陈家庆^1,,
汤水清²,
刘美丽¹,
张雪¹,
俞接成¹
1.北京石油化工学院环境工程系,北京 102617
2.中国核电工程有限公司,北京 100840
基金项目: 北京市教委科技发展计划重点项目暨北京市自然科学基金重点项目(B类)(KZ201410017019)

Simulation of ORVR vehicle refueling based on lumped parameter model

CHEN Jiaqing^1,,
TANG Shuiqing²,
LIU Meili¹,
ZHANG Xue¹,
YU Jiecheng¹
1.Department of Environmental Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617, China
2.China Nuclear Power Engineering Co.Ltd., Beijing 100840, China

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摘要:在机动车加油过程中,由于蒸发排放产生的挥发性有机物不仅是大气中VOCs的重要源头之一,而且会造成巨大的能源损失；因此, 车载加油油气回收技术(ORVR)逐渐受到重视。获得关键部位的压力变化对设计ORVR系统至关重要,但国内外针对机动车加油过程流动机理的研究工作较少。针对ORVR机动车加油过程,建立了一种包括加油管、燃油箱和翻车阀等的集总参数模型,通过MATLAB编程对建立的微分控制方程进行了隐式求解,并通过实验验证了集总参数模型的可靠性；研究了燃油系统的几何结构、加油枪加油速率、燃油挥发性、燃油箱中的空气/燃油蒸汽比例等参数对压力变化的影响程度,成功预测了在加油过程中加油管和燃油箱内气相空间的压力变化。计算结果表明,在加油过程中,加油速度和汽油的RVP值对气相压力的影响最大；翻车阀直径对气相压力的影响次之；加油管直径和空隙比对气相压力几乎没有影响。
关键词: 机动车/
加油排放/
集总参数模型/
气相压力

Abstract:Evaporative emissions of oil gas during vehicle refueling are not only main sources of volatile organic compounds (VOCs) in the atmosphere, but also cause great energy losses. Therefore, the technology of on-board refueling vapor recovery (ORVR)has attracted more and more attention. The gas pressure is a critical parameter during the design of ORVR systems.At present, there are few researches on the flow mechanism of vehicle refueling process. In this paper, a lumped parameter model covering filler pipe, fuel tank and vent valve was established to simulate the refueling process for the vehicle with ORVR system. The model equations were solved through the MATLAB programming based on implicit methods. The reliability of the lumped parameter model was verified by the experiment results. The influences of some parameters on fuel vapor pressure, such as geometric structure of fueling system, fuel flow rate of fuel nozzle, fuel evaporation and the ratio of air and fuel vapor in the fuel tank, were investigated. The variations of vapor pressure in the gas-phase space of the filler pipe and the fuel tank during the fueling process were estimated successfully. The results show that the different parameters have different influenceson gas pressure, and the order is the refueling rate and the RVP value of gasoline,the diameter of the reversing valve,the diameter and void ratio of the filler pipe.
Key words:motor vehicle/
refueling emission/
lumped parameter model/
vapor phase pressure.

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基于集总参数模型的ORVR机动车加油过程模拟

陈家庆^1,,
汤水清²,
刘美丽¹,
张雪¹,
俞接成¹
1.北京石油化工学院环境工程系,北京 102617
2.中国核电工程有限公司,北京 100840
基金项目: 北京市教委科技发展计划重点项目暨北京市自然科学基金重点项目(B类)(KZ201410017019)
关键词: 机动车/
加油排放/
集总参数模型/
气相压力
摘要:在机动车加油过程中,由于蒸发排放产生的挥发性有机物不仅是大气中VOCs的重要源头之一,而且会造成巨大的能源损失；因此, 车载加油油气回收技术(ORVR)逐渐受到重视。获得关键部位的压力变化对设计ORVR系统至关重要,但国内外针对机动车加油过程流动机理的研究工作较少。针对ORVR机动车加油过程,建立了一种包括加油管、燃油箱和翻车阀等的集总参数模型,通过MATLAB编程对建立的微分控制方程进行了隐式求解,并通过实验验证了集总参数模型的可靠性；研究了燃油系统的几何结构、加油枪加油速率、燃油挥发性、燃油箱中的空气/燃油蒸汽比例等参数对压力变化的影响程度,成功预测了在加油过程中加油管和燃油箱内气相空间的压力变化。计算结果表明,在加油过程中,加油速度和汽油的RVP值对气相压力的影响最大；翻车阀直径对气相压力的影响次之；加油管直径和空隙比对气相压力几乎没有影响。

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