| 摘要: |
| 目的 通过在油库发油系统中输入修正数据，开发一种可实现乙醇汽油温度、体积计量结果自动修正的方法，以提高采用管道比例调合生产的车用乙醇汽油温度、体积计量的准确度。方法 首先，对车用乙醇汽油调合的体积修正系数计算模型进行分析，结果表明，其体积修正系数由温度修正值和温度变化区间体积膨胀系数均值、等温体积修正系数共同确定。在此基础上，通过对非等温车用乙醇汽油调合温度与热平衡等温车用乙醇汽油调合温度精测对比试验，验证了两者温度修正值互相替代的可行性。通过精测各温度点的乙醇密度、组分油密度、车用乙醇汽油密度与等温乙醇、组分油调合前后的温度，分析得到了车用乙醇汽油调合的温度修正值和体积修正系数。结果 对于乙醇体积分数为8%~12%，温度范围为5~35 ℃的乙醇、组分油调合，该研究成果能减小温度误差1.702~3.990 ℃、体积误差0.110%~0.285%。结论 经现场验证，该方法能有效地提高采用管道比例调合生产的车用乙醇汽油温度、体积计量的准确度，对我国进一步推广使用乙醇汽油具有一定的参考价值。 |
| 关键词: 乙醇汽油 乙醇密度 调合 温度 体积 准确度 |
| DOI：10.3969/j.issn.1007-3426.2025.01.018 |
| 分类号: |
| 基金项目:广西科技创新基地建设项目（桂科ZY21195004） |
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| Method of improving accuracy of temperature and volume measurement of ethanol gasoline |
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Yu WU, Xiaohui FAN, Jincheng LIU, Wenxue ZHANG, Haizhen HUANG
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Guangxi Zhuang Autonomous Region Institute of Metrology & Test, Nanning, Guangxi, China
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| Abstract: |
| Objective Developing a method for automatically correcting the temperature and volume measurement results of ethanol gasoline by inputting correction data into the oil delivery system of tank farm, this can improve the accuracy of temperature and volume measurement of ethanol gasoline for motor vehicles produced by pipeline proportion blending. Method First, through analyzing the volume calculation model of ethanol gasoline blending for motor vehicles, the results showed that its volume correction coefficient is determined by the temperature correction value, the average value of volume expansion coefficient in the temperature change range, and the isothermal volume correction coefficient. On this basis, through a comparison test of temperature precise measurement between non isothermal ethanol gasoline blending and thermal equilibrium isothermal ethanol gasoline blending, the study verified the feasibility of replacing each other's temperature correction values. By precise measuring the ethanol density, component oil density, ethanol gasoline for motor vehicles density, and temperature values before and after isothermal ethanol and component oil blending at each temperature point, the study analyzed the temperature correction value and volume correction coefficient of blending ethanol gasoline for motor vehicles. Result The experimental results show that for ethanol and component oil blending at 5—35 ℃ with ethanol volume fraction of 8%—12%, the research results can reduce temperature errors of 1.702—3.990 ℃ and volume errors of 0.110%—0.285%. Conclusion Field applications illustrated that the method can effectively improve the temperature and volume measurement accuracy of ethanol gasoline for motor vehicles produced by pipeline proportion blending, and has good application value for further promoting the use of ethanol gasoline for motor vehicles in China. |
| Key words: ethanol gasoline ethanol density blending temperature volume accuracy |
