundamental and applied scientific achievements in developed countries, serving as a basis for technology development. To achieve international standards of the published papers, by the engagement of experts from different countries in the International Advisory board.