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Pressure Effect on the Speed of Sound of Waste Cooking Oil Biodiesel
Journal of Chemical & Engineering Data ( IF 2.0 ) Pub Date : 2022-09-22 , DOI: 10.1021/acs.jced.2c00473 Abel G. M. Ferreira 1 , Jaime B. Santos 2 , Judy Jalkh 2 , Saman Khalighi 1 , Pedro F. Cruz 3 , Rui M. M. Brito 3
Journal of Chemical & Engineering Data ( IF 2.0 ) Pub Date : 2022-09-22 , DOI: 10.1021/acs.jced.2c00473 Abel G. M. Ferreira 1 , Jaime B. Santos 2 , Judy Jalkh 2 , Saman Khalighi 1 , Pedro F. Cruz 3 , Rui M. M. Brito 3
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The knowledge of speed of sound for biodiesel mixed with diesel at high pressures and in a wide range of temperatures is important for optimizing the injection process in diesel engine operation. The experimental speed of sound data in the literature about biodiesel is scarce. For that reason, the authors tried to evaluate the influence of temperature and pressure on the speed of sound of used cooking oil biodiesel (UCO) over the temperature range of 303–343 K and pressure varying from atmospheric up to 25 MPa. For that purpose, an acoustic cell with two ultrasonic probes working in through-transmission was used for speed of sound measurement. The uncertainty for the measurements was estimated as 1.4 m·s–1. New measurements for 1-butanol, used as a calibration test substance, are reported with good agreement with literature data, with 0.2% differences. Correlations for the speed of sound for 1-butanol and biodiesel were developed for pressure and temperature ranges with accuracy better than the measurement uncertainty. A very recent predictive method for the speed of sound of biodiesel was tested with the data of this work, resulting in average percent deviations of only 0.12%. Differences in the speed of sound between biodiesel and diesel are presented and discussed.
中文翻译：
压力对废弃食用油生物柴油声速的影响
了解在高压和宽温度范围内与柴油混合的生物柴油的声速对于优化柴油发动机运行中的喷射过程很重要。关于生物柴油的文献中声音数据的实验速度是稀缺的。出于这个原因，作者试图在 303–343 K 的温度范围和从大气压到 25 MPa 的压力范围内评估温度和压力对用过的食用油生物柴油 (UCO) 声速的影响。为此，使用带有两个超声波探头的声学单元进行声速测量。测量的不确定度估计为 1.4 m·s –1. 据报道，用作校准测试物质的 1-丁醇的新测量值与文献数据具有良好的一致性，差异为 0.2%。针对压力和温度范围开发了 1-丁醇和生物柴油的声速相关性，其准确性优于测量不确定性。用这项工作的数据测试了一种最近的生物柴油声速预测方法，结果平均百分比偏差仅为 0.12%。介绍并讨论了生物柴油和柴油之间的声速差异。
更新日期：2022-09-22
中文翻译：
压力对废弃食用油生物柴油声速的影响
了解在高压和宽温度范围内与柴油混合的生物柴油的声速对于优化柴油发动机运行中的喷射过程很重要。关于生物柴油的文献中声音数据的实验速度是稀缺的。出于这个原因，作者试图在 303–343 K 的温度范围和从大气压到 25 MPa 的压力范围内评估温度和压力对用过的食用油生物柴油 (UCO) 声速的影响。为此，使用带有两个超声波探头的声学单元进行声速测量。测量的不确定度估计为 1.4 m·s –1. 据报道，用作校准测试物质的 1-丁醇的新测量值与文献数据具有良好的一致性，差异为 0.2%。针对压力和温度范围开发了 1-丁醇和生物柴油的声速相关性，其准确性优于测量不确定性。用这项工作的数据测试了一种最近的生物柴油声速预测方法，结果平均百分比偏差仅为 0.12%。介绍并讨论了生物柴油和柴油之间的声速差异。
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