The Effect of throttle valve positions on thermomechanical exergy, burned fuel exergy, exergy with heat transfer and exergy with work transfer of an SI Engine

Eslami, Maryam; Rostami, Sajjad; Kiani, Mostafa; Ghobadian, Barat

The Effect of throttle valve positions on thermomechanical exergy, burned fuel exergy, exergy with heat transfer and exergy with work transfer of an SI Engine

Authors

Maryam Eslami

Sajjad Rostami

Mostafa Kiani

Barat Ghobadian

Abstract

The aim of the present study was to examine the effect of throttle valve opening positions on the analysis of MVH 418 engine exergy using ethanol-gasoline mixtures ( ، ، ، and ). In so doing, the definitions dealing with exergy and pertinent exergy equations as well as their applications for closed systems were provided. The results of this study showed that the largest share of the irreversibility in the engine was combustion process. In addition, the results showed thermomechanical exergy, burned fuel exergy, exergy with heat transfer and exergy with work transfer, for ، and fuels in full throttle valve opening were higher compared to the 25%, 50%, and 75% throttle valve opening positions. Furthermore, it was found that the efficiency of thermodynamic second law in 25%, 50%, and 75% throttle valve opening positions were reduced for 18.7%, 29%, 60.6%, for 21.5%, 32.7%, 61.5%, for 23%, 35.4%, 62.5%, for 22.8%, 35.5%, 63.6%, and for fuel 27%, 40%, 65% respectively compared to 100% position.

Keywords

Exergy Analysis

Throttle valve position

Ethanol

Gasoline

SI Engine