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

Nawar Al-Esawi; Mansour Al Qubeissi; Sergei S. Sazhin; Reece Whitaker

doi:10.1016/j.icheatmasstransfer.2018.08.018

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

Nawar Al-Esawi, Mansour Al Qubeissi, Sergei S. Sazhin, Reece Whitaker

Engineering

Research output: Contribution to Journal › Article › peer-review

Abstract

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.

Original language	English
Pages (from-to)	177-182
Number of pages	6
Journal	International Communications in Heat and Mass Transfer
Volume	98
Early online date	26 Sept 2018
DOIs	https://doi.org/10.1016/j.icheatmasstransfer.2018.08.018
Publication status	Published - 1 Nov 2018

Keywords

Activity coefficient
Ethanol
Evaporation
Fuel blends
Gasoline
Heating

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10.1016/j.icheatmasstransfer.2018.08.018

Al-Esawi_Nawar_etal_2018_Elsevier_The_impacts_of_the_activity_coefficient_on_heating_and_evaporation_of_ethanol_gasoline_fuel_blendsAccepted author manuscript, 1.33 MBLicence: CC BY-NC-ND

Dr Nawar Al-Esawi
- nawar.al-esawinorthampton.acuk
- University of Northampton, Technology - Senior Lecturer in Mechanical Engineering
Person

Cite this

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title = "The impacts of the activity coefficient on heating and evaporation of ethanol/gasoline fuel blends",

abstract = "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.",

keywords = "Activity coefficient, Ethanol, Evaporation, Fuel blends, Gasoline, Heating",

author = "Nawar Al-Esawi and {Al Qubeissi}, Mansour and Sazhin, {Sergei S.} and Reece Whitaker",

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T1 - The impacts of the activity coefficient on heating and evaporation of ethanol/gasoline fuel blends

AU - Al-Esawi, Nawar

AU - Al Qubeissi, Mansour

AU - Sazhin, Sergei S.

AU - Whitaker, Reece

PY - 2018/11/1

Y1 - 2018/11/1

N2 - 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.

AB - 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.

KW - Activity coefficient

KW - Ethanol

KW - Evaporation

KW - Fuel blends

KW - Gasoline

KW - Heating

U2 - 10.1016/j.icheatmasstransfer.2018.08.018

DO - 10.1016/j.icheatmasstransfer.2018.08.018

M3 - Article

SN - 0735-1933

VL - 98

SP - 177

EP - 182

JO - International Communications in Heat and Mass Transfer

JF - International Communications in Heat and Mass Transfer

ER -

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

Abstract

Keywords

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Dr Nawar Al-Esawi

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