Investigation study for the effect using LPG on characteristics of gasoline engine

ABSTRACT

This paper presents an experimental study of the effectusing LPG instead of gasoline fuel on single-cylinder spark-ignition engine characteristics. The experiments were carried out at different engine loads and variable engine speed of (2400–3600) rpm. Significantreductionin brake specific fuel consumption by (5.42%)when LPG fuel was used as compared to gasoline. The use of LPG leads to a decrease in volumetric efficiency and brake thermal efficiency. The concentration CO and CO₂ emissions is decreased by (11.54%, 14.4%) respectively with LPG compared to gasoline, except for the concentration of NOx, which increases by (10.8%) due to higher cylinder pressure and temperature in the case of LPG fuel compared to gasoline. The obtained results are validated with the same case study numerically with the help of simulation software Diesel-rk as well as with the results of other researchers.

KEYWORDS:

• LPG
• Spark ignition (SI)
• Gasoline
• Performance Characteristics
• Combustion
• Diesel-RK

Nomenclature

bsfcbrake specific fuel consumption (kg/kW. hr)

${\rho }_a$is the inlet air density in (kg/m3)

LCVLower calorific value (kJ/kg)

NEngine speed (rpm)

LPGLiquefied petroleum gas

SISpark ignition

BPBrake power (kW)

EPelectric-power in (kW)

VVoltege (V)

ICurrant (A)

BrakeThermalEfficiency (%)$m_f^{.}$, The mass flow rate of fuel (petrol, LPG) (kg/hr)

η_VVolumetricEfficiency (%)

${\rho }_f$density of fuel in (kg/m3)

$m_a$is the mass of air inducted into the cylinder per cycle

$v_f^{.}$Volume flow rate in (L/hr)

Disclosure statement

The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

Data availability statement

The authors confirm that the data supporting the findings of this study are available within the article [and/or] its supplementary materials.

Declarations

No funding was received to assist with the preparation of this manuscript

Additional information

Notes on contributors

Ghufran Talib Hashem

Gufran Talib Hashem is currently M.Sc student Department of Mechanical Engineering, College of Engineering ,University of Al-Qadisiyah, Iraq . She has completed B.Sc in (Mechanic) from University of Al-Qadisiyah, Iraq in the year 2009. Her research interest in energy and thermal engineering with special interest on alternative fuels and renewable energy. Currently she is doing her research in the field of using LPG in spark ignition engine.

Mohamed F. Al-Dawody

Mohamed F. Al-Dawody is currently working as Assist. Professor , Department of Mechanical Engineering, College of Engineering ,University of Al-Qadisiyah, Iraq . He has completed PhD in (Power Mechanic) from Andhra University, India in the year 2014 and his Master degree (Power Mechanics) from Babylon university, Iraq in the year 2006 and B.Sc in (Mechanic) from university of Babylon, Iraq in the year 2002. His research interest in energy and thermal engineering with special interest on alternative fuels and renewable energy. Currently he is doing his research in the field of using biodiesel blending in diesel engine.