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首页> 外文期刊>Energy Conversion & Management >Combustion performance and emission characteristics of a diesel engine under low-temperature combustion of pine oil-diesel blends
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Combustion performance and emission characteristics of a diesel engine under low-temperature combustion of pine oil-diesel blends

机译：松油柴油混合物低温燃烧下柴油机的燃烧性能和排放特性

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Pine oil is a biofuel derived from pine trees; its cetane number, kinematic viscosity, and boiling point are lower than those of diesel. Because of its inherent oxygen content, high calorific value, and good solubility, pine oil is considered as a potential alternative of diesel. In this work, we investigated the combustion and emission characteristics of pine oil-diesel blends in a high-speed four-cylinder turbocharged diesel engine under different loads and exhaust gas recirculation (EGR) rates. Four fuels, diesel blended with pine oil in proportions of 0%, 20%, 40%, and 50% (named as P0, P20, P40, and P50, respectively), were tested. The results show that when the load ranged from 40% to 100%, the equivalent brake specific fuel consumption (BSFC) of P50 was only 2.08-3.5% higher than that of P0, whereas that of P20 was <1% than pure diesel. The addition of pine oil to diesel decreased the soot emission, but NOx emission increased. For pine oil-diesel blends, with the increase in the EGR rate from 0 to 24.6%, the variations in the soot, CO, and THC emissions were not obvious, whereas the NOx emissions significantly decreased. Under the same EGR rate, with the increase in the proportion of pine oil, the NOx emissions increased; the effects of an increase in the EGR rate on the NOx emissions were higher than an increase in the pine oil fraction in the blend. When the EGR rate exceeded 24.6%, the soot, CO and, THC emissions sharply increased. However, it is possible to significantly reduce the soot emissions at a high EGR rate by increasing the blend proportion of pine oil. (C) 2016 Elsevier Ltd. All rights reserved.
机译：松油是从松树中提取的生物燃料。十六烷值，运动粘度和沸点均低于柴油。由于其固有的氧含量，高热值和良好的溶解性，松油被认为是柴油的潜在替代品。在这项工作中，我们研究了高速四缸涡轮增压柴油机中松油柴油混合物在不同负载和废气再循环（EGR）速率下的燃烧和排放特性。测试了四种燃料，柴油与松油的混合比例为0％，20％，40％和50％（分别命名为P0，P20，P40和P50）。结果表明，当负载在40％至100％范围内时，P50的等效制动比燃油消耗（BSFC）仅比P0高2.08-3.5％，而P20的制动比燃油消耗小于纯柴油的1％。向柴油中添加松油可减少烟尘排放，但增加NOx排放。对于松油-柴油混合物，随着EGR率从0增加到24.6％，烟尘，CO和THC排放量的变化并不明显，而NOx排放量则明显减少。在相同的EGR率下，随着松油比例的增加，NOx排放量增加； EGR率增加对NOx排放的影响大于掺混物中松油馏分的增加。当EGR率超过24.6％时，烟尘，CO和THC排放量急剧增加。但是，可以通过增加松油的混合比例来显着减少高EGR率下的烟尘排放。 （C）2016 Elsevier Ltd.保留所有权利。

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