The impacts of the activity coefficient on heating and evaporation of ethanol/gasoline fuel blends

被引：21
作者：
Al-Esawi, Nawar [1 ]
Al Qubeissi, Mansour [1 ,2 ]
Sazhin, Sergei S. [3 ]
Whitaker, Reece [2 ]
机构：
[1] Coventry Univ, Inst Future Transport & Cities, Coventry CV1 5FB, W Midlands, England
[2] Coventry Univ, Fac Engn Environm & Comp, Sch Mech Aerosp & Automot Engn, Coventry CV1 2JH, W Midlands, England
[3] Univ Brighton, Sch Comp Engn & Math, Adv Engn Ctr, Brighton BN2 4GJ, E Sussex, England
来源：
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER | 2018年 / 98卷
基金：
英国工程与自然科学研究理事会;
关键词：
Activity coefficient; Ethanol; Evaporation; Fuel blends; Gasoline; Heating; VAPOR-PRESSURE MEASUREMENTS; GASOLINE; BIODIESEL; VAPORIZATION; DROPLETS; DIESEL; MODEL; PREDICTIONS;
D O I：
10.1016/j.icheatmasstransfer.2018.08.018
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
The evolutions of droplet radii and temperatures for ethanol and gasoline fuels and their blends are investigated using a modified version of the Discrete Component (DC) model, taking into account the effect of the activity coefficient (AC). The universal quasi-chemical functional group AC (UNIFAC) model is used to predict the ACs of the blended ethanol and gasoline fuels approximated by 21 components. In contrast to previous studies, it is shown that droplet lifetimes predicted for pure gasoline are not always shorter than those predicted for ethanol/gasoline blends. They depend on the total vapour pressure of the mixture. It is shown that the original DC model predicts ethanol/gasoline fuel droplet lifetimes with errors up to 5.7% compared to those predicted using the same model but with the ACs obtained from the UNIFAC model.
引用
收藏
页码：177 / 182
页数：6
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